JP2018100578A - Jacket position adjustment mechanism and construction method of floor foundation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately manage the installation state of a plurality of suction foundations without using a template, and to install one jacket on a plurality of suction foundations, to improve the horizontality of the joint flange surface at the upper end of the foundation. Manage with high accuracy. SOLUTION: A plurality of suction foundations 32 integrally include a connecting sheath pipe 34 having an inner space portion which is open at least above, and a jacket has a plurality of legs 42 extending downward, and a plurality of legs. 42 is inserted into each of the corresponding connecting sheath pipes 34, and the jacket position adjusting mechanism 10 is a temporary fixing mechanism for temporarily fixing the connecting sheath pipe 34 and the leg 42 inserted into the connecting sheath pipe 34. It has a height position adjusting mechanism 14 for adjusting the height positions of the plurality of legs 42, respectively. [Selection diagram] Fig. 6

Description

  The present invention relates to a jacket position adjusting mechanism and a method for constructing a landing base. The jacket is a jacket used for a flooring foundation. INDUSTRIAL APPLICABILITY The present invention can be suitably used when constructing a floor foundation for offshore wind power generation facilities.

  For the foundation structure of offshore wind power generation equipment, the optimal structure type is selected according to the conditions such as water depth and ground, but the selected structure type is roughly divided into “floor type” and “floating type” Can do. The choice of “landing” or “floating” is mainly based on the water depth.

  Pile-type foundations and gravity-type foundations are the main foundation types of the “flooring type” (see, for example, Non-Patent Documents 1 and 2). There are several types of pile-type foundations, but if the ground is somewhat hard up to a depth of about 30m, a monopile structure is often used, and if the ground is soft up to a depth of about 60m, a jacket structure is used. Is often used. Gravity foundations are often used when it is difficult to place piles at a relatively shallow depth (up to a depth of about 30 m), where the bottom of the seabed is hard.

  On the other hand, offshore wind power generation facilities tend to have larger windmills than onshore.

  When the wind turbine is enlarged, it is necessary to increase its own weight in the case of a gravity foundation, and in the case of a pile foundation, it is necessary to increase the diameter or increase the number of piles.

  Construction of heavy gravity foundations requires a large hoisting ship, and construction of large piles requires a large pile driving ship. There are relatively few hoisting ships and pile driving ships).

  On the other hand, there is a suction foundation as a “flooring” foundation type other than a pile foundation and a gravity foundation. Suction foundations have the advantage of requiring no large work boats for construction, although there are restrictions on conditions such as water depth and seabed.

  The suction foundation used for offshore wind power generation facilities has already been used overseas (for example, see Non-Patent Document 3). In this overseas case, the lower leg of the jacket is the suction foundation, and this jacket and the suction foundation are integrated at the time of production. And this jacket and the suction foundation are installed in the seabed ground in an integrated state.

  It should be noted here that when installing the foundation of an offshore wind power generation facility, in order to ensure the performance of the wind turbine, strict accuracy control is required for the horizontality of the joint flange surface at the top of the foundation to be joined to the wind turbine tower. It is.

  In the suction foundation, the level of the joint flange surface is ensured by controlling the amount of suction penetration into the sea bottom.

  However, it is possible to manage the penetration amount of the suction into the sea bottom with a certain degree of accuracy. However, in order to ensure the accuracy from the viewpoint of ensuring the level of the joint flange surface, considerable labor is required. Cost.

  In addition, in order to perform full-scale offshore wind power generation, it is necessary to increase the number of installed units, and it is not possible to strictly control the amount of suction penetration to the sea floor for each offshore wind power generation facility. It is considered efficient.

  On the other hand, in the Japanese Patent Application No. 16-160002, which is an unpublished prior application filed by the present applicant, the present applicant uses a split structure for the jacket and the suction foundation, and at the joint between the jacket and the suction foundation. A height adjustment mechanism was established, and it was proposed to install the jacket on the suction foundation installed on the seabed ground after the suction foundation was installed on the seabed ground.

  When installing multiple suction foundations on the submarine ground in advance, and then installing one jacket on the multiple suction foundations installed on the submarine ground, the separation distance between the suction foundations and the verticality of the suction foundation must be managed accurately. There is a need. The installation accuracy of the suction foundation (the installation position of the suction foundation and the verticality of the suction foundation) is less than the clearance at the joint between the suction foundation and the jacket leg (the gap between the suction foundation sheath and the pipe and the jacket leg is about 100 mm or less). Since it is necessary to manage with accuracy, when installing as described above, a temporary material such as a template (template) for accurately installing the suction foundation is required. The template (template) needs to be sized according to the scale of the foundation, and if the wind turbine is enlarged, there is a possibility that the cost will be significantly increased. For example, Patent Document 1 and Non-Patent Document 4 describe a template for use when installing a plurality of foundation elements on the seabed ground.

JP 2012-12930 A

"Draft of technical guidelines for offshore wind power generation facilities at ports", March 2015, Ministry of Land, Infrastructure, Transport and Tourism Port Authority "Guidebook for introduction of offshore wind power generation (first edition)", September 2015, New Energy and Industrial Technology Development Organization “Guidebook for the introduction of ground-based offshore wind power generation (first edition)”, September 2015, New Energy and Industrial Technology Development Organization, p.327 “Guidebook for introduction of offshore wind power generation (first edition)”, September 2015, New Energy and Industrial Technology Development Organization, p.241-242

  The present invention has been made in view of the above-described problems, can accurately manage the installation state of a plurality of suction foundations without using a template (template), and has a plurality of suction foundations. It is an object of the present invention to provide a jacket position adjustment mechanism and a method for constructing a floor foundation that can accurately manage the level of the joining flange surface at the upper end of the foundation when one jacket is installed.

  This invention solves the said subject with the construction method of the following jacket position adjustment mechanisms and a landing type foundation.

  That is, the jacket position adjusting mechanism according to the present invention includes a plurality of suction foundations and a jacket position adjustment for adjusting the position of the jacket of a flooring foundation having a jacket attached to the plurality of suction foundations. The plurality of suction foundations are each integrally provided with a connecting sheath tube having at least an inner space that is open at the top, and the jacket has a plurality of legs extending downward, The leg is inserted into the corresponding connecting sheath tube, and the jacket position adjusting mechanism includes a temporary fixing mechanism that temporarily fixes the connecting sheath tube and the leg inserted into the connecting sheath tube. And a height position adjusting mechanism for adjusting the height position of each of the plurality of legs.

  Here, in the present application, the jacket is a general term for a frame structure mainly composed of steel members.

  Further, in the present application, the temporary fixing is temporary fixing performed before fixing the main installation, and is fixing that can be released without breaking.

  In addition, “the plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at the top” means that the plurality of suction foundations are open at least at the top. Each of the connecting sheaths and pipes having an inner space is provided, and the connecting sheaths and pipes are integrated with the suction foundation, respectively. The meaning of the wording shall be interpreted similarly.

  The height position adjusting mechanism may be arranged between the lower end of the leg and the suction foundation and arranged inside the connecting sheath.

  A plurality of the height position adjusting mechanisms may be provided and arranged one by one at the lower ends of the plurality of legs.

  For example, an air jack or a water jack can be used as the height position adjusting mechanism.

  For example, a sand jack can be used as the height position adjusting mechanism.

  The jacket position adjusting mechanism may further include a suction hose, in which case, the suction hose is disposed outside the leg along the outer peripheral surface of the leg in the substantially longitudinal direction of the leg, The tip of the suction hose reaches the inside of the suction foundation, the suction hose communicates with the inside of the suction foundation, and the suction hose passes through a bracket attached to the outer peripheral surface of the leg. It is attached to the leg, and is configured such that at least a part of the suction hose portion positioned between the lowest bracket among the brackets and the upper surface of the suction base is extendable May be.

  Here, the suction hose is a tubular body that communicates with the inside of the suction foundation from the outside of the suction foundation, and is a tubular body that allows fluid to move through the internal space of the tubular body in a substantially longitudinal direction of the tubular body. It is the body. Therefore, water can be drained from the inside of the suction foundation through the suction hose, and water can be poured into the inside of the suction foundation.

  The plurality of legs are each filled with a grout material at the lower end portion, and the lower end portion of the leg filled with the grout material and the connecting sheath tube have holes for temporary fixing at corresponding positions, respectively. When provided, the temporary fixing mechanism includes the leg having the temporary fixing hole provided in the lower end, the grout material filled in the lower end of the leg, and the temporary fixing The connecting sheath pipe provided with a hole, and a rod-shaped member that passes through the temporary fixing hole of the connecting sheath and the temporary fixing hole of the leg may be provided. .

  A plurality of the temporary fixing holes of the connecting sheath pipe are provided at different positions in the circumferential direction of the connecting sheath pipe, and a plurality of the temporary fixing holes of the leg are provided at different positions in the circumferential direction of the leg. You may comprise so that it may provide in a position.

  The plurality of temporary fixing holes of the connecting sheath tube are provided at different positions in the height direction of the connecting sheath tube, and the plurality of temporary fixing holes of the leg are provided in the height direction of the leg. They may be provided at different positions.

  The plurality of temporary fixing holes of the connecting sheath and pipe are provided at two different height positions, 8 at each position where the connecting sheath and pipe are substantially equally divided in the circumferential direction, A plurality of temporary fixing holes may be provided at two different height positions, each at a position where the legs are substantially equally divided in the circumferential direction.

  The inner peripheral surface of the temporary fixing hole of the connecting sheath tube is threaded, and the outer peripheral surface of the rod-shaped member is also the inner peripheral surface of the temporary fixing hole of the connecting sheath tube. It is preferable that the threading process is performed so as to correspond to the threading process, and the tip of the rod-shaped member is processed into a conical shape.

  The hole for temporary fixing of the leg may be a long hole that is long in the height direction.

  The temporary fixing mechanism is a connecting rod whose length is adjustable, and one end of the connecting rod is connected to the outer peripheral surface of the leg, and the other end of the connecting rod is the outer periphery of the connecting sheath tube. You may comprise so that it may be connected with the surface.

  Here, “one end of the connecting rod is connected to the outer peripheral surface of the leg” is not only the case where one end of the connecting rod is directly connected to the outer peripheral surface of the leg, but also the outer peripheral surface of the leg. It is a concept including the case where it is indirectly connected to the outer peripheral surface of the leg via another member connected to the `` the other end of the connecting rod is connected to the outer peripheral surface of the connecting sheath tube '' Is not only when the other end of the connecting rod is directly connected to the outer surface of the connecting sheath but also indirectly through another member connected to the outer surface of the connecting sheath. It is a concept including the case where it is connected to the outer periphery of the connecting sheath.

  At least one of the one end or the other end of the connecting rod may have a hook structure.

  You may comprise so that the said one end of the said connecting rod may be pin-joined with the bracket connected with the outer peripheral surface of the said leg, and the said other end of the said connecting rod may be made into a hook structure.

  The one end of the connecting rod may have a hook structure, and the other end of the connecting rod may be configured to be pin-joined with a bracket connected to an outer peripheral surface of the connecting sheath.

  The connecting rod may be provided with a turnbuckle mechanism.

  A first aspect of a method for constructing a grounding foundation according to the present invention is a construction method for constructing a grounding foundation having a plurality of suction foundations and a jacket attached to the plurality of suction foundations. The plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at the top, and the jacket has a plurality of legs extending downward, and the plurality of legs Are respectively inserted into the corresponding connecting sheath pipes, and comprise the plurality of suction foundations, the jackets, and the jacket position adjusting mechanism for adjusting the positions of the jackets of the landing foundations. The temporary fixing mechanism of the jacket position adjusting mechanism temporarily fixes the connecting sheath tube and the leg inserted into the connecting sheath tube. A sinking step of sinking the body on the bottom of the ground, and draining the water inside the plurality of suction foundations of the landing-type foundation temporary fixing body sinked on the bottom of the ground in the sinking step. A suction process for installing the foundation on the bottom ground, and the temporary fixing of the temporary fixing mechanism of the jacket position adjusting mechanism, and the relative relationship between the connecting sheath pipe and the leg inserted into the connecting sheath pipe In the temporary fixing releasing step that enables movement and the height position adjusting mechanism, the leg is moved in a substantially vertical direction relative to the connecting sheath tube into which the leg is inserted, and A leg height adjusting step for adjusting the height position of the leg, and an integration for integrating the leg whose height position has been adjusted in the leg height adjusting step and the connecting sheath into which the leg is inserted. Providing a process A method for constructing a landing foundations characterized.

  A second aspect of the method for constructing a grounding foundation according to the present invention is a construction method for constructing a grounding foundation having a plurality of suction foundations and a jacket attached to the plurality of suction foundations. The plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at the top, and the jacket has a plurality of legs extending downward, and the plurality of legs Are respectively inserted into the corresponding connecting sheath pipes, and comprise the plurality of suction foundations, the jackets, and the jacket position adjusting mechanism for adjusting the positions of the jackets of the landing foundations. The temporary fixing mechanism of the jacket position adjusting mechanism temporarily fixes the connecting sheath tube and the leg inserted into the connecting sheath tube. A sinking step of sinking the body on the bottom of the ground, and draining the water inside the plurality of suction foundations of the landing-type foundation temporary fixing body sinked on the bottom of the ground in the sinking step. A suction process for installing the foundation on the bottom ground, and the temporary fixing of the temporary fixing mechanism of the jacket position adjusting mechanism, and the relative relationship between the connecting sheath pipe and the leg inserted into the connecting sheath pipe In the temporary fixing releasing step that enables movement and the height position adjusting mechanism, the leg is moved in a substantially vertical direction relative to the connecting sheath tube into which the leg is inserted, and A leg height adjusting step for adjusting the height position of the leg, and the leg whose height position has been adjusted in the leg height adjusting step is temporarily fixed to the connecting sheath tube into which the leg is inserted. Re-temporary fixing step and said re-temporary fixing A method for constructing a landing foundations, characterized in that it comprises a integration step of provisionally fixed the legs and the legs are integrated with the connecting sheath pipe is plugged, at step.

  In the integration step, a grout material may be filled and integrated between the leg and the connecting sheath into which the leg is inserted.

  According to the present invention, it is possible to accurately manage the installation state of a plurality of suction foundations without using a template (template), and when one jacket is installed on a plurality of suction foundations, the upper ends of the foundations are joined. The level of the flange surface can be accurately managed.

The front view of the offshore windmill 100 for wind power generation constructed | assembled using the jacket position adjustment mechanism 10 which concerns on 1st Embodiment of this invention. The front view which expands and shows the site | part of the landing type foundation 30 of the offshore windmill 100 III-III sectional view of FIG. Side view of the suction foundation 32 of the landing foundation 30 Side view of jacket 40 to which jacket position adjusting mechanism 10 according to the first embodiment is applied. 1 is a vertical sectional view schematically showing a jacket position adjusting mechanism 10 according to a first embodiment. VII-VII line sectional view of FIG. Vertical sectional view schematically showing a state of the height position adjusting device 14 during contraction Vertical sectional view schematically showing the state of the height position adjusting device 14 during expansion Side view schematically showing an example (expandable part 16B1) in which a high-pressure hose is arranged in the expandable part 16B Side view schematically showing an example (stretchable part 16B2) in which a stretchable flexible telescopic hose is arranged in the stretchable part 16B. In the first embodiment, a vertical sectional view schematically showing one leg 42 of the landing-type foundation temporary fixing body 36. In 1st Embodiment, the vertical sectional view about one leg 42 which shows typically the state after installing the suction foundation 32 of the landing type foundation temporary fixing body 36 to the water bottom 120 In 1st Embodiment, the vertical sectional view about one leg 42 which shows typically the state which finished adjusting the height position after temporary fixing cancellation | release In the first embodiment, a vertical sectional view of one leg 42 schematically showing a state after the cement grout 20 is filled between the connecting sheath tube 34 and the leg 42 after temporary fixing again. Vertical sectional view schematically showing a jacket position adjusting mechanism 60 according to a second embodiment of the present invention. In 2nd Embodiment, the vertical sectional view about one leg 72 which shows typically the state after installing the suction foundation 32 of the landing type foundation temporary fixing body 63 to the water bottom 120 In 2nd Embodiment, the vertical sectional view about one leg 72 which shows the state which finished the adjustment of a height position after temporary fixation cancellation | release In the second embodiment, a vertical sectional view of one leg 72 schematically showing a state after the cement grout 21 is filled between the connecting sheath pipe 35 and the leg 72 after temporary fixing again. Vertical sectional view schematically showing a jacket position adjusting mechanism 80 according to a third embodiment of the present invention. In 3rd Embodiment, the vertical sectional view about one leg 73 which shows typically the state after installing the suction foundation 32 of the landing type foundation temporary fixing body 86 to the water bottom 120 In 3rd Embodiment, the vertical sectional view about one leg 73 which shows the state which finished adjusting the height position after temporary fixation cancellation | release In 3rd Embodiment, the vertical sectional view about one leg 73 which shows typically the state after filling the cement grout 21 between the connection sheath pipe | tube 88 and the leg 73 after temporary fixing again.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Configuration of the First Embodiment FIG. 1 shows an offshore wind turbine 100 for wind power generation constructed using a jacket position adjusting mechanism 10 according to the first embodiment of the present invention. 2 is a front view, FIG. 2 is an enlarged front view showing a portion of the landing-type foundation 30 of the offshore wind turbine 100, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 is a side view of the suction foundation 32 of the landing-type foundation 30. FIG. 5 is a side view of a jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied. However, since it is difficult to describe the jacket position adjusting mechanism 10 in FIGS. 1, 2, and 5 due to the scale, the description of the jacket position adjusting mechanism 10 in FIGS. 1, 2, and 5 is omitted. ing.

  Hereinafter, in (1-1-1), the landing-type foundation 30 (the suction foundation 32 and the jacket 40), to which the jacket position adjusting mechanism 10 is applied, will be described mainly with reference to FIGS. (1-1-2), the jacket position adjusting mechanism 10 according to the first embodiment of the present invention will be described mainly with reference to FIGS. The offshore wind turbine 100 is not a direct application target of the jacket position adjusting mechanism 10, but will be described together in (1-1-1).

(1-1-1) Configuration of Application Target of Jacket Position Adjustment Mechanism 10 according to First Embodiment An offshore wind turbine 100 for wind power generation is configured to include a landing-type foundation 30 and a wind turbine body 102. The windmill body 102 is supported by the floor foundation 30. The windmill main body 102 includes a windmill tower 104, a hub 106, and a blade 108.

  The floor foundation 30 includes a suction foundation 32 installed on the bottom 120 and a jacket 40 supported by the suction foundation 32. The suction foundation 32 is a foundation that stably supports the wind turbine body 102 that is the upper structure by stabilizing the installation position by the pressure of the suction in addition to the weight of the suction foundation and the ballast.

  As shown in FIGS. 1 to 4, the suction foundation 32 has a cylindrical shape as a whole, and a shape viewed from above is a circle. As shown in FIGS. 1 to 4, the grounding foundation 30 has four suction foundations 32, and when viewed from above, the four suction foundations 32 are respectively arranged on the vertices of a substantially square shape. Each of the four suction foundations 32 is integrally provided with one connecting sheath pipe 34 on its upper surface, and the floor foundation 30 is provided with four connecting sheath pipes 34 in total. When viewed from above, the four connecting sheath tubes 34 are respectively arranged on the vertices of a substantially square shape.

  The penetration of the suction foundation 32 into the water bottom 120 is performed using the suction force generated by draining the water in the suction foundation 32 by the suction hose 16 (see FIG. 6) and setting the suction foundation 32 to a hydrostatic pressure or less. .

  The suction foundation 32 can be easily removed by pouring water into the suction foundation 32 from the suction hose 16.

  This ease of removal of the suction foundation 32 has an advantage over other foundation types in wind power generation that assumes complete removal after the operation is completed.

  The material of the suction foundation 32 is not particularly limited, and may be made of steel or concrete, for example.

  The connecting sheath tube 34 is made of steel, and has an inner space that is open at least upward.

  The connecting sheath tube 34 is provided with a temporary fixing hole 34A (see FIGS. 6 and 7) used for temporarily fixing the leg 42 of the jacket 40 through the side surface. A spacer 34B (see FIG. 6) is provided on the inner peripheral surface of the tube 34. The spacer 34 </ b> B is provided on the connecting sheath tube 34 while maintaining a predetermined distance between the outer peripheral surface of the leg 42 inserted into the connecting sheath tube 34 and the inner peripheral surface of the connecting sheath tube 34. Make it easier to insert.

  As shown in FIG. 5, the jacket 40 includes a leg 42, a brace 44, a reinforcing horizontal member 46, and a joint portion 48, and an upper structure (windmill body portion) installed above the jacket 40. 102) and the external force (wind load, earthquake load, etc.) applied to the upper structure (wind turbine main body 102) is transmitted to the suction foundation 32 to stably support the upper structure.

  The leg 42 is a cylindrical steel pipe, and is a member that plays a central role when the jacket 40 exerts the above-described action. The jacket 40 is provided with four legs 42, and when viewed from above, the four legs 42 are arranged to be inclined so as to spread in the diagonal direction of the square as it goes downward. The inclination angle of the leg 42 with respect to the vertical direction is not particularly limited as long as safety can be confirmed.

  The lower end portion of the leg 42 is a vertical portion 42A, and the longitudinal direction of the vertical portion 42A is a substantially vertical direction. In accordance with the position of the vertical part 42A of the four legs 42, four connecting sheath pipes 34 are arranged on the upper portion of the suction foundation 32, and the vertical part 42A of the four legs 42 is connected to the connecting sheath pipe 34. Are inserted into the inner space. A portion where the leg 42 is inserted into the connecting sheath tube 34 has a double tube structure. A leg bottom plate 42B having a shape corresponding to the outer shape of the horizontal section of the vertical portion 42A of the leg 42 is attached to the lower end portion of the vertical portion 42A of the leg 42 by welding. Moreover, the grout material 12A (refer FIG. 6) is filled into the lower part inside the vertical part 42A of the leg 42. The range in which the grout material 12A is filled (the grout material filling portion 42D (see FIG. 6)) is a height range that is approximately twice the diameter of the bottom portion 42B of the leg 42 to the diameter of the vertical portion 42A of the leg 42. . In addition, on the side surface of the vertical portion 42A of the leg 42 (side surface in the same height range as the grout material filling portion 42D), a temporary fixing elongated hole 42C used for temporary fixing to the connecting sheath tube 34 (see FIG. 6). Is provided through. In the temporarily fixing long hole 42C, the grout material 12A filled in the lower part inside the vertical portion 42A of the leg 42 is visible on the surface.

  As shown in FIG. 5, the braces 44 are disposed between the adjacent legs 42 so as to obliquely intersect, and the end portions of the braces 44 are connected to the outer peripheral surface of the legs 42. The brace 44 is a cylindrical steel pipe.

  Further, as shown in FIG. 5, a reinforcing horizontal member 46 is disposed in the horizontal direction between the adjacent legs 42, and the end of the reinforcing horizontal member 46 is located on the outer peripheral surface of the leg 42 (more than the vertical portion 42 </ b> A). It is connected to the outer peripheral surface of a point slightly above. The reinforcing horizontal member 46 is a columnar steel pipe.

  The brace 44 and the reinforcing horizontal member 46 are reinforcing members provided for the jacket 40 to maintain a stable shape.

  In the jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied, a cylindrical steel pipe is used for the leg 42, the brace 44, and the reinforcing horizontal member 46. However, the leg 42, the brace 44, and the reinforcing horizontal member 46 are used. The steel pipe that can be used in the above is not limited to a cylindrical steel pipe, and a steel pipe having a polygonal cross-section can also be used.

  The joint portion 48 is a portion provided at the upper end portion of the jacket 40, and is a portion for stably connecting the upper structure (the windmill main body portion 102) to the jacket 40.

  The joint portion 48 includes a connecting steel pipe 48A, an upper flange 48B, a lower flange 48C, and a web 48D.

  An upper flange 48B is attached to the upper end of the connecting steel pipe 48A, and a lower flange 48C is attached to the lower end of the connecting steel pipe 48A. The upper flange 48B of the connecting steel pipe 48A forms a flange joint (not shown) at the lower end of the upper structure (lower end of the wind turbine tower 104) and a flange joint by bolts. Is connected to the jacket 40.

  The upper flange 48B and the lower flange 48C are also connected to the leg 42, and the overturning moment applied to the upper structure (wind turbine body 102) is converted into a couple of forces by the upper flange 48B and the lower flange 48C to the jacket 40. Communicated.

  Further, the outer periphery of the web 48D is attached to the outer peripheral surface of the connecting steel pipe 48A, the lower surface of the upper flange 48B, the upper surface of the lower flange 48C, and the outer peripheral surface of the leg 42, and the upper structure (wind turbine body 102). The vertical force due to its own weight is converted into a shearing force by the web 48D and transmitted to the jacket 40.

(1-1-2) Configuration of Jacket Position Adjustment Mechanism 10 According to First Embodiment FIG. 6 is a vertical sectional view schematically showing the jacket position adjustment mechanism 10 according to the first embodiment, and FIG. FIG. 7 is a sectional view taken along line VII-VII in FIG. 6.

  The jacket position adjusting mechanism 10 according to the first embodiment includes a temporary fixing mechanism 12 and a height position adjusting device 14. Reference numeral 18 in FIG. 6 denotes a pedestal, which is disposed between the upper surface 32A of the suction foundation 32 and the leg bottom plate 42B of the leg 42, and is initially disposed between the upper surface 32A of the suction foundation 32 and the leg bottom plate 42B of the leg 42. It is a member that determines the distance at the time of temporary fixation (at the time of temporary fixation until installation on the water bottom 120).

  The jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied is temporarily fixed to the jacket position adjusting mechanism 10 until it is installed at a predetermined point on the bottom 120 and the temporary fixing to the suction foundation 32 is released. The mechanism 12 is temporarily fixed to the suction base 32. In a state where the leg 42 of the jacket 40 is inserted into the connecting sheath pipe 34 of the suction foundation 32, the leg 42 of the jacket 40 is connected to the connecting sheath pipe 34 of the suction foundation 32 by the temporary fixing mechanism 12 of the jacket position adjusting mechanism 10. In the present application, a temporarily fixed structure that is in a state before being installed on the water bottom 120 and releasing the initial temporary fixation is referred to as a floor-type foundation temporary fixing body 36 (FIGS. 5 and 6). Reference).

  The temporary fixing mechanism 12 includes a connecting sheath tube 34 provided with a temporary fixing hole 34A, a leg 42 provided with a long hole 42C for temporary fixing at a lower end (vertical portion 42A), and a lower end of the leg 42. A rod-like member 12B that passes through the grout material 12A filled in the lower part of the inside of the portion (vertical portion 42A), the hole 34A for temporarily fixing the connecting sheath 34 and the long hole 42C for temporarily fixing the leg 42; Is provided.

  The grout material 12 </ b> A is a grout material that is filled and hardened in the lower part of the lower end portion (vertical portion 42 </ b> A) of the leg 42. The grout material 12A may be any material that can be screwed into the rod-shaped member 12B whose tip is processed into a conical shape and can secure the strength necessary for supporting the weight of the suction foundation 32. Bentonite grout can be used. The range in which the grout material 12A is filled in the lower part of the lower end portion (vertical portion 42A) of the leg 42 (the grout material filling portion 42D of the leg 42) is twice the diameter of the leg 42 from the leg bottom plate 42B at the lower end of the leg 42. The height range is about.

  The rod-shaped member 12B is a steel rod made of steel, and the tip is processed into a conical shape. Further, the outer peripheral surface is threaded. The threading of the outer peripheral surface of the rod-shaped member 12B is threaded so as to correspond to the threading processing provided on the inner peripheral surface of the connecting sheath 34A for temporarily fixing the pipe 34, and the rod-shaped member 12B The coupling sheath 34 can be screwed into the temporary fixing hole 34A. Further, the rod-like member 12B has a tip processed into a conical shape and can be screwed into the grout material 12A.

  As shown in FIG. 6, the connecting sheath tube 34 is provided with holes 34A for temporary fixation at height positions corresponding to the upper and lower portions of the grout material filling portion 42D. Further, at each height position, as shown in FIG. 7, eight temporary fixing holes 34A are provided so as to be equally divided in the circumferential direction. The inner peripheral surface of the temporary fixing hole 34A is threaded, and the rod-like member 12B that is threaded on the outer peripheral surface can be screwed.

  In the leg 42, the grout material 12A is filled in the lower part inside the lower end (vertical part 42A). The range in which the grout material 12 </ b> A is filled (grout material filling portion 42 </ b> D) is a height range that is about twice the diameter of the leg 42 from the leg bottom plate 42 </ b> B at the lower end of the leg 42. However, the range in which the grout material 12A is filled (the grout material filling portion 42D) is not limited to the above range, and can be appropriately determined by design.

  As shown in FIG. 6, the leg 42 is provided with a long hole 42C for temporary fixing at a height position corresponding to the upper part and the lower part of the grout material filling part 42D. Further, at each height position, as shown in FIG. 7, eight temporary fixing long holes 42C are provided so as to be equally divided in the circumferential direction. The temporarily fixing long hole 42C is a long hole in the height direction, and the height of the temporarily fixing long hole 42C is determined by the jacket 40 and the suction foundation when the landing-type foundation temporary fixing body 36 is manufactured. 32 is set in consideration of the assembly accuracy of 32 and the installation accuracy of the landing-type foundation temporary fixing body 36.

  The leg 42 filled with the grout material 12A in the lower part of the vertical portion 42A is inserted into the connecting sheath tube 34 of the suction foundation 32, and in this state, as shown in FIGS. 6 and 7, the connecting sheath tube 34 is provided. The rod-like member 12B is screwed so as to pass through the temporary-fixing hole 34A and the leg-fixing long hole 42C, and the rod-like member 12B is screwed into the grout material 12A of the grout material filling portion 42D of the leg 42. Thus, the leg 42 can be temporarily fixed to the connecting sheath 32 of the suction foundation 32. A structure in which the leg 42 is temporarily fixed to the coupling sheath 32 of the suction foundation 32 in this manner is referred to as a landing-type foundation temporary fixing body 36.

  The height position adjusting device 14 is disposed below the leg bottom plate 42B of the leg 42, and is disposed inside the connecting sheath tube 34. 42 is a device for adjusting the height position of 42. The height position adjusting device pipe 14 </ b> A of the height position adjusting device 14 is arranged along the substantially longitudinal direction of the leg 42 inside the leg 42, and the leg 42 is inserted in the longitudinal direction. Further, the height position adjusting device pipe 14A of the height position adjusting device 14 is inserted through the through hole 42E (see FIGS. 8 and 9) of the leg bottom plate 42B substantially vertically.

  An air jack, a water jack, or the like can be used as the height position adjusting device 14, but an incompressible fluid is preferably used as the pressure transmission medium from the viewpoint of precise controllability. However, when the jacket position adjusting mechanism 10 according to the first embodiment is used in a water area, it is preferable to use water as the incompressible fluid, and the height position adjusting device 14 may be a water jack. preferable.

  FIG. 8 is a vertical cross-sectional view schematically showing a state of the height position adjusting device 14 during contraction, and FIG. 9 is a vertical cross-sectional view schematically showing a state of the height position adjusting device 14 during expansion. is there. At the time of initial temporary fixing of the jacket position adjusting mechanism 10 according to the first embodiment (at the time of temporary fixing until the landing-type foundation temporary fixing body 36 is installed on the water bottom 120), the height position adjusting device 14 is As shown in FIG. In the stage where the initial temporary fixing of the jacket position adjusting mechanism 10 is released and the height position of the leg 42 is adjusted, the jacket 42 is inflated as shown in FIG. 9 and pushed between the upper surface 32A of the suction foundation 32 and the leg bottom plate 42B. The height position of the leg 42 is adjusted so as to spread.

(1-1-3) Modification of Jacket Position Adjustment Mechanism 10 According to First Embodiment The jacket position adjustment mechanism 10 according to the first embodiment may further include a suction hose 16. Furthermore, the aspect provided with the suction hose 16 is a modification of the jacket position adjustment mechanism 10 which concerns on 1st Embodiment.

  The suction hose 16 is disposed outside the leg 42 along the outer peripheral surface of the leg 42 in the substantially longitudinal direction of the leg 42. The suction hose 16 is a tubular body that communicates the inside of the suction foundation 32 with the outside of the suction foundation 32, and the suction hose 16 is inserted through a through hole 32B (see FIGS. 10 and 11) on the upper surface 32A of the suction foundation 32. Thus, the inside of the suction foundation 32 is communicated with the outside. In the internal space of the suction hose 16, fluid can move in the substantially longitudinal direction. Therefore, water can be drained from the inside of the suction foundation 32 through the suction hose 16, and water can be poured into the inside of the suction foundation 32.

  The suction hose 16 includes a main body portion 16A that does not expand and contract, an expandable and contractible portion 16B, and a lower end portion 16C that is attached to the suction base 32 through the upper surface 32A of the suction base 32.

  The main body portion 16A of the suction hose 16 is attached to the outer peripheral surface of the leg 42 via the bracket 50, and the lower end portion 16C of the suction hose 16 is attached to the suction base 32 through the upper surface 32A of the suction base 32. ing. The upper end of the expansion / contraction part 16B of the suction hose 16 is attached to the lower end of the main body part 16A of the suction hose 16 via the flange 16D, and the lower end of the expansion / contraction part 16B of the suction base 32 is the lower end of the suction hose 16 via the flange 16E. It is attached to the upper end of the part 16C.

  When the temporary fixing of the leg 42 and the connecting sheath tube 34 is released and the height position of the leg 42 is adjusted by the height position adjusting device 14, the height between the bracket 50 and the upper surface 32 </ b> A of the suction foundation 32 is accordingly increased. The distance is changed. In order to cope with this, the suction hose 16 is provided with an expandable / contractible portion 16B between the bracket 50 having the lowest height position and the upper surface 32A of the suction base 32.

  Specific examples of the expansion / contraction part 16B of the suction hose 16 include the expansion / contraction part 16B1 shown in FIG. 10 and the expansion / contraction part 16B2 shown in FIG. The stretchable part 16B1 shown in FIG. 10 is an example in which a high-pressure hose having a sufficient length is disposed in the stretchable part 16B. The stretchable part 16B2 shown in FIG. This is an example of arrangement. The hose used for the expansion / contraction part 16B of the suction hose 16 is not limited to these specific examples, and can follow the expected expansion / contraction amount after temporary fixing and can withstand use as a suction hose. Can be used.

(1-2) Jacket position adjusting method using jacket position adjusting mechanism 10 according to the first embodiment When adjusting the jacket position using the jacket position adjusting mechanism 10 according to the first embodiment, for example, the following ( It can carry out like the procedure of 1a)-(1g).

(1a) Step of making the landing-type foundation temporary fixing body 36 The height position adjusting device 14 is attached to the lower surface of the leg bottom plate 42B of the leg 42, and the height position of the inside of the leg 42 is along the substantially longitudinal direction of the leg 42. The adjusting device piping 14A is disposed. After the height position adjusting device 14 and the height position adjusting device piping 14A are arranged as described above, a grout material 12A (for example, a predetermined height) is formed in advance at a lower portion inside the lower end portion (vertical portion 42A) of the leg 42. The bentonite grout) is filled and solidified to form the grout material filling portion 42D.

  The distance between the upper surface 32A of the suction foundation 32 and the leg bottom plate 42B of the leg 42 at the time of initial temporary fixing (at the time of temporary fixing until the landing-type basic temporary fixing body 36 is installed on the water bottom 120) is determined, and the distance The pedestal 18 having a corresponding height is arranged at a position inside the connecting sheath pipe 34 and on the upper surface 32 </ b> A of the suction foundation 32. The material and shape of the pedestal 18 are not particularly limited as long as the load applied from the leg 42 can be supported, but the height position adjusting device 14 is between the upper surface 32A of the suction foundation 32 and the leg bottom plate 42B of the leg 42. Therefore, the base 18 is required to have a shape that does not interfere with the height position adjusting device 14, and the base 18 is required to be disposed at a position that does not interfere with the height position adjusting device 14.

  After the pedestal 18 having a predetermined shape is arranged at a predetermined position, the leg 42 of the jacket 40 is arranged in the coupling sheath 34 of the suction foundation 32 as shown in FIG. The pedestal 18 is not disposed at a position inside the connecting sheath tube 34, but is attached to the lower surface of the leg bottom plate 42B of the leg 42, and the leg 42 of the jacket 40 is used for connecting the suction foundation 32 in this state. It may be arranged in the sheath tube 34.

  After the leg 42 of the jacket 40 is disposed in the connecting sheath tube 34, the rod-shaped member 12B is inserted so as to pass through the temporarily fixing hole 34A of the connecting sheath tube 34 and the long hole 42C for temporarily fixing the leg 42. By screwing and further screwing the rod-like member 12B into the grout material 12A of the grout material filling part 42D at the lower end of the leg 42, as shown in FIG. Temporarily fix to.

  In this temporary fixing, the rod-like member 12B uses a total of eight steel bars, four on the upper side and four on the lower side.

  By performing this temporary fixing on the four legs 42 of the jacket 40, the landing-type foundation temporary fixing body 36 in which the jacket 40 and the suction foundation 32 are temporarily fixed by the temporary fixing mechanism 12 of the jacket position adjusting mechanism 10 is obtained. Can be obtained. FIG. 12 is a vertical cross-sectional view of one leg 42 of the landing-type foundation temporary fixing body 36.

(1b) Sedimentation process The landing-type foundation temporary fixing body 36 is transported to the installation point, and is sunk at a predetermined point on the bottom 120. At the time of laying, the suction hose 16 is opened and the laying speed is controlled so that excessive buoyancy due to the air in the skirt of the suction foundation 32 does not act on the temporary fixing portion.

(1c) Suction process When the suction foundation 32 is installed on the bottom 120, water inside the suction foundation 32 is drained using the suction hose 16, and the suction foundation 32 is removed by the suction force generated by the water pressure difference between the inside and outside of the suction foundation 32. Install on bottom 120. FIG. 13 is a vertical sectional view of one leg 42 schematically showing a state after the suction foundation 32 of the landing-type foundation temporary fixing body 36 is installed on the water bottom 120.

  Since the jacket 40 and the suction foundation 32 are temporarily fixed by the temporary fixing mechanism 12 of the jacket position adjusting mechanism 10, the four suction foundations 32 are simultaneously installed on the water bottom 120, so that a plurality of templates can be used without using a template (template). The installation state of the (four) suction foundations 32 (installation positions of the four suction foundations 32 and the verticality of the four suction foundations 32) can be managed with high accuracy.

(1d) Temporary fixing release step The eight rod-shaped members 12B used for temporary fixing are reversely rotated and pulled out to release the temporary fixing, so that the leg 42 is movable in the vertical direction.

(1e) Leg height adjustment step After the temporary fixation is released in the temporary fixation release step, the height position is adjusted for each leg 42 by the height position adjustment device 14. By adjusting the height position for each leg 42 with the height position adjusting device 14, the level of the joining flange surface at the upper end of the foundation can be managed more accurately than when adjusting with the penetration amount of the suction foundation 32. . FIG. 14 is a vertical cross-sectional view of one leg 42 schematically showing a state in which the height position has been adjusted after the temporary fixing is released.

(1f) Re-temporary fixing step In the state where the position of the leg 42 after the adjustment of the height position is maintained, the temporarily fixing hole 34A of the connecting sheath tube 34 and the long hole 42C for temporarily fixing the leg 42 are formed. The rod-shaped member 12B is screwed again so as to be inserted, and further the rod-shaped member 12B is screwed into the grout material 12A of the grout material filling portion 42D of the leg 42, so that the leg whose height has been adjusted as shown in FIG. 42 is temporarily fixed again to the connecting sheath tube 34 of the suction foundation 32.

  In this re-temporary fixing, the bar-like member 12B uses a total of eight steel bars, four on the upper side and four on the lower side.

  In the case of re-temporary fixing, the connecting sheaths 34A and the holes 34A for temporary fixing and the long holes 42C for temporarily fixing the legs 42 are not used in the initial temporary fixing. Specifically, at the time of initial temporary fixing, the upper and lower four temporary fixing holes 34A and the upper and lower four temporary fixing elongated holes 42C are used, and the temporary fixing after the height position adjustment is performed again. At this time, the upper and lower four temporary fixing holes 34A and the upper and lower temporary fixing long holes 42C that are not used in the initial temporary fixing are used.

(1g) Integration Step As shown in FIG. 15, the cement grout 20 is filled between the connecting sheath tube 34 and the leg 42 and solidified in the above-described temporary fixing state, and then the connecting sheath tube. 34 and the leg 42 are integrated and fixed in place. FIG. 15 is a vertical sectional view of one leg 42 schematically showing a state after cement grout 20 is filled between the connecting sheath tube 34 and the leg 42 after temporary fixing again. As the cement grout 20, cement milk, mortar, or the like can be used.

(Supplementary information)
The reason for re-temporary fixing in the re-temporary fixing process is to prevent the jacket 40 from shaking until the cement grout 20 is solidified in the integration process. If the fluctuation of the jacket 40 generated until the cement grout 20 is hardened is large, a sufficient bonding strength of the cement grout 20 cannot be obtained.

  Moreover, the height position adjusting device 14 and the pedestal 18 are embedded in the cement grout 20 by filling the cement grout 20. Therefore, since the height position adjusting device 14 and the pedestal 18 cannot be collected after use, it is preferable that they are as inexpensive as possible.

  Moreover, the strength of temporary fixing is the strength of the cement grout 20 to be filled after each construction step (at the time of lifting the landing-type foundation temporary fixing body 36, at the time of sinking to the bottom 120, at the time of penetration into the bottom 120, and after adjusting the height. It has a strength capable of resisting the load acting on the temporarily fixed part during the period until the onset.

  Further, the integration of the connecting sheath tube 34 and the vertical portion 42A of the leg 42 in the integration step may be performed by a method other than the filling of the grout material. A mechanical connection may be used.

(1-3) Effect of Jacket Position Adjustment Mechanism 10 According to First Embodiment By using the temporary fixing mechanism 12 of the jacket position adjustment mechanism 10, four suctions are performed while the jacket 40 and the suction base 32 are temporarily fixed. The foundation 32 can be installed on the bottom 120 at the same time. For this reason, even if it does not use a template (template), the installation state (installation position of the four suction foundations 32 and the perpendicularity of the four suction foundations 32) is managed accurately. be able to.

  Further, after the four suction foundations 32 are installed on the water bottom 120 and the temporary fixing by the temporary fixing mechanism 12 is released, the height position of the jacket position adjusting mechanism 10 is set so that each leg 42 has a target height position. The height position can be adjusted for each leg 42 by the adjusting device 14. For this reason, by using the jacket position adjusting mechanism 10, the level of the joining flange surface at the upper end of the landing-type foundation 30 (the upper end of the jacket 40) is more accurately managed than when the penetration amount of the suction foundation 32 is adjusted. can do.

(2) Second Embodiment (2-1) Configuration of Jacket Position Adjustment Mechanism 60 According to Second Embodiment The jacket position adjustment mechanism 60 according to the second embodiment of the present invention is the first about the height position adjustment device. Although it is the same as the jacket position adjusting mechanism 10 according to the embodiment, the temporary fixing mechanism is different from the jacket position adjusting mechanism 10 according to the first embodiment.

  Therefore, in the description of the jacket position adjusting mechanism 60 according to the second embodiment, the description will be mainly given of the temporary fixing mechanism, and the reference numerals attached in the description of the jacket position adjusting mechanism 10 according to the first embodiment. In principle, the same reference numerals are used for the same objects, and the description is omitted in principle. Similarly to the jacket position adjusting mechanism 10 according to the first embodiment, the jacket position adjusting mechanism 60 according to the second embodiment of the present invention can further include a suction hose 16, but the second embodiment. In FIG. 16 to FIG. 19 used for explaining the jacket position adjusting mechanism 60 according to the above, illustration of the suction hose 16 and its attachment member is omitted.

  FIG. 16 is a vertical sectional view schematically showing the jacket position adjusting mechanism 60 according to the second embodiment.

  The jacket position adjusting mechanism 60 according to the second embodiment includes a temporary fixing mechanism 62 and a height position adjusting device 14.

  The jacket 70 to which the jacket position adjusting mechanism 60 according to the second embodiment is applied is temporarily fixed to the jacket position adjusting mechanism 60 until the jacket 70 is installed at a predetermined point on the bottom 120 and the temporary fixing to the suction foundation 32 is released. The mechanism 62 is temporarily fixed to the suction base 32. In a state where the leg 72 of the jacket 70 is inserted into the coupling sheath pipe 32 of the suction foundation 32, the leg 72 of the jacket 70 is connected to the coupling sheath pipe 35 of the suction foundation 32 by the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60. In the present application, a temporarily fixed structure that is in a state before being installed on the water bottom 120 and releasing the initial temporary fixation is referred to as a floor-type foundation temporary fixing body 63 (FIGS. 16 and 17). Reference).

  The temporary fixing mechanism 62 includes a connecting sheath tube 35 provided with a steady-prevention hole 35A, a connecting rod 64, a bracket 66 attached to the outer peripheral surface of the leg 72, and an outer peripheral surface of the connecting sheath tube 35. An attached metal receiving piece 68 and a leg 72 are provided.

  As shown in FIG. 16, the connecting sheath tube 35 is provided with an anti-sway hole 35 </ b> A at the upper and lower portions of the connecting sheath tube 35. Moreover, eight anti-rest holes 35A are provided so as to be equally divided in the circumferential direction at each height position. The inner peripheral surface of the anti-rest hole 35A is threaded, and a bolt 62A that is threaded on the outer peripheral surface can be screwed in. The bolt 62A is only screwed into the steady-preventing hole 35A and pressed against the leg 72, and is intended to prevent steadying during temporary fixing.

  Unlike the leg 42 of the jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied, the leg 72 is not provided with a long hole 42C for temporary fixing. Unlike the leg 42 of the jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied, the lower end portion of the leg 72 is not filled with the grout material 12A.

  The connecting rod 64 is a member that plays a central role of the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60 according to the second embodiment, and includes a turnbuckle mechanism.

  The connecting rod 64 includes an upper rod 64A, a turnbuckle 64B, and a lower rod 64C. The upper end of the turnbuckle 64B is connected to the lower end of the upper rod 64A, and the lower end of the turnbuckle 64B is connected to the upper end of the lower rod 64C. Since the connecting rod 64 includes the turnbuckle 64B, the total length can be adjusted.

  The upper end portion of the upper rod 64 </ b> A is pin-bonded to a bracket 66 that is connected and fixed to the outer peripheral surface of the leg 72. Further, the lower end portion of the lower rod 64C is hooked and locked to a metal fitting 68 connected and fixed to the outer peripheral surface of the connecting sheath 35, and has a hook structure.

  The lower end portion of the lower rod 64C of the connecting rod 64 is hooked on the metal piece 68, and further the turn buckle 64B is turned to shorten the entire length of the connecting rod 64, thereby connecting the leg 72 of the jacket 70 and the sheath pipe 35 for connecting the suction foundation 32. Can be temporarily fixed. After adjusting the total length of the connecting rod 64 to a predetermined length, a steady-state bolt 62A is screwed into the steady-state hole 35A and pressed against the leg 72 to complete temporary fixing. This temporary fixing is completed for the four legs 72 of the jacket 70, and a structure in which the jacket 70 and the suction foundation 32 are temporarily fixed by the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60 is a landing-type basic temporary fixing. It is a body 63.

  In the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60 according to the second embodiment, the upper end portion of the upper rod 64A is pin-connected to a bracket 66 connected and fixed to the outer peripheral surface of the leg 72, and The lower end portion of the lower rod 64C is hooked and locked by a metal fitting 68 connected and fixed to the outer peripheral surface of the connecting sheath 35. It may be reversed. That is, the upper end portion of the upper rod 64A is hooked and locked to a metal fitting connected and fixed to the outer peripheral surface of the leg 72 so that the upper end portion of the upper rod 64A has a hook structure. The lower end portion may be pin-joined to a bracket that is connected and fixed to the outer periphery of the connecting sheath 35.

  Further, in the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60 according to the second embodiment, the upper end portion of the upper rod 64A is pin-joined to the bracket 66 connected and fixed to the outer peripheral surface of the leg 72. If safety can be confirmed, the upper end portion of the upper rod 64A is also hooked in the same manner as the lower end portion of the lower rod 64C so that it can be hooked and locked by a metal fitting connected and fixed to the outer peripheral surface of the leg 72. Good. That is, if safety can be confirmed, both the upper end portion of the upper rod 64A and the lower end portion of the lower rod 64C may have a hook structure.

(2-2) Jacket position adjustment method using jacket position adjustment mechanism 60 according to the second embodiment When adjusting the jacket position using the jacket position adjustment mechanism 60 according to the second embodiment, for example, the following ( 2a) to (2g).

(2a) Step of making the landing-type foundation temporary fixing body 63 The height position adjusting device 14 is attached to the lower surface of the leg bottom plate 72B of the leg 72, and the height position is provided inside the leg 72 so as to follow the substantially longitudinal direction of the leg 72. The adjusting device piping 14A is disposed.

  The distance between the upper surface 32A of the suction foundation 32 and the leg bottom plate 72B of the leg 72 at the time of initial temporary fixing (at the time of temporary fixing until the landing-type basic temporary fixing body 63 is installed on the water bottom 120) is determined, The pedestal 18 having a corresponding height is arranged at a position inside the connecting sheath pipe 35 and on the upper surface 32 </ b> A of the suction foundation 32. The material and shape of the pedestal 18 are not particularly limited as long as the load applied from the leg 72 can be supported, but the height position adjusting device 14 is between the upper surface 32A of the suction foundation 32 and the leg bottom plate 72B of the leg 72. Therefore, the base 18 is required to have a shape that does not interfere with the height position adjusting device 14, and the base 18 is required to be disposed at a position that does not interfere with the height position adjusting device 14.

  After the pedestal 18 having a predetermined shape is arranged at a predetermined position, the leg 72 of the jacket 70 is arranged in the coupling sheath 35 of the suction foundation 32 as shown in FIG. The pedestal 18 is not disposed at a position inside the coupling sheath 35 but is attached to the lower surface of the leg bottom plate 72B of the leg 72, and the leg 72 of the jacket 70 is used for coupling the suction foundation 32 in this state. You may make it arrange | position in the sheath pipe | tube 35. FIG.

  After the leg 72 of the jacket 70 is arranged in the connecting sheath pipe 35, the lower end portion of the lower rod 64C of the connecting rod 64 is hooked on the metal fitting 68, and the turnbuckle 64B is further turned to shorten the entire length of the connecting rod 64. Thus, the leg 72 of the jacket 70 and the sheathing pipe 32 for connecting the suction foundation 32 are temporarily fixed. After adjusting the total length of the connecting rod 64 to a predetermined length, the bolt 62A for steadying is screwed into the hole 35A for steadying and pressed against the leg 72 to complete the temporary fixing. The body 63 is completed.

(2b) Sedimentation step The landing-type foundation temporary fixing body 63 is transported to the installation point, and is sunk at a predetermined point on the bottom 120. At the time of laying, the suction hose 16 is opened and the laying speed is controlled so that excessive buoyancy due to the air in the skirt of the suction foundation 32 does not act on the temporary fixing portion.

(2c) Suction process When the suction foundation 32 is installed on the bottom 120, water inside the suction foundation 32 is drained using the suction hose 16, and the suction foundation 32 is removed by the suction force generated by the water pressure difference between the inside and outside of the suction foundation 32. Install on bottom 120. FIG. 17 is a vertical cross-sectional view of one leg 72 schematically showing the state after the suction foundation 32 of the landing-type foundation temporary fixing body 63 is installed on the water bottom 120.

  Since the jacket 70 and the suction foundation 32 are temporarily fixed by the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60, the four suction foundations 32 are installed on the water bottom 120 at the same time, so that a plurality of templates can be used without using a template (template). The installation state of the (four) suction foundations 32 (installation positions of the four suction foundations 32 and the verticality of the four suction foundations 32) can be managed with high accuracy.

(2d) Temporary fixing release step Turn the turnbuckle 64B of the connecting rod 64 used for temporary fixing to extend the entire length of the connecting rod 64, and release the temporary fixing by loosening the steadying bolt 62A. The leg 72 is made movable in the vertical direction.

(2e) Leg height adjustment step After the temporary fixation is released in the temporary fixation release step, the height position is adjusted for each leg 72 by the height position adjustment device 14. By adjusting the height position for each leg 72 with the height position adjusting device 14, the level of the joining flange surface at the upper end of the foundation can be managed with higher accuracy than when adjusting with the penetration amount of the suction foundation 32. . FIG. 18 is a vertical sectional view of one leg 72 schematically showing a state in which the height position has been adjusted after the temporary fixing is released.

(2f) Re-temporary fixing step In the state where the position of the leg 72 after the adjustment of the height position is maintained, the turnbuckle 64B is turned to shorten the total length of the connecting rod 64, so that as shown in FIG. The leg 72 of 70 and the coupling sheath 32 of the suction foundation 32 are temporarily fixed again. Then, the steadying bolt 62A is screwed into the steadying hole 35A and pressed against the leg 72, thereby completing the temporary fixing again as shown in FIG.

  Even if the temporary fixing is not performed again, the position of the leg 72 whose height has been adjusted can be maintained well, and the cement 70 is cemented until the cement grout 21 is solidified in the next integration step. If there is no fear of causing fluctuations that adversely affect the joint strength of the grout 21, the re-temporary fixing step may not be performed.

(2g) Integration step As shown in FIG. 19, the cement grout 21 is filled between the connecting sheath pipe 35 and the leg 72 and solidified in the above-described temporary fixing state, and then the connecting sheath pipe is used. 35 and the leg 72 are integrated and fixed. FIG. 19 is a vertical cross-sectional view of one leg 72 schematically showing a state after cement grout 21 is filled between the connecting sheath pipe 35 and the leg 72 after temporary fixing again. As the cement grout 21, cement milk, mortar or the like can be used.

(Supplementary information)
The reason for re-temporary fixing in the re-temporary fixing step is to prevent the jacket 70 from being shaken before the cement grout 21 is hardened in the integration step. If the fluctuation of the jacket 70 generated until the cement grout 21 is hardened is large, sufficient bonding strength of the cement grout 21 cannot be obtained.

  In addition, the strength of temporary fixing is the strength of the cement grout 21 to be filled after each construction step (when lifting the grounding-type foundation temporary fixing body 63, when sinking to the bottom 120, penetrating the suction into the bottom 120, and adjusting the height). It has a strength capable of resisting the load acting on the temporarily fixed part during the period until the onset.

  In addition, the integration of the connecting sheath tube 35 and the leg 72 in the integration step may be performed by a method other than the filling of the grout material. But you can.

(2-3) Effect of Jacket Position Adjustment Mechanism 60 According to Second Embodiment By using the temporary fixing mechanism 62 of the jacket position adjustment mechanism 60, four suctions are performed while the jacket 70 and the suction base 32 are temporarily fixed. The foundation 32 can be installed on the bottom 120 at the same time. For this reason, even if it does not use a template (template), the installation state (installation position of the four suction foundations 32 and the perpendicularity of the four suction foundations 32) is managed accurately. be able to.

  Further, after the four suction foundations 32 are installed on the water bottom 120 and the temporary fixing by the temporary fixing mechanism 62 is released, the height position of the jacket position adjusting mechanism 60 is set so that each leg 72 has a target height position. The height position can be adjusted for each leg 72 by the adjusting device 14. For this reason, by using the jacket position adjusting mechanism 60, the level of the joining flange surface at the upper end of the landing base (the upper end of the jacket 70) is more accurately managed than when the penetration amount of the suction foundation 32 is adjusted. be able to.

(3) Third Embodiment (3-1) Configuration of Jacket Position Adjustment Mechanism 80 According to Third Embodiment A jacket position adjustment mechanism 80 according to a third embodiment of the present invention is a sand jack 84 as a height position adjustment device. This is a major difference between the jacket position adjusting mechanism 10 according to the first embodiment and the jacket position adjusting mechanism 60 according to the second embodiment. The temporary fixing mechanism is also different from the jacket position adjusting mechanism 10 according to the first embodiment and the jacket position adjusting mechanism 60 according to the second embodiment.

  In the description of the jacket position adjusting mechanism 80 according to the third embodiment, the same reference numerals as those used in the description of the jacket position adjusting mechanism 10 according to the first embodiment or the jacket position adjusting mechanism 60 according to the second embodiment are used. In principle, the same reference numerals are used for the objects, and the description is omitted in principle. Similarly to the jacket position adjusting mechanism 10 according to the first embodiment and the jacket position adjusting mechanism 60 according to the second embodiment, the jacket position adjusting mechanism 80 according to the third embodiment further includes a suction hose 16. In FIG. 20 to FIG. 23 used for explaining the jacket position adjusting mechanism 80 according to the third embodiment, the suction hose 16 and its attachment member are not shown.

  FIG. 20 is a vertical sectional view schematically showing a jacket position adjusting mechanism 80 according to the third embodiment.

  The jacket position adjusting mechanism 80 according to the third embodiment includes a temporary fixing mechanism 82 and a sand jack 84.

  The sand jack 84 is disposed below the leg bottom plate 73A of the leg 73 of the jacket 71, is disposed inside the connecting sheath tube 88, and adjusts the height position of the leg 73 after temporary fixing is released. It is.

  The main body of the sand jack 84 is formed by stuffing sand into a bag body 84A using a non-water-permeable material such as rubber. The sand jack 84 also serves as the pedestal 18 in the first and second embodiments. Also serves as.

  The sand jack 84 includes an injection pipe 84B and a discharge pipe 84C. The injection tube 84 </ b> B and the discharge tube 84 </ b> C are inserted through the sand jack hole 88 </ b> B of the connecting sheath tube 88, and the inside of the bag body 84 </ b> A of the sand jack 84 is communicated with the outside of the connecting sheath tube 88.

  The injection pipe 84B is provided to encourage the sand inside the bag body 84A of the sand jack 84 to be discharged to the outside. Specifically, high-pressure water or the like can be jetted into the bag body 84A of the sand jack 84 through the injection pipe 84B, and the sand inside the bag body 84A of the sand jack 84 is discharged to the outside. Has a role to encourage. 20 to 23, illustration of piping, valves, and the like connected to the injection pipe 84B for injecting high-pressure water or the like into the bag body 84A is omitted.

  The discharge pipe 84C is provided to discharge the sand inside the bag body 84A of the sand jack 84 to the outside, and the sand inside the bag body 84A of the sand jack 84 is discharged to the outside through the discharge pipe 84C. 20 to 23, the valve, plug, etc. connected to the discharge pipe 84C to control the discharge of sand inside the bag body 84A by closing and opening the discharge pipe 84C are not shown. Omitted.

  When the sand inside the bag body 84A of the sand jack 84 is discharged to the outside, the height of the main body portion of the sand jack 84 is lowered, and the leg 73 positioned on the upper portion of the main body portion of the sand jack 84 is lowered downward. Moving. That is, the adjustment of the height position of the leg 73 by the sand jack 84 can be performed only by moving the leg 73 downward, and the adjustment of the height position of the leg 73 by the sand jack 84 is jackdown.

  In the third embodiment, the sand inside the bag body 84A of the sand jack 84 is discharged to the outside using the injection pipe 84B and the discharge pipe 84C, but the bag body 84A of the sand jack 84 is used. The method of discharging the sand inside the bag to the outside is not limited to this method, and any method can appropriately manage the discharge amount of the sand inside the bag body 84A to the outside. It may replace with the method of using the pipe | tube 84C, and may be used.

  Further, as described above, when the sand inside the bag body 84A of the sand jack 84 is discharged to the outside, the height of the main body portion of the sand jack 84 is lowered. Therefore, the injection pipe 84B and the discharge pipe 84C need to be able to maintain their functions even when the height of the main body portion of the sand jack 84 is lowered.

  In order to maintain the functions of the injection tube 84B and the discharge tube 84C even when the height of the main body portion of the sand jack 84 is lowered, the injection tube 84B and the discharge tube 84C are formed of extendable tubes. Is one idea. It is also a proposal to provide a non-deformable portion on the lower end side of the main body portion of the sand jack 84 and connect the injection tube 84B and the discharge tube 84C to the non-deformed portion.

  The jacket 71 to which the jacket position adjusting mechanism 80 according to the third embodiment is applied is temporarily fixed to the jacket position adjusting mechanism 80 until it is installed at a predetermined point on the bottom 120 and the temporary fixing to the suction foundation 32 is released. The mechanism 82 is temporarily fixed to the suction foundation 32. In a state where the leg 73 of the jacket 71 is inserted into the connection sheath pipe 88 of the suction foundation 32, the leg 73 of the jacket 71 is connected to the connection sheath pipe 88 of the suction foundation 32 by the temporary fixing mechanism 82 of the jacket position adjusting mechanism 80. In the present application, a temporarily fixed structure that is in a state before being installed on the bottom 120 and releasing the initial temporary fixation is referred to as a floor-type foundation temporary fixing body 86 (FIGS. 20 and 21). Reference).

  The temporary fixing mechanism 82 includes a connecting sheath pipe 88 provided with a steady-prevention hole 88A and a sandjack hole 88B, a connecting wire 90, a bracket 92 attached to the outer peripheral surface of the leg 73, and a suction foundation. 32, a bracket 94 attached to the upper surface 32A of the 32, and a leg 73.

  As shown in FIG. 20, the connecting sheath tube 88 is provided with an anti-swaying hole 88 </ b> A in the upper and lower portions of the connecting sheath tube 88. In addition, at each height position, eight steadying holes 88A are provided so as to be equally divided in the circumferential direction. The inner peripheral surface of the steady stop hole 88A is threaded, and a bolt 82A that is threaded on the outer peripheral surface can be screwed in. The bolt 82A is only screwed into the steady-prevention hole 88A and pressed against the leg 73, and is intended to prevent steadying during temporary fixing.

  Unlike the leg 42 of the jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied, the leg 73 is not provided with a long hole 42C for temporary fixing. Further, unlike the leg 42 of the jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied, the lower end portion of the leg 73 is not filled with the grout material 12A.

  The connecting wire 90 is a member that plays a central role in the temporary fixing mechanism 82 of the jacket position adjusting mechanism 80 according to the third embodiment, and includes a turnbuckle mechanism as a tensioning mechanism. And a buckle 90B.

  90 A of upper wires should just be a linear member which can endure the tension | tensile_strength required for temporary fixing, for example, a chain, a fiber sling, etc. can be used.

  The upper end of the turnbuckle 90B is connected to the lower end of the upper wire 90A, and the lower end of the turnbuckle 90B is connected to a bracket 94 attached to the upper surface 32A of the suction base 32. Since the connecting wire 90 includes the turnbuckle 90B, the total length can be adjusted.

  The upper end portion of the upper wire 90 </ b> A is pin-bonded to a bracket 92 that is connected and fixed to the outer peripheral surface of the leg 73. The lower end of the turnbuckle 90B is pin-joined to a bracket 94 attached to the upper surface 32A of the suction foundation 32.

  Temporarily fixing the leg 73 of the jacket 71 and the suction foundation 32 by shrinking the entire length of the connecting wire 90 whose upper end is pin-joined to the bracket 92 and whose lower end is pin-joined to the bracket 94 using the turnbuckle 90B. Can do. After adjusting the total length of the connecting wire 90 to a predetermined length, a steady-state bolt 82A is screwed into the steady-state hole 88A and pressed against the leg 73 to complete temporary fixing. This temporary fixing is completed for the four legs 73 of the jacket 71, and a structure in which the jacket 71 and the suction foundation 32 are temporarily fixed by the temporary fixing mechanism 82 of the jacket position adjusting mechanism 80 is a landing-type basic temporary fixing. It is a body 86.

  The connecting wire 90 includes the turnbuckle 90B as a tension mechanism. However, if the construction can be performed in water, the tension mechanism may not be the turnbuckle 90B. For example, a lever block (registered) may be used instead of the turnbuckle 90B. Trademark) can also be used as a tensioning mechanism.

  In the jacket position adjusting mechanism 80 according to the third embodiment, a mechanism other than the temporary fixing mechanism 82 (temporary fixing mechanism using the connecting wire 90) can be used as the temporary fixing mechanism. For example, the temporary fixing mechanism 12 of the jacket position adjusting mechanism 10 according to the first embodiment may be used, or the temporary fixing mechanism 62 of the jacket position adjusting mechanism 60 according to the second embodiment may be used.

(3-2) Jacket position adjustment method using jacket position adjustment mechanism 80 according to the third embodiment When adjusting the jacket position using the jacket position adjustment mechanism 80 according to the third embodiment, for example, the following ( It can carry out like the procedure of 3a)-(3g).

(3a) Step of making the landing-type foundation temporary fixing body 86 At the time of initial temporary fixing between the upper surface 32A of the suction foundation 32 and the leg bottom plate 73A of the leg 73 (until the installation-type foundation temporary fixing body 86 is installed on the bottom 120) And a sand jack 84 having a height corresponding to the distance is arranged in a position inside the connecting sheath 88 and on the upper surface 32A of the suction foundation 32. .

  After the sand jack 84 is disposed at a predetermined position, as shown in FIG. 20, the leg 73 of the jacket 71 is disposed in the connection sheath of the suction foundation 32.

  After the leg 73 of the jacket 71 is arranged in the connecting sheath tube 88, the connecting wire 90 is attached so that both ends are pin-connected to the brackets 92 and 94. Then, the leg 73 of the jacket 71 and the suction foundation 32 are temporarily fixed by turning the turnbuckle 90B to shorten the entire length of the connecting wire 90. After adjusting the total length of the connecting wire 90 to a predetermined length, the bolt 82A for steadying is screwed into the hole 88A for steadying and pressed against the leg 73 to complete the temporary fixing, thereby temporarily fixing the landing-type foundation Complete the body 86.

(3b) Sedimentation step The grounded foundation temporary fixing body 86 is transported to the installation point, and is sunk at a predetermined point on the bottom 120. At the time of laying, the suction hose 16 is opened and the laying speed is controlled so that excessive buoyancy due to the air in the skirt of the suction foundation 32 does not act on the temporary fixing portion.

(3c) Suction process When the suction foundation 32 is installed on the bottom 120, water inside the suction foundation 32 is drained using the suction hose 16, and the suction foundation 32 is removed by the suction force generated by the water pressure difference between the inside and outside of the suction foundation 32. Install on bottom 120. FIG. 21 is a vertical cross-sectional view of one leg 73 schematically showing a state after the suction foundation 32 of the landing-type foundation temporary fixing body 86 is installed on the water bottom 120.

  With the jacket 71 and the suction foundation 32 being temporarily fixed by the temporary fixing mechanism 82 of the jacket position adjusting mechanism 80, the four suction foundations 32 are simultaneously installed on the bottom 120, so that a plurality of templates can be used without using a template (template). The installation state of the (four) suction foundations 32 (installation positions of the four suction foundations 32 and the verticality of the four suction foundations 32) can be managed with high accuracy.

(3d) Temporary fixing release step Temporary fixing is released by loosening the bolt 82A for steadying. The adjustment of the height position of the leg 73 by the jacket position adjustment mechanism 80 according to the third embodiment is an adjustment by jackdown. When the height position of the leg 73 is adjusted, the connecting wire 90 naturally loosens. In the jacket position adjusting method using the jacket position adjusting mechanism 80 according to the third embodiment, the temporary fixing can be released simply by loosening the steady-state bolt 82A.

(3e) Leg height adjustment step After the temporary fixation is released in the temporary fixation release step, the height position of each leg 73 is adjusted by the sand jack 84. By adjusting the height position of each leg 73 with the sand jack 84, the level of the joining flange surface at the upper end of the foundation can be managed with higher accuracy than when adjusting with the penetration amount of the suction foundation 32. FIG. 22 is a vertical cross-sectional view of one leg 73 schematically showing a state in which the height position has been adjusted.

(3f) Re-temporary fixing step In the state where the position of the leg 73 after the adjustment of the height position is maintained, the turnbuckle 90B is turned to shorten the total length of the connecting wire 90, so that as shown in FIG. The leg 73 of 71 and the suction foundation 32 are temporarily fixed again. Then, the steady-state bolt 82A is screwed into the steady-state hole 88A and pressed against the leg 73 to complete the temporary fixing again as shown in FIG.

  Even if the temporary fixing is not performed again, the position of the leg 73 whose height position has been adjusted can be maintained well, and the cement 71 is cemented to the jacket 71 until the cement grout 21 is solidified in the next integration step. If there is no fear of causing fluctuations that adversely affect the joint strength of the grout 21, the re-temporary fixing step may not be performed.

(3g) Integration step As shown in FIG. 23, the cement grout 21 is filled between the connecting sheath tube 88 and the leg 73 and solidified in the above-described temporary fixing state, and then the connecting sheath tube. 88 and the leg 73 are integrated and fixed in place. FIG. 23 is a vertical sectional view of one leg 73 schematically showing a state after the cement grout 21 is filled between the connecting sheath tube 88 and the leg 73 after temporary fixing again. As the cement grout 21, cement milk, mortar or the like can be used.

(Supplementary information)
The reason for re-temporary fixing in the re-temporary fixing process is to prevent the jacket 71 from being shaken before the cement grout 21 is hardened in the integration process. If the swing of the jacket 71 generated until the cement grout 21 is hardened is large, sufficient bonding strength of the cement grout 21 cannot be obtained.

  In addition, the strength of the temporary fixing is determined by the strength of the cement grout 21 to be filled after each construction step (when the landing-type foundation temporary fixing body 86 is lifted, when it is laid on the bottom 120, when the suction is inserted into the bottom 120, and after height adjustment). It has a strength capable of resisting the load acting on the temporarily fixed part during the period until the onset.

  In addition, the integration of the connecting sheath tube 88 and the leg 73 in the integration step may be performed by a method other than the filling of the grout material. But you can.

(3-3) Effect of Jacket Position Adjusting Mechanism 80 According to Third Embodiment By using temporary fixing mechanism 82 of jacket position adjusting mechanism 80, four suctions are performed in a state where jacket 71 and suction base 32 are temporarily fixed. The foundation 32 can be installed on the bottom 120 at the same time. For this reason, even if it does not use a template (template), the installation state (installation position of the four suction foundations 32 and the perpendicularity of the four suction foundations 32) is managed accurately. be able to.

  Further, after the four suction foundations 32 are installed on the water bottom 120 and the temporary fixing by the temporary fixing mechanism 82 is released, the sand jack 84 of the jacket position adjusting mechanism 80 is set so as to reach the target height position for each leg 73. Thus, the height position can be adjusted for each leg 73. For this reason, by using the jacket position adjusting mechanism 80, the level of the joining flange surface at the upper end of the floor foundation (the upper end of the jacket 71) is managed with higher accuracy than when the penetration amount of the suction foundation 32 is adjusted. be able to.

  Further, in the jacket position adjustment method using the jacket position adjustment mechanism 80 according to the third embodiment, the temporary fixing can be released simply by loosening the steady-state bolt 82A. Since the connection wire 90 that has been loosened in the leg height adjustment step is re-tensioned and the bolt 82A for steadying is only tightened, the re-temporary fixing step that is an underwater operation can be simplified. .

(4) Number of suction foundations, connecting sheath pipes and legs The four suction foundations 32 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied are provided with connecting sheath pipes 34, respectively, and in the second embodiment. The four suction foundations 32 to which the jacket position adjusting mechanism 60 is applied are each provided with a connecting sheath pipe 35, and the four suction foundations 32 to which the jacket position adjusting mechanism 80 according to the third embodiment is applied are connecting sheath pipes. The jacket 40 to which the jacket position adjusting mechanism 10 according to the first embodiment is applied includes four legs 42, and the jacket 70 to which the jacket position adjusting mechanism 60 according to the second embodiment is applied is a leg 72. The jacket 71 to which the jacket position adjusting mechanism 80 according to the third embodiment is applied has four legs 73. However, the number of suction foundations, the number of connecting sheaths and the number of jacket legs and the number of jacket legs to which the jacket position adjusting mechanism according to the present invention is applied is not limited to four, ensuring safety. Any number can be selected within a possible range.

DESCRIPTION OF SYMBOLS 10, 60, 80 ... Jacket position adjustment mechanism 12, 62, 82 ... Temporary fixing mechanism 12A ... Grout material 12B ... Rod-shaped member 14 ... Height position adjustment device 14A ... Height position adjustment device piping 16 ... Suction hose 16A ... Main-body part 16B, 16B1, 16B2 ... telescopic part 16C ... lower end part 16D, 16E ... flange 18 ... pedestal 20, 21 ... cement grout 30 ... landing foundation 32 ... suction foundation 32A ... upper surface 32B ... through hole 34, 35, 88 ... connection Saddle tube 34A ... Temporary fixing hole 34B ... Spacer 35A, 88A ... Stabilization hole 36, 63, 86 ... Implantable foundation temporary fixing body 40, 70, 71 ... Jacket 42, 72, 73 ... Leg 42A ... Vertical parts 42B, 72B, 73A ... Leg bottom plate 42C ... Long hole for temporary fixing 42D ... Grout material filling part 42E ... Through hole 44 ... Brace 46 ... Reinforcement horizontal member 48 ... Joint 48A ... Connecting steel pipe 48B ... Upper flange 48C ... Lower flange 48D ... Web 50 ... Bracket 62A, 82A ... Bolt 64 ... Connecting rod 64A ... Upper rod 64B ... Turnbuckle 64C ... Lower rod 66, 92, 94 ... Bracket 68 ... Receiving hardware 84 ... Sand jack 84A ... Bag body 84B ... Injection tube 84C ... Discharge tube 88B ... Hole for sand jack 90 ... Connecting wire 90A ... Upper wire 90B ... Turnbuckle 100 ... Offshore windmill 102 ... Windmill body 104 ... Windmill tower 106 ... Hub 108 ... Blade 120 ... Water bottom

Claims (20)

A jacket position adjusting mechanism for adjusting a position of the jacket of a flooring type foundation having a plurality of suction foundations and a jacket attached to the plurality of suction foundations;
The plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at least at the top,
The jacket has a plurality of legs extending downward;
The plurality of legs are respectively inserted into the corresponding connecting sheath pipes,
The jacket position adjusting mechanism is
A temporary fixing mechanism for temporarily fixing the connecting sheath tube and the leg inserted into the connecting sheath tube;
A height position adjusting mechanism for adjusting the height position of each of the plurality of legs;
A jacket position adjusting mechanism characterized by comprising:   2. The jacket according to claim 1, wherein the height position adjusting mechanism is disposed between a lower end of the leg and the suction foundation, and is disposed inside the connecting sheath pipe. Position adjustment mechanism.   The jacket position adjusting mechanism according to claim 2, wherein there are a plurality of the height position adjusting mechanisms, and each of the height position adjusting mechanisms is arranged at a lower end of each of the plurality of legs.   The jacket position adjusting mechanism according to claim 1, wherein the height position adjusting mechanism is an air jack or a water jack.   The jacket position adjusting mechanism according to claim 1, wherein the height position adjusting mechanism is a sand jack. The jacket position adjusting mechanism further includes a suction hose,
Outside the leg, the suction hose is arranged in the longitudinal direction of the leg along the outer peripheral surface of the leg, and the tip of the suction hose reaches the inside of the suction foundation. The suction hose communicates with the inside of the suction foundation, and the suction hose is attached to the leg via a bracket attached to an outer peripheral surface of the leg, and the bracket at the lowest position of the bracket and the bracket The jacket position adjusting mechanism according to any one of claims 1 to 5, wherein at least a part of the portion of the suction hose positioned between the upper surface of the suction foundation is extendable. Each of the plurality of legs is filled with a grout material at the lower end,
The lower end of the leg filled with the grout material and the connecting sheath tube are provided with holes for temporary fixing at corresponding positions, respectively.
The temporary fixing mechanism is
The leg provided with the hole for temporary fixing at the lower end,
The grout material filled in the lower end of the leg;
The connecting sheath tube provided with the temporary fixing hole;
A rod-like member that passes through the temporary fixing hole of the connecting sheath tube and the temporary fixing hole of the leg;
The jacket position adjusting mechanism according to any one of claims 1 to 6, further comprising:   There are a plurality of the temporary fixing holes of the connecting sheath tube provided at different positions in the circumferential direction of the connecting sheath tube, and there are a plurality of the temporary fixing holes of the leg and the circumference of the leg. The jacket position adjusting mechanism according to claim 7, wherein the jacket position adjusting mechanism is provided at different positions in the direction.   The plurality of temporary fixing holes of the connecting sheath pipe are provided at different positions in the height direction of the connecting sheath pipe, and the plurality of temporary fixing holes of the leg are provided on the leg. The jacket position adjusting mechanism according to claim 8, wherein the jacket position adjusting mechanism is provided at different positions in the height direction.   The plurality of temporary fixing holes of the connecting sheath tube are provided at two different height positions, each at a position that divides the connecting sheath tube approximately equally in the circumferential direction, The plurality of temporary fixing holes of the leg are provided at eight different positions at two different height positions, respectively, at positions where the leg is substantially equally divided in the circumferential direction. The jacket position adjustment mechanism described.   The inner peripheral surface of the temporary fixing hole of the connecting sheath tube is threaded, and the outer peripheral surface of the rod-shaped member is also the inner peripheral surface of the temporary fixing hole of the connecting sheath tube. The jacket position adjusting mechanism according to any one of claims 7 to 10, wherein the threading process is performed so as to correspond to the threading process, and the tip of the rod-shaped member is processed in a conical shape. .   The jacket position adjusting mechanism according to claim 7, wherein the temporary fixing hole of the leg is a long hole that is long in a height direction. The temporary fixing mechanism is a connecting rod whose length can be adjusted,
The one end of the connecting rod is connected to the outer peripheral surface of the leg, and the other end of the connecting rod is connected to the outer peripheral surface of the connecting sheath tube. The jacket position adjusting mechanism according to any one of the above.   The jacket position adjusting mechanism according to claim 13, wherein at least one of the one end or the other end of the connecting rod has a hook structure.   The one end of the connecting rod is pin-joined with a bracket connected to the outer peripheral surface of the leg, and the other end of the connecting rod has a hook structure. The jacket position adjusting mechanism described in 1.   The one end of the connecting rod has a hook structure, and the other end of the connecting rod is pin-joined with a bracket connected to an outer peripheral surface of the connecting sheath. The jacket position adjusting mechanism according to claim 13.   The jacket position adjusting mechanism according to any one of claims 13 to 16, wherein the connecting rod includes a turnbuckle mechanism. A construction method for constructing a floor foundation having a plurality of suction foundations and a jacket attached to the plurality of suction foundations,
The plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at least at the top,
The jacket has a plurality of legs extending downward;
The plurality of legs are respectively inserted into the corresponding connecting sheath pipes,
The jacket position adjusting mechanism comprising: the plurality of suction foundations, the jacket, and the jacket position adjusting mechanism according to any one of claims 1 to 17, which adjusts the position of the jacket of the landing base. A laying step of laying a grounding-type foundation temporary fixing body in which the connecting sheath tube and the leg inserted into the connecting sheath tube are temporarily fixed by the temporary fixing mechanism on the water bottom ground;
Draining the water inside the plurality of suction foundations of the landing-type foundation temporary fixed body set on the bottom ground in the settling step, and installing the plurality of suction foundations on the bottom ground; and
A temporary fixing releasing step of releasing the temporary fixing of the temporary fixing mechanism of the jacket position adjusting mechanism to enable relative movement between the connecting sheath and the leg inserted into the connecting sheath; ,
Leg height adjustment step of adjusting the height position of the leg by moving the leg relative to the connecting sheath into which the leg is inserted in the substantially vertical direction with the height position adjusting mechanism. When,
An integration step of integrating the leg whose height position has been adjusted in the leg height adjustment step and the connecting sheath pipe into which the leg is inserted, and Construction method. A construction method for constructing a floor foundation having a plurality of suction foundations and a jacket attached to the plurality of suction foundations,
The plurality of suction foundations are each integrally provided with a connecting sheath tube having an inner space that is open at least at the top,
The jacket has a plurality of legs extending downward;
The plurality of legs are respectively inserted into the corresponding connecting sheath pipes,
The jacket position adjusting mechanism comprising: the plurality of suction foundations, the jacket, and the jacket position adjusting mechanism according to any one of claims 1 to 17, which adjusts the position of the jacket of the landing base. A laying step of laying a grounding-type foundation temporary fixing body in which the connecting sheath tube and the leg inserted into the connecting sheath tube are temporarily fixed by the temporary fixing mechanism on the water bottom ground;
Draining the water inside the plurality of suction foundations of the landing-type foundation temporary fixed body set on the bottom ground in the settling step, and installing the plurality of suction foundations on the bottom ground; and
A temporary fixing releasing step of releasing the temporary fixing of the temporary fixing mechanism of the jacket position adjusting mechanism to enable relative movement between the connecting sheath and the leg inserted into the connecting sheath; ,
Leg height adjustment step of adjusting the height position of the leg by moving the leg relative to the connecting sheath into which the leg is inserted in the substantially vertical direction with the height position adjusting mechanism. When,
A re-temporary fixing step of temporarily fixing the leg whose height position in the leg height adjusting step is adjusted to the connecting sheath tube into which the leg is inserted;
An integration step of integrating the leg temporarily fixed in the re-temporary fixing step and the connecting sheath tube into which the leg is inserted, and a method for constructing a landing-type foundation.   20. The landing method according to claim 18 or 19, wherein in the integration step, a grout material is filled and integrated between the leg and the connecting sheath tube into which the leg is inserted. How to build the foundation.