JP2017114266A - Floating facility construction method, floating facility maintenance method and floating facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To build a floating body equipment, a tank can be provided in the floating body structure of the floating body equipment even after a part or all of the topside module is mounted on the floating body structure of the floating body equipment. The present invention provides a method for constructing a floating body facility, which enables the construction and modification work of a floating body structure having a tank as a storage facility to be carried out in parallel. SOLUTION: In the method for constructing the floating body equipment, which has the storage equipment 17 including the tank 17a and the top side 20, and comprises the tank 17a in the internal space A of the floating body structure 10, the tank 17a is independent. The tank 17a is configured by a tank that can be moved by moving the tank 17a horizontally, from the quay where the tank 17a is arranged, or from the carrier platform where the tank 17a is mounted. 17 a is moved to the internal space A of the floating structure 10. [Selection diagram] Figure 1

Description

  The present invention relates to a floating body construction method called FPSO or FLNG, a floating body maintenance method, and a floating body structure of the floating body, and more particularly, a top side module is mounted on the floating body structure of the floating body. The present invention relates to a construction method for a floating body facility, a maintenance method for the floating body facility, and a floating body facility in which tanks can be easily provided even afterward.

  Floating body called FPSO (Floating Production, Storage, Offloading), which is used as a facility for producing, storing and shipping crude oil and other marine resources from offshore oil fields etc. Forty years have passed since the production and storage facility was invented. In the meantime, nearly 200 units have been built for crude oil production, and one quarter of crude oil demand is being covered.

  The basic structure and construction method of this FPSO is almost completed while several tens of units in the early 10 to 15 years are built, and has hardly changed during the next 25 years. In other words, the crude oil tanker having a rectangular cross section, a high freeboard and a substantially horizontal deck surface is slightly modified to complete a floating structure as a base hull having a crude oil storage function and a residential area function. Next, the crude oil processing facility called the top side is constructed by dividing it into several modules, and the top side module is installed on the deck of the floating structure using a crane ship, or the floating structure. Work to install mooring equipment for mooring. These constructions are often carried out at shipyards in Southeast Asia and East Asia. After that, the style of using a tanker propulsion device or using a tugboat to tow the FPSO to the installation site and connecting it to a mooring line pre-laid there has been almost consistently penetrated. ing.

  The FPSO has been increasing in size, sophistication, and cost, mainly in the top side, over the last 25 years. For example, the average structure of FPSO 25 years ago was a floating tank structure based on a crude oil tanker with a total length of about 260m, the number of topside modules was about 2, and the total weight was less than 1,000 tons. Cost was 10 billion yen or less. On the other hand, in the FPSO constructed recently, the top side part is remarkably enlarged and the number of top side modules is 20 while the floating structure is based on a crude oil tanker with a total length of 330 m. The total weight has reached tens of thousands of tons, and the total cost has reached several hundred billion yen.

  Furthermore, the FPSO system is being applied not only to crude oil but also to the production of natural gas (in this case, it is called “FLNG” instead of “FPSO”). In this case, the total weight and total weight of the top side Costs are expected to double. For this reason, the installation work on the top side requires a large amount of cost and time, and procurement of construction funds during construction before the start of crude oil production is a heavy burden including interest rates.

  Furthermore, as the importance of the top side, cost ratio, and overall cost increase compared to the base tanker that will be the floating structure of the FPSO, maintenance on the floating structure side such as storage facilities will increase. For this reason, when production activities are interrupted, the impact on the entire business is remarkably large, and the occurrence of these situations is a serious problem.

  For example, in a ballast tank provided in a floating structure, corrosion proceeds by being exposed to air for a long time after injecting seawater ballast, and in a crude oil storage tank also provided in a floating structure, Impurities and seawater remaining in crude oil are gradually separated during storage and accumulated at the bottom of the tank, corroded by the propagation of seawater and microorganisms, and oxygen concentration in the space above the oil level is reduced to prevent explosions. Boiler combustion exhaust gas (inert gas: inert gas) is introduced, but it is corroded by sulfur in the combustion exhaust gas.

  In order to respond to this phenomenon such as corrosion, it is necessary to stop using the corresponding tank, ventilate over a period of days, and perform maintenance, but the situation that interrupts this production activity is a business by production activity As a result, the situation has become unacceptable.

  As described above, at present, the situation regarding the floating facilities such as FPSO is the technology for simplifying the mounting work of the top side module to the floating structure and shortening the mounting work period, the mounting work of the top side module, There is a demand for innovation in each technology, such as a technology for constructing and remodeling a floating structure that is a base floating body with storage facilities. In addition, maintenance-free functions are required for the functions of the floating structure centering on storage facilities.

  As a tank system provided in the floating equipment such as FPSO, there are a membrane system, a MOSS system, an independent rectangular tank system, and the like, in addition to a system in which a load is loaded in direct contact with the hull structure. In the membrane system, the tank receives the internal pressure and weight using not only the tank but also the hull, and the tank is built with the hull. In the MOSS system, a spherical tank is constructed independently of the hull structure and mounted on the hull. In the independent rectangular tank system, the tank is constructed independently of the hull structure and mounted on the hull as in the MOSS system, but is not a spherical tank but a square tank.

  This independent rectangular tank type square tank is also called an SBP tank (self-standing square tank), and has a self-supporting structure with a structural member inside, and is more resistant to sloshing than the membrane type. Compared with the MOSS method, a free shape can be formed in accordance with the shape of the hull, the volume efficiency can be increased, and it is used for storing LNG (liquefied natural gas) and the like.

  However, this independent square tank often has a long delivery time, and even if construction begins at the same time as the top side module, the completion of the independent square tank will be slower than when the top side module can be installed. There is. In this case, in the prior art, the tank was installed after the tank was installed in the floating structure of the floating equipment, and the top side module was mounted on this deck. There is a problem that the overall construction period becomes longer due to delay.

  On the other hand, several methods have been proposed for loading superstructures, cargo storage units, tank barges, and the like on a ship with comparative structures. For example, after a trolley loaded with a transport vehicle carrying ultra-heavy equipment that has been operating in the sea area enters the waterway, the waterway is closed and the seawater in the waterway is released to the outside. There is a method of draining the super heavy equipment that passes the ramp way between the trolley and the quay approach road after the bottom, and separates the carriage loaded with super heavy equipment from the trolley and sends it to the quay access road. It has been proposed (see, for example, Patent Document 1).

  In addition, the cargo storage shed is configured by loading a large number of cargoes such as containers. , Loading and unloading or loading cargo storage by moving horizontally the cargo storage warehouse located at the same level as the bottom of the ship toward the cargo landing at the same level as the bottom of the ship A cargo handling method for ships on which work is performed has been proposed (see, for example, Patent Document 2).

  In addition, tank barges of the same size and loaded with liquid cargo have been developed with the aim of enabling efficient and economical freight transportation that meets demand and greatly improving operational convenience. A tank barge transport method has been proposed in which a tank barge is transported by sea using a pusher boat mounted on a low deck tank barge receiving section provided on both sides of a mother barge capable of adjusting flooding (for example, Patent Document 3). reference).

JP 7-137684 A Japanese Patent Laid-Open No. 7-17466 JP 7-277269 A

  The present inventor has made the tank provided in the floating body equipment a tank that can be constructed independently of the floating body structure and can be moved independently, and by further devising it, the above-mentioned super heavy equipment and cargo storage warehouse It is now possible to apply the method of loading heavy objects such as tanks and tank barges to floating structures such as trolleys, ships and mother barges, as well as the method of mounting tanks of floating structures to floating structures of floating structures. Thus, after completing the process of mounting and fixing the tank of the prior art to the floating structure, the order of the process of proceeding to the process of providing the top side on the floating structure by mounting the top side module can be changed. And gained knowledge.

  The present invention has been made in view of the above situation, and its purpose is to construct a floating facility, even after a part or all of the top side module is mounted on the floating structure of the floating facility, Construction of floating equipment that can be installed in the floating structure of the floating equipment, and can be built and modified in parallel with the installation of the topside module and the floating structure with the tank as the storage equipment in the internal space It is to provide a method.

  Another object of the present invention is to provide a maintenance method for a floating equipment that can carry out maintenance of the storage equipment of the floating equipment in a short period of time by unloading the tank that can be moved independently from the floating structure and replacing the tank. There is.

  Moreover, the further objective is to provide the floating body facility which can implement the construction method of these floating body facilities, and the maintenance method of a floating body facility.

  In order to achieve the above object, a method for constructing a floating facility according to the present invention includes: a storage facility including a tank; and a top side; and a floating facility for constructing a floating facility including the tank in an internal space of the floating structure. In the construction method, the tank is configured with a tank that can be moved independently, and the tank is horizontally disposed from a quay where the tank is disposed or from a carrier ship on which the tank is mounted. And moving the tank in the direction to move the tank into the internal space of the floating structure.

  In addition, the floating facilities are not limited to crude oil, and include those that produce submarine mineral resources, renewable energy, and biological resources. Further, the floating body (F) is not necessarily limited to those having all functions of production (P), storage (S), and shipping (O). For example, after the arrival at the installation place on the ocean, the floating body This includes equipment that is installed on the bottom of the equipment, equipment that is mounted on a jacket, and equipment that does not have storage equipment (S) and that does not have production function (P).

  Further, the horizontal movement does not mean that the vertical movement is not included at all, but the horizontal movement amount is larger than the vertical movement amount. It means movement that also includes diagonally below.

  According to this method, the tank is floated by a slide or the like by horizontal movement called skid-on type skidding or horizontal movement called roll-on type loading without using a lifting work on a crane ship or the like. The tank is disposed in the internal space of the floating structure by being moved to the internal space of the structure.

  Therefore, unlike the order of the steps of providing the top side in the floating structure after mounting the tank according to the prior art, the tank mounting step of providing the tank in the internal space of the floating structure of the floating equipment is the It may be after the step of mounting a part or all of the top side module on the floating structure of the above, or after the step of installing the top side, and is a mounting and storage facility for the top side module. Construction and modification of floating structures with tanks can be performed in parallel.

  In other words, the storage facility including a tank that can be moved independently, including an independent rectangular tank with a long delivery time, may reach the floating structure later than the top side module. It is also possible to proceed in parallel with the integration and the construction of providing storage facilities such as tanks in the internal space of the floating structure, and the overall construction period can be shortened. As a result, in order to reduce the borrowing interest rate of construction funds, the purchase of expensive independent rectangular tanks can be delayed and the borrowing period of the funds can be shortened.

  In addition, because the tank is mounted on a rail or the like provided in the internal space of the floating structure, either directly or indirectly via a carriage, etc., by a slide or wheel, the crane in the tank There are no restrictions on the height, width, or length when suspending.

  In the construction method of the floating equipment described above, the step of building the tank on land, the step of mounting the tank on a transport carrier in a horizontal direction, and the tank mounted on the transport boat in a horizontal direction By including the step of moving the tank from the rear or the front of the floating structure to the internal space of the floating structure by moving, the following effects can be exhibited.

  In other words, since the carrier ship is interposed in the movement of the tank, even when constructing the tank on the shallow quay land, it is easy to mount the tank on the floating structure of the draft deeper than the quay depth. it can. That is, regardless of the draft of the floating structure, the tank can be moved to the internal space of the floating structure by horizontal movement. Therefore, since only a carrier boat is used, a general carrier boat is sufficient, and an expensive crane boat is not necessary.

  In this case, either or both of the carrier carrier and the floating structure can be subsidized and ascended by ballast adjustment, etc. as necessary. It is easy to move the tank to the interior space of the floating structure after adjusting the height of the carrier deck or the height of the bottom of the tank of the carrier and the bottom of the floating structure. Further, it is preferable because the tank of the carrier boat can be moved to the internal space.

  Further, by moving the tank from the rear or front of the floating structure, in other words, by moving the floating structure in the front-rear direction, it is possible to ensure the posture of the floating structure during the movement, When the tank is moved from the horizontal direction (width direction) of the floating structure to the internal space, the risk of rollover is reduced because the vertical inclination (trim) adjustment is easier to adjust than the horizontal inclination (heel). Compared to the above, it is possible to remarkably improve the safety in the mounting operation.

  Alternatively, in the method for constructing a floating facility, the tank may be constructed from the rear or the front of the floating structure by including a step of constructing the tank on land and a step of moving the tank in a horizontal direction from a quay. When moved to the internal space of the floating structure, the following effects can be exhibited.

  In other words, when constructing tanks on the shore of a quay having a deep depth, the tanker is installed on a floating structure that is shallower than the depth of this quay without interposing a carrier ship. Compared with the case, the working efficiency can be remarkably improved. Further, by moving the tank from the rear or front of the floating structure to the internal space of the floating structure, the risk of the rollover of the floating structure is reduced, and the safety in the mounting operation can be improved.

  In this case, the floating structure is configured as a sinking barge if necessary, so that the height of the bottom of the ship can be adjusted to the height of the quay by sinking. The tank may be moved by a roll-on method.

  In the above construction method of a floating facility, when a lashing bridge or a lateral strength member is moved to the internal space between the movement of the tank to the internal space and the next movement of the tank to the internal space, a floating structure No need to build a lashing bridge or a lateral strength member on top of the tank, the tank can be moved to the interior space of the floating structure and the tank can be fixed to the lashing bridge soon, and the tank can be fastened to the floating structure quickly. Therefore, working efficiency can be improved, and safety can be improved.

  In the above construction method of a floating facility, in the internal space of the floating structure on which the tank is mounted, a part or all of the load of the tank extends in the front-rear direction of the floating structure on both sides of the internal space. If a load sharing guide member that performs either one or both of support of the tank and guidance of movement of the tank is provided, the following effects can be exhibited.

  In other words, the load sharing guide member can be used as a shared support or guide for the tank weight at the time of sliding the tank or the lateral load at the time of rolling, or the load sharing guide member can be used as a part or all of the sliding surface of the tank. Since it can be used, the tank can be moved to the internal space of the floating structure with a simple configuration while preventing the tank from departing.

  The position of the load sharing guide member is set according to the width of the tank to be inserted. Usually, the width of the tank is often close to the width of the floating structure. Provided at a position close to Further, it is preferable that the load sharing guide member is firmly integrated with the floating structure to increase the structural strength.

  In addition, the lateral force acting on the tank can be easily received by the load sharing guide member, so that even during the operation of the floating equipment, this structure allows the floating structure to roll. The structure to withstand the force acting on the tank by movement can be reduced in weight and cost.

  In other words, because the tank can be supported from the side near the center of gravity, the structural strength required for the rolling of the tank can be reduced, and the strength required only for hanging without using the suspension is also reduced. In combination, the light structure can be achieved, and the weight can be reduced and the cost can be reduced.

  In the construction method of the floating equipment described above, when the tank is constituted by an independent rectangular tank or a bag-type tank, the tank can be moved independently. This independent square tank has a structural member inside and has a self-supporting structure. The bag-type tank is a bag-like tank of a single film type tank or a multi-film type tank formed by a single or a plurality of film states such as single, double, or triple.

  In the above construction method of a floating facility, when a buoyancy auxiliary structure for adjusting a sinking amount of the floating structure is temporarily disposed on a lower side or a side surface of the floating structure, the buoyancy structure is formed by the buoyancy auxiliary structure. The buoyancy of the body can be assisted, the amount of subsidence of the buoyancy structure can be reduced, the height of the quay where the tank is placed, or the height of the deck of the carrier ship carrying the tank, and the floating body It becomes possible to easily match the height of the internal space of the structure with the ship bottom.

  And the maintenance method of the floating body equipment of the present invention for achieving the above object has a storage equipment including a tank that can be moved independently and a top side, and the tank is an internal space of the floating body structure. In the maintenance method of the floating equipment provided for, the opening that allows the tank to pass through the internal space of the floating structure where the tank is disposed and forward or rearward of the floating structure, The method includes a step of moving the tank to a transport carrier through the opening by moving the tank in a horizontal direction.

  According to this method, the tank can be moved to a carrier ship, and the tank can be subjected to maintenance inspection, cleaning, repair, etc. on the carrier ship or on land. There is no need to perform maintenance, cleaning, repair, etc. on the tank on the floating equipment. Furthermore, the tank can be replaced with an old tank and a new tank or a tank that has been inspected, cleaned and repaired. Therefore, the work efficiency of tank maintenance can be significantly improved.

  Moreover, the floating body facility of the present invention for achieving the above object has a storage facility including a tank that can be moved independently and a top side, and the tank is provided in the internal space of the floating body structure. In the course of constructing a floating facility, an opening through which the tank can pass when moving the tank into the internal space of the floating structure is provided in front of or behind the floating structure. .

  According to this configuration, the floating structure can be moved by moving the tank that can be moved independently from the quay where the tank is disposed or from the carrier ship on which the tank is mounted. Since it can move to the internal space of the body, it becomes possible to implement the construction method of the floating equipment.

  In the floating structure of the floating equipment described above, if the rear structure is removed from the rear of the floating equipment, the floating structure of the floating equipment can be easily formed in the construction process. .

  As described above, according to the construction method of the floating facility of the present invention, the tank is constituted by a tank that can be moved independently, and is mounted from the quay where the tank is arranged or the tank is mounted. Since the tank is moved to the interior space of the floating structure by moving the tank in the horizontal direction from above the transporting carrier, the tank can be used without lifting work in a crane ship, etc. It is moved to the internal space of the floating structure by slide or the like by horizontal movement called loading such as skid-on type skidding or roll-on method, and arranged in the internal space of the floating structure Is done.

  Therefore, unlike the conventional method of providing the top side in the floating structure after the tank is mounted, even after part or all of the top side module is mounted on the floating structure of the floating equipment, the top side Even after the installation of the tank, the tank can be provided in the internal space of the floating structure of the floating equipment, and the floating structure that will be equipped with the top side module and the construction of the tank as the storage equipment Construction and remodeling work can be done in parallel.

  In addition, as a result, tanks composed of independent rectangular tanks or bag-type tanks, also called SPB tanks (self-standing square tanks), can be mounted alternately with skids and bogies, with tanks and lashing bridges (bulkheads) You can also put hatches.

  In addition, according to the maintenance method for floating body equipment of the present invention, the tank can pass through the internal space of the floating body structure in which a tank that can be moved independently is arranged and forward or backward of the floating body structure. Open the opening and move the tank in the horizontal direction, which includes the step of moving the tank to the carrier by passing through the opening. Maintenance, inspection, cleaning, repair, etc. can be carried out on a carrier ship or on land, and maintenance, inspection, cleaning, repair, etc. of tanks need to be carried out on floating facilities moored at offshore installation sites that are prone to stormy weather Disappear. Furthermore, the tank can be replaced with an old tank and a new tank or a tank that has been inspected, cleaned and repaired. Therefore, the work efficiency of tank maintenance can be significantly improved.

  Furthermore, according to the floating equipment of the present invention, an opening through which the tank can pass when the tank that can be moved independently into the internal space of the floating structure is moved is provided in front of or behind the floating structure. Therefore, by moving the tank that can be moved independently from the quay where the tank is located, or from the carrier ship carrying the tank, the floating structure can be moved horizontally. It can move to the internal space. Therefore, the construction method of the floating body facility and the maintenance method of the floating body facility can be implemented.

It is a cross-sectional view of the floating body equipment which shows typically the structure of the floating body equipment of embodiment which concerns on this invention. It is a perspective view showing typically the structure of the floating equipment of an embodiment concerning the present invention. It is a figure which shows typically the movement of the horizontal direction of the tank from the quay to the carrier ship in the construction method of the floating body equipment of 1st Embodiment which concerns on this invention. It is a figure which shows typically the movement of the horizontal direction of the tank from a carrier truck to the floating body structure in the construction method of the floating body equipment of 1st Embodiment which concerns on this invention. It is a figure which shows typically the movement of the horizontal direction of the tank from a quay to a floating body structure in the construction method of the floating body equipment of 2nd Embodiment which concerns on this invention. It is a figure which shows typically the horizontal movement of the rear structure part from a quay to a floating body structure in the construction method of the floating equipment of the 2nd embodiment concerning the present invention, and installation of the rear structure part to a floating body structure. is there. It is a cross-sectional view of the floating equipment which shows typically the structure of the floating equipment of a prior art.

  Hereinafter, a construction method for a floating body facility, a maintenance method for a floating body facility, and a floating body facility according to an embodiment of the present invention will be described. In the description of this embodiment, the FPSO is described as an example of the floating equipment, but the present invention is not necessarily limited to this FPSO and can be applied to other floating equipment.

  Such floating facilities are not limited to crude oil but also include those that produce marine mineral resources, renewable energy, and biological resources. Further, the floating body (F) is not necessarily limited to those having all functions of production (P), storage (S), and shipping (O). For example, after the arrival at the installation place on the ocean, the floating body This includes equipment that is installed on the bottom of the equipment, equipment that is mounted on a jacket, and equipment that does not have storage equipment (S) and that does not have production function (P).

  In order to clarify the difference between the present invention and the prior art, first, a conventional floating equipment 1X as shown in FIG. 7 will be described. The floating facility 1X is a modification of a typical large crude oil tanker (VLCC), and includes a bottom 11, a ship side skin 12, a front structure (not shown), a rear structure (stern). : A tanker-shaped floating body structure 10X and a top side 20 of a floating body facility.

  Since this floating equipment 1X is a modification of a large crude oil tanker, the support structure 18 is provided on the deck 15 on the floating structure 10X, and the top side 20 is provided thereon. The position of the center of gravity has become high. Further, a central tank 17Xa and a side tank 17Xb as large crude oil tankers before remodeling are provided as storage equipment 17X of the floating equipment 1X inside the floating structure 10X.

  As an example of the size of this floating equipment 1X, for example, a light load amount of about 50,000 tons (weight tons), a hull length of about 340 m, a tank section length of about 200 m, a hull width of about 58 m, and a dry The dredging is about 10m, the draft is about 23m, and the hull height is about 33m.

  On the other hand, as shown in FIGS. 1 to 6, the floating facility 1 according to the embodiment of the present invention includes a floating structure 10 having a storage facility 17 in an internal space A and a top side 20. The floating body facility 1 is constructed by modularizing a part or all of the module and mounting the modular top side module 21 on the deck 15 of the floating structure 10.

  As shown in FIGS. 1, 2, and 4 to 6, this floating structure 10 includes a ship bottom portion 11, a ship side outer plate portion 12, a front structure portion (a ship structure as a floating structure) ( It has a bow portion 13 and a rear structure portion (stern portion) 14. These structures are the same as the floating structure 10 of the prior art. The top side 20 is a production facility called a process, and is composed of main equipment such as an oil treatment facility, a gas treatment facility, a water treatment facility, a power generation facility, and a control system.

  Then, the tank 17a and the tank 17a of the storage facility 17 are placed in the interior space A surrounded by the ship bottom part 11, the ship side skin part 12, the front structure part (bow part) 13, and the rear structure part (stern part) 14. A lashing bridge (or a lateral strength member such as a bulkhead) 17b for fixing is provided.

  With respect to the rear structure section 14, the floating body facility 1 is divided into a residential area and a production / storage plant area, and the residential area is provided in the rear structure section 14, so that the floating structure can be provided without mooring the rear structure section 14. When the part except the rear structure part 14 is moored in the facility 1 and the rear structure part 14 is detachably connected to the floating body equipment 1 of the part excluding the rear structure part 14, Since the timing can be set after the tank 17a and the lashing bridge (or a lateral strength member such as a bulkhead) 17b are installed, the degree of freedom in the construction process is increased. In addition, in the event of stormy weather such as a typhoon or emergency such as a fire, the crew members are easily and quickly scattered by detaching the rear structure 14 with this residential area. To be able to.

  As an example of the size of the floating equipment 1, for example, a light load amount of about 50,000 tons (weight tons), a hull length of about 160 m, a tank section length of about 150 m, a hull width of about 60 m, and a dry The dredging is about 10m, the draft is about 34m, and the hull height is about 44m.

  In the present invention, the tank 17a is composed of a tank that can be moved independently, for example, an independent rectangular tank or a bag-type tank. This independent square tank is a tank which has a self-standing structure with a structural member inside, and the bag type tank is formed by a single or a plurality of film states such as single, double or triple. This is a bag-shaped tank.

  And the top side module 21 which modularized the top side 20 is mounted in the deck 15 (deck), These top side modules 21 are combined, and the top side 20 is comprised. The top side 20 or the top side module 21 and the deck 15 are placed on both sides in the width direction (Y direction) of the floating structure 10 and in the front-rear direction (X direction) of the floating structure 10. The deck 15 may be fixed to the floating structure 10 after being mounted on the top side 20, or the top side 20 or the top side module 21 may be mounted on the deck 15 already fixed to the floating structure 10. In the present invention, the mounting method of the top side 20 or the top side module 21 is not particularly limited.

  Next, the construction method of the floating facility according to the embodiment of the present invention will be described. This construction method of the floating equipment is a construction method of the floating equipment that has the storage equipment 17 including the tank 17 a and the top side 20 and constructs the floating equipment 1 including the tank 17 a in the internal space A of the floating structure 10. In the construction method of the floating equipment, the tank 17a is constituted by a tank that can be moved independently, and from the quay 30 on which the tank 17a is arranged, or a carrier ship on which the tank 17a is mounted. 40 is a method including a step of moving the tank 17a to the internal space A of the floating structure 10 by moving the tank 17a in the horizontal direction from above.

  According to this construction method of the floating equipment, the tank 17a does not use a lifting operation in a crane ship or the like, but moves in a horizontal direction called a skid-on type skid or a roll-on type loading. Then, it is moved to the internal space A of the floating structure 10 by sliding or the like, and the tank 17 a is disposed in the internal space A of the floating structure 10.

  Therefore, unlike the method of providing the top side 20X in the floating structure 10X after mounting the tank according to the prior art, a part or all of the top side module 21 is mounted on the floating structure 10 of the floating facility 1 by the above method. Even after or after the top side 20 has been installed, the tank 17a can be provided in the internal space A of the floating structure 10 of the floating facility 1. Therefore, the construction / remodeling work of the floating structure 10 having the tank 17a as the storage facility 17 and the mounting of the top side module 21 can be performed in parallel.

  That is, since the storage facility 17 including the tank 17a that can be moved independently may reach the floating structure 10 later than the top side module 21, storage of the tank 17a and the like is performed simultaneously with the integration of the top side module 21. It is also possible to proceed with the construction of providing the equipment 17 in the internal space A of the floating structure 10, and the overall construction period can be shortened. As a result, in order to reduce the borrowing interest rate of the construction funds, it is possible to deliberately delay the purchase of expensive tanks 17a such as independent rectangular tanks and shorten the borrowing period of the funds.

  It is mounted on a rail (not shown) or the like provided in the internal space A of the floating structure 10 by moving it with a slide or a wheel directly or indirectly via a carriage (not shown). Therefore, there are no restrictions on the height, width and length when hanging with a crane.

  Thus, the floating body structure 10 used in the construction method of the floating body equipment has the storage equipment 17 including the tank 17a that can be moved independently and the top side 20, and the tank 17a is used as the floating body structure 10. During the construction of the floating body facility 1 provided in the internal space A, the opening 19 through which the tank 17a can pass when moving the tank 17a to the internal space A of the floating body structure 10 is provided in front of or behind the floating body structure 10. The configuration is provided.

  According to the floating structure 10 of the floating facility of this embodiment, the tank 17a constituted by a tank that can be moved independently is mounted on the quay 30 where the tank 17a is disposed or the tank 17a is mounted. It can move to the internal space A of the floating structure 10 by moving in the horizontal direction from above the transporting carrier 40.

  If the floating structure 10 is configured with the rear structure 14 removed from the rear portion of the floating facility 1, the floating structure 10 of the floating facility 1 according to this embodiment is easily formed in the construction process. Can do. That is, by the separation of the rear structure portion 14, it is possible to realize the mounting of the top side module 21 in the front-rear direction from the rear of the floating structure 10.

  More specifically, the method for constructing the floating facility includes a step of constructing the tank 17a on land in the method for constructing the floating facility according to the first embodiment shown in FIGS. 3 and 4, and a tank 17a. Is mounted on the carrier 40 by moving in the horizontal direction, and the tank 17a mounted on the carrier 40 is moved in the horizontal direction so that the tank 17a can be moved from the rear or front of the floating structure 10 to the floating structure. It is a method including the process of moving to ten internal spaces A.

  In the method of interposing the carrier boat 40, the carrier boat 40 is interposed in the movement of the tank 17a. Therefore, even when the tank 17a is constructed on the shallow quay 30 land, it is deeper than the depth of the quay 30. The tank 17a can be easily mounted on the floating body structure 10 of the draft. That is, the tank 17a can be moved to the internal space A of the floating structure 10 by horizontal movement regardless of the draft of the floating structure 10. Therefore, since only the carrier boat 40 is used, there is only a general carrier boat, and an expensive crane boat is not necessary.

  In this case, either or both of the carrier 40 and the floating structure 10 can be sunk and floated by ballast adjustment as necessary, and the quay 30 is combined by subsidence or levitation of either or both. The height of the deck of the carrier boat 40 or the height of the bottom of the tank 17a of the carrier boat 40 and the height of the bottom 11 of the floating structure 10 are roughly matched, and then the tank 17a is floated. When moved to the internal space A of the structure 10, the tank 17a of the carrier boat 40 can be easily moved to the internal space A.

  Alternatively, more specifically, the method for constructing the floating facility includes a step of constructing the tank 17a on land and a quay 30 in the method for constructing the floating facility according to the second embodiment shown in FIGS. And moving the tank 17a from the rear or the front of the floating structure 10 to the internal space A of the floating structure 10 by moving the tank 17a in the horizontal direction.

  When the tank 17a is constructed on the shore of the quay 30 having a deep depth by the method without interposing the carrier boat 40, the floating body of the draft shallower than the depth of the quay 30 without interposing the carrier boat 40. Since it mounts in the structure 10, compared with the case where the carrier boat 40 is interposed, work efficiency can be improved remarkably.

  In this case, the floating structure 10 is configured as a sinking barge (floating and sinking type carrier) as necessary, and the height of the ship bottom 11 can be adjusted to the height of the quay by sinking (sinking). The tank 17a may be moved by skidding or a roll-on method.

  In the floating facility construction method according to the first and second embodiments, the tank 17a is moved from the rear or front of the floating structure 10, in other words, by moving the floating structure 10 in the front-rear direction (X direction). By moving to the internal space A of the floating structure 10, the securing of the posture of the floating structure 10 during this movement becomes adjustment of the vertical inclination (trim) that is relatively easier to adjust than the horizontal inclination (heel). The risk of rollover is reduced, and the safety in the mounting operation can be remarkably improved as compared with the case where the tank 17a is moved from the lateral direction (width direction) of the floating structure 10 to the internal space A.

  Furthermore, when the lashing bridge (or the lateral strength member) 17b is moved to the internal space A between the movement of the tank 17a to the internal space A and the movement of the next tank 17a to the internal space A, the floating structure 10 It is no longer necessary to build the lashing bridge (or the lateral strength member) 17b, the tank 17a can be moved to the internal space A of the floating structure 10, and the tank 17a can be fixed to the lashing bridge 17b shortly, to the floating structure 10 of the tank 17a. Can be quickly fixed, so that work efficiency can be improved and safety can be improved.

  Further, as shown in FIGS. 1 and 2, in the internal space A of the floating body structure 10 on which the tank 17 a is mounted, load sharing guide members 16 extending in the front-rear direction of the floating body structure 10 are provided on both sides of the internal space A. If the convex portion 17aa on the tank 17a side is configured to be supported or guided, the load sharing guide member 16 may be used as a shared support or guide for the tank weight when the tank 17a slides or the lateral load when rolling. In addition, since the load sharing guide member 16 can be used as a part or all of the sliding surface of the tank 17a, the tank 17a can be disposed inside the floating structure 10 with a simple configuration and preventing the tank 17a from departing. Move to space A.

  The position of the load sharing guide member 16 is set in accordance with the width of the tank 17a to be inserted. However, in many cases, the width of the tank 17a is close to the width of the floating structure 10, so normally It is provided at a position close to the heel side of the floating structure 10. Further, it is preferable that the load sharing guide member 16 is firmly integrated with the floating structure 10 to increase the structural strength.

  Further, since it is possible to easily receive the lateral force acting on the tank 17a by the load sharing guide member 16, this structure allows the lateral force of the floating structure 10 to be maintained even during the operation of the floating facility 1. The structure for withstanding the force acting on the tank 17a by the swinging (rolling) motion can be reduced in weight and cost.

  In other words, since the tank 17a can be supported from the side near the center of gravity, the structural strength necessary for the rolling of the tank 17a can be reduced, and the strength required only for hanging without being suspended is also provided. It can be reduced, and both can be made lighter, and the weight can be reduced and the cost can be reduced.

  A rail (not shown) on which the tank 17a rides when the tank 17a is placed and moved on the ship bottom 11 or the load sharing guide member 16, and a single or a plurality of guide rails are provided. By providing a guide for guiding the tank 17a when the tank 17a is moved on the ship side outer plate portion 12, it is possible to move the tank 17a smoothly while suppressing lateral blur in the lateral direction.

  In addition, when using a trolley | bogie when moving the tank 17a to a horizontal direction and arrange | positioning on the ship bottom part 11, although a rail (not shown) can be used as a rail which mounts the wheel of a trolley | bogie, In the case of a cart that is not used, these rails are unnecessary. However, even in this case, it can be used as a guide rail.

  Further, in these construction methods of the floating equipment, if the buoyancy auxiliary structure 50 for adjusting the sinking amount of the floating structure 10 is temporarily disposed on the lower side or the side surface of the floating structure 10, the buoyancy auxiliary structure. 50, the buoyancy of the buoyancy structure 10 can be assisted, the amount of subsidence of the buoyancy structure 10 is reduced, and the height of the quay 30 where the tank 17a is disposed or the transportation carrying the tank 17a. The height of the deck of the carrier 40 and the height of the bottom 11 of the inner space A of the floating structure 10 can be easily matched.

  In these construction methods of the floating facilities, after the tank 17a and the lashing bridge (or the lateral strength member) 17b are mounted, the rear structure portion 14 is moved from the carrier 40 or as shown in FIG. It moves in the horizontal direction from 30 to the floating structure 10 and is installed in the floating structure 10 to close the internal space A and drain the water in the internal space A.

  As described above, according to the construction method of the floating equipment of the above-described embodiment, the tank 17a can be used for horizontal movement or roll called skid-on type skidding without using a lifting work in a crane ship or the like. The tank 17 a is disposed in the internal space A of the floating structure 10 by being moved to the internal space A of the floating structure 10 by a slide or the like by horizontal movement called loading such as an ON method.

  Therefore, unlike the prior art process of providing the top side 20X on the floating structure 10X after mounting the tank, even after a part or all of the top side module 21 is mounted on the floating structure 10 of the floating facility 1. In addition, even after the installation of the top side 20, the tank 17 a can be provided in the internal space A of the floating structure 10 of the floating equipment 1, and the tank 17 a which is the mounting and storage equipment 17 of the top side module 21 can be provided. Construction and remodeling work of the floating structure 10 can be performed in parallel.

  In addition, the tank 17a constituted by an independent rectangular tank or a bag-type tank, which is also referred to as an SPB tank (self-standing square tank), is replaced with a tank 17a and a lashing bridge (or lateral strength member) 17b by skidding or bogie. It will be possible to place them alternately and hatches.

  Next, a maintenance method for floating body equipment according to an embodiment of the present invention will be described. This maintenance method for floating equipment has a storage equipment 17 including a tank 17 a that can be moved independently, and a top side 20, and the maintenance method for the floating equipment includes the tank 17 a in the internal space A of the floating structure 10. In this method, an opening 19 that opens to the interior space A of the floating structure 10 in which the tank 17a is disposed and through which the tank 17a can pass is opened in front of or behind the floating structure 10, and the tank This is a method including a step of moving the tank 17a through the opening 19 to the transport carrier 40 by moving the 17a in the horizontal direction.

  Moreover, according to the maintenance method of the floating equipment of the above embodiment, the tank 17a is moved to the transport carrier 40, and the tank 17a is subjected to maintenance inspection, cleaning, repair, etc. on the transport carrier 40 or on land. Therefore, there is no need to perform maintenance inspection, cleaning, repair, etc. of the tank 17a on the floating facility 1 moored at an offshore installation location that is likely to be hit by stormy weather. Furthermore, the tank 17a can be replaced with a new tank 17a or a tank 17a that has been inspected, cleaned, or repaired. Accordingly, the maintenance work efficiency of the tank 17a can be remarkably improved.

DESCRIPTION OF SYMBOLS 1, 1X Floating body equipment 10, 10X Floating structure 11 Ship bottom part 12 Ship side outer plate part 13 Front structure part (bow part)
14 Rear structure (stern)
15 deck 15a mounting part 16 load sharing guide member 17 storage equipment 17a tank 17b lashing bridge (or lateral strength member)
18 Support Member 19 Opening 20 Top Side 21 Top Side Module 30 Quay 40 Transporting Carrier 50 Buoyancy Support Structure

Claims (10)

  In a construction method of a floating body facility having a storage facility including a tank and a top side, and the tank is provided in an internal space of the floating body structure, the tank is configured to be able to move the tank independently. In addition, the tank is moved horizontally from the quay where the tank is disposed or from the carrier boat on which the tank is mounted, whereby the tank is moved to the internal space of the floating structure. A method of constructing a floating facility comprising the step of moving to   Constructing the tank on land, mounting the tank on a carrier ship in a horizontal direction, moving the tank mounted on the carrier ship in a horizontal direction, The method for building a floating facility according to claim 1, further comprising a step of moving to the internal space of the floating structure from the rear or front of the floating structure.   Building the tank on land, and moving the tank horizontally from the quay to move the tank from the rear or front of the floating structure to the internal space of the floating structure. The method for constructing a floating facility according to claim 1.   The lashing bridge or the lateral strength member is moved to the internal space between the movement of the tank to the internal space and the next movement of the tank to the internal space. The construction method of the floating body equipment of 1 item | term.   In the internal space of the floating structure that mounts the tank, it extends in the front-rear direction of the floating structure on both sides of the internal space, and supports part or all of the load of the tank and guides the movement of the tank The construction method of the floating body installation of any one of Claims 1-4 characterized by providing the load sharing guide member which performs any one or both of these.   The said tank is comprised with the tank of the independent square tank or the bag system, The construction method of the floating body installation of any one of Claims 1-5 characterized by the above-mentioned.   The buoyancy assist structure for adjusting the amount of settlement of the floating structure is temporarily disposed on a lower side or a side surface of the floating structure. How to build a floating facility.   In the maintenance method of a floating facility having a storage facility including a tank that can be moved independently and a top side and having the tank in an internal space of the floating structure, the floating structure in which the tank is disposed An opening that allows the tank to pass through is opened in front of or behind the floating structure, and the tank is moved in the horizontal direction so that the opening passes through the tank. The maintenance method of the floating body equipment characterized by including the process of moving to a carrier ship.   A storage facility including a tank that can be moved independently and a top side, and the tank is provided in the internal space of the floating structure. A floating facility, wherein an opening through which the tank can pass when moving the tank is provided in front of or behind the floating structure.   The floating structure of the floating equipment according to claim 9, wherein a rear structure is removed from a rear portion of the floating equipment.

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