JP2003232039A - Upset structure of retaining wall - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a method of excavating a vertical hole to set up a concrete structure by completely opening a vertical hole defined by the retaining wall to carry in a building material or a concrete as in a conventional example. Provided is an uplifting structure of a retaining wall that does not generate an obstacle that hinders construction of a building and can obtain an appropriate anti-earth pressure. An earth retaining wall (5) is arranged in a cylindrical shape, and when the vertical hole (1) is excavated in the cylindrical earth retaining wall (5), the earth retaining wall (5) is raised. A plurality of arc-shaped uplifting members 8 are arranged in an annular shape along the peripheral surface, and the earth retaining wall 5 is supported by the convexly curved arc surface of each of the arc-shaped uplifting materials 8, and each of the arc-shaped uprisings is provided. An axial force w1 is applied to each arc-shaped flared material 8 by a jack 9 interposed between the ends of the material 8 so that each arc-shaped flared material 8 resists the convex curved direction on the convex curved side arc surface. An earth pressure w2 is generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for raising an earth retaining wall, which is a typical example of the earth retaining structure suitable for civil engineering work in which a vertical hole is excavated in the ground and a structure such as concrete is constructed in the vertical hole. Concerning the wall waving structure.

[0002]

2. Description of the Related Art As shown in FIGS. 1A and 1B, a vertical hole 1 is formed on the ground.
When constructing a concrete structure 3 that stands up from the base foundation 2 to the ground in the vertical hole 1, as shown in FIG. 1A, a sheet pile 4 is driven in a square shape to form a square tubular earth retaining wall 5. As shown in FIG. 1B, the rectangular tubular earth retaining wall 5
A vertical hole 1 is formed by excavating the inside, and a concrete structure 3 that stands up to the ground is constructed in the vertical hole 1. This method is often used in the construction of bridge piers that support bridges.

On the other hand, as a means for reinforcing the anti-soil pressure of the rectangular tubular earth retaining wall 5, as shown in FIG. 1A, a bellows member made of H-shaped steel is formed along the inner surface of each side of the rectangular tubular soil retaining wall 5. 6 is installed laterally, and a cross beam 7 made of H-shaped steel that crosses the inside of the vertical hole 1 and intersects with each other is arranged to support the bellows member 6 in a stretched manner.

As shown in FIG. 1B, the assembly of the bellows raising member 6 and the cutting beam 7 is formed in the depth of the vertical hole 1 (the height of the earth retaining wall 5 in the ground).
According to the above, it is arranged in multiple stages, and in each stage, a plurality of girders 7 are arranged vertically and horizontally to obtain the required anti-earth pressure.

[0005]

In the above-mentioned conventional bellows construction method, that is, the earth retaining method, since the cross beams 7 that cross the vertical hole 1 are present in the vertical and horizontal directions, the lower cut beam 7 and the bellows member 6 are formed. In addition to sequentially removing the assemblies and backfilling them, assembling the reinforcing bars, and additionally striking the concrete in stages, there is no choice but to adopt the construction method of constructing the concrete structure 3 of the required height, which is excessive. This resulted in spending construction period and cost.

[0006] In addition, since the method is a swelling method in which the reinforcing bars are additionally assembled and the concrete is additionally hammered, it also causes the reliability of the strength of the concrete structure 3 to be impaired.

In addition, the construction work itself for the abdomen waving member 6 and the cutting beam 7 requires a great deal of labor and cost.

[0008]

According to the present invention, the abdomen raising structure formed by the abdomen raising member 6 and the cutting beam 7 is eliminated and the same abdomen raising structure is appropriately and easily formed. Therefore, the above-mentioned various problems caused by the conventional abdomen-raising structure are fundamentally solved.

The present invention provides, as a basic idea, an arc-shaped waving member and a structure for waving an earth retaining wall by cooperation of a jack.

That is, an arc-shaped bellows member is laterally provided on the side opposite to the clay-clad wall side, and the cleat wall is supported on the arc surface of the convex side, and the arc-shaped bellows member is supported. The basic structure is a bellows rising structure of the earth retaining wall that applies axial force from the end of the jack to generate anti-earth pressure in the convex bending direction on the convex curved arc surface of the litter member.

In accordance with this basic idea, the earth retaining wall is formed into a cylindrical shape, and a vertical hole is excavated in the cylindrical earth retaining wall,
A plurality of arc-shaped uprising members are annularly arranged along the inner peripheral surface of the cylindrical earth retaining wall defining the vertical holes, and earth retaining is performed on the convex curved arc surface of each arc-shaped uprising member. Support the wall.

Then, a jack is provided between the ends of the arc-shaped uprising members, and by extending the jacks, the adjacent arc-shaped uprising members are given axial forces in opposite directions to each other. An axial force is applied to the arc-shaped waving material, thereby forming a waving structure of the earth retaining wall that causes anti-earth pressure in the convex curve direction on the convex-side arc surface of each arc-shaped waving material.

For example, the cylindrical earth retaining wall is formed by driving a large number of sheet piles in a circular shape to form a bellows raising structure by cooperation of the arc-shaped bellows member and the jack.

The jack is left as it is with an axial force applied until the arc-shaped upset member is removed. Alternatively, the jack is removed by interposing a spacer for holding the axial force of the jack between the end portions of the arc-shaped upset member.

Alternatively, the jacks are removed by connecting the end portions of the arcuate upset member with a connecting joint that holds the axial force of the jacks.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS.

As described above, the present invention eliminates the bellows raising structure by the conventional earth retaining method and the cutting beam, and provides the earth retaining structure by the cooperation of the arc-shaped bellow raising member 8 and the jack 9. It is the subject.

FIGS. 2 and 3 show first and second embodiments in which this is embodied in vertical hole excavation work for launching a concrete structure. As shown, the earth retaining wall 5 is formed into a cylindrical shape. A vertical hole (cylindrical vertical hole) 1 is excavated in the cylindrical earth retaining wall 5.

Along with the progress of the vertical hole excavation, a plurality of arcuate waving members 8 made of H-shaped steel and the like are formed annularly and horizontally along the inner peripheral surface of the cylindrical earth retaining wall 5 defining the vertical hole 1. Placed in
That is, a plurality of arcuate waving members 8 are arranged in an annular shape on a circular locus centered on the center of the vertical hole 1, and each of the arcuate waving members 8 is arranged.
The earth retaining wall 5 is supported by the convex curved arc surface.

Axial force w1 from the jack 9 is applied to the arc-shaped waving member 8 from one end or both ends thereof so that the same waving member 8 has an anti-earth pressure w in the convex bending direction on the convex-side arc surface.
2 is generated, and this anti-earth pressure w2 is applied to the cylindrical earth retaining wall 5
To obtain the strength against soil pressure w3. The axial force w1 is a compressive force applied to the arcuate axis of the arcuate uprising member 8.

For example, as shown in FIG. 2A, the cylindrical earth retaining wall 5 is arranged in a single circle (a perfect circle), and a plurality of circles (inscribed circles) along the inner peripheral surface of the cylindrical earth retaining wall 5 are formed. An abdomen support is made by a plurality of arc-shaped uprising members 8 of equal length that are equally divided into arcs.

Further, as shown in FIG. 3A, a cylindrical earth retaining wall 5
Is formed into a compound cylindrical shape in which two or more arcs (superior arcs) having substantially the same curvature are joined, and one compound circle (inscribed compound compound) along the inner peripheral surface of the compound cylindrical earth retaining wall 5 is formed. A circle is divided into a plurality of circular arcs, and the plurality of circular arc-shaped uprising members 8 receive the belly.

As shown in FIGS. 2B and 3B, the bellows raising structure comprising the arc-shaped bellows raising member 8 and the jack 9 is assembled in a plurality of upper and lower stages depending on the depth of the vertical hole 1.

Each of the arcuate uprising members 8 and the cylindrical earth retaining wall 5 formed of the single circle or the compound circle have substantially the same curvature, and each arcuate uprising member 8 has its convex curved side. Intermittent contact or continuous contact with the inner peripheral surface of the cylindrical earth retaining wall 5 in a free contact state over substantially the entire length of the arc surface.

For example, the cylindrical earth retaining wall 5 is formed by driving a large number of sheet piles 4 in a circular shape, and forms a bellows raising structure by the cooperation of the arc-shaped bellows member 8 and the jack 9.

The general-purpose sheet pile 4 is, as shown in FIG.
The side plate 4b is bent from the left and right side ends of the top plate 4a in the longitudinal direction to form a U-shaped channel, and the hook type joint 4c is bent and formed at the end of the left and right side plate 4b. In step (3), the hook type joint 4c is assembled in the hand of the partner and driven into the ground to form the earth retaining wall 5.

Each of the sheet piles 4 is rotatable around the hand-assembled portion of the phase of the hook-shaped joint 4c, and by utilizing this, an arc-shaped or cylindrical earth retaining wall 5 is constructed.

In addition to constructing the earth retaining wall 5 by the sheet pile 4, it is constructed by concrete piles, wooden piles, steel piles or flat steel plates, or flat wood plate materials. When constructing the earth retaining wall 5 with the sheet pile 4 as shown in FIG. 8, the arc-shaped uprising member 8 makes intermittent contact with the top plate 4 a of the sheet pile 4.

As shown in FIGS. 2A and 3A, a jack 9 is interposed between the end portions of the arc-shaped uprising members 8 and the arc-shaped uprising members adjacent to each other as the jack 9 extends. 8
To the full arc-shaped uprising member 8 by applying axial forces w1 in opposite directions to each other. The earth pressure w2 is generated, and this anti-earth pressure w2 is applied to the cylindrical earth retaining wall 5 to obtain the strength against the earth pressure w3.

As shown in FIGS. 2B and 3B, the above-mentioned assembly of the arc-shaped bellow raising member 8 and the jack 9 is arranged in a plurality of upper and lower stages according to the depth of the vertical hole 1 (the height of the earth retaining wall 5 in the ground). To obtain the required anti-earth pressure w2.

In both of the bellows raising structures illustrated in FIGS. 2 and 3, the vertical hole 1 defined by the cylindrical earth retaining wall 5 is completely opened as shown in the drawing to carry in building materials as in the conventional example. It is possible to obtain an appropriate anti-earth pressure w2 without generating an obstacle that hinders the construction of the concrete structure 3. Therefore, it is possible to construct the same building 3 by assembling the reinforcing rod to the height required for the concrete structure 3 and driving the concrete in the primary order without performing the additional reinforcement of the reinforcing bar and the additional reinforcement of concrete as in the conventional example.

After the concrete structure 3 is constructed, the assembly of the arcuate upraising member 8 and the jack 9 may be sequentially removed from the lower stage to the upper stage and backfilled in order.

In the embodiment shown in FIGS. 2 and 3, an example of forming a substantially true cylindrical earth retaining wall 5 and a compound cylindrical earth retaining wall 5 in which a true cylinder (exact arc) is combined are formed. Although an example is shown, a case in which these are applied to the earth retaining wall 5 having an elliptic cylinder shape or an oblong cylinder shape is included.

When a large number of sheet piles 4 shown in FIG. 3 are driven to construct the composite cylindrical earth retaining wall 5, pressure receiving members 1 such as columns made of steel are formed at the connecting portions of both cylindrical earth retaining walls 5 facing each other.
1'is arranged, that is, between the end of the one end of the cylindrical earth retaining wall 5 and the end of the other one of the cylindrical earth retaining wall 5 and the end of the arc-shaped upsetting member 8 A pressure receiving member 11 'is interposed, and the above-mentioned end-arc-shaped bellows members 8 are supported on opposite side surfaces of the pressure receiving member 11'.

Further, as shown in FIG. 3, a cross beam 7'is horizontally provided horizontally between the pressure receiving members 11 'arranged at the opposing connecting portions, and both pressure receiving members 11' are stretched between the connecting portions. To support.

The embodiment shown in FIGS. 2 and 3 described above is
An arc-shaped bellows member 8 is laterally provided on the opposite side of the earth retaining wall 5 to support the earth retaining wall 5 on the convex curved arc surface.
An earth retaining wall for applying an axial force w1 from the end of the arc-shaped upraising member 8 by the jack 9 to generate an anti-earth pressure w2 in the convex bending direction on the convex-curved arc surface. Includes abdominal structure as a basic idea.

In accordance with this basic idea, the earth retaining wall 5 can be applied to the earth retaining wall 5 which does not terminate in a cylindrical shape. That is, when a single arc-shaped waving member 8 is used and an axial force w1 is applied from both ends or one end of the jack 9 or a plurality of arc-shaped waving members 8 are arranged in an arc line or a straight line, The case where the axial force w1 by the jack 9 is applied to each of the raised members 8 is included.

FIG. 4 shows a third embodiment according to this basic structure. As shown in the figure, the earth retaining wall 5 is linearly formed using the sheet pile 4. Then, an arc-shaped bellows member 8 is laterally provided on the opposite side of the cleat wall 5 and the arc-shaped bellows member 8 is supported on the convex curved arc surface. An axial force w1 is applied by the jack 9 from its end to cause the litter member 8 to have an anti-earth pressure w2 in the convex bending direction on the convex curved side arc surface.

This earth retaining method can be carried out both in the case where the earth retaining wall 5 does not have a curvature that is synchronized with the arcuate uprising member 8 and in the case where it has a synchronized curvature.

As shown in FIG. 4, when the earth retaining wall 5 is the earth retaining wall 5 constructed in a linear shape having no curvature in synchronization with the arc-shaped bellows member 8, the soil is held at the apex of the litter member 8. Support the retaining wall 5 (raise).

In this case, as shown in FIG. 4, a straight rod-shaped auxiliary belly made of H-shaped steel or the like to be attached to the outer surface of the linear retaining wall 5 (the side opposite to the retaining side). Raised material 8 '
That is, a straight rod-shaped auxiliary uprising member 8'is interposed between the earth retaining wall 5 and the arc-shaped uprising member 8 and an anti-earth pressure is applied to the middle portion of the auxiliary uprising member 8'at its apex. give w2.

In this case, the bundle material 10 is arranged between the left and right extending portions of the auxiliary uprising member 8 ′ and the left and right extending portions of the arc-shaped uprising member 8 so as to be generated in the entire length of the arc-shaped uprising member 8. It is possible to uniformly apply the angry agitation force (anti-earth pressure w2) to the entire length of the auxiliary agitation material 8'through the bundle 10.

A pressure receiving member 11 such as a column is provided at both ends of the arcuate accelerating member 8, and the pressure receiving member 11 functions as a means for receiving the axial force w1 applied to the accelerating member 8 by the extension of the jack 9. Excuse me. When a plurality of arc-shaped uprising members 8 are arranged linearly, the pressure receiving member 11 may be interposed between the arc-shaped uprising members 8. The jack 9 is interposed between the arc-shaped uprising member 8 and the pressure receiving member 11 or between the arc-shaped uprising members 8.

Further, the earth retaining wall 5 is constructed in a linear shape with a curvature in synchronization with the arc-shaped uprising member 8, and as described above with reference to FIGS. The soil retaining wall 5 is supported over the entire length of the above, and a belly-raising force (anti-earth pressure w2) is generated over the entire length.

The jack 9 used in each of the above-described embodiments is left as it is while the axial force w1 is applied until the arc-shaped bellows 8 is removed. Alternatively, as shown in FIG. 5, the jack 9 is removed by interposing a spacer 12 for holding the axial force w1 of the jack 9 in the gap between the ends of the arcuate upset member 8.

Alternatively, as shown in FIG. 6, the jacks 9 are removed by connecting the ends of the arc-shaped upset member 8 with a connecting joint 13 that holds the axial force w1 of the jacks 9. For example, the end side surface of one arc-shaped waving material 8 and the end side surface of the other arc-shaped waving material 8 which are adjacent to each other are connected by a connection joint 13 made of a flat plate steel plate to remove the jack 9. To do.

As shown in FIGS. 2 and 3, the jack 9 is interposed between the end faces of the adjacent arcuate uprising members 8 or, as shown in FIG. 5, the adjacent one and the other circles. Brackets 19 projecting upward or upward and downward are attached to the respective ends of the arc-shaped uprising member 8, and the jack 9 is interposed between both brackets 19. FIG. 5 shows both the case where the jack 9 is allowed to remain during the construction period, and the case where the jack 9 is removed by connecting with the spacer 12 or the connecting joint 13.

The jack 9 used in each of the examples described above may be a jack having a hydraulic cylinder structure or a jack having a pneumatic cylinder structure.

Alternatively, a screw jack can be used,
In particular, a hydraulic screw type jack shown in FIG. 7 which can be expanded and contracted by hydraulic pressure and whose expansion or contraction position can be fixed by screwing is suitable.

The jack of the fluid pressure cylinder structure forms a soft pressurizing structure having a shock absorbing property, whereas the screw type jack is a rigid pressurizing structure having no shock absorbing property.

The screw type jack is a jack in which a cylinder and a cylinder rod are screwed together, and has a structure in which the cylinder rod is rotated to advance (extend) or retract (contract). An axial force w1 is applied to the belly-raising member 8 by screwing, and the axial force w1 is retained by screwing a female screw and a male screw.

As described above, the screw type jack is a rigid pressurizing structure and is excellent in pressure resistance against a large axial force w1.
It is suitable because it can maintain a constant tension force at all times and can easily set the tension force according to the tension position.

As described above, FIGS. 7A and 7B show the case where the jack 9 having both the hydraulic cylinder structure and the screw type jack structure is used. In this jack 9, one end of a cylinder rod 14 is airtightly fitted in the cylinder 15, a male screw is engraved on the outer peripheral surface of the other end protruding from the cylinder 15, and a stopper flange 16 is screwed into the male screw. However, the cylinder 15 has a structure in which a hydraulic pressure supply port 18 for supplying hydraulic pressure to the hydraulic chamber 17 formed in the lower surface of the cylinder rod 14 at the bottom of the cylinder 15 is provided.

Then, by supplying hydraulic pressure through the hydraulic pressure supply port 18, the cylinder rod 14 is expanded and a constant axial force w1 is applied to the arcuate uprising member 8 by a constant expansion amount.

Then, it is confirmed by a pressure gauge that the constant axial force w1 is applied, and in the state in which the axial force w1 is applied, the stopper flange 16 is screwed back along the cylinder rod 14 to the end surface of the cylinder 15. Sit down. Therefore, the contraction of the cylinder rod 14 is prevented, the expansion is maintained, and the constant axial force w1 applied to the arc-shaped bellows member 8 is maintained.

The stopper flange 16 prevents the cylinder rod 14 from screwing back and maintains the extended state, and then the hydraulic pressure in the hydraulic chamber 17 is extracted and opened through the hydraulic pressure supply port 18. Thereafter, the screw type cylinder rod 14 maintains the axial force w1 against the arc-shaped uprising member 8.

The first and second embodiments shown in FIGS. 2 and 3 are
It is extremely effective for construction work of overpasses such as highways and bridge piers such as river bridges.

[0058]

EFFECTS OF THE INVENTION According to the present invention, without using the abdomen rising member and the abdomen erecting structure of the cutting beam in the conventional example as a whole, the arc-shaped ablating member and the jack cooperate to provide a suitable anti-retaining wall. It can provide a belly-up structure that gives earth pressure.

Further, when a vertical hole is excavated to start up a concrete structure, the vertical hole defined by the earth retaining wall is completely opened to obstruct the carrying of building materials and the construction of the concrete structure as in the conventional example. It is possible to obtain a suitable anti-earth pressure without producing a thing.

Therefore, unlike the conventional example, it is possible to construct a rebar by constructing the rebar at a height required for the concrete structure and blasting the concrete in the primary order without constructing the rebar or the additional reinforcement of the concrete. Not only can it be improved, labor saving in construction can be achieved, and construction period and construction cost can be greatly reduced.

[Brief description of drawings]

FIG. 1A is a plan view illustrating a waving structure of a conventional earth retaining wall, and B is a longitudinal sectional view of the same.

FIG. 2A is a plan view showing a first embodiment of a belly-raising structure in an earth retaining wall according to the present invention, and B is a longitudinal sectional view thereof.

FIG. 3A is a plan view showing a second embodiment of the bellows rising structure in the earth retaining wall according to the present invention, and B is a longitudinal sectional view of the same.

FIG. 4 is a plan view showing a third embodiment of a belly-raising structure in an earth retaining wall according to the present invention.

FIG. 5 is a side view showing an example in which an axial force of the jack in the abdomen rising structure is held by a spacer.

FIG. 6 is a plan view showing an example in which an axial force generated by a jack in the abdomen rising structure is held by a connecting joint.

FIG. 7 is a cross-sectional view showing an example of a jack used in the belly-raising structure of the earth retaining wall, where A is the extended state of the jack and B is the state in which the extended state is maintained.

FIG. 8 is a plan view showing an example in which a sheet pile forming an earth retaining wall is used as an assembled hand.

[Explanation of symbols]

1 ... Vertical hole, 2 ... Base foundation, 3 ... Concrete structure,
4 ... sheet pile, 4a ... sheet pile top sheet, 4b ... sheet pile left and right side plates,
4c ... Hook type joint of sheet pile, 5 ... Earth retaining wall, 7 '... Cut beam, 8 ... Arc-shaped waving material, 8' ... Auxiliary waving material, 9
... jacks, 10 ... bundles, 11, 11 '... pressure receiving members, 1
2 ... Spacer, 13 ... Connection joint, 14 ... Cylinder rod, 15 ... Cylinder, 16 ... Stopper flange, 17
... hydraulic chamber, 18 ... hydraulic supply port, 19 ... bracket, w1
… Axial force, w2… anti-earth pressure, w3… earth pressure

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumihiro Saito             5-201 Horiuchi, Nonoichi-cho, Ishikawa-gun, Ishikawa Prefecture               Within Eco Japan Co., Ltd.

Claims (5)

[Claims] 1. An arch-shaped waving material is provided on the side of the earth retaining wall opposite to the earth-retaining side, and the earth retaining wall is supported on the arc surface of the convex side thereof. A bellows rising structure of the earth retaining wall, characterized in that an axial force by a jack is applied from the end thereof to cause anti-soil pressure in the convex curve direction on the convex curve side arc surface of the litter member. 2. An abutment structure for an earth retaining wall when the earth retaining wall is arranged in a cylindrical shape and a vertical hole is excavated in the cylindrical earth retaining wall, the inner peripheral surface of the cylindrical earth retaining wall. A plurality of arc-shaped waving members are annularly arranged along the ridge, and the earth retaining wall is supported by the convex curved side arc surface of each of the arc-shaped waving members, and between the ends of each of the arc-shaped waving members. The structure in which an axial force is applied to each arc-shaped waving material by a jack inserted in the above-mentioned structure to cause each arc-shaped waving material to generate anti-earth pressure in the direction of the convex curve on the above-mentioned convex-side arc surface The characteristic structure of the earth retaining wall is the waving structure. 3. A swelling structure for punching a plurality of sheet piles in a circular shape to form a cylindrical earth retaining wall, and excavating a vertical hole in the cylindrical earth retaining wall, wherein the cylindrical earth retaining wall. Arranging a plurality of arc-shaped waving materials in an annular shape along the inner peripheral surface of, and supporting the earth retaining wall with the convex curved arc surface of each of the arc-shaped waving materials,
A jack inserted between the ends of the arc-shaped waving members applies an axial force to each of the arc-shaped waving members to give each arc-shaped waving member a convex bending direction on the convex-side arc surface. The structure of the earth retaining wall is characterized by having the structure that causes the anti-earth pressure of the above. 4. A structure for removing the jack by interposing a spacer for holding the axial force of the jack between the end portions of the arc-shaped upset member.
Alternatively, the bellows rising structure of the earth retaining wall according to claim 2 or claim 3. 5. The structure according to claim 1, wherein the jacks are removed by connecting the end portions of the arc-shaped uprising member with a connecting joint that holds the axial force of the jacks. 2 or claim 3, wherein the earth retaining wall is raised.