JPH08151645A - Deep foundation pile type earth retaining wall - Google Patents

Abstract

PURPOSE: To provide a deep foundation type earth retaining wall capable of connecting earth retaining materials with a simple structure without requiring a specially machined liner plate such as a grooved liner plate for connecting the earth retaining material. CONSTITUTION: Multiple circular arc-shaped liner plates 14 are connected in the peripheral direction to form a cylindrical frame body 15a of one stage, and the cylindrical frame bodies 15a of multiple stages are vertically connected to form a deep foundation pit frame body 15 so that the connecting joints 17 in the peripheral direction are arranged in zigzag. The pinching/fixing sections 21 of connecting members 20 are pinched and fixed to the connecting joint sections 17 existing on every other stages of the deep foundation pit frame body 15 at the earth retaining material connecting positions. The upper and lower connecting members 20 are connected by connecting plates 24. The unpinched section does not interfere with the wave sections of the liner plates 14. The end section of the earth retaining material is connected to the connecting members 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep foundation pile-type earth retaining wall in which deep foundation piles constructed at intervals are connected by a soil retaining material, and in particular, a liner plate is provided while excavating inside. The present invention relates to a connection structure between a cylindrical deep foundation pile frame body formed by assembly and an earth retaining material.

[0002]

2. Description of the Related Art An example of a conventional deep foundation pile type earth retaining wall is shown in FIG.
0 is shown in a plan view. This deep foundation pile type earth retaining wall 1 has a structure in which deep foundation piles 2 constructed at intervals are connected by soil retaining materials 3. The deep foundation piles 2 are circular arc-shaped while performing internal excavation. The liner plate 4 of No. 1 is joined in the circumferential direction and the vertical direction (direction orthogonal to the paper surface) to form a cylindrical deep foundation pile frame body 5, and concrete 6 is placed therein to form the deep foundation pile 2 and To do. The deep foundation pile frame body 5 is formed into a circular shape by using a liner plate 4A having a normal arc shape and grooved liner plates 4B arranged at two positions in the diameter direction. Then, a concrete panel or a transverse sheet pile is fitted from above into the groove 4a of the grooved liner plate 4B as the earth retaining material 3 to form an earth retaining wall.

[0003]

In the above-mentioned conventional deep foundation pile type earth retaining wall 1, the grooved liner plate 4B for connecting the soil retaining material is used in a part of the deep foundation pile frame body 5. The attached liner plate 4B is manufactured by cutting the liner plate at the corrugated portion and welding another member to be the groove portion 4a. Therefore, the production thereof is extremely complicated, requires a lot of man-hours, and is expensive. The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and it is not necessary to use a liner plate such as a grooved liner plate which requires special processing as a structure for connecting earth retaining materials, and has a simple structure. The purpose of the present invention is to provide a deep foundation pile type earth retaining wall to which earth retaining materials can be connected.

[0004]

SUMMARY OF THE INVENTION According to the present invention for solving the above-mentioned problems, a one-step cylindrical frame body constituted by joining a plurality of arc-shaped liner plates in the circumferential direction is joined joint in the circumferential direction. And a plurality of deep foundation pile frames that are constructed by vertically joining in a zigzag arrangement and are installed at intervals, and in every other adjacent deep foundation pile frame body. And a connecting member having a sandwiching and fixing portion that is sandwiched and fixed to the joint joints that face each other, an engaging means for engaging the upper and lower connecting members of each deep foundation pile frame body, and an adjacent deep foundation pile frame body And an earth retaining material having both ends directly or indirectly connected to the connecting member.

[0005]

In the above structure, when the adjacent deep foundation pile frame bodies are assembled, the joint joint portions of the cylindrical frame bodies of the respective stages are arranged in a staggered manner, and the adjacent deep foundation pile frame bodies are arranged in the first stage. The sandwiching and fixing portions of the connecting members are sandwiched and fixed to the joint joint portions which are present every other and are opposed to each other. In this case, the corrugated portion of the liner plate comes to the opposite position in the stage immediately below, but the liner plate and the connecting member do not interfere in this portion.
Then, both ends of the earth retaining material are directly or indirectly attached to the connecting members of the adjacent deep foundation pile frame bodies to obtain a deep foundation pile type earth retaining wall.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view of a deep foundation pile type earth retaining wall 11 according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part in FIG.
FIG. 3 is a perspective view of the deep foundation pile frame portion in FIG. 1, FIG. 4 is an exploded perspective view in which an essential part in FIG. 3 is enlarged, and FIG. 5 is a cross-sectional view of the deep foundation pile type earth retaining wall 11 described above. Is a front view of the same.
This deep foundation pile type earth retaining wall 11 has a structure in which deep foundation piles 12 constructed at intervals are connected by soil retaining materials 13. The deep foundation piles 12 are circular arc-shaped while performing internal excavation. The liner plates 14 are connected in the circumferential direction and the vertical direction (direction orthogonal to the paper surface) to form a deep foundation pile frame body 15, and concrete 16 is placed therein to form the deep foundation pile 12.
As shown in FIG. 4, the liner plate 14 has a flat plate-shaped flange 14b formed by welding and fixing plates at both ends in the circumferential direction of the wave portion 14a, and a circle formed by bending material ends at both ends in the height direction. It has an arcuate flange 14c and has bolt insertion holes 14d and 14e for bolt connection in both flanges 14b and 14c. In addition, the holding and fixing unit 21
For both liner plates 14 that sandwich the pinch, since the thickness of the pinch-fixing part 21 is added, each pinch-fixing part 21 is prevented from causing inconveniences such as displacement with the bolt insertion holes of the upper and lower liner plates 14. The length (circumferential length) is shortened by half the thickness.

When assembling the deep foundation pile frame body 15, as shown in FIG.
As shown in FIG.
One-stage cylindrical frame body 15a configured by joining in the circumferential direction
A plurality of upper and lower joints (the joints between the flat plate-shaped flanges 14b of the liner plates 14 adjacent to each other in the circumferential direction) 17 are arranged in a staggered arrangement. Then, sandwiching and fixing portions 21 of the connecting member 20, which will be described later, are sandwiched and fixed to the joint joint portions 17 which are present at every other stage and are opposed to each other in the adjacent deep foundation pile frame bodies 15, and the upper and lower connecting members 20 are, for example, Engage via joint plate 24. After that, the connecting members 20 of the adjacent deep foundation pile frame bodies 15
By directly or indirectly attaching both ends of the earth retaining material 13 such as a concrete panel or a horizontal sheet pile, the deep foundation pile retaining wall 11 is obtained. In addition, normally, the work of connecting the earth retaining material 13 to the deep foundation pile frame body 15 is performed while sequentially excavating the front soil. A two-dot chain line a in FIG. 5 indicates the ground before the front soil is excavated.

Various configurations of the above-mentioned connecting member 20 are conceivable, and various combinations thereof and various engaging means for the connecting members 20 are also conceivable. That is, as the connecting member 20, as shown in the embodiment of FIGS. 3 and 4 and FIG. 7A, the holding and fixing portion corresponding to the height of the liner plate of one stage (shown by a in FIG. 4 and FIG. 7). 21) and a non-clamping portion (portion in a range indicated by b in FIG. 4 or 7) 22 extending below the clamping and fixing portion 21 by approximately one step of the liner plate height. The connecting member 20A (which is the connecting member according to claim 2) can be used. In addition,
The connecting member 20A is provided with a bolt insertion hole 20a through which a bolt 18 for pinching and fixing the joint member 17 is inserted, and a bolt insertion hole 20b through which a bolt for fixing a through member 25 described later is inserted. . In addition, FIG.
As shown in (a) and the like, for example, as the lowermost connecting member in the range where the earth retaining material 13 is arranged, the connecting member 20F (only the holding and fixing portion 21 having a height corresponding to the height of the liner plate of one step) ( The connection member according to claim 7) can be used.

As an engaging means for engaging the connecting members 20 with each other, for example, referring to the S portion of FIG. 7A, as shown in FIG. 8 or 9, one of the connecting members 20A is not pinched. The end of the portion 22 and the end of the holding and fixing portion 21 of the other connecting member 20A can be engaged with each other via the joint plate 24. In the case of FIG. 8, the joint plates 24 are fixed to both. In the illustrated example, one side is fixed by welding, and the other side is fixed by bolts 19. Also, FIG.
In this case, the joint plate 24 is welded and fixed to one side and simply lapped to the other side. In this case, the end portion of the non-sandwiching portion 22 (in the illustrated example, the joint plate 24 welded and fixed to the non-sandwiching portion 22) is used.
Wrap it so that the downward extension of) is on the side of the natural ground 26. Since the non-clamping part 22 is not directly joined to the deep foundation pile frame body 15, it cannot support a large earth pressure by itself, but the earth pressure acting on the non-clamping part 22 is clamped and fixed integrally with the non-clamping part 22. It can be supported by the sandwiching fixing portion 21 of the lower connecting member 20A that engages with the portion 21 via the joint plate 24.

Further, as shown in FIG. 7 (B) as an embodiment of the third aspect, the connecting member 20 has a holding and fixing portion 21 corresponding to the height of the liner plate in one step, and above the holding and fixing portion 21. It is possible to use the connecting member 20B provided with the non-clamping portion 22 that extends by substantially the height of the liner plate of one step. In the illustrated example, this connecting member 20B is used as the lowermost one in the range of the soil retaining material 13, and the connecting member 20F having only the sandwiching and fixing portion 21 is arranged above it. It is of course possible to use this connecting member 20B in the middle. In addition, the connecting member 20B and the connecting member 20F
A combination of only and is also possible. In addition, as shown in FIG. 7C as an embodiment of claim 4, the holding and fixing portion 21 corresponding to the height of the liner plate of one stage, and the holding and fixing portion 2
Connecting member 20 provided with upper and lower non-clamping portions 22 that extend approximately one step above and below the liner plate height
C can be used. In the illustrated example, this connecting member 2
The connecting members 20F having only the holding and fixing portions 21 are arranged both above and below 0C. Further, as an embodiment of claim 5, as shown in FIG. 7 (d), the holding and fixing portion 21 corresponding to the height of the one-stage liner plate, and the height of the one-stage liner plate both above and below the holding and holding portion 21. It is possible to use the connecting member 20D including the upper and lower non-clamping portions 22 'that extend by almost half of the above. In this case, the upper and lower connecting members 20D
The opposing non-clamping portions 22 'are fixed to each other by welding or bolting at the intermediate position. In this case, like the connecting member 20D ', the non-clamping portion 2 that extends by half is used.
A connecting member having 2 ′ only on one of the upper side and the lower side of the holding and fixing unit 21 is also used. In addition, as shown in FIG. 7 (E) as an embodiment of claim 6, two clamping holding portions 21 which are respectively clamped and fixed to, for example, two joint joint portions 17 of the deep foundation pile frame body 15, and It is possible to use a connecting member 20E integrally including, for example, two non-sandwiching portions 22 adjacent to each other. In addition, as an embodiment of claim 10, FIG.
As shown in (f), the holding and fixing part 2 is attached to each joint joint part 17.
While only one connecting member 20F is sandwiched and fixed, an auxiliary plate 22 ″, which is another member as a non-sandwiched portion, can be arranged and joined between the upper and lower connecting members 20F.

As an embodiment of claim 11, FIG.
As shown in (g), a through member 25 for connecting and reinforcing each connecting member (for example, connecting member 20A in the illustrated example) clamped and fixed to the deep foundation pile frame body 15 can be provided. in this case,
The through member 25 may have a depth that extends further below the earth retaining material 13. In addition, as an embodiment of claim 12, FIG.
As shown in (h), the holding and fixing portion 2 is attached to each joint joint portion 17.
It is also possible to sandwich and fix the connecting member 20F consisting of only one and to provide the through member 25 for connecting and reinforcing each connecting member 20F. In this case, the through member 25 also serves as an engaging means for engaging the vertically adjacent connecting members.

The earth retaining material 13 may be directly fixed to the connecting member 20 fixed to the deep foundation pile frame 15, but may be connected to the through member 25. When a member having a groove-shaped cross section is used as the through member 25 as shown in FIG. 1, the both ends of the earth retaining material 13 are simply fitted into the groove to connect the earth retaining material 13 to the connecting member 20. Installation is done. Also, bolt connection and other connection methods are possible. Earth retaining material 13
For example, a concrete panel, a steel horizontal sheet pile, or a wooden horizontal sheet pile can be used. The height of one piece of the soil retaining material 13 shown in FIG. 6 is half the height of the liner plate 14, but the height is arbitrary.

[0013]

According to the present invention, when a plurality of liner plates are circumferentially and vertically joined to each other to form a cylindrical deep foundation pile frame body, the deep foundation corresponding to the earth retaining material connecting position is formed. Since the connecting member is sandwiched and fixed at every other joint of the pile frame and the earth retaining material is connected through this connecting member, special processing such as a grooved liner plate is required. It became possible to connect the earth retaining materials with an extremely simple structure without using a liner plate as described above, and it was possible to improve the workability and reduce the cost of the deep foundation pile type earth retaining wall.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a deep foundation pile type earth retaining wall of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

3 is a perspective view of a deep foundation pile portion in FIG. 1. FIG.

4 (a) is an exploded perspective view showing an enlarged main part of FIG. 3, and FIG. 4 (b) is a side view of the connecting plate in FIG. 4 (a).

FIG. 5 is a cross-sectional view of the deep foundation pile type earth retaining wall.

FIG. 6 is a front view of the deep foundation pile type earth retaining wall.

7A and 7B are diagrams illustrating various aspects of the connecting member according to the present invention. FIG. 7A is a diagram corresponding to claim 2, FIG. 7B is a diagram corresponding to claim 3, and FIG. (C) is claim 4
(F) corresponds to claim 6, (f) corresponds to claim 10, and (d) corresponds to claim 5. (G) is a diagram corresponding to claim 11, and FIG. (H) is a diagram corresponding to claim 12.

FIG. 8 is a diagram illustrating an example of an engaging unit that connects the connecting members.

FIG. 9 is a view for explaining another embodiment of the engaging means between the connecting members.

FIG. 10 is a plan view showing a conventional deep foundation pile type earth retaining wall.

[Explanation of symbols]

11 Deep foundation pile type earth retaining wall 12 Deep foundation pile 13 Earth retaining material 14 Liner plate 14b Flat flange 15 Deep foundation pile frame body 15a One-step cylindrical frame body 16 Concrete 17 Joint joint portion 18 Bolts 20, 20A, 20B, 20C, 20D, 20E, 20
F Connection member 21 Clamping fixing part 22 Non-clamping part 24 Joint plate 25 Through member

Claims (13)

[Claims] 1. A single-stage cylindrical frame body, which is formed by joining a plurality of arc-shaped liner plates in the circumferential direction, is joined in a plurality of stages vertically so that the joints in the circumferential direction are arranged in a staggered manner. And a plurality of deep foundation pile frames that are arranged at intervals and sandwiched between adjacent deep foundation pile frames that are present at every other stage and are opposed to the joint joints. A connecting member having a fixing portion, an engaging means for engaging the upper and lower connecting members of each deep foundation pile frame body, and both ends directly or indirectly connected to the connecting member of the adjacent deep foundation pile frame body. A deep foundation pile retaining wall, which is characterized by having an earth retaining material. 2. The connecting member includes a nipping and fixing portion corresponding to the height of the liner plate in one step, and a non-nipping portion extending below the nipping and fixing portion by the height of the liner plate in approximately one step. The deep foundation pile type earth retaining wall according to claim 1, characterized in that. 3. The connecting member includes a nipping and fixing portion corresponding to the height of the liner plate in one step, and a non-nipping portion extending above the nipping and fixing portion by the height of the liner plate in one step. The deep foundation pile type earth retaining wall according to claim 1, characterized in that. 4. The holding member includes a holding and fixing portion corresponding to the height of the liner plate in one step, and upper and lower non-holding portions extending substantially one step above and below the holding and fixing portion by the height of the liner plate. The deep foundation pile type earth retaining wall according to claim 1, further comprising: 5. The holding member includes a holding and fixing portion corresponding to the height of the one-stage liner plate and upper and lower non-holding portions extending above and below the holding and fixing portion by approximately half the height of the one-stage liner plate. 2. The deep foundation pile type earth retaining wall according to claim 1, characterized in that the non-holding portions of the upper and lower connecting members facing each other are engaged with each other. 6. The connecting member is integrally formed with a plurality of sandwiching and fixing portions sandwiched and fixed to joint joints of a plurality of stages of liner plates, and one or two or more non-sandwiching portions existing between the sandwiching and fixing portions. The deep foundation pile type earth retaining wall according to claim 1, characterized in that 7. The deep foundation pile-type earth retaining wall according to claim 1, wherein the connecting member includes only a sandwiching and fixing portion having a height corresponding to the height of the liner plate in one step. 8. The engaging means fixes the holding and fixing portion of one connecting member of the upper and lower connecting members and the end portion of the non-holding portion of the other connecting member by welding or bolting to each other. The deep foundation pile type earth retaining wall according to claim 1. 9. The engaging means includes a holding and fixing portion of one of the upper and lower connecting members and an end portion of the non-holding portion of the other connecting member, and an end portion of the non-holding portion is grounded. The deep foundation pile type earth retaining wall according to claim 1, characterized in that it is simply wrapped so as to come to the mountain side. 10. A connecting member consisting of only a holding and fixing part having a height corresponding to the height of a single-stage liner plate is clamped and fixed to each joint of the deep foundation pile frame, and a non-connecting member is provided between the upper and lower connecting members. The deep foundation pile type earth retaining wall according to claim 1, further comprising an auxiliary plate arranged and joined as a holding portion. 11. The deep foundation pile type earth retaining wall according to claim 1, further comprising a through member for connecting and reinforcing each connecting member sandwiched and fixed to the deep foundation pile frame body. 12. A sandwiching member having only a sandwiching and fixing portion having a height corresponding to the height of a single-stage liner plate is sandwiched and fixed to each joint of the deep foundation pile frame body, and sandwiched in the deep foundation pile frame body. The deep foundation pile type earth retaining wall according to claim 1, further comprising a through member for connecting and reinforcing each fixed connecting member. 13. The deep foundation pile type earth retaining wall according to claim 11, wherein an end portion of an earth retaining material is connected to the through member.