JPH0311331B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to retaining wall structures, and in particular to solidly constructing retaining walls to prevent collapse of foundations and walls of roads, railways, etc. due to embankment construction. , relates to a retaining wall structure in which each member can be easily handled.

[Conventional technology] Retaining walls are constructed in places where the slope exposed to the soil surface cannot maintain stability due to site, topographical, etc. conditions during road earthworks such as embankment and cutting. A structure adjacent to a river, lake, etc., that is built to protect slopes and secure roots when building roads or railways.

[Problems to be Solved by the Invention] By the way, in some of the retaining walls described above, a tensile material for preventing the retaining wall from collapsing is provided on the back side of the wall piece for the retaining wall via an attachment member. . However, since this mounting member and tensile material are directly fixed,
Due to compression of the embankment and displacement of the foundation ground, stress concentration occurs at the connection site between the mounting member and the tensile material, resulting in damage or breakage.

In addition, when applying embankment, tensile material may loosen, and if embankment is applied as it is, each wall piece will not be able to be tensioned evenly, resulting in variations in the retaining wall surface or There is an inconvenience that force is concentrated on the tensile material and the tensile material breaks, reducing the strength of the entire retaining wall.

Furthermore, some retaining walls are prevented from collapsing by using a steel band as a tensile material and supporting this steel band by the weight of the embankment. However, this steel strip has the disadvantage that when the embankment material is soft soil such as sandy soil or viscous soil, the coefficient of friction between the embankment and the tensile material becomes small, causing slippage. For this reason, the strength of the retaining wall decreases, causing the inconvenience that it may collapse.

Furthermore, in cases where the mounting member to be attached to the back surface of the wall piece is fixed integrally with the wall piece during manufacture of the wall piece, or where a protruding portion for attaching the mounting member is pre-formed on the wall piece, There are disadvantages in that each member is difficult to manufacture, the wall pieces are bulky and difficult to handle, and transportation and assembly are difficult.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned inconvenience, an object of the present invention is to provide a mounting member that protrudes and is connected to the flat portion so as to be separated from the flat portion that contacts the back surface of the lower wall piece and the back surface of the upper wall surface. The upper and lower ends of the flat part are provided with vertically extending parts so that the mounting member can move vertically when the supporting bolts for attaching the mounting member to the back of the wall piece are inserted. A long hole of a predetermined length is formed in the direction, one end of the rotating member is provided with a mounting bolt on the side surface so that it can freely rotate in the vertical direction, and the other end of the rotating member is attached to one side of the turnbuckle. At the same time, one end of the tensile material is screwed onto the other end of the turnbuckle, and an anchor plate for preventing the retaining wall from collapsing is provided on the other end of the tensile material, held by a nut. , the connection parts of each member and the tensile materials attached to the mounting members may be damaged or damaged due to the compression of the embankment or the displacement of the foundation ground.
In addition to preventing breakage, the slack in the tensile material is easily compensated for by turnbuckles, and the retaining wall is firmly supported by the tensile material and anchor plates that are fixed to the tensile material, improving the strength of the retaining wall. Moreover, it is an object of the present invention to realize a retaining wall structure in which each member can be manufactured easily, each member can be easily handled, and the retaining wall structure can be easily transported and assembled.

[Structure of the Invention] In order to achieve this object, the present invention provides a mounting member that connects the upper end of the back surface of the lower wall piece stacked in the vertical direction and the lower end of the back surface of the upper wall piece, and connects the mounting member to the lower wall piece. It is constituted by a flat part in contact with the back surface of the side wall piece and the back surface of the upper wall surface, and a side surface part that protrudes away from the wall piece and is connected to the flat part, and the mounting member is attached to the back surface of the wall piece. Elongated holes of a predetermined length are formed in the upper and lower ends of the planar part and are oriented in the vertical direction so that the mounting member can move in the vertical direction when the support bolt is inserted. One end of the rotating member is provided with a mounting bolt so that it can freely rotate in the vertical direction, and the other end of this rotating member is screwed onto one of the turnbuckles, and the other end of the turnbuckle is provided with a tensile material. One end of the tensile member is screwed, and the other end of the tensile member is provided with an anchor plate held by a nut to prevent the retaining wall from collapsing.

[Function] According to the configuration of the present invention, the flat part of the mounting member is in contact with the upper end of the back surface of the lower wall piece and the lower end of the back face of the upper wall piece stacked in the vertical direction, and the support bolts are inserted into the respective long holes of the flat part. Attach the mounting member to the back of the wall piece by inserting it, then attach one end of the rotating member to the side of the mounting member so that it can rotate with a mounting bolt, and attach one end of the turnbuckle to the other end of the rotating member. Then, one end of the tensile material is screwed to the other end of the turnbuckle, and an anchor plate is held and fixed to the other end of the tensile material by a nut. Therefore,
When embankment is applied, the mounting member can move vertically and the tensile material rotates vertically via the rotating member, so stress concentration can be avoided at the connection parts of each member, and each Damage to parts or connection parts of each part.
It can prevent breakage and improve pressure and earthquake resistance. In addition, each member is assembled using parts such as bolts and screws that are easy to install and remove.
To facilitate the manufacture of each member by independently manufacturing each member, and to easily transport the same members in a compact manner during transportation, or to easily perform the assembly work of each member during assembly. Can be done.

[Examples] Examples of the present invention will be described below in detail and specifically based on the drawings.

1 to 9 show embodiments of this invention. In the figure, 2 is a retaining wall. This retaining wall 2
is composed of a plurality of wall pieces 4 gathered together. As shown in FIG. 1, first, foundation material 8 is buried in the ground 6,
A foundation concrete 10 is provided on top of this foundation material 8.

This foundation cocrete 10 holds the wall piece 4-1 of the base layer portion of the retaining wall 2. A stepped portion 12-1 is formed on the upper end surface of this wall piece 4-1, and the end surface of another wall piece 4-2 laminated in the vertical direction is formed on this stepped portion 12-1 via a joint material 14. Formed stepped portion 1
2-2 is locked. The joint material 14 is the wall piece 4
-1 and wall piece 4-2 are allowed to expand and contract.

The upper end of the back surface of the lower wall piece 4-1 and the lower end of the back surface of the wall piece 4-2 are connected by a mounting member 16. This mounting member 16 is attached to the back surface of the wall piece 4-1 and the wall piece 4-1.
2, and a side surface 20 that protrudes away from the wall piece 4 and is connected to the flat surface 18, and has an L-shaped cross section.

Elongated holes 22, 22 having a predetermined length are formed in the upper and lower ends of the flat portion 18, oriented in the vertical direction.

Attachment members 16 are attached to the back of each of the wall pieces 4-1 and 4-2.
When mounting, the longitudinal direction of the mounting member 16 is the vertical direction, and when the support bolts 24, 24, which are the mounting means, are inserted into the elongated holes 22, 22 and mounted, the mounting member 16 is aligned with the length of the elongated hole 22. It is configured to be movable in the vertical direction within the L range. As is well known, the support bolts 24, 24 are attached to the wall pieces 4-1, 4-2.
It is screwed onto nuts etc. buried in the wall pieces 4-1 and 4.
-2.

Further, one end side of the rotating member 26 is provided on the side surface portion 20 of the mounting member 16 via a mounting bolt 28 so as to be rotatable within a vertical plane in the vertical direction. In other words, the rotating member 26 includes a support portion 30 and a connecting portion 32. The support portion 30 has one end pivotally attached to the side surface portion 20 by a mounting bolt 28, and the other end fixed to one end of the connecting portion 32 by welding or the like.

A threaded portion 34 is formed at the other end of the connecting portion 32 . The threaded portion 34 of this connecting portion 32 is screwed into one threaded hole 38-1 of the turnbuckle 36. One end of a tensile material 40 is screwed into the other screw hole 38-2 of the turnbuckle 36.

An anchor plate 42, which is a support means for preventing the retaining wall from collapsing, is attached to the other end of the hole material 40, and is attached to the nut 4.
6,46. That is, as shown in FIGS. 8 and 9, the anchor plate 42 is formed in a rectangular shape, and a hole 44 through which the tensile material 40 is inserted is formed in the center portion.

The holes 44 of the anchor plate 42 are inserted into the threaded portions of the other end of the hole tensioning material 40, and nuts 46-1, 4 are inserted.
6-2 to fix the anchor plate 42.

Further, in the vertical direction of the retaining wall 2, an embankment holding means is interposed between the lower tensile material 40 and the upper tensile material 40 in order to increase the stability of the embankment. That is, an earth anchor 50 is buried in the sloped ground 48, one end of a tensile material 52 is fixed to the earth anchor 50, and the other end of the tensile material 52 is extended to the vicinity of the retaining wall 2. A plurality of anchor plates 54 are fixed to this tensile material 52 at predetermined intervals. Thereby, destruction of the embankment 56 is more effectively prevented.

Next, the operation of this embodiment will be explained.

The flat portion 18 of the mounting member 16 is in contact with the upper end of the back surface of the lower wall piece 4-1 and the lower end of the back surface of the upper wall piece 4-2 stacked in the vertical direction, and support bolts 24 are inserted into the long holes 22, 22, respectively. , 24 and attach the mounting members 16 to the back surfaces of the wall pieces 4-1 and 4-2, respectively, and then,
The support part 30 of the rotating member 26 is rotatably attached to the side surface 20 of the mounting member 16 with a mounting bolt 28,
One of the turnbuckles 36 is screwed onto the threaded portion 34 of the connecting portion 32 of the rotating member 26, one end of the tensile material 40 is screwed onto the other end of the turnbuckle 36, and the other end of the tensile material 40 is screwed onto the other end of the turnbuckle 36. An anchor plate 42 is fixed to the end by being held between 46-1 and 46-2 using nuts.

When working on the base layer, the turnbuckles 36 are temporarily fixed, tensile material 40 is stretched, and embankment 56 is applied to the end side of the anchor plate 42, and then rolling pressure is performed to fix the anchor plate 42. . Next, on the back side of the wall piece 4 which has not yet been backfilled, the unevenness of the wall piece is adjusted using the turnbuckle 36. Finally, the turnbuckle 36 portion is backfilled and compacted to complete the embankment work for the base layer.

Hereinafter, similarly to the above base layer part, the second layer, the third layer,...
By constructing the wall surface by carrying out embankment work,
Vertical retaining wall 2 is constructed.

Therefore, when constructing the retaining wall 2, the work can be done on the back side of the retaining wall 2, so the work can be done easily and without any danger.

In addition, by constructing the retaining wall 2 vertically, the amount of embankment can be reduced and the cost is low.

Furthermore, variations in the retaining wall surface can be easily compensated for by the turnbuckles 36.

Furthermore, by making the entire mounting member 16 movable in the vertical direction and attaching the tensile material 40 via the rotating member 26 that rotates in a vertical plane, stress concentration at the connecting portion of each member can be reduced. This prevents damage and breakage of the mounting member 16 and tensile material 40, and improves pressure resistance and
It improves seismic resistance, and has a simple configuration, making maintenance and inspection easier.

Further, by arranging the anchor plates 42 in the vertical direction and applying the embankment 56, the tensile resistance force acting on the tensile material 40 can be increased.

Furthermore, as shown in FIG. 1, an earth anchor 50 is buried in the sloped ground 48, and a tensile member 52 having a plurality of anchor plates 54 is attached to the earth anchor 50, so that the ground and the retaining wall 2 are integrated. Therefore, the collapse of the retaining wall 2 can be more effectively prevented.

Furthermore, since the mounting member 16, the rotating member 26, the turnbuckle 36, and the anchor plate 42 are assembled using parts such as bolts or screws that are easy to install and remove, each part can be manufactured independently. It is possible to easily manufacture each part, to make it easier to handle each part, to easily transport the same parts in a compact manner during transport, or to easily perform the assembly work of each part during assembly. can.

Note that this invention is not limited to the above-mentioned embodiments,
Of course, various applications and modifications are possible.

For example, a tensile material 52 whose one end is attached to an earth anchor 50 buried in the sloped ground 48
It is possible to provide turnbuckles 36 as well as tensile material 40 attached to wall piece 4.

[Effects of the Invention] As is clear from the above detailed description, according to the present invention, a mounting member is provided that connects the upper back end of the lower wall piece stacked in the vertical direction and the lower back end of the upper wall piece, and the mounting member consists of a flat part in contact with the back of the lower wall piece and the back of the upper wall, and a side part that protrudes away from the wall piece and is connected to the flat part, and a support bolt for attaching the mounting member to the back of the wall piece. Elongated holes of a predetermined length are formed in the upper and lower ends of the flat part in order to allow the mounting member to move in the vertical direction when inserted, and the holes in the side part are vertically oriented and have a predetermined length. One end of the freely rotating member is provided with a mounting bolt, the other end of the rotating member is threaded onto one of the turnbuckles, and one end of the tensile material is threaded onto the other end of the turnbuckle. , An anchor plate is attached to the other end of the tensile material to prevent the retaining wall from collapsing, which is held by a nut to avoid stress concentration at the connecting parts of each member, and has excellent pressure and earthquake resistance, making it easy to install. Damage and breakage of components and tensile materials can be prevented.

In addition, during construction work, variations in the retaining wall surface can be easily compensated for with turnbuckles, improving work efficiency, and preventing force from being concentrated on specific tensile members, making it possible to increase the overall strength of the retaining wall. Strength can be improved.

Furthermore, by providing an anchor plate at the other end of the tensile material, no specific embankment material is required.
By balancing the earth pressure acting on the back of the retaining wall and the tensile resistance force of the anchor plate, it is possible to prevent the retaining wall from collapsing.

In addition, since each member is assembled using parts such as bolts and screws that are easy to install and remove, each member can be manufactured independently, making it easier to manufacture each member.
It also makes it easier to handle each component, allowing the same components to be compacted and easily transported during transportation.
Alternatively, each member can be easily assembled during assembly.

[Brief explanation of drawings]

1 to 9 show embodiments of the present invention, FIG. 1 is a schematic side view of a retaining wall, FIG. 2 is an enlarged side view showing the joined state of an upper wall piece and a lower wall piece, and FIG. Figure 3 is a perspective view showing the assembled state of the mounting member and rotating member, Figure 4 is a side view of the rotating member, Figure 5 is a bottom view of the rotating member in Figure 4, and Figure 6 is a turnbuckle. 7 is a side view of the turnbuckle in FIG. 6, FIG. 8 is a front view of the anchor plate, and FIG. 9 is a side view of the anchor plate fixed to the tensile member with nuts. In the figure, 2 is a retaining wall, 4 is a wall piece, 16 is a mounting member, 18 is a plane part, 20 is a side part, 22 is a long hole, 24 is a support bolt, 26 is a rotating member, 28 is a mounting bolt, 30 is a support part, 32 is a connecting part, 36
is a turnbuckle, 40 is a tensile member, and 42 is an anchor plate.

Claims (1)

[Claims] 1. A mounting member is provided that connects the upper end of the back surface of the lower wall piece stacked in the vertical direction and the lower end of the back surface of the upper wall piece, and this mounting member is connected to a flat part in contact with the back surface of the lower wall piece and the back surface of the upper wall surface. and a side surface part that protrudes away from the wall piece and is connected to the flat part, and when a support bolt for attaching the mounting member to the back surface of the wall piece is inserted, the mounting member is vertically moved. Elongated holes of a predetermined length are formed in the upper and lower ends of the plane part so as to be movable and are oriented in the vertical direction, and one end side of the rotating member is formed in the side part so as to be freely rotatable in the vertical direction. The other end of the rotating member is screwed onto one of the turnbuckles, and one end of the tensile material is screwed onto the other end of the turnbuckle. A retaining wall structure characterized in that an anchor plate for preventing collapse of the retaining wall is held at the end by a nut.