JPH0250254B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a retaining wall support structure, and in particular, a structure for forming a vertical retaining wall using retaining wall blocks and supporting the vertical retaining wall against the embankment pressure. In particular, it relates to support structures for retaining walls that maintain the foundations and walls of roads and railways through embankment construction.

[Technical Background of the Invention] Generally, when constructing an embankment, a retaining wall is formed to reinforce and exteriorize the embankment, and this retaining wall includes an inclined retaining wall and a vertical retaining wall. When forming this vertical retaining wall, concrete blocks, steel plates, or mesh steel are used, and the vertical retaining wall is supported from the back of the retaining wall by support means made of tensile material against the embankment pressure. There is.

This contributes to the maintenance of the foundations and walls of roads and railways with severe ups and downs.

[Problems with the Background Art] By the way, in the conventional support structure for a vertical retaining wall, one end of the band-shaped body serving as the supporting means is directly attached to a connection member made of a stud or plate-shaped body fixed to the retaining wall block. This strip was buried in the embankment, and the vertical retaining wall was supported from the back against the embankment pressure by the pull-out friction force of the strip.

In addition, when stacking the retaining wall blocks,
As a measure for temporarily fixing each block, uneven shapes formed on the outer peripheral surface of the block and reinforcing bars passing through holes drilled in the vertical direction of the block are used.

However, the magnitude of the pull-out friction force of the strip varies depending on the soil quality of the embankment, and especially when the pull-out friction force is small in sandy soil, there is a risk that the vertical retaining wall will collapse due to the embankment pressure.

In addition, if blocks of around 1000 kg are piled up using only uneven joints and reinforcing bars on the joint surfaces of the blocks for temporary fixing, there is a risk that the blocks will collapse during the stacking process, which will reduce the safety and reliability of the block stacking process. There is an inconvenience that the value decreases.

[Object of the Invention] Therefore, in order to eliminate the above-mentioned inconvenience, the object of the present invention is to provide an L-shaped cross-section for engaging the upper and lower blocks with stud bolts that appear at two points, upper and lower, on the back of the retaining wall block. The blocks are temporarily fixed with L-shaped steel members to prevent the blocks from collapsing during pile-up work, increasing the safety and reliability of the pile-up work, and supporting vertical retaining walls regardless of the soil quality of the embankment. The object of the present invention is to realize a supporting structure for a retaining wall that can be firmly supported.

[Structure of the Invention] In order to achieve this object, the present invention has a front face shape that has joint arms at an upper portion on one end side and a lower portion on the other end side of a flat plate portion, and penetrates through these joint arms in the vertical direction. In a retaining wall support structure in which a plurality of Z-shaped retaining wall blocks each having a hole are stacked to form a vertical retaining wall, the outer periphery of the block is provided with both the front and back sides of the block aligned with the desired diagonal line. A joint stepped portion is formed in the shape of a slope portion made to appear by parallel movement in the direction, and a first flat portion and a second flat portion positioned to sandwich this slope portion, and the joining step portion is formed at two points above and below the back surface of the block. At the same time, an L-shaped steel member with an L-shaped cross section is provided to engage only the upper stud bolt of the lower block of the stud bolt and the lower stud bolt of the upper block, and one end of the cable is attached to this L-shaped steel member. It is characterized in that a support means is provided on the other end of the cable to support the vertical retaining wall.

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

1 to 7 show a first embodiment of the invention. In FIGS. 1 and 2, 2 is a retaining wall, and 4 is a retaining wall block. This retaining wall block 4 is formed into a Z-shape from the front by a flat plate part 6 made of a plane and joint arms 8 formed at both ends of the flat plate part 6 to be mutually joined. In other words,
Joint arm portions 8x and 8y are provided at an upper portion of one side end and a lower portion of the other side end of the flat plate portion 6, respectively. In addition, holes 10x and 10y are formed in the joint arms 8x and 8y of the block 4, respectively, and a joint stepped portion 12 is formed in the joint 12 of the block 2.
form a. This joining step portion 12a includes a slope portion 14 that appears by moving both the front and back surfaces of the block 2 in parallel in a desired diagonal direction, and
It consists of a first flat part 16 and a second flat part 18 positioned to sandwich 4.

Further, inside the block 4, there is a stud bolt 20.
A receiving portion 22 of the block 4 is embedded, and a stud bolt 20 is screwed into this receiving portion 22 from the back side of the block 4. When stacking blocks 4, as shown in FIG.
Joining step portions 12a, 12 of two blocks 4, 4
As shown in FIG. The shaped steel material 28 is fixed with a nut 30, and the two blocks 4 are connected in the vertical direction for temporary fixing. That is, as shown in FIG. 6, only the upper stud 20a-1 of the lower block 4-1 and the lower stud 20b-2 of the upper block 42 are connected by the L-shaped steel member 28.

In the stacking work of the block 4, the fifth and sixth
As shown in the figure, first, the base layer block 4 is placed at a desired position, and the L-shaped steel material 2 on the back side of this block 4 is placed.
8, one end of the cable 34 is connected to the first turnbuckle 36.
Attach via. Further, an anchor plate 38 serving as a support means is attached to the other end of the cable 34 via a second turnbuckle 40. At this time, depending on the embankment quality, a plurality of cables, for example three cables 34-1, 34-
2, 34-3 are gathered into one with the gathering material 37, and 1
The retaining wall is supported using two anchor plates 38. Then, while adjusting the second turnbuckle 40, the lower end of the anchor plate 38 is pushed into the ground 42 or the embankment surface 42a so that the plane part of the block 4 and the anchor plate 38 are parallel, and the embankment is placed on the anchor plate 38 part. Then, the anchor plate 38 is buried by embankment. Then, the length of the cable 34 is adjusted by the first turnbuckle 36, and the inclination of the block 4 is corrected. Finally, the cable 34 and first turnbuckle 36 portions are filled with earth and compacted to complete the earthwork of the foundation.

Thereafter, while temporarily fixing the block 4 with the stud bolts 20 and the L-shaped steel members 28, the second and third layers in the upper direction are formed, and finally the vertical retaining wall 2 is constructed.

In this way, by completely temporarily fixing the blocks 4 during stacking work, the blocks can be prevented from falling down, and safe stacking work can be performed.

In addition, the embankment can be stabilized by balancing the embankment pressure acting on the back side of the vertical retaining wall 2 with the tensile resistance force of the anchor plate 38 attached via the cables 34. It is possible to prevent the retaining wall from collapsing regardless of the quality of the embankment, such as soil.

Furthermore, since there are many shared parts of the stud bolts 20 and the L-shaped steel members 28, diversification of parts can be prevented and stacking work can be facilitated, which is advantageous in practice.

In addition, since the structure of the stud bolt 20 and L-shaped steel material 28 for temporarily fixing the blocks 4 during stacking work is simple, it contributes to improving the temporary fixing workability and can reduce the cost. Economically advantageous.

Furthermore, an anchor plate 38 is attached to the other end of the cable 34.
By providing a vertical retaining wall, the vertical retaining wall can be firmly supported regardless of the soil quality, and there is no risk of the vertical retaining wall collapsing, which increases safety, compared to a strip whose pull-out friction force changes depending on the soil quality. can be improved.

FIG. 8 shows a second embodiment of the invention. In this second embodiment, parts that perform the same functions as those in the first embodiment described above are given the same reference numerals and will be explained.

The features of this second embodiment are as follows. That is, there are U-shaped studs 50 buried vertically in the blocks 4 and L-shaped steel members 38 interposed between the U-shaped studs 50 of the stacked blocks 4.

That is, as shown in FIG. 8, the lower block 4
The upper part 50a-1 of the U-shaped stud 50-1, which is the upper stud of -1, and the upper block 4-2
U-shaped stud bolt 50 which is the lower stud bolt of
-2 is connected to the lower part 50b-2 by an L-shaped steel member 28.

If configured as in the second embodiment, the strength of the U-shaped stud 50 is increased, and the block 4 and the cable 3
4, and contributes to supporting the vertical retaining wall.

Note that this invention is not limited to the above-mentioned first and second embodiments, and can be modified in various ways.

For example, in the first embodiment of the present invention, a plurality of cables, for example three cables 34-1, 34-2, 34
-3 can be gathered into one by the gathering material 52, and one anchor plate 38 can be used to support the retaining wall. Furthermore, as shown in Figure 11,
In embankments with low tensile resistance, a plurality of anchor plates 38 are attached to one cable 34 at desired intervals.
It is also possible to have a configuration in which the For this reason,
The supporting structure of the retaining wall can be changed in various ways depending on the quality of the embankment, making it possible to construct a vertical retaining wall according to the construction site conditions, and making the construction easier.

[Effects of the Invention] As described above in detail, according to the present invention, the front shape has joint arms at the upper part on one end side and the lower part at the other end of the flat plate part, and these joint arms have a vertical direction. On the outer periphery of a retaining wall block formed in a Z-shape, each having a through-hole, a slope portion is formed by moving both the front and back sides of the block in parallel in a desired diagonal direction, and the block is positioned to sandwich this slope portion. A joining step part is formed in the shape of a first flat part and a second flat part, and stud bolts are provided that appear at two points, upper and lower, on the back of the block, and the stud bolts are connected to the upper stud bolt of the lower block and the upper stud bolt of the upper block. An L-shaped steel member with an L-shaped cross section that engages only the lower stud bolt is provided, one end of the cable is fixed to this L-shaped steel member, and the other end of the cable is provided with support means for supporting the vertical retaining wall. As a result, temporary fixing can be performed using stud bolts and L-beam steel on the back of the block, which prevents the block from falling down during stacking work, improving the safety and reliability of stacking work. , the vertical retaining wall can be firmly supported by the supporting means regardless of the soil quality of the embankment.

Further, since there are many common parts between the stud bolt and the L-shaped steel material, diversification of parts can be prevented and stacking work can be facilitated, which is advantageous in practice.

Furthermore, since the structure of the stud bolt and L-shaped steel material for temporary fixing during block stacking work is simple, it contributes to improving the temporary fixing work efficiency, and the cost can be reduced, making it economical. advantageous to

[Brief explanation of drawings]

1 to 7 show a first embodiment of the present invention, FIG. 1 is a front view of the block, FIG. 2 is a plan view of the block, and FIG. 3 is an enlarged plan view of the main parts showing the state of joining of the side ends of the block. 4 is a perspective view of the retaining wall, FIG. 5 is a longitudinal cross-sectional side view of the retaining wall, FIG. 6 is an enlarged cross-sectional view of a main part showing a connecting member, and FIG. 7 is a schematic diagram of an anchor plate. FIG. 8 is an enlarged sectional view of a main part of a connecting member showing a second embodiment of the present invention. FIG. 9 is a schematic view showing another embodiment of the anchor plate as the supporting means. In the figure, 2 is a retaining wall, 4 is a block, 6 is a flat plate part, 8 is a joint arm part, 10x, 10y are holes, 1
2 is a joint surface, 12a is a joint step portion, 14 is a slope portion, 16, 18 are first and second flat portions, 20 is a stud bolt, 24 is a reinforcing bar, 28 is an L-shaped steel material, 34 is a cable, 38 is an anchor plate, and 50 is a U-shaped stud bolt.

Claims (1)

[Claims] 1. For retaining walls whose front shape is formed into a Z-shape, which has connecting arms on the upper part of one end and the lower part of the other end of the flat plate part, and has holes penetrating the joint arms in the vertical direction. In a support structure for a retaining wall formed by stacking a plurality of blocks to form a vertical retaining wall, the outer periphery of the block includes a slope portion that appears by moving both the front and back sides of the block in parallel in a desired diagonal direction, and this slope portion. A joint stepped portion is formed in the shape of a first flat portion and a second flat portion positioned to sandwich the block, and stud bolts are provided that appear at two points on the upper and lower sides of the back surface of the block, and the stud bolts are connected to the upper portion of the lower block. An L-shaped steel member with an L-shaped cross section is provided to engage only the stud bolt and the lower stud bolt of the upper block, and one end of the cable is fixed to this L-shaped steel member, and a vertical retaining wall is attached to the other end of the cable. A support structure for a retaining wall, characterized in that a support means for supporting the retaining wall is provided.