JPH0694674B2 - Retaining wall construction method using blocks - Google Patents

Description

TECHNICAL FIELD The present invention relates to a retaining wall construction method using blocks.

<Prior art> Recently, construction of retaining walls with concrete blocks in civil engineering construction work such as river bank protection, road detention, residential land development, etc. accompanying the national land development of Japan has an important role from the viewpoint of preventing the destruction of the natural environment. The regulations are becoming stricter.

In particular, destruction of the retaining wall due to disasters such as earthquakes and heavy rainfall has become a problem, and a retaining wall with high strength and safety has been demanded. However, in reality, due to severe economic conditions such as a shortage of specialized workers and general workers, labor costs and soaring materials, it is necessary to complete the work early.

As a method of constructing the above retaining wall, for example, Japanese Patent Publication Sho 61
As described in Japanese Patent No. 35335, the vertical rebars standing upright in a row at equal intervals in the lateral direction are used as guides, and blocks of a certain thickness are sequentially inserted into the rebar insertion holes while inserting the above vertical rebars. There is a way to stack.

The retaining wall constructed by the above method has high strength and excellent construction workability because the blocks arranged in the vertical direction are connected by a series of vertical reinforcing bars.

<Problems to be Solved by the Invention> However, particularly in a large retaining wall such as a slope, strong earth pressure acts on the lower portion of the retaining wall, but not too large on the upper portion. Further, for example, when it rains, water penetrates into the ground and a large concentrated load acts on the lower side of the slope, but a little load does not act on the upper side. Therefore,
The durability and strength required for the retaining wall are different in the vertical direction of the retaining wall, and the retaining wall constructed by the above conventional method has a certain strength in the vertical direction. The durability and strength required for and the strength of the retaining wall do not match.

When the thickness of the block to be used is thin and the thickness of the entire retaining wall is small, the strength may be insufficient especially in the lower part of the retaining wall. However, if the thickness of the block used is large and the thickness of the entire retaining wall is large, the strength is sufficient,
The transportability of the blocks and the workability of the retaining wall were poor, and the upper part of the retaining wall was economically wasted.

<Means for Solving the Problems> The present invention has been proposed in view of the above, in which upright vertical reinforcing bars are arranged in two rows in the front and rear at equal intervals in the horizontal direction, and the vertical reinforcing bars are arranged in the left and right directions. As for the block having the insertion holes, the block walls are arranged side by side in two rows while inserting the reinforcing bar insertion holes into the vertical reinforcing bars described above, and the connecting material is attached between the vertical reinforcing bars in the front row and the vertical reinforcing bars in the rear row. It provides a retaining wall construction method using blocks, which is characterized by the above.

<Example> Hereinafter, the retaining wall construction method of the present invention will be described based on examples of the drawings.

The present invention uses the vertical rebar 1 erected from the foundation as a guide.
A retaining wall is constructed by arranging the blocks 2 and the second blocks 3 side by side.

First, as shown in FIG. 1, the vertical reinforcing bars 1 which are erected upright on the basic concrete 4 are arranged at equal intervals in the lateral direction substantially parallel to the slope 5 and in two rows before and after the basic concrete 4. Of the base plate 6 installed on the upper surface of the base plate.

Next, the first block 2 on the front side and the second block 3 on the rear side, which have longitudinal reinforcing bar insertion holes 7 and 7 on the left and right, are suspended by a crane or the like, and the vertical rebar 1a in the front row and the vertical rebar 1b in the rear row are suspended. The first block 2 which is arranged in parallel in the left-right direction while inserting the reinforcing bar insertion holes 7 of the respective blocks into the front-rear direction
The second block 3 and the second block 3 are arranged so as to be displaced in the lateral direction by half the lateral width of the block, as shown in FIG.

Each of the first block 2 and the second block 3 described above is provided with a lateral convex portion 8 on the upper surface thereof, and a lateral concave portion 9 fitted on the convex portion 8 on the lower surface, and on the left and right sides is an upper portion. A reinforcing bar insertion hole 7 having a diameter that gradually decreases downward from is formed, and vertical grooves 10 are formed on the left and right side surfaces. Then, in the first block 2 arranged in the front row, the first notch portion 11 reaching from the reinforcing bar insertion hole 7 to the rear surface.
Is formed on the upper surface, and the second block 3 arranged in the rear row has
A second notch 12 that extends from the reinforcing bar insertion hole 7 to the front is formed on the upper surface.

Therefore, the blocks 2 and 3 are arranged side by side so that the reinforcing bar insertion hole 7 is inserted into the vertical reinforcing bar 1 and placed on the upper surface of the base plate member 6 to form the block wall at the lowermost stage in the front and rear direction. .

When the lowermost block wall is formed by the method as described above, the first block 2 of the first block 2 is formed on the upper surface of this block wall.
The notch 11 and the second notch 12 of the second block 3 are continuous to form a recess 13.

As shown in FIG. 2 and FIG. 3, the recess 13 has
Connecting material that connects the vertical rebar 1a in the front row and the vertical rebar 1b in the rear row
Wear 14. As a result, the first block 2 and the second block 3 that come into contact with each other in the front-rear direction are connected.

The connecting member 14 may be a ring-shaped reinforcing bar material as shown in FIG. 2, or a ring-shaped reinforcing bar material buried in a concrete plate material 15 as provided in the recess 13 of FIG. A connecting member 14 'having a structure in which the loop portion of the end portion of the plate member is projected from the front end and the rear end of the plate member may be used.
When it is installed inside 13, the recess 13 is provided so that the plate 15 can be fitted.
By setting the horizontal width of, it is possible to prevent the first block 2 and the second block 3 from shifting in the horizontal direction. In the illustrated embodiment, the connecting material 14 'is used for the concrete wall of the lower two steps, and the connecting material 14 is used for the concrete wall of the third step or more from the bottom.

As described above, after the connecting member 14 'is mounted in the recess 13 formed on the upper surface of the block wall at the bottom,
The block 2 and the second block 3 are laid up by inserting the reinforcing bar insertion hole 7 into the vertical reinforcing bar 1 according to the same method as that for forming the lowermost block wall described above, and the connecting member 14 'is placed on the upper surface thereof. Put on.

Thereafter, similarly, the blocks 2 and 3 and the connecting member 14 are sequentially arranged from the bottom to construct a multi-tiered block wall as shown in FIG.

In addition, in the present invention, for example, the length of the vertical reinforcing bar 1 erected from the basic concrete 4 and the basic plate member 6 is set to the block 2,
Make it about 2 to 3 times the height of 3 and stack blocks 2 and 3 in order along the slope and stack up to the top, then insert vertical reinforcing bars from above into each block's reinforcing bar insertion hole 7 communicating vertically , The vertical reinforcing bars and the vertical reinforcing bars erected from the above-mentioned base plate material 6 are partially polymerized in the reinforcing bar insertion holes 7, and then the reinforcing bar insertion holes 7 of the uppermost blocks 2 and 3 are used to fill the filling concrete 16
Is injected, and the reinforcing-bar insertion holes 7 and the recesses 13 are filled with the filling concrete 16, so that the blocks contacting in the vertical direction and the front-back direction can be firmly bonded. In this case, since each of the connecting members 14 and 14 'is filled with the filling concrete 16, the block walls arranged in front and behind can be firmly connected.

INDUSTRIAL APPLICABILITY The present invention can construct a block retaining wall having high strength as described above.

Further, according to the present invention, since the blocks are arranged in a front-rear double manner, for example, the thickness of the first block 2 is made thinner than the block used for the conventional block retaining wall, and the weight and the size are small and the portability is high. Also, the workability may be improved.
The thickness of the second block 3 may be set according to the required strength. As shown in FIG. 1, the lower two stages are formed to have the same thickness as the first block 2. , The first block 2 for the middle four steps above it
It is also possible to use the second block 3'which is formed even thinner. In this case, the strength of the four-tier block wall in the middle of the height is lower than that of the lower two-tier block wall, but the second block 3'is lighter than the second block 3 and can be formed at a low cost. As a result, the stability of the retaining wall and the economical efficiency of the member cost are improved.

Although the present invention has been described based on the embodiments of the drawings, the present invention is not limited to the above embodiments, and may be carried out in any manner unless the configuration described in the claims is changed. You can

<Effects of the Invention> As described above, according to the present invention, a high-strength retaining wall can be constructed by an extremely easy method.

In addition, since the present invention constructs a double block wall, compared with the conventional method of constructing a single row of block walls, the thickness and weight of the block to be used are thin, so that it is easy to carry and work. It is extremely highly effective.

Further, in the retaining wall constructed according to the present invention, the thickness of the second block arranged in the rear row may be increased or decreased according to the required strength, and the stability and economic efficiency of the retaining wall can be improved. .

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a side view in which a part of a retaining wall constructed according to the present invention has been cut away, and FIG. 2 is a perspective view showing a state of construction of the present invention. FIG. 3 is a plan view in which a part of the retaining wall is cut away, FIG. 4 is a front view in which a part of the constructed retaining wall is cut out, and FIG. 5 is a perspective view of the first block.

Claims (1)

[Claims] Claims: 1. Upright vertical rebars are arranged in two rows in the front and rear at equal intervals in the horizontal direction, and blocks having vertical rebar insertion holes in the left and right are provided in the above-mentioned two rows of vertical rebars. A retaining wall construction method using blocks, wherein block walls are arranged in two rows in front and back while inserting through insertion holes, and connecting members are mounted between the vertical rebars in the front row and the vertical rebars in the rear row.