JPH0742706B2 - 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 Publication 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, and the upright vertical reinforcing bars are arranged in two rows in the front and rear at regular intervals in the lateral direction,
By arranging the blocks having the first reinforcing bar insertion holes in the left and right directions in parallel while inserting the first reinforcing bar insertion holes in the front and rear vertical reinforcing bars described above, parallel double block walls are formed at regular intervals. Connect the front and rear block walls by constructing the connecting material that is configured in the front and rear and has the longitudinal second reinforcing bar insertion holes in the front and back while inserting the second reinforcing bar insertion holes through the longitudinal reinforcing bars in the front row and the longitudinal reinforcing bars in the rear row. The present invention relates to a retaining wall construction method using block walls, which is characterized in that

<Examples> Examples of the present invention will be described below with reference to the drawings.

The present invention constructs a retaining wall by arranging a block 2 and a connecting member 3 side by side with a vertical reinforcing bar 1 standing upright from a basic concrete as a guide.

First, as shown in FIG. 1, vertical reinforcing bars 1 standing upright from a foundation concrete 4 are arranged at equal intervals in the lateral direction in a row substantially parallel to the slope 5 and in two rows before and after the foundation plate material 6 Project from the top surface of.

Next, the block 2 having the first reinforcing bar insertion holes 7, 7 in the vertical direction on the left and right sides is lifted by a crane or the like, and is installed in parallel while inserting the first reinforcing bar insertion hole 7 into the vertical reinforcing bar 1 described above. In this case, the blocks 2a arranged side by side by being guided by the vertical rebars 1a in the front row and the blocks 2b arranged side by side by being guided by the vertical rebars 1b in the rear row are spaced apart from each other by a predetermined distance as shown in FIG. The front and rear double block walls are formed so as to be displaced laterally by half the width.

Each of the blocks 2 described above has a lateral first convex portion 8 on the upper surface at the approximate center in the thickness direction, and a lateral direction that fits the first convex portion 8 on the lower surface at the approximate center in the thickness direction. Having a first recess 9 of
Also, on the left and right, the diameter gradually decreases from top to bottom.
Reinforcing bar insertion holes 7 are provided and vertical grooves 10 are formed on the left and right side surfaces.

Therefore, the blocks 2 are inserted in the vertical reinforcing bars 1 through the first reinforcing bar insertion holes 7 and are arranged side by side in a lateral direction so as to be placed on the upper surface of the base plate member 6 to form the lowermost block wall in the front and rear direction. . In this case, the front block wall and the rear block wall are kept at a constant distance.

When the block walls are formed in the front and back as described above, the second
As shown in FIG. 4 and FIG. 4, the connecting member 3 having the second longitudinal reinforcing bar insertion holes 11, 11 in the front and rear direction is provided in the front longitudinal reinforcing bars 1a and the rear longitudinal reinforcing bars 1b. , 11 are inserted and installed between the front and rear block walls. Connection material 3 mentioned above
Is installed in each reinforcing bar insertion hole of the front and rear blocks, whereby the front and rear block walls are separated by a constant distance on the upper surface.

The above-mentioned connecting member 3 is a concrete plate-like member, and has a second convex portion 12 that fits into the first concave portion 9 of the block 2 in the front and rear of its upper surface.
And a second concave portion that is fitted to the first convex portion 8 at the front and rear of the lower surface.
13 is provided, and the second convex portion 12 and the second concave portion 13 are provided.
The second rebar insertion holes 11, 11 are formed in the vertical direction at the position.

Therefore, the connecting member 3 inserts the second reinforcing bar insertion holes 11, 11 in the front and rear vertical reinforcing bars 1a, 1b, and fits the second recesses 13, 13 in the convex parts 8 on the upper surfaces of the front and rear block walls. Since the connection member 3 is placed on the upper surface of the block wall, the connection member 3 does not move in the front-rear direction.

Form the bottom block wall back and forth as above,
When the connecting member 3 is installed between the front and rear blocks on the left and right of the upper surface of each block, the second block wall from the bottom
Thus, the block wall is formed in the same manner as the lowermost block wall, the connecting material 3 is also installed on the upper surfaces of the block walls before and after the second stage from the bottom, and the block walls are constructed in the same manner from the bottom.

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
2 to 3 times the height of the block, and stack the blocks 2 along the slope in order and stack up to the top, insert the vertical reinforcing bars from the top into the reinforcing bar insertion holes 7 of each block communicating in the vertical direction,
This vertical rebar and the vertical rebar erected from the above-mentioned base plate material 6 are partially polymerized in the rebar insertion hole 7, and then the filling concrete 14 is injected from the rebar insertion hole 7 of the uppermost block 2 to The first reinforcing bar insertion hole 7 and the second reinforcing bar insertion hole 11 are filled with the filling concrete 14, and the blocks contacting in the vertical direction can be firmly bonded.

INDUSTRIAL APPLICABILITY The present invention is capable of constructing a high-strength block retaining wall along the slope as described above, and the construction is performed in the space between the front and rear double block walls or the space between the connecting members 3. In or after construction, fill the space of the block wall in the lowest stage with cast-in-place concrete 15 as in the illustrated embodiment,
The space above it may be filled with a filling material 16 such as rubble and earth and sand to integrate the block walls and the connecting material. In this case, the bottom block wall has extremely high strength due to cast-in-place concrete, and the other middle retaining walls have sufficient strength, though not as low as the bottom stage, and economical retention with excellent drainage. A wall can be formed.

Further, since the blocks 2 used in the present invention are arranged in double in the front and rear, the blocks 2 can be made thinner, lighter and smaller than the blocks used in the conventional block retaining wall, and can be carried and worked easily. It has excellent properties.

<Effects of the Invention> As described above, according to the present invention, a retaining wall having high stability and strength 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.

Furthermore, since a space is formed between the double blocks in the retaining wall constructed by the present invention, the strength of the retaining wall can be improved by filling it with cast-in-place concrete or rubble stone. A very economical retaining wall can be constructed according to the strength to be applied.

[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 is cut away, and FIG. 2 is a plan view showing a construction state of the present invention. FIG. 3 is a front view of the retaining wall, FIG. 4 is a partial perspective view showing a construction state of the present invention, and FIG. 5 is a perspective view of a connecting member.

Claims (1)

[Claims] 1. Upright vertical rebars (1 (1a, 1b) are arranged in two rows in the front and rear at regular intervals in the horizontal direction, and the first rebar insertion holes (7, 7) in the left and right direction are arranged vertically. By arranging the blocks (2) having the above-mentioned longitudinal reinforcing bars (1a, 1b) in parallel while inserting the first reinforcing bar insertion holes, parallel double block walls are spaced forward and backward at regular intervals. A connecting member (3) having a second reinforcing bar insertion hole (11, 11) in the front and rear direction is configured to be inserted through the second reinforcing bar insertion hole into the vertical reinforcing bar (1a) in the front row and the vertical reinforcing bar (1b) in the rear row. A retaining wall construction method using block walls, characterized by connecting the front and rear block walls by erection.