JPS63568B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a retaining wall using concrete blocks, which allows an extremely strong retaining wall to be constructed in a short period of time.

The block used in this invention is rectangular, 1.5 meters long, 0.666 meters wide, and 0.350 meters thick.
In the case of a square meter, it is about 1 square meter, and its weight is about 700 to 800 kg. However, the size is not limited to the above-mentioned dimensions, and may include extremely large ones or somewhat smaller ones.

Recently, along with the development of our country's land, river embankments,
BACKGROUND OF THE INVENTION The construction of retaining walls using concrete blocks in civil engineering construction works such as road closures and residential land development has come to play an important role in preventing damage to the natural environment, and regulations are becoming stricter.

In particular, the destruction of retaining walls due to disasters such as earthquakes and heavy rain has become a problem, and there has been a demand for retaining walls that are strong and safe.

However, what has traditionally been used as a retaining wall is 7 to 11 small concrete blocks per square meter, and in order to construct a retaining wall using these concrete blocks, it is necessary to
The blocks are stacked accurately, and the joints of the blocks are joined using concrete shells.

However, even if the joints are connected using concrete, it is not possible to construct a retaining wall with sufficient strength because the concrete lacks adhesive strength.

Furthermore, building a retaining wall by stacking small concrete blocks requires a lot of manpower and skill, but in reality there is a shortage of specialized and general workers.
The reality is that we are unable to meet requests for early completion.

In view of the above-mentioned circumstances, this invention was developed as a result of research on a method that can quickly construct strong retaining walls.
Instead of using 11 concrete blocks, we now use one large block, and its size and weight make it possible to build a strong retaining wall quickly and mechanically without the need for human labor. We have developed a method that can do this.

The present invention will be described below based on the illustrated embodiment. Reference numeral 1 denotes a rectangular foundation concrete block in which the lower ends of vertical reinforcing bars 2, 2 are buried, and the longitudinal reinforcing bars 2, 2 are arranged at regular intervals in this embodiment. 1 and bury the lower end in the foundation concrete block 1, and extend upward from the upper end surface of the foundation concrete block 1 at a certain angle so that it protrudes at or above the height of the retaining wall. .

In addition, the upper end surface 3 of the foundation concrete block 1
are formed perpendicularly to the longitudinal reinforcing bars 2, 2, and concave grooves 4, 4 are formed in the vertical direction on both sides of the foundation concrete block 1, and hooks 5, 5 are formed in the concave grooves 4, 4. to protrude.

The basic concrete block 1 constructed as described above includes hooks 5, 5 whose concave grooves 4 are butted against each other, and whose heads collide or are close to each other.
A pin 6 is inserted between them to connect them.

On the other hand, chestnut stone layers 7a and 7b are formed on the slope and bottom surface on which the retaining wall is to be constructed, and foundation concrete 8 is cast on the chestnut stone layer 7b formed on the bottom surface, and the foundation concrete 8 is filled with the The lower part of the connected foundation concrete blocks 1... is buried and fixed as shown below.

The concrete block 9 used in the present invention has a rectangular shape and has a slope 10 on the front, and an upper end surface 11.
A semicircular protrusion 12 is formed along the longitudinal direction, and a semicircular recess 14 is further formed on the lower end surface 13 along the longitudinal direction.

Furthermore, vertical grooves 16, 16 are formed on the back surface 15 of the concrete block 9 at regular intervals l.
This vertical groove 16 is formed from a vertical chamber 17 formed in the block, a vertical opening 18 formed in a series from the upper end surface to the lower end surface on the back surface 15, and a passage 19 that communicates the chamber 17. The chamber 17 has an elliptical shape with its long axis running in a direction perpendicular to the thickness direction of the concrete block 9, and the passage 19 widens from the opening 18 toward the chamber 17. There is.

The concrete block 9 constructed as described above is first placed on the upper end face 3 of the foundation concrete block, and then slid to form the vertical groove 1.
Vertical reinforcing bars 2... planted on the foundation concrete block are positioned in front of the openings 18... of 6....

Next, the concrete blocks 9 are moved rearward so that the vertical reinforcing bars 2 are inserted into the chambers 17 from the openings 18 through the paths 19 that widen toward the end.

Further, on the upper end surface 11... of this concrete block 9..., another concrete block 9...
, and open the openings 18 of the vertical grooves 16 in the same manner as above.
. . slide until it is located in front of the vertical reinforcing bar 2 . . . , and further move the vertical reinforcing bar 2 . . . to be inserted into the chamber 17 . . Then, a gap 20 is formed between the back surface 15 of the concrete block 9 and the rock layer 7a formed on the slope on which the retaining wall is to be constructed, and the blocks are stacked one after another, and the gap 20 is filled with filler concrete. Pour in.

The interfill concrete poured into the gap 20 is
While flowing down within the gap 20, the vertical groove opening 18 formed on the back side of the concrete block...
From there, the chambers 17 are filled through passages 19 and so on. Therefore, the gap 20 and the vertical groove 16...
Intermediate concrete layers 21a and 21b are formed on.

As described above, the retaining wall according to the present invention is constructed. Furthermore, since a filler concrete layer 21b is formed inside the vertical grooves 16, the mechanical strength is increased.

Since the passage 19 of the vertical groove 16 widens toward the chamber 17 from the opening 18, the filler concrete injected from the opening 18 can be smoothly poured into the chamber 17. If the 16 chambers 17 are shaped like a cone, the filler concrete poured as described above can flow down extremely smoothly and fill the chambers 17.

Moreover, since the chamber 17 has an elliptical shape with its long axis in the direction perpendicular to the thickness direction of the concrete block 9, the chamber 17 is formed in the gap 20 with the filler concrete layer 21b formed in the chamber 17 of the vertical groove 16. Since the filled concrete blocks 21a and 21a are firmly connected and the concrete blocks 21b do not separate from the vertical grooves 16, the stacked concrete blocks do not break.

Further, according to the present invention, even if the concrete blocks are large, it is possible to stack them using mechanical power such as a forklift, and the chambers 17 of the vertical grooves 16 are connected to the concrete through the passages 19. Opening 18 formed on the back of the block
Since the vertical reinforcing bars 2 are in communication with each other, there is no need to lift the concrete block to the upper end of the vertical reinforcing bars 2 even when inserting the vertical reinforcing bars 2 into the vertical groove chamber 17.
All you have to do is slide the concrete block until the vertical reinforcing bar 2 is located in front of the opening 18, and then move the concrete block so as to introduce the vertical reinforcing bar 2 into the chamber 17 through the widening passage 19. The stacking work can be done easily and labor-savingly, and a strong retaining wall can be constructed in a short period of time by a small number of people.

Although the embodiment shown in the drawings uses a large rectangular concrete block, it is of course possible to apply the present invention to a square concrete block.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a laminated state showing an embodiment of the present invention, Fig. 2 is a side view of the same as above, Fig. 3 is a plan view of the concrete block, and Fig. 4 is a rear view of the same as above. It is. 1...Foundation concrete block, 2...Vertical reinforcement, 8...Foundation concrete, 9...Concrete block, 16...Vertical groove, 17...Room, 18...
...Opening, 19...Passage.

Claims (1)

[Claims] 1 A foundation concrete block with vertical reinforcing bars planted at regular intervals is fixed on the foundation concrete, and on this foundation concrete block there are vertical openings formed in a series from the top end face to the bottom end face on the back side. Concrete blocks each having a vertical groove formed by a chamber having an elliptical cross section whose major axis is in a direction perpendicular to the thickness direction and communicating with each other by a path that widens toward the end from the opening to the chamber are stacked together, The vertical reinforcing bars are installed in the vertical groove chamber of each concrete block.
At the same time, a gap is formed between the back surface of each concrete block and the rock layer formed on the slope, and filler concrete is poured into this gap, and this filler concrete is poured into each concrete block. A retaining wall construction method using concrete blocks, characterized by filling the vertical grooves of the concrete blocks.