JPS6135335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a retaining wall construction method using blocks.

Recently, the construction of retaining walls using concrete blocks has come to play an important role in preventing damage to the natural environment during civil engineering construction work such as river revetments, road closures, and residential land development as part of Japan's national land development.
Regulations are also 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, in reality, construction work must be completed as quickly as possible due to severe economic conditions such as a shortage of specialized and general workers and rising labor and material costs.

Conventionally, it was difficult to accurately match the top surface of the foundation concrete poured on site to the slope of the retaining wall, so the stacking angle had to be corrected each time the blocks were stacked. This not only makes the work complicated, but also makes it impossible to quickly construct a strong retaining wall that is free from collapse. Furthermore, when stacking blocks directly on the foundation concrete, the stacking work cannot be started until the foundation concrete has cured, and it is extremely troublesome work to make the top surface of the foundation concrete flush.

The present invention has been proposed in view of the above-mentioned problems.The present invention has been proposed by providing through-holes for reinforcing bars in the foundation concrete plate on the upper surface of the foundation concrete in which horizontal reinforcing bars are arranged and vertical reinforcing bars are stood upright at intervals of the reinforcing bars in the blocks. Install the foundation concrete plates in parallel while passing them through the vertical reinforcing bars so that the top surface of each foundation concrete plate is flush and accurately aligned with the angle according to the slope of the retaining wall, using the vertical reinforcing bars mentioned above as a guide. , while inserting the vertical reinforcing bars into the reinforcing bars of the lifted blocks, place the lowest block on the top of the foundation concrete plate, then place the upper blocks on top of this block in order, and insert the reinforcing bars through the vertical reinforcing bars. We propose a retaining wall construction method that is characterized by stacking up the retaining wall.
This is what we provide.

The present invention will be explained below.

If the block used in the construction method of this invention is rectangular, it is 1.5 meters long, 0.666 meters wide, and 0.350 meters thick, and if it is square, it is 1 square meter in size and weighs approximately
700~800Kg can be used.

However, the size is not limited to the above dimensions, and may be even larger or somewhat smaller.

To construct a retaining wall using the blocks described above, horizontal reinforcing bars are placed and through holes for reinforcing reinforcing bars are opened on the top surface of the foundation concrete with vertical reinforcing bars standing upright at intervals of the blocks' reinforcing holes. Insert the vertical reinforcing bars through the reinforcing bar insertion holes in the foundation concrete plate and install them in parallel.

This foundation concrete plate is used to ensure an accurate slope for the blocks to be stacked on top and to receive the blocks, so it must be installed at an accurate angle and flush. The vertical reinforcing bars described above serve as guides for the blocks to be stacked on top of the foundation concrete plate. Therefore, each block is provided with an insertion hole through which a vertical reinforcing bar can easily pass. Since these blocks are stacked on top of the foundation concrete plates, they are stacked by machine so that the center of the upper block is located on the adjacent portion of the foundation concrete plate or block located below.

The embodiment shown in the drawing shows a case where a rectangular block is used, in which reinforcing bars 2 are laid horizontally in the center of the foundation concrete 1, and the lower ends of vertical reinforcing bars 6 arranged at regular intervals l are latched to the horizontal reinforcing bars 2. The vertical reinforcing bars 6 are buried so as to protrude above the height of the retaining wall.
On the upper surface of the above-mentioned foundation concrete 1, foundation concrete plates 5 with holes 4 provided at positions corresponding to the bases 3 of the vertical reinforcing bars are installed in parallel in a manner that accurately matches the slope angle of the blocks to be stacked.

Next, the angle of the protruding portion of the vertical reinforcing bars 6 is correctly adjusted to the slope of the retaining wall, and filler concrete is poured into the hole 4. The rectangular block 7 is 1.5 meters long, 0.666 meters wide, and 0.350 meters thick, weighs about 800 kg, and has two reinforcing bars 8, 8, the spacing between which is the same as the spacing between the holes 4 for vertical reinforcing bars. The length is equal to l. In this case, the length of the interval l is normally 75 cm, so two holes 8, 8 are drilled, but depending on the quality of the ground, the interval l can be shortened and the number of holes can be increased appropriately. Further, although the shape of the hole 8 is conical, it is not limited to the conical shape, and may have any suitable shape. Furthermore, grooves 9, 9 are usually provided at both ends of the block 7, and at the same time, drain holes 10 are provided diagonally.
The through hole formed by this and the drain hole 10 are used for water discharge after constructing the retaining wall. Incidentally, if a gap occurs between the upper surface of the foundation concrete 1 and the lower surface of the foundation concrete plate 5, it may be filled with mortar or the like.

As explained above, according to the present invention, it is not only possible to stack blocks easily, but also to allow blocks to be placed on the foundation concrete even if the top surface of the foundation concrete poured on site does not correspond to the slope of the retaining wall. Since the upper surface of the foundation concrete plates can be precisely aligned to the angle corresponding to the slope of the retaining wall, the blocks can be stacked starting from the lowest level at the most appropriate constant angle. Therefore, the blocks can be stacked at a constant angle to match the slope of the retaining wall without having to make large angle corrections while stacking the blocks step by step. Therefore, the retaining wall built up according to the present invention is strong and has no possibility of collapsing. Also, even if the top surface of the foundation concrete is not flush, the foundation concrete plate will make it flush, so the top surface of the foundation concrete can be rough, and the foundation concrete plate can be installed before the foundation concrete has sufficiently cured. Since the blocks can be stacked together, the work period can be sufficiently shortened.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a laminated state showing one embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a perspective view of a base plate. In the diagram, 1 is foundation concrete, 2 is horizontal reinforcement,
5 is a concrete plate for the foundation, 6 is a vertical reinforcing bar, 7 is a large block, 9 is a groove, and 10 is a drainage hole. 〓〓〓〓

Claims (1)

[Claims] 1. On the top surface of the foundation concrete where horizontal reinforcing bars are placed and vertical reinforcing bars are placed upright at intervals between the blocks' reinforcing bars, the foundation concrete plates are placed in parallel by passing the vertical reinforcing bars through the vertical reinforcing bars through the reinforcing holes in the foundation concrete plates. Install the vertical reinforcing bars into the reinforcing holes of the lifted blocks, using the vertical reinforcing bars mentioned above as guides, making sure that the top surface of each foundation concrete plate is flush with the top surface of the retaining wall and at an angle that corresponds to the slope of the retaining wall. The lowermost block is placed on the upper surface of the foundation concrete plate while the vertical reinforcing bars are inserted through the holes, and the upper blocks are stacked one after another on top of this block while passing the reinforcing bars through the vertical reinforcing bars. Retaining wall construction method.