JPH0453217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a synthetic resin foam block for construction, and more particularly to a foam block suitable for draining underground soil.

(Prior Art) A method of constructing a road embankment by stacking synthetic resin foam blocks on soft ground is currently being attempted.

According to this construction method, the lightweight nature of the foam blocks prevents ground subsidence due to vertical earth pressure, and enables quick construction.

In addition, on land with level differences, foam blocks are piled up in an inverted triangle shape on the land below the boundary to reduce horizontal earth pressure and make the slope of the retaining wall closer to vertical, thereby increasing the use of listed land. The present inventors have also proposed a method with improved performance.

(Problems to be Solved by the Invention) In the above-mentioned foam block embankment, since the foam blocks are impermeable to water, treatment of wastewater from the ground poses a problem.

That is, rainwater absorbed near the end faces of the earth where earth pressure is applied seeps out from the end faces of the earth. However, since foam blocks are water-impermeable, they prevent this seepage. As a result, drainage from the ground becomes insufficient.

An object of the present invention is to provide a foam block suitable for draining water from a ground in a construction such as an embankment using a foam block.

(Means for Solving the Problems) A feature of the present invention is that a groove for installing a pipe is provided on the surface of a synthetic resin foam block for construction.

(Example) An example of the present invention will be described below based on the drawings. In this example, earth retaining is exemplified as a foam block construction, but the foam block construction is not limited to this.

Referring to Fig. 2, the earth pressure acting end face 1 is embanked with a large slope as a whole, and between this earth pressure acting end face 1 and the wall body 2, synthetic resin foam blocks 3 are placed horizontally toward the top. They are arranged so that they are long, that is, stacked in an inverted triangular shape. Wall 2 is
It is made up of stacked concrete blocks 4, and backfill concrete 5 is placed between the wall 2 and the foam blocks 3.

Here, the foamed block 3 is a block molded product of synthetic resin such as foamed polystyrene, foamed polyethylene, foamed urethane, etc., and foamed polyethylene (foamed polystyrene) is particularly desirable because it is inexpensive.

In the earth retaining structure constructed in this way, the slope of the earth pressure acting end face 1 is sufficiently taken, the ground 6 itself is stable, and the foam block 3 is extremely lightweight, so that the horizontal soil applied to the wall 2 is The pressure will be very small. Therefore, the concrete block 4 may be thin and requires less construction labor. At the same time, it is possible to secure a wide range of listed land7.

The concrete blocks 4 constituting the wall 2 will be explained based on FIG. 3.

The concrete block 4 is composed of a front wall 8 made of a rectangular concrete slab with a required slope, and a lower plate 12 made of an iron plate fixed to two left and right places of the bottom part 9 by bolts 10 and nuts 11.

A fitting groove 14 is formed in the upper part 13 of the front wall 8, and when the concrete blocks 4 are stacked, the bolts 10 in the bottom part 9 of the upper concrete block 4 are inserted.
and a nut 11 are fitted and positioned. A cutout-shaped reinforcing bar guide 16 is formed on the inside of both bottom plates 12, through which reinforcing bars 15 are passed and fixed when concrete blocks 4 are stacked.

Further, in the center of the bottom 9 of the main body 8, a pipe notch 18 is formed in which an opening for a drainage pipe 17 is installed. The pipe 17 is installed in a pipe installation groove 19 formed on the surface of the foam block 3, and is used to discharge drainage from the ground 6 behind the wall 2 to the outside of the wall 2. This pipe installation groove 19 will be explained in detail later.

The earth retaining mentioned above will be constructed as follows.

First, the first concrete block 4A is installed, and the foam block 3 is installed at a distance from it. Next, earth is embanked behind the foam block 3, reinforcing bars 15 are erected and fixed to the reinforcing bar guide 16 of the bottom plate 12 of the concrete block 4A, and backfilling concrete 5 is placed between the concrete 4A and the foam block 3.

Through the bottom plate 12 of the concrete block 4,
Backfill concrete 5, concrete block 4
and the integrity of the foam block 3 is maintained. This process is repeated on the second stage concrete block 4B and the third stage concrete block 4B.
Concrete block 4C on stage... repeat in sequence.

When stacking the upper concrete blocks 4, the ends of the bottom plate 12 are placed on the foam blocks 3, so that the concrete blocks 4 can be installed stably and workability is improved.

For listing the foam block 3, a concrete slab 20 with reinforcing bars is laid. This concrete version 2
0 maintains and stabilizes the integrity of the stacked foam blocks 3.

Stability can be improved by tightening the foam blocks 3 to each other using a fastening tool (not shown) having claws that bite into the foam blocks 3.

Referring to FIG. 1, a pipe installation groove 19 for installing a drainage pipe 17 is formed on the surface of a particular foam block 3.

In this embodiment, the pipe installation groove 19 is integrally molded at the factory when the foam block 3 is molded. The foam block 3 is formed by foaming pre-foamed synthetic resin beads again in a mold (not shown) using steam, or by extrusion. In any case, a protrusion for forming the pipe installation groove 19 is provided on the mold, and the foam block 3 is
A pipe installation groove 19 is formed in one place. According to this, since the pipe installation groove 19 is formed at the factory stage, the quality is good and there are advantages in that the labor for on-site processing can be saved. However, grooving may be performed after forming the foam block 3.

The pipe installation groove 19 in this embodiment is formed by the foam block 3.
It is formed in the longitudinal direction at a position of 1/4 in the width direction on the upper surface 21 of. This is because, as shown in FIG. 4, the end faces 22 are shifted by 1/2 and stacked, and the upper foam block 3 is turned over so that the pipe installation grooves 19 of the upper and lower foam blocks match each other.

It goes without saying that the present invention is not limited to the above embodiments. For example, foam block 3
The position where the pipe installation groove 19 is formed is not limited to the upper surface, but may be any surface of the foam block 3.

(Effect of the invention) Rainwater absorbed near the end face of the earth where earth pressure acts is
It seeps out from the edge of the ground. However, since foam blocks are water-impermeable, they prevent this seepage. For this reason, there is a risk that drainage of the ground may be insufficient.

However, according to the present invention, since a pipe installation groove is provided on the surface of the foam block, it is possible to insert a pipe into the ground and drain water to the outside of the foam block, which solves the drainage problem of foam block structures. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the present invention.
FIG. 2 is a cross-sectional view of the construct according to the embodiment of FIG. 3A is a perspective view showing a part of the main part of FIG. 2, and FIG. 3B is a sectional view. FIG. 4 is a front view showing the embodiment of FIG. 1 in a stacked state. 3: Foam block, 17: Pipe, 19: Pipe installation groove.

Claims (1)

[Claims] 1 Foam blocks are piled up on soft ground to create an embankment, or foam blocks are piled up on land below the boundary of land with a step to create an embankment, in a foam block structure that reduces earth pressure in the vertical or horizontal direction. 1. A synthetic resin foam block with grooves for pipe installation, characterized in that a pipe installation groove is provided on the surface of the synthetic resin foam block for construction.