JP2586819Y2 - Drainage material holder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder for holding a backfill drainage buried along a retaining wall such as an embankment or a tunnel in a fixed position.

[0002]

2. Description of the Related Art As shown in FIG. 5, a retaining wall W is constructed on an embankment G, and a drain hole H for discharging moisture in the embankment G is provided at a predetermined position of the retaining wall W. Planar drainage material A on the back
The construction method of burying is known. The drainage material A thus constructed has a function of guiding the water in the embankment G to the back surface of the retaining wall W and then discharging the water to the drain hole H.

[0003] A general drainage material A has a void inside which acts as a so-called "water path", and is surrounded by a water-permeable sheet such as cloth. However, conventionally, drainage material A
In some cases, the air gap may slip due to a load such as vibration, and in such a case, the gap may be narrowed or crushed, and smooth drainage may not be performed.

[0004] In addition, when a broken sheet is inserted from the drain hole H due to mischief of a child or the like and the water-permeable sheet is torn, earth and sand enters the internal gap from the broken portion of the water-permeable sheet, and the gap is removed. A situation such as blocking may occur. And when the internal void is closed in this way, the void impairs the function as a water path,
Smooth drainage will not be achieved.

[0005]

SUMMARY OF THE INVENTION The present invention has been made under the circumstances described above, and not only can the drainage material be surely positioned at a fixed position by using a drain hole formed in a retaining wall. Another object of the present invention is to provide a drainage retainer that can prevent a water-permeable sheet of a drainage material from being broken even when a stick or the like is inserted into a drain hole.

[0006]

According to the present invention, there is provided a drainage retainer having a perforated plate and an inner surface of a drainage hole formed in a retaining wall and protruding from the perforated plate through the hole. And a plurality of wires that are resiliently contacted and inserted and held in the drain holes.

[0007]

With this configuration, a perforated plate is arranged on the back of the drainage material, and a plurality of wires protruding from the perforated plate in a cylindrical shape are inserted and held in the drain holes of the retaining wall, and When the upper drainage material and the lower drainage material are locked by the wire, the drainage is positioned on the retaining wall via the wire. Also, since a gap is formed between the upper drainage material and the lower drainage material locked by a plurality of wires protruding from the perforated plate in a cylindrical shape, a rod is inserted through the drain hole. Even the stick does not hit the drainage material.

[0008]

1 shows a holder 1 according to an embodiment of the present invention. The holder 1 includes a plurality of wires 3 from the center of a perforated plate 2 made of a synthetic resin net having high bending rigidity.
Are arranged in a cylindrical shape and projected. The wires 3 are formed by bending a high tensile strength steel wire, such as a piano wire, which is hard to bend and has excellent elasticity, into a U-shape, and inserts the U-shaped bent portion 31 into the hole (mesh) 21 of the perforated plate 2. The wires 3 project from the perforated plate 2, and each wire 3 is bent inward slightly at a point a near the tip thereof.

FIG. 2 is a cross-sectional view showing a state in which the drainage material 20 backed using the holder 1 of the present invention is held on the retaining wall W. In FIG. 2, a plurality of wires 3 of the holder 1 are bundled against the elasticity of themselves and inserted into the drainage hole H, and elastically contact the inner surface of the drainage hole H by their own elastic restoring force. A planar drainage material 20 is provided between the retaining wall W and the perforated plate 2.
Are arranged such that the lower end surface thereof is engaged with the wire 3 and the upper end surface thereof abuts on the wire 3..., The perforated plate 2 and the wire 3.
, The drainage material 20 is held on the back surface of the retaining wall W.

With this configuration, the drainage members 20 stacked at the wire members 3 at intervals are separated from the wire members 3.
Each drainage material 20 is placed on the
… There is no worry about falling off. In addition, even if the rods inserted from the drain holes H penetrate the retaining wall W, the rods reach the gap between the lower end surface of the upper drainage member 20 and the upper end surface of the lower drainage member 20. Therefore, there is no concern that the water-permeable sheet of the drainage material 20, 20 will be broken by the broken rod. Therefore, the internal gap of the drainage material 20 is narrowed or blocked by slippage, or the permeation sheet of the drainage material 20, 20 is broken due to mischief or the like, and the soil and the like block the gap, so that smooth drainage is performed. There is no such thing as being damaged. For this reason, the water in the embankment G that has penetrated into the upper drainage material 20 flows smoothly through the gap inside the drainage material 20 as “water path”,
Part of the water flows out to the slope through the drain hole H, and the remaining water enters the lower drainage material 20.

As shown in FIG. 2, if the distal ends of the wires 3 are converged in an intersecting shape when the wires 3 are inserted into the drain holes H, the water is drained by the convergence of the wires 3. Since the hole H is closed, when a rod piece is inserted from the drain hole H, the rod piece hits the converging portion b of the wire rod 3 and cannot be further inserted. Therefore,
It is possible to more reliably prevent the water-permeable sheet of the drainage materials 20 and 20 from being broken by the stick being cut.

FIG. 4 shows an example of a planar drainage material 20. This is manufactured by pressure molding high density polyethylene resin,
A large number of projections 21 in a lattice arrangement projecting from both sides thereof are provided, and a gap between the projections 21 serves as a "water path". A high-density polyethylene resin plate having a large number of projections 21 is surrounded by a water-permeable sheet 22 made of a nonwoven fabric made of polypropylene resin.
The holder 1 shown in FIG. 3 can be suitably used for such a drainage member 20, that is, the drainage member 20 having the protrusions 21 on the main body of the drainage member 20.

The holder 1 shown in FIG. 3 connects a pair of frame plates 4 and 5 to each other via a connecting portion 6 so as to face each other.
Are provided integrally with a perforated plate 2 at the center thereof, and a plurality of wires 3 are projected from the perforated plate 2 in a cylindrical arrangement. In this holder 1, a pair of frame plates 4, 5
Is a distance corresponding to the thickness of the planar drainage member 20 described with reference to FIG. 4, that is, a distance substantially equal to the thickness dimension of the drainage member 20. The frame plate 4 on one side is provided with tall main projections 12 and 12 and inwardly protruding auxiliary projections 13 and 13 protruding inward. When the planar drainage members 20, 20 described with reference to FIG. 4 are inserted between the pair of frame plates 4, 5 of the holder 1 from above and below, the lower end surface of the upper drainage member 20 is the upper main drainage member. While being locked to the projection 12,
The auxiliary projection 13 fits into the recess between the projections 21 and 21 to ensure reliable positioning. The same applies to the lower drainage member 20, and the lower drainage member 20 is reliably positioned in a suspended state. Figure 1 for other items
Is the same as that described in FIG.

[0014]

According to the present invention, the drainage material is reliably positioned on the retaining wall, and the drainage material after construction is less likely to slip off, so that drainage can be performed smoothly for a long time. Further, since there is no fear that the water-permeable sheet of the drainage material is broken due to children's mischief or the like, a situation in which the “water path” of the drainage material is blocked by earth and sand does not occur.

[Brief description of the drawings]

FIG. 1 is a perspective view of a holder according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing a use state of the holder of FIG. 1;

FIG. 3 is a sectional view of a main part showing a use state of a holder according to another embodiment of the present invention.

FIG. 4 is a partial schematic perspective view illustrating a drainage material.

FIG. 5 is a cross-sectional view for explaining a general usage mode of a drainage material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holder 2 Perforated plate 3 Wire rod H Drainage hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A perforated plate, and a plurality of perforated plates protruding in a cylindrical shape from the perforated plate through the holes, elastically contacting an inner surface of a drain hole formed in a retaining wall, and being inserted and held in the drain hole. A retainer for a drainage material, comprising: a wire;