JPS6282112A - Plane drain material - Google Patents

Abstract

PURPOSE:To prevent solid hard bodies with flexibility from being destroyed by an earth pressure, by interposing one or more kinds of the solid hard bodies between two water-permeable sheets adequately. CONSTITUTION:Solid hard bodies 2 having various forms are made of substance which is sufficiently resistant to an earth pressure; i.e. glass, ceramics, synthetic resin, or the like. Then, so far as sheets 3, 4 with the solid hard bodies 2 interposed between the sheets are concerned, either sheet has water-permeability certainly. The sheets 3, 4 are dotted discontinuously with one or more kinds of combined hard bodies 2 with sufficient flexibility. By this method, even if they are used for a long period the water-permeability is not lowered, and plane materials which are easily treated and laid can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flat drain material used in a drainage method in civil engineering work.

Traditionally, drain materials have been used to be buried in the soil of roads, cliffs, drainage canals, dams, etc. to absorb moisture in the soil and drain it to the outside. A perforated pipe made of synthetic resin or iron 1 Synthetic fiber non-woven fabric made into a tubular shape, especially for drain materials laid laterally in the soil, a lamination of a synthetic resin textured sheet and a synthetic fiber non-woven fabric There are structures in which a mesh, filament, nozzle, filament bundle, snozoiral spring, etc. are sandwiched between the body or synthetic fiber nonwoven fabric. All of these inserts are vertically aligned.

Such conventional drain materials have the following drawbacks.

(1) Over time, the structure will be crushed by earth pressure,
If the water does not flow properly, the drainage capacity will decrease.

G2) If the insert or laminate is made stronger to prevent crushing, the flexibility of the drain material will decrease, making it impossible to wind up a long length or making it difficult to lay on uneven laying surfaces. This results in disadvantages such as:

The present invention eliminates the drawbacks of conventional drain materials, and
To provide a flat drain material that is resistant to crushing by earth pressure, does not impair its flexibility, does not reduce water permeability even after long-term use, and is easy to handle and lay.

The feature of this invention is that seven or more types of three-dimensional hard bodies having various shapes are discontinuously scattered. Although it is a hard body, it is discontinuous, so
The entire structure has sufficient flexibility, making it possible to roll it up into long lengths and to lay it on uneven surfaces.

To explain the invention in more detail, Fig. 1 shows three-dimensional hard bodies having various shapes, and the materials used are glass, earthenware, synthetic resin, ceramic, etc.
It is assumed that the shape shown in FIG. 7 is suitable for the purpose, but it is not limited to this shape. The most preferable shape is (a
) to (d) are hollow spherical bodies having through holes from the surface. In this case, the counter pressure is strong and the hard body itself has a permeation channel, so it is suitable for the purpose of the present invention.

Furthermore, the sheet that holds the insert must be water-permeable.

The planar rune material according to the present invention is laid underground for drainage purposes such as roads, drainage channels, cliffs, and landfills, and is used for improving overly humid soft ground.

Next, the present invention will be explained in more detail with reference to Examples.

〔Example〕

Using two sheets of non-woven fabric with a basis weight of 5oy7 and made of polyester fibers with a thickness of 3 denier and a fiber length of lt/M, adhesive was applied in dots on the inner surface of each sheet, and the adhesive shown in Figure 1 (Fig. 1) was applied between the two sheets. The synthetic resin hard bodies having the shape of d) were spread to such an extent that they would not stack up on each other, rolled, and pressed between two rolls to adhere and fix, thereby creating a flat drain material.

When I measured the hydraulic conductivity of this material, it was 1O0crn/se.
At level C, the difference in water permeability due to changes in the pressure applied to the top and bottom surfaces was negligible.

The installation on uneven surfaces was also good, and when we investigated 3 months after the start of construction, we found no changes from before construction.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing three-dimensional hard bodies having various shapes used in the flat drain material of the present invention, and FIG. 2 is a perspective view of the flat drain material of the present invention in a partially broken state. . /...Through hole from the surface, C...Three-dimensional hard body, 3.
...Water permeable sheet material, ≠...Water permeable sheet or water impermeable sheet for autumn.

Claims (1)

[Claims] 1 of three-dimensional hard bodies having various shapes as shown in Figure 1.
By appropriately interposing the type or two or more types between two sheets, one of which has water permeability,
A flat drain material that is characterized by its ability to withstand earth pressure and flexibility.