JPH03180611A - Underground drainage material - Google Patents

Abstract

PURPOSE:To improve the productivity and drainage efficiency of a drainage material by composing the drainage material to be used for stabilizing the ground of a created land or the like of water permeable sheets integrally laminated on the side surfaces of a mesh fabric where throughholes are continuously disposed in parallel. CONSTITUTION:Synthetic nonwoven fabrics 3, 4 having water permeability are integrally laminated on the side surfaces of a mesh fabric 1 consisting of synthetic resin fibers where throughholes 2 are disposed in parallel continuously, so a sheet of draining material having a good flexibility is formed. This drainage material is embedded in the ground of a created land or a road or around the ground surface to drain excessive water of underground water, rainwater, etc., from the throughholes 2. A drainage material capable of mass production at a low cost having a good drainage efficiency can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to underground drainage which is installed in the ground of developed land, roads, etc. and is capable of collecting water in the soil and smoothly discharging it.

<Conventional technology> Traditionally, in order to stabilize the ground by draining surplus water such as groundwater, spring water, rainwater, etc., tubular, FIP-shaped, or sheet-shaped drainage materials have been buried in the soil or placed near the surface. It has been used to stabilize the ground by laying soil layers through drainage, promoting drying and compaction.

As the above-mentioned cylindrical drainage material, an unglazed pipe or a concrete pipe with small holes is used, and as the above-mentioned cylindrical or sheet-like underground drainage material, two liquid-permeable sheets such as nonwoven fabric or felt are used. During this period, drain pipes with buried drainage pipes were commonly used.

More recently, for example, as shown in Japanese Utility Model Publication No. 63-6253, there has been developed a collection and drainage heavy pipe in which a mesh pipe is constructed of thick synthetic resin yarns woven as warp and weft threads, and Japanese Utility Model Publication No. 63-46806. As shown in the official gazette, an underground drainage structure material in which a core sheet with protrusions and recesses on both sides and a drainage pipe with holes around it are inserted inside two nonwoven fabric covers, or As shown in Publication No. 22183, a mesh band with a large number of water passage holes is spirally wound in a wave shape, and adjacent strips are joined to each other to form a bellows-like structure as a whole. Bellows-shaped underdrain materials have been developed.

<Problems to be Solved by the Invention> However, the underground drainage material shown in the above-mentioned prior art has a complicated overall structure, so it is difficult to mass-produce it continuously, and therefore there are problems such as extremely high cost. there were.

Furthermore, since the underground drainage material shown in the above-mentioned conventional technology has poor flexibility as a whole, partial destruction may occur in the drainage material due to sudden changes in the ground, when the drainage material is buried, or when used for a long period of time. There were other problems.

Especially in the case of the above-mentioned belt-shaped or sheet-shaped drainage material, it is difficult to install a large number of drainage pipes continuously within the drainage material, so if it is used for a long period of time, the drainage pipes or the surrounding sheet material may become damaged. There were problems such as clogging, which impeded the drainage function.

The underground drainage material according to the present invention relates to a completely new technology developed in view of these conventional problems.

<Means for solving yAB> The underground drainage material according to the present invention is a technology that fundamentally improves the problems of the above-mentioned conventional technology, and its gist is that through-holes are continuously arranged in parallel inside the fabric. It is characterized in that a liquid-permeable sheet is integrally laminated on the side surface of a hollow reticulated fabric.

<Function> As mentioned above, the underground drainage material according to the present invention has a liquid-permeable sheet such as a nonwoven fabric integrally laminated on the side surface of the hollow net-like fabric, so the entire structure is extremely flexible and can be easily used in developed areas, etc. It can be laid as is and adapted to uneven surfaces, and can withstand sudden changes in the ground and long-term use.

Furthermore, by laminating the hollow reticulated fabric and the liquid-permeable sheet, water in the surrounding soil can be collected extremely efficiently over the entire surface of the fabric.

Furthermore, since a large number of through-holes are continuously arranged inside the hollow reticulated fabric, the water collected inside the fabric is absorbed by the liquid-permeable sheet and the entire side surface of the hollow reticulated fabric through these numerous through-holes. It can be smoothly discharged to the outside through.

<Example> Hereinafter, an example of the underground drainage material according to the present invention will be specifically described with reference to the drawings.

FIG. 1 is a perspective explanatory view showing an example of the underground drainage material according to the present invention, FIG. 2 is a perspective explanatory view showing some of its constituent parts, and FIG. 3 is a sectional view of the underground drainage material shown in FIG. 1. FIG. 4 is a perspective explanatory view of the underground drainage 4A on the other side, and Question 5 is a cross-sectional explanatory view showing an example of construction of the underground drainage material of the present invention.

In No. 21A, 1 is a hollow reticulated fabric, comprising synthetic resin fibers with low heat shrinkability and synthetic resin 1 with high heat shrinkability.
6 and fibers are woven vertically and horizontally as warp and weft yarns.
Heat treatment is performed for about 10 minutes to 3 hours. It was made by This hollow reticulated fabric l is produced by heat-treating the fabric having the above-mentioned structure, thereby greatly shrinking the synthetic resin fibers with high heat shrinkability, thereby bending the resin fibers with low heat shrinkability into a loop wave shape. hand,
Hollow through-holes 2 made of synthetic resin fibers are formed in series and in parallel in the interior of the fabric.

Next, in FIGS. 1 and 3, 3.4 is a synthetic nonwoven fabric with high liquid permeability, and Qn<t* described in ft1l.
It is integrally laminated and adhered to both sides of the 1fi hollow reticulated fabric l.

Therefore, liquid such as water that has permeated through the entire surface of the synthetic non-woven fabric 3.4 is collected in the large number of straight holes 2 inside the L-edge on the side surface of the hollow reticulated fabric which is in contact with the synthetic non-woven fabric 3.4. The liquid can be discharged to the outside through the through hole 2.

In the above embodiment, the synthetic nonwoven fabric 3.4 was used as an example of a liquid permeable sheet, but it is not limited to this.The liquid permeable sheet can be any sheet that can permeate liquid, such as felt material. .

Various materials such as natural or synthetic resin fabric material 1 asbestos material can be used.

Furthermore, in the above embodiment, the synthetic nonwoven fabrics 3 and 4 were laminated and bonded on both sides of the hollow reticulated fabric 1, but as shown in FIG. It is also possible to laminate and adhere the synthetic nonwoven fabric 4 to only one side.

An example of construction of an underground water drain according to the present invention configured as described above will be explained with reference to FIG.

FIG. 5 shows the construction of underground υF water material Ij! according to the present invention. ! 5
81 on the territorial slope! ! This shows an example of a 'r-.

The above underground UT water material has a liquid permeable note on one side. ! It is laid so as to be in contact with the slope of section 1 of Section 5, and the spring water that comes out of the essential area 5 is collected in the N through hole 2 while passing through the liquid permeable sort, and is allowed to flow down from the different through hole JL2. Furthermore, it has been constructed in such a way that wastewater can be treated with a 1-run 6 installed below it.

A covering soil layer or a grass layer (not shown) can be layered on top of the underground drainage material constructed as described above to completely bury it.

<Effects of the Invention> Since the underground drainage material according to the present invention has a liquid-permeable sheet integrally laminated on the side surface of a hollow reticulated fabric, the overall structure is extremely simple and can be mass-produced at low cost.

In addition, since it has the above-mentioned structure, it is highly flexible and can be used on reclaimed land.
It can be easily installed on uneven surfaces such as roads, and can be used for long-term use and sudden changes in the ground.
= Can collect water well.

Furthermore, since a large number of through holes are continuously arranged inside the hollow reticulated fabric, the liquid that has passed through from both sides is very smoothly collected into the through holes and discharged. I have one more thing to do.

Therefore, this makes it possible to prevent the clogging phenomenon that occurs in the prior art.

Moreover, since the through holes provided inside the hollow reticulated fabric described above are formed within the fabric combined with synthetic resin fibers, it has elasticity, is strong in terms of strength, and has a strong restoring force.
If the drainage material is buried underground, or if a large weight is added to the buried ground surface, or if it is laid for a long period of time,
Enough of these, even if the amount is added for a long time! It has the characteristic of being able to withstand even a single amount.

[Brief explanation of drawings]

FIG. 1 is a perspective explanatory diagram showing an example of the underground drainage material according to the present invention, FIG. 2 is a perspective explanatory diagram showing a part of the T** component,
Fig. 3 is a cross-sectional view of the underground drainage material shown in Fig. 1, Fig. 4 is a perspective explanatory view of the underground drainage material on the other side, and Fig. 5 is a cross-sectional explanatory view showing an example of construction of the underground drainage material of the present invention. be. 1 is hollow reticulated fabric, 2 is 11 holes, 3゜4 is non-woven fabric at the base, 5 is compound fabric, and 6) is leno.

Claims (1)

[Claims] An underground drainage material characterized by being constructed by integrally laminating a liquid-permeable sheet on the side surface of a hollow net-like fabric in which through-holes are continuously arranged in parallel inside the fabric.