JPS6239167Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a seepage trench that allows rainwater flowing on the ground surface to infiltrate into the underground. In a permeation trench that is buried in the ground and has a permeation filter layer made of crushed stone or the like formed around the permeation pipe, a pine-shaped permeation plate is installed between the permeation filter layer and the surrounding permeation ground. The present invention relates to an infiltration trench characterized by having an intervening infiltration panel formed by integrally laminating infiltration sheets.

The applicant has proposed a permeable sheet with a frame, in which a permeable sheet is interposed alone between a permeable filter layer made of crushed stone and the permeable ground, or a permeable sheet is stretched over the inner surface of a frame having a predetermined shape. We have developed a permeation trench constructed by interposing the sheet, filed a patent application, and put it into practice.However, when the conventional permeation sheet is used alone or with a frame, the former has no rigidity at all. Therefore, handling is difficult and construction work is difficult, and the latter requires a separate frame and a permeable sheet stretched over this frame, and in both cases, almost the entire surface of the permeable sheet is exposed. Therefore, it had the disadvantage that it could be easily damaged by crushed stone and the like.

The trench according to the present invention is a technique developed in view of these conventional drawbacks, and is particularly concerned with improving the permeable sheet interposed between the permeable filter layer and the permeable ground.

One embodiment of the trench according to the present invention will be explained in detail with reference to the drawings. In FIG. 1, 1 is a permeable panel used in the trench according to the present invention;
A permeable sheet 3 made of synthetic fiber or the like is integrally laminated on one side of a permeable plate 2 made of non-woven mat or the like. The permeation panel 1 in the above embodiment can also be constructed by providing windows 4 by drilling holes in the permeation plate 2 in certain places in a predetermined shape, as shown in FIG.

In constructing the trench according to the present invention, as shown in FIGS. 3 and 4, a trench 6 is bored in permeable ground 5, and sheet piles 7 for earth retention are attached around it. Next, the infiltration panel 1 constructed as described above is laid over almost the entire surface of this excavation groove 6, and its ends are temporarily attached to the sheet pile 7, and then crushed stone is filled into this excavation groove 6 to allow infiltration. A filter layer 8 is formed, and a permeation tube 9 is provided approximately in the center of the filter layer 8.
Then, the sheet pile 7 is pulled out and removed, a part of the permeable panel 1 is covered on the upper surface of the permeable filter layer 8, and backfilling soil 10 is layered on top of this to completely fill the excavated groove 6. By burying it, the penetration trench according to the present invention can be completed.

As mentioned above, the permeation trench according to the present invention has a permeation panel constructed by integrally laminating a permeation plate and a permeation sheet between the permeation ground and the permeation filter layer. It can completely filter the substances contained in the water that permeates into the permeable ground, prevent clogging of the permeated ground, and prevent soil particles from flowing into the permeable filter layer. Because it is rigid and strong, it is convenient to handle, and it can be easily laid over the entire surface of the excavated trench, and its ends can be temporarily attached to sheet piles, etc., so it can be used as a conventional frame. There is no need for a body at all, and since the permeable sheet is always protected by the permeable plate, there is no risk of it being damaged by crushed stones, etc., and it can be used almost permanently. It is something that you have.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of the penetration panel, Figure 3
4 and 4 are cross-sectional views of the trench of the present application. 1 is a panel, 2 is a permeable plate, 3 is a permeable sheet, 4
is a window, 6 is a groove, 8 is a filter layer, and 9 is a permeation tube.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A permeation pipe or porous pipe with a large number of holes drilled at predetermined positions is buried in permeable ground, and a permeation filter layer made of crushed stone or the like is formed around the permeation pipe. In the permeation trench formed by the permeation trench, a permeation panel formed by integrally laminating a permeation sheet on a pine-shaped permeation plate is interposed between the permeation filter layer and the permeation ground around it. penetration trench. (2) The infiltration trench according to claim 1 of the utility model registration claim, characterized in that a window is bored at a predetermined position of the infiltration plate to expose the infiltration sheet.