JPS6335065Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water guide bag used to construct an underground water conduit.

One method for draining water from fields, gardens, or grounds is to bury long pipes underground with numerous water holes on the top, but this method not only tends to clog the water holes, but also However, such pipes had the disadvantage that it was difficult to bend them arbitrarily to suit the drainage route.

It is an object of the present invention to provide a water guide bag for an underdrain that eliminates such drawbacks, does not cause clogging, and can be easily installed.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in Figure 1a, a sheet 2 made of synthetic resin that does not have water permeability, such as vinyl, is pasted on half of the short side of a fine rectangular mesh 1 made of woven nylon thread. The bag body 3 is formed by folding back the net 1 at the center in the short side direction and sewing together the overlapping long sides and one end surface with cotton thread 4, as shown in b of the same figure. A small lump of coal husk 6 having a large number of continuous pores is filled into the bag body 3 through the opening 5 to form a roughly circular cross section with a length of about 1 m and a diameter of 20 to 30 cm, as shown in c of the same figure. Only the lower half of the water guide bag 7 has no water permeability. This water guide bag 7 has a water passage gap between the filled coal shells 6 themselves and the adjacent small lumps, so water flowing in from the mesh on the upper surface 8 of the water guide bag 7 flows down inside the coal shells 6 and between them. Then, it reaches the sheet 2 which is curved into a substantially semicircular shape.

Next, an example of an underdrain constructed using this water guide bag 7 will be described with reference to FIGS. 2 and 3.

Grooves 12 are formed in the valleys of the ground surface 10 formed on a gentle slope.
, and install the water guide bag 7 in this groove 12 with the side to which the sheet 2 is attached facing down and the opening 5 side facing upward of the slope of the groove 12, and then close the water guide bag 7. Opening 5 of the water guide bag 7 with the closed end installed first
and place it on top of the sheet 2.
By installing a large number of water guide bags 7 in the groove 12 while sequentially connecting them in this way, each water guide bag 7
After the sheets 2 form a continuous long drainage channel in the shape of a gutter, earth and sand 15 with a high sand content and good water permeability is placed on top of each water guide bag 7.

In this way, rainwater that flows on the ground surface 10 and collects in the valleys flows down from the upper surface 8 of the water guide bag 7 into the inside of the coal husk 6 and between adjacent small lumps, and reaches the sheet 2. The water flows down the slope on its upper surface and is drained.

FIG. 4 shows a water guide bag 7a which is a modification of the water guide bag 7, and the opening 5 of the water guide bag 7 is sewn closed. When constructing an underdrain using this water guide bag 7a, As shown in FIG. 5, the upper end of the slope of the previously installed water guide bag 7a is crushed flat, and the end of the next water guide bag 7a is placed on top of it. By installing a large number of water guide bags 7a in the groove 12 while sequentially connecting them in this way, the sheet 2 of each water guide bag 7a is formed into a long, continuous gutter-like sheet, similar to the case where the water guide bags 7 are used. A culvert is constructed.

The bag body 3 of this embodiment can be produced by applying liquid synthetic resin instead of attaching the water-impermeable sheet 2 to the net 1, or by combining the net 1 and the water-impermeable sheet 2 with the same width. By overlapping them and sewing their edges together, a water-impermeable lower surface may be formed.Furthermore, a cloth bag with excellent corrosion resistance may be used. In addition to the coal husk 6, various natural or artificial granules or lumps can be filled into the water guiding bags 7, 7a, but those having continuous pores inside are lighter and more transparent. It has the advantage of being highly water-based.

As specifically explained in the above embodiment,
The gist of the water guide bag for underdrains of the present invention is that only the lower surface has no water permeability, and the bag is filled with granular or lumpy materials to form a water flow gap inside. By stacking the bottom surfaces of the two ends of the bags and connecting them together, we created a continuous underdrain like a gutter, so there is no clogging like in the past, and there is no need to change the drainage slope or drainage route. It is possible to easily install the underdrain according to the requirements, and the work of installing the underdrain can be carried out quickly.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the manufacturing procedure of a water-conducting bag according to an embodiment of the present invention, Fig. 2 is a side sectional view of the water-conducting bag in a state where it is buried, Fig. 3 is a sectional view taken along the line A-A, and Fig. 4
The figure is a perspective view of a modified example of the water guide bag, and FIG. 5 is a sectional view of the water guide bag in a state where it is buried. 3...Bag body, 6...Coal husk (lump), 7, 7a
...Water conduction bag.

Claims (1)

[Scope of utility model registration request] 1. A water guide bag for an underdrain, characterized in that only the lower surface of the bag is impervious to water, and the bag is filled with granular or lumpy materials to form a water passage gap therein.