JPH0132331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for blocking underground water that permeates from rivers, lakes, etc. through embankments, ridges, etc. into the underground of cultivated fields, grounds, parks, etc.

Until now, as shown in Figure 3, cultivated land below rivers, lakes, rice paddies, etc., fields and parks below cliffs, etc. have been contaminated with water that seeps into the ground from rivers, lakes, and rice fields above, and underground seeps from cliffs. This resulted in excessive moisture, causing problems such as over-wetting damage to crops and making grounds and parks unusable.

Therefore, as shown in Figure 4, a clear culvert D was constructed around the cultivated land and along the bottom of the cliff to facilitate drainage.

However, for cultivated land, clear ditches lead to a decrease in the yield rate due to a reduction in the cultivated area, and in grounds and parks, they can become an obstacle when exercising or cause problems such as children and others accidentally falling into them. It was hot.

The present invention was made in view of the above circumstances, and
The purpose of this is to drain water that has permeated through embankments, banks, etc. while preventing it from seeping into the ground of cultivated fields, grounds, parks, etc., and to backfill the excavated drainage ditches to reduce the cultivated area. The object of the present invention is to provide a safe underground water seepage blocking device that does not impede exercise.

The basic configuration to achieve the above objectives is:
A drainage pipe is installed at the bottom of the drainage ditch excavated at the bottom of the slope of the earth embankment structure, and the drainage pipe is covered with a water-permeable coating that extends over the entire side wall of the drainage ditch on the earth embankment structure side. A water-permeable layer is laid down, the water-permeable layer is covered with a water-blocking membrane, and the drainage ditch is backfilled.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described with reference to the drawings in the case of cultivated land.

The underground seepage water blocking device A is a drain pipe 2 installed at the bottom of a drainage ditch 1 excavated at the bottom of the cultivated land B side slope c ₁ of the earthwork structure C such as an embankment or levee to drain underground seepage water. Then, the drain pipe is covered with a water-permeable covering 3, and the side walls 1a of the earthwork structure C of the drain ditch 1 are covered.
A water-permeable layer 4 is laid over the entire surface of the water-permeable layer, the surface of the water-permeable layer is covered with a water-blocking film 5, and the drainage ditch 1 is backfilled with excavated soil.

A drainage ditch 1 is excavated along the earth embankment structure C at the _bottom of the slope c1 on the cultivated land B side of the earth embankment structure C.

The side walls 1a of the earth embankment structure C of the drainage ditch 1 are excavated at a steep slope that intersects the slope c ₁ of the earth embankment structure C, and the side walls _1a of the earth embankment structure C and the side walls of the drainage ditch 1 are A drain pipe 2 is arranged at the bottom of the drain ditch 1 so that the intersection with 1a is at a higher position than the ground level of the cultivated land B.

The drain pipe 2 is made of metal or synthetic resin with excellent corrosion resistance and shape retention, has a substantially semicircular cross section over its entire length, and is disposed over the entire length of the bottom of the drain 1 with the open side facing upward. Then, the upper part is covered with a water-permeable covering 3 to improve drainage performance so that excavated soil thrown in during backfilling does not come into direct contact with it.

The drain pipe 2 is not limited to the semicircular shape described above, but may be a steel pipe or a perforated pipe with small holes perforated along the entire circumference or the entire length of the upper side.

The covering 3 is made of open-cell soft foamed synthetic resin or similar foamed rubber that has the water permeability of straw or textile products, and is designed to prevent the excavated soil thrown in during backfilling from coming into direct contact with the drain pipe 1. To prevent clogging of a pipe 1 and to effectively drain seepage water seeping from the ground surface after backfilling through a drain pipe 1.

The permeable layer 4 is made of the same water-permeable material as the covering 3, and is laid over the entire surface of the side walls 1a of the earthwork structure C of the drain 1, and is laid so that the lower end is in contact with the drain pipe 1. , its surface is covered with a water-shielding film 5.

In addition, the upper end of the permeable layer 4 is the side wall 1a of the earth embankment structure C.
Cover it in such a way that it extends from the top end to the slope _c1 side.

Further, the permeable layer 4 is laid gradually thicker from the upper end to the lower end, with the upper end acting as a water inlet to facilitate the entry of permeated water, and the lower end making it easier to introduce the permeated water into the drain pipe 2.

Therefore, the covering 3 covers the lower end of the permeable layer 4 on the drain pipe 1 and on the side walls 1a of the earthwork structure C of the drain pipe 1.
If it is brought into branch contact with the water permeable layer 4, it can serve as the water permeable layer 4.

The water-shielding film 5 is made of a board or sheet made of soft synthetic resin or rubber that has excellent corrosion resistance and weather resistance, and its upper end extends above the water-permeable layer 4 to cover the slope of the earth embankment structure C. c ₁ Fix to the lower surface with the fixing device 4a, and the lower end covers the upper surface of the C side half of the earthwork structure 3, leaving the cultivated land B side half as an uncovered part, and excavate after backfilling. Seepage water that permeates from the soil is introduced into the drain pipe 1 through the covering 3.

If the construction is carried out as described above, the water-shielding membrane 5 will prevent underground seepage water that has permeated into the earthwork structure C from rivers, lakes, etc. and seeped into the slope c ₁ from penetrating into the cultivated land B. The permeated water can be reliably guided to the drain pipe 1 through the permeable layer 4, thereby enhancing the water-blocking effect and drainage effect.

As described above, the present invention provides a drainage pipe at the bottom of a drainage ditch excavated at the bottom of the slope of an earth embankment structure, covers the drainage pipe with a water-permeable coating, and removes the soil in the drainage ditch. A permeable layer is laid across the entire side wall of the embankment structure, and the permeable layer is covered with an impermeable membrane, and drainage ditches are backfilled. This prevents underground water seeping into the earthwork structure from rivers, lakes, etc. While blocking water from seeping into the ground of cultivated land, grounds, parks, etc. with a water-blocking membrane,
The underground seepage water that has seeped onto the slope of the earth embankment structure can be guided to the drain pipe through the permeable layer, and the above-mentioned blocking effect and drainage effect on the underground seeping water can be enhanced. Since the drainage ditches were backfilled with excavated soil, it was possible to secure a sufficient cultivated area and improve the yield rate, and it was possible to secure the same wide area in fields and parks as before construction. At the same time, it is possible to provide a safe and useful underground water seepage blocking device that does not impede exercise.

Thus, the intended purpose can be achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a sectional view of an underground seepage water blocking device, Fig. 2 is an enlarged cross-sectional perspective view of the underground seeping water blocking device, and Fig. 3 is a farmland located at a location lower than a river. Figure 4 is a cross-sectional view of the land with a clear ditch installed in cultivated land located at a lower level than the river. In addition, in the figure, A...Underground seepage blocking device, 1...Drainage ditch, 2...Drain pipe, 3...Coating, 4...Permeable layer, 5...Waterproof membrane, C...Earth embankment structure , respectively.

Claims (1)

[Claims] 1. A drainage pipe is installed at the bottom of the drainage ditch excavated at the bottom of the slope of the earthwork structure, and the drainage pipe is covered with a water-permeable coating, and the entire side wall of the drainage ditch on the earthwork structure side, etc. A device for blocking underground water seepage from rivers, lakes, etc., by laying a permeable layer over the area, covering the permeable layer with an impermeable membrane, and backfilling drainage ditches.