JPH07197509A - Rain water storing/permeation construction - Google Patents

Abstract

PURPOSE:To process the rain water in a wide region such as in a public housing development, in that region. CONSTITUTION:A recessed shaped excavation part 2 is formed in a public square type zone, and in the excavation part, a necessary quantity of box-shaped culverts 1 which permit the permeation flow-out of rain water from both the side surfaces are connected in the longitudinal direction, and rain water storing groove is formed in one row. The box-shaped culverts 1 group thus connected are arranged in plural rows in parallel in the lateral direction, and each part between the box-shaped culverts 1 in a parallel arranged state is filled with the crushed stones, gravels 3, etc., and the recessed-shaped excavation part 2 is refilled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the storage of rainwater for treating rainwater in a wide area such as a housing complex in the area. It relates to the infiltration method.

[0002]

2. Description of the Related Art When a housing complex or the like is constructed based on land development, the surface of the ground is covered with concrete and rainwater infiltration from the surface is significantly impeded. Therefore, the treatment of rainwater has to rely on sewage facilities, but when a large amount of rain falls, it exceeds the drainage capacity of the sewage and rainwater overflows on the surface, which is likely to cause serious damage. .

There is a regulating pond as one of the conventional means adopted to avoid the occurrence of the above situation. This is to prevent flooding of the sewer by establishing a large pond in the area and temporarily storing rainwater during heavy rain.

However, if the above means is used, there is a risk that a child may enter the regulating pond facility and cause an accident. Therefore, in order to eliminate such a risk, a means for installing a reservoir in the basement is adopted.

[0005]

The above-mentioned regulating basin and retaining basin both temporarily store rainwater during heavy rain, and the stored water is gradually drained to the sewage after the rain has subsided. Therefore, it is far from being a rational rainwater treatment method to construct a regulating pond and a retention basin that require a vast area and a large construction cost just to store rainwater. .

The present invention stores rainwater during heavy rain and at the same time allows the rainwater to actively permeate into the ground even under the water storage condition, thereby making it possible to construct the land and construction required for the facility. A new rainwater storage system that solves the above-mentioned problems by significantly reducing costs. It provides the infiltration method.

Another object of the present invention is to allow the stored rainwater to penetrate into the ground very favorably and stably.

[0008]

According to the present invention, a recessed excavation portion 2 having a required size is provided in a public plaza-shaped zone, and a permeate outflow of rainwater from both sides is provided in the excavated portion 2. A required number of box-type boxes constructed in such a manner as to enable them to be connected in the vertical direction to form a row of rainwater storage grooves, and one group of box-type boxes that are connected in this way is arranged in the horizontal direction. Multiple boxes are arranged in parallel, and then the box box 1 in the parallel state
Rainwater storage characterized by filling crushed stones, gravel, etc. 3 between each of the above, to backfill the inside of the concave excavation part 2 with crushed stones, gravel, etc. 3. It relates to the infiltration method.

The present invention is based on the adoption of such a construction method.
It aims to significantly reduce the land and construction costs required for the construction of facilities for storing rainwater, and at the same time to make the penetration of rainwater into the ground extremely good.

[0010]

The rainwater taken in each group of box-shaped boxes formed by arranging a group of box-shaped boxes which are connected so as to form a row of rainwater storage grooves in parallel in the lateral direction is From its side surface, it penetrates into the surrounding crushed stones, gravel, etc. 3, and rainwater is stored both inside the box-shaped box 1 and in the voids of the crushed stones, gravel, etc. 3 around it.

The stored rainwater is permeated into the ground from the bottom surface and four circumferential surfaces of the concave excavation portion 2, but not directly from the box box 1 but by crushed stones, gravel or the like 3. It will be performed through the backfill layer.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, A is a residential zone and B is a parking lot zone, and the present invention is provided in a public plaza-like zone such as parking lot zone B. Therefore, as a place for carrying out the present invention, a park, a stadium, a game plaza, etc. can be cited in addition to the parking lot.

1 to 3, reference numeral 1 denotes a box-shaped box, and the box-shaped box 1 is, as shown in FIG. 3, a perforated plate 1a in which rainwater permeation holes P are formed on both sides. is there. The perforated plate 1a is for allowing rainwater to freely flow inside and outside the box-shaped box 1.

Then, as shown in FIGS. 1 and 2, for example, a concave excavation portion 2 is provided at a planned parking lot construction site, and
In the excavation part, a required number of the above-mentioned box-type boxes 1 are vertically connected to form a row of rainwater storage grooves, and the group of box-type boxes 1 connected in this manner is laterally arranged in a plurality of rows. Arrange in parallel.

After that, by crushing stones, gravel, etc. 3 between each of the box-shaped boxes 1 in the parallel state, the recessed excavation portion 2 is backfilled with crushed stones, gravel, etc. Further, the upper surface portion of the concave excavation portion 2 is subjected to an appropriate exterior treatment 4 for the base of a construction object (a parking lot in the embodiment shown in FIG. 1) provided thereon.

By the way, as described above, one end of the box-shaped box 1 connected to the row of rainwater storage grooves is connected to a rainwater inflow groove or manhole formed at the edge of a road shoulder or a parking lot. . The other end is, in principle, a closed end, but it may be connected to a main sewer pipe or the like.

At the time of heavy rain, rainwater flows from the rainwater inflow groove or manhole into the box-shaped box 1 connected to the row of rainwater storage grooves. The rainwater that has flowed in is stored in the box-shaped box 1, but at the same time, it is discharged from the perforated plate 1a having the rainwater permeation hole P formed therein and enters the voids of crushed stone, gravel, etc. provided around the perforated plate 1a. It is stored. In other words, the rainwater stores the rainwater by forming a storage tank integrally with the inside of the box-shaped box 1 and the voids of the crushed stone, gravel, etc. around the box.

The rainwater stored in the recessed excavation portion 2 as described above penetrates into the ground from the bottom surface and four circumferential surfaces of the recessed excavation portion 2. Therefore, with the passage of time, the storage of water in the box-shaped box 1 and the voids such as crushed stone and gravel
It will naturally penetrate into the ground.

In the embodiment shown in FIG. 4, a vertical slit S for rainwater penetration is provided in the side wall portion of the box box 10 in place of the hole p for rainwater penetration, and the vertical slit S is provided in the vertical slit S. Therefore, rainwater can freely flow inside and outside the box-shaped box 1. In other words, any means other than such holes or vertical slits may be used, such as horizontal slits, round holes, square holes, vertically long holes, horizontally long holes, etc., as long as rainwater can flow.

[0020]

INDUSTRIAL APPLICABILITY According to the present invention, a public excavation zone is provided with a concave excavation portion 2 having a required area, and rainwater can be permeated out from both sides into the excavation portion. The required number of box-shaped boxes 1 are connected in the vertical direction to form a row of rainwater storage grooves, and the group of box-shaped boxes 1 connected in this way is arranged in parallel in a plurality of rows in the horizontal direction. In a row, and after that, between the box-shaped boxes 1 in the parallel state,
The concave excavation part 2 is formed by filling 3 with crushed stone, gravel, etc.
Since the interior was backfilled with crushed stone, gravel, etc., the land and construction costs required for the construction of facilities for rainwater storage will be significantly reduced.

That is, although the conventional method of simply storing rainwater requires a remarkably large storage area, the present invention stores rainwater and at the same time allows it to penetrate into the ground. Even if it is significantly smaller than that of the above, the water storage purpose will be sufficiently achieved. Further, according to the present invention, the inside of the box-type box 1 itself and the space around the crushed stone, gravel, etc. 3 are integrally formed to form a storage tank for storing rainwater. Compared to the case where the entire water storage part is constructed of concrete, etc., the workability and the construction cost can be significantly reduced.

Further, according to the present invention, the stored rainwater is
Although it penetrates into the ground from the bottom surface and four circumferential surfaces of the recessed excavation portion 2, it is carried out not directly from the box-shaped box 1 but through a backfill layer based on crushed stone, gravel, etc. Therefore, it is possible to avoid the problem that the rainwater infiltration portion (the rainwater infiltration hole P, the rainwater infiltration vertical slit S, etc.) of the box-shaped box 1 is clogged with sediment and obstructs the rainwater distribution, and is extremely stable. At the same time that the rainwater infiltration is performed, the infiltration is performed through the backfill layer made of crushed stone, gravel, etc. 3, so that an extremely good and wide-area infiltration action is achieved.

[Brief description of drawings]

FIG. 1 is an explanatory perspective view showing an embodiment of a construction method according to the present invention.

FIG. 2 is a sectional view for explaining a construction method according to the present invention.

FIG. 3 is a perspective view showing a box box used in the present invention.

FIG. 4 is a perspective view showing another embodiment of the box-shaped box used in the present invention.

[Explanation of symbols]

 A Residential zone B Parking lot zone 1 Box-type box Draining hole for rainwater infiltration 1a Perforated plate 2 Recessed excavation section 3 Crushed stone, gravel, etc. 4 Exterior treatment 10 Box-type box S S Vertical slit for rainwater infiltration

Claims (3)

[Claims] 1. A recessed excavation part 2 having a required size is provided in a public plaza-shaped zone, and in the excavation part,
Box-shaped boxes that are configured to allow the permeate outflow of rainwater from both sides are connected in the vertical direction by the required number to form a row of rainwater storage grooves. Multiple groups of mold boxes are arranged side by side in parallel in a plurality of rows, and then, between each of the box boxes 1 in the parallel state, crushed stones, gravel, etc. 3
Rainwater storage characterized by filling the inside of the recessed excavation part 2 with crushed stone, gravel, etc. 3 by filling the same. Penetration method. 2. The rainwater storage according to claim 1, wherein the box-shaped box 1 comprises a perforated plate 1a having perforations P for rainwater permeation on both sides. Penetration method. 3. The rainwater storage according to claim 1, comprising a box-shaped box 10 having vertical slits S for penetrating rainwater on both sides. Penetration method.