JP3260808B2 - Rainwater treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating rainwater and a structure for treating rainwater used for implementing the method, and particularly to a method for treating rainwater for infiltrating rainwater into the ground. And rainwater treatment is about the structure.

[0002]

2. Description of the Related Art As a general rainwater treatment system in Japan,
A so-called confluence method in which rainwater flows into a sewer pipe for flowing sewage and is merged. Has been implemented.

[0003]

However, the former merging method is rational because it is possible to treat sewage and rainwater with a single pipe and treat it. There is also a problem that it is not possible to introduce a permeation system for permeating rainwater into the ground because sewage is merged.

[0004] Further, it is practically impossible to change the merging method to a branching method in order to allow rainwater to permeate, since a large change in treatment facilities and the like is required.

[0005] In recent cities, the amount of rainwater to be treated is increasing, and there is a problem that the capacity of the conventionally installed pipes is beginning to run short. On the other hand, since the penetration of rainwater into the ground is small,
There was also a problem that groundwater dropped significantly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a large amount of rainwater temporarily flows into the rainwater of a rainwater pipe consisting of an infiltration pipe and overflows from the flow path of the invert. The present invention provides a method of treating rainwater in which overflowing rainwater is circulated through a sewer.

[0007]

SUMMARY OF THE INVENTION A rainwater treatment system according to the present invention is a treatment system that fundamentally improves on the above-mentioned conventional problems, and the gist of the invention is a rainwater collecting system that collects rainwater falling on the ground. A sewage pipe that is installed and connected to a storm drain connected to a sewage pipe having a large number of permeation holes, and that partly joins the sewage pipe to a location deeper than the storm drain. A sewage basin is provided below and connected to the sewage basin of the storm drain, and the sewage basin that separates the upper sewage basin and the lower sewage basin communicates with the sewage basin on the side of the flow path in the invert of the sewage basin. A vertical hole is provided to allow rainwater overflowing from the rainwater invert channel to flow to the sewer through the vertical hole.

[0008]

[0009]

The method for treating rainwater according to the present invention, as described above,
Rainwater that has fallen on the ground is collected in a rainwater basin, and a rainwater pipe connected to an infiltration pipe with a large number of infiltration holes is connected to this rainwater basin.The rainwater collected in the rainwater basin is collected underground through a rainwater pipe. And permeate through the permeation hole.

[0010] In addition, a sewage pipe for partially combining rainwater with the sewage pipe is laid at a position deeper than the rainwater pipe, and a sewage tank is provided below the rainwater tank to connect the two and connect the two. A vertical hole for the sewage basin is provided on the side of the channel in the invert, so when a large amount of rainwater is collected in the rainwater basin at one time, the rainwater overflowing from the invert channel is passed through the vertical hole. Can be distributed to sewers. For this reason, the rainwater pipe can be configured with a smaller diameter pipe than before.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a main part of a facility for carrying out the treatment system of the present invention.
FIG. 2 is an explanatory longitudinal sectional view showing the arrangement of pipes, FIG. 3 is a plan view of a surface equipment, FIG. 4 is a longitudinal sectional view of a rainwater treatment sill according to the present invention, and FIG. It is.

1 to 5, reference numerals 1 and 1a denote concrete blocks, respectively, which are juxtaposed in a road-side ditch on the ground surface. The concrete block 1 is provided with a rainwater inflow hole 2. Reference numeral 3 denotes a rainwater pipe for flowing rainwater, and reference numeral 4 denotes a sewer pipe for partially combining rainwater with the sewage pipe, which are arranged in the ground at predetermined intervals above and below. The rainwater pipe 3 is formed by connecting an infiltration pipe having a large number of infiltration holes 5 as shown in FIG. A rainwater trough 6 is attached in the middle of the rainwater pipe 3. Similarly, a sewer 7 is attached to the sewer pipe 4 in the middle thereof.

The rainwater trough 6 and the sewage trough 7 are integrally connected vertically as shown in FIGS. 1 and 4, respectively. Inverters 6a and 7a are provided at the bottoms of the rain water masque 6 and the sewage mas 7 respectively, and the storm water flows from the respective inlets 8 and 9 or the rain water pipe 6 and the sew water pipe 7 respectively. The rainwater or sewage flowing into the sewage tank 7 can be smoothly flowed.

The rain water trough 6 and the sewage trough 7 are provided with a communication vertical hole 10 communicating with a part of the rain water trough 6 and the sewage trough 7, and the upper end opening of the communication vertical hole 10 has an invert 6a of the rain water trough 6. A filter 11 is attached to the opening of the communicating vertical hole 10. The lower surface of the sewage trough 7 is provided with a rock stone layer 12. A gravel layer 1 is provided on the lower surface of the concrete blocks 1 and 1a.
3 and the Kuriishi layer 14 are laid in order.

The storm drain 3 according to the present invention is, as described above,
Since it is constituted by a permeation pipe having a large number of permeation holes 5, the rainwater flowing through the rainwater pipe 3 can be permeated into the ground. In addition, since the communication vertical hole 10 is formed from the upper side of the invert 6a of the rainwater trough 6 to the sewage trough 7, a large amount of rainwater temporarily flows into the rain trough 6, and When the water level of the rainwater becomes higher than the upper surface of the side of the invert 6a, the rainwater can overflow to the sewer 7 through the communication vertical hole 10.

[0016]

The rainwater treatment system according to the present invention has the above-described configuration and operation, so that the rainwater flowing through the rainwater pipe can penetrate into the ground. In addition, when the rainwater treatment method of the present invention is used, unlike the conventional combined rainwater treatment method, the amount of fluid to be treated can be significantly reduced, and the rainwater can effectively penetrate into the ground as it is. Can be done.

Further, when the rainwater treatment system of the present invention is employed, the diameter of the rainwater pipe can be reduced, so that the rainwater pipe can be constituted by a small-diameter pipe. Further, the rainwater treatment system of the present invention can be implemented using a conventional combined treatment facility. That is, a rainwater pipe and a rainwater basin are separately provided above the merged pipe, and sewage and overflow rainwater flow through the conventional merged pipe. Is also possible.

In particular, when the rainwater flowing into the rainwater basin temporarily increases and overflows from the flow path of the invert, the overflowing rainwater can be treated by flowing down the lower sewage tank. In addition, the overflow start time can be dealt with by changing the height of the side of the flow path of the rainwater invert according to the diameter of the rainwater pipe.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a facility for implementing a processing method of the present invention.

FIG. 2 is an explanatory longitudinal sectional view showing an arrangement of pipes;

FIG. 3 is a plan view of the surface equipment.

FIG. 4 is a vertical cross-sectional view of a slush for treating rainwater of the present invention.

FIG. 5 is a plan view of a main part of FIG. 4;

[Explanation of symbols]

 1, 1a Concrete block 2 Rainwater inflow hole 3 Rainwater pipe 4 Sewer pipe 5 Infiltration hole 6 Rainwater tank 7 Sewage tank 6a, 7a Invert 8, 9 Inflow port 10 Communication vertical hole 11 Filter 12, 14 Kuriishi Layer 13 Gravel layer

Continuation of the front page (72) Inventor Hiroetsu Serizawa 1-22-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Haneda Hume Kanko Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) E03F 1 / 00 E03F 3/02

Claims (1)

(57) [Claims] 1. A rainwater collecting basin for collecting rainwater falling on the ground, connecting a rainwater pipe connected to a permeation pipe having a plurality of permeation holes to the rainwater trough, and at a position deeper than the rainwater pipe. A sewage pipe for laying a part of the sewage pipe into the sewage pipe laying, and connecting the sewage basin below the sewage basin of the sewage pipe basin to separate the upper sewage basin and the lower sewage basin A vertical hole communicating with the sewer basin is provided at the side of the channel in the invert of the invert, and rainwater overflowing from the channel of the rainwater invert is circulated to the sewer through the vertical hole. Rainwater treatment system.