JPS62125103A - Water storing and penetrating system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to water storage and infiltration systems for rainwater, sewage, etc.

(Conventional technology) Conventionally, the purpose of sewerage systems has been to quickly remove sewage and rainwater, but speeding up the removal of rainwater leads to temporal concentration of mountain water runoff and increases the maximum runoff area of rivers. Enlarge. However, it is extremely difficult to increase the communication capacity of rivers in a short period of time.

Therefore, rainwater from plazas, residential development areas, etc. is not immediately drained away, but is temporarily retained in storage tanks and allowed to permeate underground.

(Problems to be Solved by the Invention) In the storage infiltration system as described above, the rainwater is collected into a roadside groove or an underground U-shaped groove with a sloped surface and is then guided to a storage tank. ing. The present invention provides a water storage and infiltration system that eliminates the need for such a structure, and in which water does not flow over the surface even in the event of heavy rainfall, and water often overflows from the grooves.

(Means for Solving the Problems) The above-mentioned problems of the present invention are to provide a permeable concrete pavement, a crushed stone roadbed thereunder, a storage tank with a structure with many voids arranged below the crushed stone roadbed, and a storage tank arranged under the crushed stone roadbed. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described below with reference to the accompanying drawings. 1st
The figure is a schematic diagram showing a cross section of the system of the invention. In FIG. 1, numeral 1 represents a general surface such as a plaza. 2 is a permeable concrete pavement, 5 is a crushed stone roadbed, and 4 is a storage tank. Straight arrows indicate the direction of water penetration.

Here, permeable concrete pavement is used, for example, in Japanese Patent Application Laid-open No. 60
- 300 to aoalcg of Portland cement per 1 m5 of cement-concrete mixture, o per part by weight of cement, as disclosed in Publication No. -215565;
oos~0.1 part by weight of binder and 0.35~0.4
5 parts by weight of water and the remainder aggregate, where the aggregate has a weight percentage passing through a 5 mm sieve of 50 to 100%.
, 2.5 The weight percentage passing through the dragon sieve is 8 to 25% when the water/cement weight ratio is 0.55 to 0.43, and when the water/cement weight ratio is thicker than 0.46 (o, 45 or less) In the case of
kneading a cement-concrete mixture with a particle size distribution of 6%, pouring or casting the resulting mixture;
And it can be a water-permeable cement concrete made by hardening. Alternatively, it can be a conventional water permeable asphalt concrete pavement. The hydraulic conductivity is 10 am/sec or more, especially 10
``-''cmlθθC or more is preferable for rapid water penetration.The porosity is generally 10 to 60%.On the other hand, the strength is 4-week bending strength σ28 (cured in constant temperature water at 20℃) of 20. 97 tan 2 or more, especially 25 kg 7 cm
It is preferable that it is 2 or more. The thickness of the permeable concrete layer is determined by its strength and expected loads;
Generally, it is 8 to 20 units.

Crushed stone roadbeds typically contain 5 Q Ill or less of crushed stone.
It is laid to a thickness of 0.00 to 300 u.

The storage tank is 20-5Q! 11 coarse crushed stone or porous aggregate, such as Satolite (trademark: Fuyolite Co., Ltd.). Using the former, 3
A porosity of 070 and a porosity of 50 to 80% can be obtained in the latter case. Although the shape of the entire storage tank is not particularly limited, it may be arranged in a grid pattern 4, for example, as shown in a plan view in FIG. Figure 1 is I of Figure 2.
Corresponds to the cross section on the -1' plane. The size of the storage gI tank can be, for example, 0.5 to 2 m in height, 1 m in width, and 1.5 to 2 m in interval in FIG. 1. Repeat this pattern as many times as necessary.

As shown in FIG. 2, a perforated pipe 5 runs through the center of each reservoir section, connecting the entire reservoir.

The height at which the perforated pipe is installed can usually be near the center of the reservoir. For example, the perforated pipe has a diameter of 150 to 20
It is a perforated pipe made of polyvinyl chloride, and has holes of about 20 diameters spaced at intervals of several to several tens.

In addition, a curbstone 6 is optionally provided at the edge of the square, so that when an extremely large amount of water comes out, water can temporarily accumulate on this approximate surface.
It can then be allowed to seep through the permeable concrete over time. However, if the permeable concrete has a large permeability coefficient, such a curb is not necessarily required.

Furthermore, as an optional accessory structure, the rainwater of the adjacent building 7 shown in FIG. 2 can be connected to a perforated pipe to treat rainwater in the building.

(Function) In the present invention, water directly and quickly permeates the road surface, passes through the crushed stone roadbed, and diffuses into the storage tank or into the soil at locations where there is no storage tank below.

Therefore, there is no need to slope the road surface and provide L-shaped grooves, U-shaped grooves, etc., and water does not remain on the road surface or flow because water permeates quickly. In addition, the entire road surface is permeable, so
Water expands into the soil where there is no reservoir, resulting in a higher overall water infiltration capacity than traditional systems.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the +14 cross section of the system of the present invention;
The figure is a diagram showing an example of a planar arrangement of storage tanks. The numbers in the diagram indicate the following: 1 ... Approximate surface 2 ... Permeable concrete pavement 5 ... Crushed stone roadbed 4 ... Storage tank 5 ... Perforated pipe 6 ... Curb 7...Building

Claims (1)

[Claims] 1. Permeable concrete pavement, a crushed stone roadbed beneath it, a storage tank with a structure with many voids located below the crushed stone roadbed,
and a water storage infiltration system comprising perforated pipes buried in the storage tank.