JPH0598684A - Underground infiltration method for water from pavement surface - Google Patents

Abstract

PURPOSE:To simply and efficiently infiltrate water such as rain water into the ground widely under the pavement surface. CONSTITUTION:A water guide layer 1 made of a communicating gap forming member is spread under the pavement surface 5, and water guide sections communicated to the water guide layer 1 are opened at proper places on the pavement surface. For actual example, pavement is applied on the water guide layer 1 spread with a palm fiber sheet 3 under a layer of gravel 2, the water guide holes 4 communicated to the water guide layer are provided on the pavement surface 5, and water is infiltrated into the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground infiltration method for water such as rainwater and car wash water from under the pavement surface.

[0002]

2. Description of the Related Art Since the topsoil of urban areas is covered with paved roads and structures, the penetration of water such as rainwater into the underground is considerably hindered. ing. In order to solve this problem, a method is widely used in which a pavement material covering the topsoil is made of a porous material so as to have water permeability to promote penetration of water such as rainwater. However, in this method, the water permeability decreases due to the clogging of the pavement material, and the strength of the pavement material is not sufficient, so that the method is limited to a sidewalk at most, and the applicable locations are unavoidable.

[0003]

DISCLOSURE OF THE INVENTION The present invention overcomes the drawbacks of the conventional permeation of water such as rainwater on the pavement surface, and widely permeates water such as rainwater into the soil under the pavement surface. The purpose of the present invention is to provide a method that enables simple and efficient.

[0004]

As a result of various researches conducted by the present inventors to develop a method for infiltration of water under the pavement surface having the above-mentioned preferable characteristics, as a result, water such as rainwater has a small gap. Focusing on the point that it can move freely if there is, it was found that the purpose can be achieved by laying a water guiding layer consisting of a gap forming member under the pavement surface, and the present invention was completed based on this finding. Came to do.

That is, according to the present invention, a water guiding layer composed of a communicating gap forming member is laid on the lower surface of the pavement surface, and a water guiding portion leading to the water guiding layer is opened at an appropriate position on the pavement surface. It provides an underground infiltration method for water.

The communicating gap forming member constituting the water guiding layer used in the present invention is not particularly limited as long as water such as rainwater can freely move therethrough, and for example, fine communicating such as hard foamed plastics. Plastics with holes, fiber processed products such as fiber knitted fabrics such as coconut fiber sheets, porous materials such as nets, gravel, rubble, stone fragments,
Examples include slag. These may be used alone or may be used in combination of two or more kinds, and are particularly composed of a composite layer of gravel, rubble, stone fragments or slag, and a porous material, especially a coconut fiber sheet. Is preferred. The thickness of this water guiding layer is usually 1 to 20 in the case of a porous material.
cm, gravel, rubble, stone fragments, slag, etc. 3
It is selected within a range of up to 50 cm. Within this thickness range, there is no significant effect on strength.

Further, when a pavement material having fluid drying property or high temperature viscosity, such as fresh concrete or asphalt, is directly hit on the road surface, it is preferable to interpose a partition sheet between it and the communication gap forming member. In this case, the pavement material does not enter the gap of the communication gap forming member, and the inconvenience of reducing the effective communication gap does not occur. When the communication gap forming member is a porous material, this partition sheet may be integrally laminated to form a composite layer by adhering it to the upper surface thereof.

In the present invention, in order to guide water such as rainwater to the water guiding layer, a water guiding portion, such as a water guiding hole or water guiding, which leads to the water guiding layer, for example, L-shaped grooves arranged at one end or both ends of the paving surface. For opening slits and eyes. The clogging of the water conduit can be easily prevented by attaching a simple filter medium to it.

Further, in the case of a paved road, it is convenient that the vibration of the paved surface by the vehicle acts to promote the movement and permeation of rainwater.

[0010]

According to the method of the present invention, the remarkable effect that water such as rainwater can be easily and efficiently permeated widely into the soil under the pavement surface.

[0011]

The present invention will be described in more detail with reference to the following examples. Example 1 As shown in (a) and (b) of FIG.
Water-conducting layer 1 spread over a depth of 40 cm with an area of 50 cm,
And an upper area of 50 cm as shown in (a) and (b) of FIG.
The pavement surface 5 is paved on each of the water-conducting layers 1 in which the palm fiber sheet 3 is laid on the lower surface of the layer of gravel 2 having an inner sloped peripheral portion of 200 cm × 10 cm in depth, and the pavement surface 5 is shown in FIGS. As shown in each of the above, the water-conducting holes 4 communicating with the water-conducting layer were provided to allow water to penetrate into the soil. In both figures,
The ground contact area is about 1 m ² , and the volume of the water guiding layer is about 100 l, which are the same.

[0012] When the amount of the water-conducting layer to be filled with water was measured once a day by pouring water from a predetermined water-conducting hole, when the water-conducting layer was thick and only gravel, the first 70 l, the 20th 40 l, and the water-conducting layer was gravel-palm. In the case of the fiber sheet combination system, the initial 100l, 2
It was 100 liters for the 0th time.

From this, it is clear that the thin layer gravel-coconut fiber sheet combination system is superior in terms of water infiltration ability into soil.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example of a pavement structure in which a water conveyance layer is gravel alone.

FIG. 2 is an explanatory view of an example of a pavement structure in which the water-conducting layer is a gravel-coconut fiber sheet combination

[Explanation of symbols]

 1 Water transfer layer 2 Gravel 3 Palm fiber sheet 4 Water transfer hole 5 Paved surface

Claims (5)

[Claims] 1. A basement for water from below the pavement surface, characterized in that a water-conducting layer composed of a communication gap forming member is laid on the lower surface of the pavement surface, and a water-conducting portion communicating with the water conveyance layer is opened at an appropriate position on the pavement surface. Penetration method. 2. The underground infiltration method for water according to claim 1, wherein the communication gap forming member is a porous material. 3. The underground water permeation method according to claim 2, wherein the porous material comprises plastics, a fiber processed product, and a mesh. 4. The water infiltration method according to claim 1, wherein the communication gap forming member is gravel, rubble, crushed stone material, or slag. 5. The communication gap forming member comprises a composite layer of gravel, rubble, crushed stone material or slag and a porous material.
Underwater seepage method described.