JPS61158503A - Water pervious paving block - 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 (a) Technical Field of the Invention The present invention relates to the structure of a permeable pavement pro-7i that can drain rainwater.

(0) Background of the technology Rainwater accumulated on the pavement surfaces of sidewalks in parks, shopping streets, etc. must be drained away by some method.

(c) Conventional technology and problems Conventionally, as an effective method for draining rainwater accumulated on the pavement surface, there has been a method of laying concrete slabs for sidewalks with a water slope, and Japanese Patent Application Laid-Open No. 47-30132 As shown in the figure, roads paved with permeable concrete are known.

FIG. 8 is a diagram showing the former method of laying sidewalk concrete blocks with a water slope and draining rainwater accumulated on the pavement surface. As shown in the figure, a plurality of sidewalk concrete blocks a are laid out on the sand Fib so as to form a constant water gradient C by adjusting the thickness of the sand layer. Some of the rainwater percolates through the sand layer, but most of it flows over the sidewalk concrete blocks a and enters the drainage ditch d.

In this case, there are many problems listed below.

First, it requires a water gradient on the pavement surface for drainage, which prevents flat pavement. Unreasonable slopes due to restrictions such as the location of drainage ditches and manholes make walking difficult. Second
However, with this kind of surface drainage, the amount of rainfall is high.1. In case of N, drainage will not be sufficient. Thirdly, water puddles are likely to form when depressions are created in the paved surface due to loosening of the ground. Fourthly,
From a work standpoint, it takes a lot of time to ensure the flatness of the entire sidewalk concrete block while creating a certain water gradient. Moreover, since concrete blocks for sidewalks are not made into units, the time required for these operations is lengthened.

FIG. 9 is a diagram showing a road paved with the latter type of water-permeable concrete. As shown in the figure, water-permeable concrete is cast in a concave shape on a subgrade e to form a water-permeable if, and the concave portion is paved with a normal upper layer paving material g, that is, cement concrete or asphalt concrete.

In such roads partially paved with water-permeable concrete, the drawbacks of water-permeable concrete have come to the fore. In other words, permeable concrete has drawbacks such as insufficient impact resistance and punctures caused by shoes, and the surface of permeable concrete cannot be painted and has insufficient abrasion resistance. .

Moreover, since the blocks are not divided, preparation work cannot be done before the paving work site process, and various operations such as transportation and construction at the paving work site increase, lengthening the work time. Furthermore, if the permeable concrete is damaged, it cannot be replaced, so it takes a long time to repair, and with only permeable concrete, it is not possible to create a free design on the pavement surface.

Purpose of the Invention The present invention was made to solve one problem in the prior art, and its purpose is to make it possible to drain a large amount of rainwater without creating a water gradient, and to improve the performance of paving and repair work. The purpose is to shorten the time, make it difficult for depressions to occur due to loosening of the ground, eliminate the drawbacks of permeable concrete, and furthermore, free up the design of visible surfaces on the pavement surface.

(E) Structure of the Invention In order to achieve the above object, the present invention combines a concrete block and a water-permeable concrete block to form a water-permeable pavement block.

(-) Examples of the invention Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a perspective view of a water-permeable pavement block according to a first embodiment of the present invention.

As shown in the figure, the permeable pavement block 1 according to the first embodiment is a rectangular parallelepiped in which a rectangular parallelepiped concrete block 2 and a rectangular parallelepiped water permeable concrete block 3 are joined and integrated.

The concrete block 2 is a square plate made of ordinary cement concrete, asphalt concrete, or mortar. Of course, you can also use colored makeup blocks.

The thickness of this concrete block 2 is desirably thinner as will be described later. This thickness is determined in a well-balanced manner, taking into consideration strength.

The size of the water-permeable concrete block 3 is determined in consideration of ease of handling during work, penetration of rainwater into the entire area of the water-permeable concrete block 3, and the like.

The state of use of the permeable pavement block according to this embodiment will be explained based on FIGS. 2 and 3.

FIG. 2 is a plan view of a sidewalk formed by laying the permeable pavement blocks according to this example, and FIG.
It is a figure showing A cross section.

Permeable pavement blocks l are placed vertically with a certain gap between them.

They are laid out parallel to each other, forming a lattice pattern. This gap is filled with permeable concrete to form a joint 4.

As shown in the figure, a sand layer 5 is laid on a roadbed 6 at an average height, and a plurality of permeable pavement blocks 1 are laid on this sand layer 5. And these permeable pavement blocks
The gaps between them are filled with permeable concrete. A sidewalk is formed in this way.

Rainwater flows into the joint 4 and the permeable concrete block 3
Penetrates throughout the area by gravity and capillary action. The rainwater that has permeated into this permeable concrete block 3 is further absorbed into the sand layer 5.
to penetrate. In this way, underground drainage is achieved.

According to the water-permeable pavement flock 1 having the above configuration,
Compared to the conventional means of draining rainwater by creating a water gradient, the following effects occur.

First, it becomes possible to drain underground where rainwater permeates from the joints 4 into the permeable concrete blocks 3, thereby eliminating surface drainage and eliminating water gradients. And it can be made into flat pavement.

Second, since underground drainage is used, a large amount of rainwater can be coped with by appropriately widening the cross-sectional area of the joint 4.

Thirdly, since the concrete block 2 and the permeable concrete block 3 are combined into a block, the time required for forming the sand layer 5 is reduced, and the water gradient work is no longer necessary. The working time can be shortened.

Fourthly, since the water-permeable pavement blocks 1 can be made larger and made larger, it is less likely to cause depressions due to loosening of the ground, etc., and less likely to cause water puddles.

Furthermore, the following effects are produced with respect to the conventional road structure paved with water-permeable concrete.

The sidewalk in the conventional road structure paved with permeable concrete has this effect against rainfall within the Ogashira area.
The same area as the tail area was paved with permeable concrete to allow rainwater to permeate into the permeable concrete. but,
-Raindrops within the Ogashira area fall scattered both temporally and spatially, so in order for the amount of rainfall within the Ogashira area to permeate into the permeable concrete without accumulating rainwater, -
It is not necessary to have the same area as the tail area, and the amount of rainfall can penetrate into the permeable concrete with the minimum area.

This minimum area is ensured by the joint 4 made of permeable concrete, and the joint 4 can be considered as a filter, so the ratio of the area So in the tail region to the cross-sectional area 5 (X) of the joint 4 is S o /S(X is approximately given by the following formula.

so kO,

ΔP; pressure difference μ: viscosity of rainwater t: depth of concrete block h: height of rainfall in unit time - The above formula is given by the flow rate Q per unit time flowing through the filter.Filtration confirmed by Darcy This is an application of the basic formula of

As described above, with respect to the amount of rainfall in the tail region, the area of the cross section of the joint 4 allows the amount of rainfall in a certain area to permeate into the permeable concrete block 3 without accumulating rainwater. Therefore, by filling the gaps between the water-permeable pavement blocks with water-permeable concrete and allowing rainwater to permeate through the joints 4, the drawbacks of water-permeable concrete can be eliminated. That is, it is possible to eliminate drawbacks such as induction resistance, abrasion resistance, and difficulty in coloring on the surface of a paved sidewalk. Furthermore, in order to allow the same amount of rainfall to penetrate through the concrete block 2, the depth of the concrete block 2 is reduced, the area of the cross section of the joint 4 is reduced, and the ratio of the area of the cross section of the concrete block 2 is reduced. It can be made larger, and the drawbacks of water-permeable concrete can be more effectively eliminated.

In addition, since the permeable pavement block 1 is divided into blocks,
At the site of the paving work, it is sufficient to fill the permeable concrete between the permeable paving blocks 1 to form the joints 4, so that transportation at the site of the paving work is possible.

Various works such as construction work are significantly reduced, and the work time can be significantly shortened. Furthermore, if the permeable pavement block l is damaged, repair work can be carried out quickly by replacing it.

Next, FIG. 4 shows a water-permeable pavement block according to a second embodiment of the present invention.

As shown in the figure, the permeable pavement block IA according to the second embodiment
is a rectangular parallelepiped, which is divided into two by a sloped surface,
It is made by joining an upper concrete block 2A and a lower spring water concrete block 3A. In the second embodiment, the same effects as in the first embodiment occur.

FIG. 5 shows a water-permeable pavement block according to a third embodiment of the present invention.

As shown in the figure, the permeable pavement block IB of the third embodiment is made by dividing a block with a diamond-shaped cross section into two on the horizontal plane, and joining an upper concrete block 2B and a lower permeable concrete block 3B. It is something.

FIG. 6 is a plan view of a sidewalk formed by laying water-permeable pavement blocks according to the third embodiment.

As shown in the figure, the permeable pavement blocks IB are laid out in parallel vertically and horizontally with certain gaps between them, forming a self-patterned net pattern. This gap will be filled with permeable concrete.
A joint 4B is formed.

By making the cross section of the water-permeable pavement blocks into various shapes such as hexagonal and L-shaped, sidewalks with various patterns can be formed, and the design of the exposed surface can be freely designed.

FIG. 7 is a vertical sectional view of a water-permeable pavement block according to a fourth embodiment of the present invention.

As illustrated, a permeable pavement block I according to the fourth embodiment
C consists of a reinforced concrete block 2C with a ■-shaped cross section and water-permeable concrete blocks 3C buried on both sides of the vertical surface of this reinforced concrete block 2C.

According to this embodiment, in addition to the effects of the first embodiment, it is possible to increase the strength of the water-permeable pavement block IC.

(G) Effects of the Invention As described above, according to the present invention, it is possible to drain a large amount of rainwater without creating a water gradient, and the work time for paving and repair work can be shortened. It is possible to make depressions less likely to occur, eliminate the drawbacks of water-permeable concrete, and furthermore, it is possible to freely design the visible surface on the pavement surface.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a water-permeable pavement block according to the first embodiment of the present invention, FIG. 2 is a plan view of a sidewalk formed by laying water-permeable pavement blocks according to the first embodiment of the present invention, and FIG. The figure is a view showing the A-AIlr plane of Fig. 2, Fig. 4 is a perspective view of a water-permeable pavement block according to the second embodiment of the present invention, and Fig. 5 is a water-permeable pavement block according to the third embodiment of the invention. A perspective view of a pavement block, FIG. 6 is a plan view of a sidewalk formed by laying water-permeable pavement blocks according to a third embodiment of the present invention, and FIG. 7 shows a water-permeable pavement block according to a fourth embodiment of the present invention. FIG. 8 is a diagram showing a conventional means for draining rainwater by setting a drain slope, and FIG. 9 is a conventional cross-sectional view of a road partly paved with permeable concrete. 1... Water-permeable pavement block, 2... Concrete block, 3... Water-permeable concrete block, 4...
Joint, 5...sand layer. Figure 1 Figure 2-A Figure 3 Figure 4 Procedural amendment (March 1, 2006) Commissioner of the Japan Patent Office - Mr. Manabu Shiga■, Indication of the case
591 of the Showa era, Kajishi petition No. 27654
No. 6 No. 2, Name of the invention Water permeable pavement block 3, Relationship with the person making the amendment Applicant address 4-27 Honmachi, Higashi-ku, Osaka #! (362) Name: Takenaka Corporation 4, Agent

Claims (4)

[Claims] (1) A permeable pavement block made by combining a concrete block and a permeable concrete block. (2) The permeable pavement block according to claim 1, wherein the concrete block is a polyhedron. (3) The water-permeable pavement block according to claim 1, wherein the water-permeable concrete block is polyhedral. (4) The permeable pavement block according to claim 1, wherein the concrete block is a plate-shaped body provided with ribs.