JPH03267405A - Method for paving sidewalk in low water permeable soil area - Google Patents

Abstract

PURPOSE:To facilitate drainage by arranging horizontally and parallelly rows of hollow bodies provided with openings on the upper surface and on at least one of other surfaces thereof over a roadbed to form a water storage layer and providing a permeable pavement slab with water passages vertically passing therethrough. CONSTITUTION:The ground G is digged up to expose a loam layer 1 and crushed stones 2a are laid over the layer 1, which are compacted by means of a road roller to form a roadbed 2. A large number of reinforced concrete pipes 3, hollow bodies with their upper and lower ends opened, are provided, standing erect, horizontally in rows on the roadbed 2 to form a water storage layer 4. Thereafter, mortar is applied to the upper end surfaces of the pipes 3, on which permeable pavement slabs 5 are laid one by one so as to be fixed thereto and joint sealing material is filled into joints 5 to pave a sidewalk. And the slabs 5 are made up of ceramic tiles, wherein water passages 5b are provided. As a result, stormwater is temporarily held in the layer 4, preventing thereby the sidewalk from being flooded with stormwater.

Description

[Detailed description of the invention] A. Industrial application field The present invention provides a water storage layer on soil with poor permeability such as a loam layer or a clay layer, so that even during heavy rain, rainwater does not overflow on the sidewalk or cause water puddles. This article concerns a method for paving sidewalks in areas with poor permeable soil.

Here, the term "sidewalk" is meant to include general sidewalks, promenades in parks, etc., porches, terraces, etc.

口 Conventional technology The rainwater that falls on the sidewalk quickly soaks into the ground.
In order to prevent water from forming on sidewalks, various paving materials with good water permeability have been developed, and sidewalks have been paved using these materials. The permeable pavement method involves digging to a desired depth regardless of the soil quality, forming a crushed stone roadbed layer with a thickness of approximately 150 to 200 mm on the surface of the excavated soil, and Approximately 30-50mm above the roadbed layer
A layer of sand or semi-dry mortar with a thickness of

C. Problems to be Solved by the Invention The above-mentioned conventional permeable pavement pavement method for sidewalks is effective to a certain extent in areas with normal soil types, and allows rainwater to quickly seep into the ground to prevent water from forming on sidewalks. was. However, in loamy and clayey areas that contain approximately equal parts of sand, silt, and clay, - sometimes when a large amount of rain falls on the sidewalk, the rainwater quickly seeps from the permeable pavement board into the crushed stone subgrade layer. However, due to the poor permeability of the loam and clay layers, rainwater accumulates on the loam and clay layers, and as a result, rainwater eventually overflows onto the permeable pavement boards or forms puddles. Despite the use of water-permeable pavement boards, the original water-permeable function of the water-permeable pavement boards is not fully demonstrated, which confuses pedestrians.

2. Means for Solving the Problems In view of the problems of the conventional permeable pavement method for sidewalks in soil areas with poor permeability such as loam layers and clay layers, the present invention provides a method that allows permeable pavement to penetrate from permeable pavement boards to crushed stone roadbed layers. This system provides a sidewalk paving method that stores rainwater that collects on loam and clay layers near the top of the crushed stone roadbed layer to prevent it from overflowing onto the sidewalk. Forming a roadbed of appropriate thickness with crushed stone, and forming a water reservoir by horizontally arranging hollow bodies of appropriate height each having openings on the upper surface and at least one other surface on the roadbed; The purpose of this method is to lay a water-permeable pavement board made of inorganic material with a water passageway penetrating vertically above the water storage layer at a predetermined height relative to the ground surface.

In addition, a hollow body of an appropriate height with openings on the top surface and at least one other surface is crushed horizontally on soil with poor permeability to form a water storage layer, and upper and lower frames penetrating the upper and lower frames are formed on the water storage layer. The purpose of this project is to install permeable pavement blocks made of inorganic material with water passageways at a predetermined height above the ground surface.

E. Form a roadbed of an appropriate thickness with crushed stones on soil with poor permeability, arrange hollow bodies with openings on the roadbed to form a water storage layer, and place inorganic materials on top of the water storage layer. Laying permeable pavement plates or forming the water storage layer directly on poor permeable soil,
If a sidewalk is paved by laying a permeable pavement board made of inorganic material on top of the water storage layer, even if it rains occasionally, most of the rainwater will pass through the permeable pavement board and be temporarily stored in the water storage layer, and then removed. Since rainwater permeates through the roadbed and into the soil with poor permeability, there is no chance of rainwater overflowing or forming puddles on the sidewalk.

EXAMPLE The method of paving a sidewalk in a soil area with poor permeability according to the present invention will be explained based on the drawings.

As shown in Figures 1 and 2, the ground G is approximately 1200~12
The loam layer 1, which has poor permeability, is excavated by 50 mm, and crushed stones 2a are placed on top of the loam layer 1 by approximately 150 to 20 mm.
9. Next, a hollow body with an inner diameter of 150 mm, a pipe thickness of 24 mm, and a length of 1000 mm with open upper and lower surfaces is placed on the road bed 2. A large number of reinforced concrete pipes 3 are arranged horizontally in rows. A water storage layer 4 is formed by gathering a large number of reinforced concrete pipes 3 having through holes 3a having an inner diameter of 150 mm. Then, mortar is applied to the upper end surface of each reinforced concrete pipe 3, and permeable pavement boards 5 constructed as follows are laid one by one on top of the mortar and fixed to each reinforced concrete pipe 3, and the adjacent pavement The joint 5a between the plates 5.5 is filled with a joint material.

In this way, the permeable paving boards 5, which pave the sidewalk by laying a large number of permeable paving boards 5 at a predetermined height from the ground surface, are made of ceramic tiles with a length of about 225 mm, a width of about 225 mm, and a thickness of about 40 mm. , a water passageway 5b that penetrates upward and downward and expands toward the end.
5 each, so the water permeability is extremely good.

A sidewalk paved by the method described above has - Even when it rains a lot, most of the rainwater does not accumulate on the sidewalk, but flows into the water storage layer 4 through the permeable pavement board 5, which has good water permeability.
There, water is stored and seeps from the roadbed 2 to the loam layer 1, so there is no chance of rainwater overflowing or forming puddles on the sidewalk.

Also, if the soil condition is hard, such as loam layer 1 or clay layer,
If the hollow body with the exit opening does not cut into the loam layer 1, etc., the step of forming the roadbed 2 with crushed stone 2a is omitted,
Hollow bodies such as the above-mentioned reinforced concrete pipes 3 are arranged horizontally directly on the loam layer 1 to form a water storage layer 4, mortar is applied to the upper end surface of each reinforced concrete pipe 3, and the above-mentioned permeable pavement is applied on top of the mortar. The boards 5 are laid one by one and fixed to each reinforced concrete pipe 3, and the paving boards 5 adjacent to each other are
．． When the joints 5a between the holes 5 are filled with a joint material, the same effect as described above can be obtained.

In this embodiment, an inorganic reinforced concrete pipe 3 is used as the hollow body forming the water storage layer 4, but an inorganic electrical wire pipe 6 as shown in the third figure or a concrete block 7 as shown in the fourth figure may be used instead. Alternatively, a hollow body made of an organic material such as fiber-reinforced plastic may be used.

In addition, in order to form the water storage layer 4, in addition to arranging the hollow bodies with openings directly in close contact with each other, as shown in FIG. When hollow body units 10 formed by fitting a plurality of hollow bodies 9 with exit openings into a fixed frame 8.8 made of rubber are arranged in rows on soil with poor permeability or on a roadbed, on-site construction is facilitated. Become.

In order to improve the flow of rainwater to the water storage layer 4, a groove 3b is provided on the upper end surface of the reinforced concrete pipe 3, and a groove 68 is provided on the upper end surface of the electrical wire pipe 6.
You may also use one with engraved on it.

The dimensions shown in the above embodiments are not limited to these, and may be changed as appropriate depending on the conditions required for the sidewalk, the soil conditions such as loam layer and clay layer, the difficulty of construction, etc.

G. As described in the detailed description of the invention, the method of paving a sidewalk in a soil area with poor permeability according to the present invention involves arranging hollow bodies with openings in the horizontal direction on soil with poor permeability to form a water storage layer. Because permeable pavement boards are laid on top of the water storage layer, even in the event of heavy rain or a large amount of rain at one time, most of the rainwater does not collect on the sidewalk and flows through the permeable pavement boards, which have good water permeability, to the water storage layer. The practical value of this system is that the rainwater flows into the road, where it is stored, and then seeps from the roadbed into the loam layer, preventing rainwater from overflowing or forming puddles on the sidewalk, preventing confusion for pedestrians, etc. There is something big.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the method of paving a sidewalk in a soil area with poor permeability according to the present invention, FIG. 2 is an exploded perspective view of an embodiment of the method of paving a sidewalk in a soil area with poor permeability, and FIG. FIG. 4 is a perspective view showing a state in which electric wire pipes are arranged in a row, FIG. 4 is a perspective view showing a state in which concrete blocks are arranged in a row, and FIG. 5 is a perspective view showing an example of a hollow body unit. 1.. Loam layer, 2.. Roadbed, 2a.. Crushed stone 3.. Reinforced concrete pipe, 3a.. Through hole, 3b.. Groove, 4..
Water storage layer, 5... Permeable pavement board 5a... Joint, 5b... Water channel, 6... Electrical pipe, 6a... Groove, 7... Concrete block 8... Fixed frame, 8a... Water permeable hole, 9...・Hollow body,
1o...Hollow body unit

Claims (1)

[Claims] 1. Forming a roadbed of appropriate thickness with crushed stones on soil with poor permeability,
A water storage layer is formed by horizontally arranging hollow bodies of appropriate height each having openings on the upper surface and at least one other surface on the roadbed, and a water passageway penetrating vertically above the water storage layer. A method of paving sidewalks in areas with poor permeable soil, which is characterized by laying permeable pavement plates made of inorganic materials at a predetermined height relative to the ground surface. 2 Hollow bodies of appropriate height each having openings on the upper surface and at least one other surface are arranged horizontally on soil with poor permeability to form a water storage layer, and the hollow bodies are penetrated vertically onto the water storage layer. A method of paving sidewalks in areas with poor permeable soil, which is characterized by laying permeable pavement boards made of inorganic material with water passages at a predetermined height from the ground surface.