JPH0447040A - Rain water permeable structure of side-ditch - Google Patents

Abstract

PURPOSE:To prevent a sediment accumulation or a clogging by forming a rain water flow chamber furnishing an opening facing the bottom of the side wall of a side-ditch, and making the bottom surface and a part of the vertical surface of the rain water flow chamber in a rain water permeable surface, and the upper surface in a sediment preventive surface. CONSTITUTION:An opening 30 cut from the lower end is formed at the bottom of the side wall 11 of a side-ditch block 10, and a rain water flow chamber 3 is formed in the ground continued to the opening 30. And the rain water flow chamber 3 is formed of a circular arc form of vertical surface 31, a bottom surface 32, and an upper surface 33, and the vertical surface 31 and the bottom surface 32 are formed in a rain water permeable surface 4, while the upper surface 33 is formed in a sediment preventive surface 5. The rain water flowing in the side-ditch 1 flows in the rain water flow chamber 3 from the opening 30, and penetrates partially into the ground from the vertical surface 31 and the bottom surface 32 which form rain water permeable surfaces. As a result, the permeability of rain water from the rain water permeable surfaces into the ground can be maintained for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a structure for allowing rainwater to permeate into the ground from a side gutter.

(Prior art) Various structures have been proposed as rainwater infiltration structures that allow rainwater to infiltrate into the ground from side gutters. , to prevent clogging of the rainwater infiltration surface into the ground.
Install the filter in an appropriate location, and with this filter,
After filtering rainwater and removing dirt and debris, it was allowed to percolate into the ground through the rainwater infiltration surface.

(Problem to be solved by the invention) However, in the conventional rainwater infiltration structure, it is essential to install a filter, which is disadvantageous in terms of cost, and it takes a lot of time and effort to replace the filter. There was a problem that it was not practical, such as requiring a

The present invention focuses on the above-mentioned conventional problems, and allows rainwater to permeate into the ground from the rainwater permeation surface while preventing the rainwater permeation surface from being clogged with earth and sand without using a filter. The objective is to provide a rainwater infiltration structure for side gutters that allows rainwater to infiltrate.

(Means for Solving the Problems) In order to achieve the above problems, in the rainwater infiltration structure of the present invention, a rainwater flow chamber having an opening facing the bottom of the side wall of the gutter is formed, and the bottom surface of the rainwater flow chamber At least a part of the vertical surface is formed as a rainwater infiltration surface, and the upper surface of the rainwater flow chamber is formed as a sand-stopping surface.

(Function) In the rainwater infiltration structure of the present invention, rainwater flowing in the side gutter along the side wall flows into the rainwater flow chamber through the opening, and a portion of the rainwater that has flowed into the rainwater flow chamber flows into the ground from the rainwater infiltration surface. It permeates into.

Further, the rainwater that has flowed into the rainwater flow chamber flows therein in a whirlpool shape and flows out from the opening.

That is, since the opening of the rainwater flow chamber is formed facing the bottom of the side wall of the side gutter, rainwater flowing in the side gutter flows into the rainwater flow chamber through the opening and flows out again through the opening. Rainwater flows in a whirlpool inside the rainwater flow chamber.

Therefore, since the sediment, etc. is carried along with this eddy flow of rainwater, the accumulation of sediment, etc. in the rainwater flow room is prevented, and the clogging of the rainwater infiltration surface with sediment, etc. is prevented, and the rainwater infiltration surface is The permeability of rainwater into the ground can be maintained over a long period of time.

In addition, since the upper surface of the rainwater flow chamber is formed as a sand-stopping surface, there is no possibility that earth and sand will collapse into the rainwater flow chamber from the stratum above the rainwater flow chamber, and sediment accumulation and clogging can be prevented.

(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of the embodiment will be explained.

FIGS. 1 and 2 show a rainwater infiltration structure according to an embodiment of the present invention, and numeral 1 in the figures is a side gutter.

For the gutter 1, a gutter block 10 is used, which has an open bottom surface by connecting the upper ends of left and right side walls 11.11 with beams 12, 12, and this gutter block 10 is installed on a base concrete layer 21. A bottom concrete layer 22 is formed on the base concrete layer 21. In addition, 13 is a gutter cover.

Further, an opening 30 cut out from the lower end is formed at the bottom of the side wall 11 of the gutter block 10.

A rainwater flow chamber 3 is formed underground continuously from this opening 30.

The rainwater flow chamber 3 is surrounded by an arcuate vertical surface 31, a bottom surface 32, and a top surface 33. It is formed.

Further, the outer shape of the rainwater flow chamber 3 is formed by a frame material 34,
And on the elevation 31 which becomes the rainwater permeation surface 4.

In order to obtain rainwater permeability while preventing landslides, a net 40 is stretched, and the bottom surface 32 serves as a rainwater permeation surface 4.
remains open, and...

The upper surface 33 serving as the earth and sand retaining surface 5 is covered with a concrete layer 50.

The upper side of the vertical surface 31 is sloped outward to prevent landslides, and the bottom surface 32 is sloped downward toward the opening 30 so that rainwater flows smoothly. .

Next, the operation of the embodiment will be explained.

In the rainwater infiltration structure of this embodiment, rainwater flowing in the side gutter 1 flows into the rainwater flow chamber 3 from the entrance part 30, and a part of it infiltrates into the ground from the vertical surface 31 and the bottom surface 32, which become the rainwater infiltration surface 4. I will continue to do so.

Since the opening 30 is formed facing the bottom of the side wall 11, the rainwater flowing inside the side gutter 1 along the side wall 11 flows into the rainwater flow chamber 3 through the opening 30, and then, A vortex flow is generated which flows in a vortex shape and returns to the side gutter 1 from the opening 30 again.

Therefore, the sediment contained in the rainwater is carried along with the eddies, so the accumulation of sediment in the rainwater flow chamber 3 is prevented, and the accumulation and clogging of the rainwater infiltration surface 4 is also prevented. Therefore, the permeability of rainwater from the rainwater permeation surface 4 into the ground can be maintained for a long period of time.

In particular, in this embodiment, the vortex flows along the arcuate vertical surface 31, so the vortex becomes smooth.

Earth and sand can be carried out effectively.

In addition, since the upper surface 33 of the rainwater flow chamber 3 is formed as the earth and sand retaining surface 5, there is no possibility that the earth and sand will collapse into the rainwater flow chamber 3 from the stratum above the rainwater flow chamber 3, thereby preventing the accumulation of earth and sand. Can prevent clogging.

Next, FIGS. 3 to 8 show the other side of the rainwater flow chamber in plan view.

The rainwater flow chamber 3 in FIG. 3 is an example in which the internal space 3a is formed in a rectangular shape, and the rainwater flow chamber 3 in FIGS. 4 and 5 is an example in which the back space 3b is wider than the opening side space 3c. In the rainwater flow chamber 3 shown in FIGS. 6 and 7, the opening side space 3c is the back side space 3b.
A wider example.

Further, the rainwater flow chamber 3 shown in FIG. 8 is an example in which a support 35 is formed in the opening 3o.

Although embodiments of the present invention have been described above with reference to the drawings, the specific configuration of the present invention is not limited to the embodiments described above.

For example, the gutter may be formed by a U system gutter block or may be a three-sided gutter.

In addition, the rainwater infiltration surface may be formed entirely or partially on both the vertical and bottom surfaces of the rainwater flow chamber, or it may be formed completely or partially on either the vertical or bottom surface. good.

Also, the frame material forming the rainwater flow chamber may be formed using concrete, metal, or resin, or the entire rainwater flow chamber may be formed in a box shape, and the portion that will become the rainwater infiltration surface is opened. In this case, in order to prevent landslides from surrounding strata, the openings that serve as rainwater infiltration surfaces may be formed with many small holes or slits, or water-permeable materials such as nets or water-permeable materials may be used. The rainwater permeation surface may be formed using a waterproof sheet or permeable concrete.

Furthermore, crushed stone or chestnut stone may be installed on the strata surface facing the rainwater infiltration surface.

In addition to the concrete layer, the earth and sand prevention surface formed on the upper surface of the rainwater flow chamber may be made of an impermeable material such as a concrete board, a synthetic resin board, or a synthetic resin sheet, or may be made of a material that can prevent landslides. If available, you may use a water-permeable net, sheet, or water-permeable concrete. If the entire rainwater flow chamber is formed into a box shape using permeable concrete, the elevation and bottom surfaces will be formed as rainwater permeation surfaces, and the top surface will be formed as an earth and sand prevention surface.

(Effects of the Invention) As explained above, in the rainwater infiltration structure of the side gutter of the present invention, the rainwater that has flowed into the rainwater flow chamber flows in a vortex shape, and is carried by this vortex flow, and dirt, etc. Because the rainwater is carried away, the accumulation of dirt and sand in the rainwater flow chamber is prevented, and the rainwater infiltration surface is prevented from being clogged with dirt and sand.

Therefore, unlike the conventional method, there is no need for a filter, there is no need for time and effort to replace the filter, and it is possible to maintain the permeability of rainwater from the rainwater permeation surface into the ground over a long period of time.

In addition, since the upper surface of the rainwater flow chamber is formed as a sand-retaining surface, there is no possibility of sediment collapsing into the rainwater flow chamber from the strata above the rainwater flow chamber, which has the effect of preventing sediment accumulation and clogging. is obtained.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the rainwater permeation structure of the embodiment of the present invention;
FIG. 2 is a cross-sectional view showing the rainwater infiltration structure. FIGS. 3 to 8 are explanatory plan views showing the other side of the rainwater flow chamber. 1: Gutter 3: Rainwater flow chamber 30: Opening 31: Elevation 32: Bottom 33: Top 2 Rainwater infiltration surface: Earth and sand prevention surface

Claims (1)

[Claims] 1) A rainwater flow chamber is formed with an opening facing the bottom of the side wall of the gutter, at least a portion of the bottom and vertical surfaces of the rainwater flow chamber are formed as rainwater infiltration surfaces, and the top surface of the rainwater flow chamber is provided with a sand stopper. A gutter rainwater permeation structure characterized by being formed on the surface.