JPS6299533A - Production of rainwater measure having water permeability - 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 A0 Objectives of the Invention A. Field of Industrial Application The present application seeks to provide a method for manufacturing a water-permeable rainwater basin having a novel configuration.

1. Conventional technology and its problems Rainwater in cities is treated through sewers without penetrating underground. However, this results in a decrease in groundwater, which causes ground subsidence, which causes accidents such as leaning buildings and broken sewer pipes.

In addition, there are limitations and dangers in treating large amounts of rainwater through sewers at once during heavy rains.

B0 Structure of the Invention A8 Means for Solving Problem The present application attempts to solve the above-mentioned problem with the following structure. That is, in the present application, a vertical hole is opened in the bottom 2A of the existing rainwater basin body 2 to a predetermined depth in the ground, and then a vertical nob is inserted into the vertical hole, and the earth and sand in the vertical pipe are removed. After removing the
This is a method for producing a water-permeable rainwater basin, which is constructed by filling the vertical pipe with water-permeable aggregate and further providing a filter part at the upper end opening of the vertical pipe or the upper end opening of the rainwater basin body. .

Example 1 is a water-permeable rainwater basin (hereinafter simply referred to as rainwater basin) obtained by the method of the present invention. The entire manufacturing method will be explained below.

In the first to second steps, the main body of the rainwater basin to be treated is a known rainwater basin, in which a cylindrical side wall 2B is erected and connected to the upper surface of the bottom 2A, and a bar-shaped grating 2C is stretched over the upper surface opening. In the figure, 2D is a connection port for connecting a drain pipe to a man bowl, etc., and 2E is a known curbstone. Therefore, a vertical hole 2F'5r that reaches a predetermined depth underground is opened in the bottom 2A of the existing rainwater basin main body 2. Note that the well-known diamond do+)yvf may be used to open this vertical hole.

Vertical second step - Using the vertical hole 2F, a vibro is driven and suspended, and the upper end of the vertical vibro is slightly protruded into the rainwater basin. For driving this pipe, it is preferable to use a known hydraulic ball driving machine.

In this case, the depth 3A of the vertical vibro is related to the freezing depth, so it varies depending on the region, but in the case of Sapporo, for example, the freezing index is 510, so it is set to about 110σ. The diameter of this vertical pipe is about 25 tan.

6゜Sixth step - Drain the soil inside the vertical pipe to the outside of the rainwater basin body. For this discharge, a known hydraulic soil boring machine may be used.

Fourth step - Filling the vertical pipe with water permeable aggregate 4.

Regarding aggregate 4 for water permeation, ■, No. 5 crushed stone (13-20m foot) 2 to No. 5 crushed stone (
Aggregates mixed at a ratio of 5 to 13 ml (4°) may also be used.

■ Bag 1 made of a cylindrical synthetic resin net containing crushed stone from I above.
It is also possible to use aggregate stored at 0.

(2) Aggregate 4 may be used, in which a highly adhesive acrylic ester additive with adjusted pH is added to the crushed stone in the above 1.

Note that the amount of the additive is approximately 2 inches by weight relative to the crushed stone.

The aggregate 4 may be a plate or the aggregate 4 stored in a bag 10.

Fifth step - A filter portion 5.6 is provided at the upper end opening of the vertical pipe or the upper end opening of the rainwater basin body.

The filter section 5 will be explained. An inverted U on Camp 5C, which is removably covered over the top opening of the vertical vibratory above.
An appropriate number of letter-shaped bones 5B"k are made to stand up, and a fine mesh dust inflow prevention net 5A is stretched using these bones. Also, an appropriate number of arms protrude outward from the camp 5C. 5A' are connected in series, and an inverted U-shaped bone 5A is stretched at the tip of this arm 5A', and a coarse dust and leaf prevention net 5B is stretched using this bone 58''. ing.

The filter section 6 is composed of a receiving metal fitting 6A having a hook attached to the upper side wall of the rainwater basin main body 2, and a bag-shaped filter body 6B that can be freely connected to and detached from the receiving metal fitting 6A.
This bag-like filter body 6B consists of a fine-mesh dust inflow prevention net 6B' located below and a coarse-mesh industrial prevention net 6B'' located above.

C6 action Explain along with the effects.

C1 Effects of the invention A0 Since the present invention is constructed as described above, it is possible to convert many already installed rainwater catch basins into water-permeable rainwater catchments using an extremely simple construction method and at low cost. can.

Thick objects such as leaves mixed in the rainwater that has entered the rainwater basin are removed by the prevention net 5B, and small objects such as dust are removed by the prevention net 5A. After that, some of the rainwater flows toward the manhole, and some of it passes through the permeable aggregate into the ground and joins with groundwater.

C. If the capacity of permeable aggregate decreases, replace it with new aggregate. In this case, in the case of aggregate stored in the bag 10, it is sufficient to pull out the bagged aggregate and insert the bagged aggregate, so a simple operation is sufficient.

2. Aggregates mixed with highly adhesive acrylic ester additives can exhibit the following effects.

When this additive is mixed, a film of the additive will be formed on the surface of the crushed stone, so rainwater will not be absorbed by the crushed stone, so there will be no freezing and heaving even in severe cold.

As for water permeability, as mentioned above, the mixture of No. 5 crushed stone and No. 6 crushed stone at a ratio of 2:1 is 27.2 times more permeable than the commonly used crushed stone (0-40). In addition, when additives are mixed with the No. 5 crushed stone and No. 6 crushed stone, a water permeability of 68 times can be ensured.

[Brief explanation of drawings]

1, 2, 6, and 4 are vertical cross-sectional views explaining the steps in order, and FIG. 5 is an enlarged vertical cross-sectional view explaining the entire final process.
Fig. 6 is an enlarged plan view of the filter section, Fig. 7 is a longitudinal sectional view of the same as above, and Fig. 8. FIG. 9 is a longitudinal sectional view showing another embodiment, FIG. 10 is an enlarged longitudinal sectional view showing another embodiment, and FIG. 11 is an enlarged view of the main parts of the same. 160. Rainwater basin with water permeability, 211. Rainwater basin body,
600. Vertical pipe, 4. ,, water permeable aggregate, 5゜600.
Filter section.

Claims (1)

[Claims] After opening a vertical hole reaching a predetermined depth underground in the bottom 2A of the existing rainwater basin body 2, a vertical pipe is inserted into the vertical hole, and after removing the earth and sand inside the vertical pipe, the vertical pipe is removed. A method for manufacturing a water-permeable rainwater basin, characterized in that the inside is filled with water-permeable aggregate, and further a filter portion is provided at the upper end opening of the vertical pipe or the upper end opening of the rainwater basin body.