JPH0457812B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a seepage drainage device that drains rainwater or spring water on the ground surface by infiltrating it into a hole drilled in the ground, and a method for cleaning the seepage drainage device. The present invention relates to a cleaning method.

(Prior art) As a conventional technology, a penetration hole of a predetermined depth is drilled from the ground surface into the ground, and a long, cylindrical hole is formed in which a large number of small holes are formed in the peripheral wall deep in the axis of the penetration hole. The drain pipe is housed in a coaxial hole, the outer periphery of the seepage hole that surrounds the outer surface of the drain pipe is filled with gravel, a large diameter and short manhole is provided on the ground surface that communicates with the upper part of the drain pipe, and inside this manhole There was an infiltration and drainage device with a removable filter.

(Problems to be Solved by the Invention) In the conventional system described above, large dust particles such as dead leaves and pebbles that flow in with rainwater are captured by a filter in the manhole, but small dust particles such as soil and sand are captured by the filter. and flows into the drain pipe, and as time passes, the drain pipe and the gravel surrounding its outer surface gradually become clogged, resulting in a decline in its infiltration function.

When the above-mentioned infiltration function deteriorates, the conventional structure cannot clean the drain pipe and the gravel surrounding the outer surface thereof, and the construction has to be redone, resulting in an increase in repair costs.

The object of the present invention is to obtain a novel infiltration and drainage device that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured as follows.

That is, a long cylindrical drain pipe with a penetration hole of a predetermined depth made from the ground surface to the ground and a large number of small holes formed in the peripheral wall, and a drain pipe extending along the outside of the drain pipe. A pipe unit having a small diameter and long drain pipe whose lower end communicates with the lower end of the drain pipe is provided, and this pipe unit is housed coaxially in the axial center of the penetration hole and surrounds the outer surface of the pipe unit. The outer periphery of the infiltration hole is filled with gravel, and a short, large-diameter manhole is installed on the ground surface that communicates with the top of the pipe unit.
A filter is provided in at least the manhole and the drain pipe.

In addition, a discharge hose to which a discharge nozzle that opens laterally at the tip is connected is inserted into the drain pipe, and while supplying cleaning water to this discharge hose, the discharge hose is moved up and down within the drain pipe, and the drain is drained. The drain pipe and the gravel surrounding the outer periphery of the drain pipe are cleaned by suctioning and discharging water flowing down the lower part of the pipe to the outside through a drain pipe.

(Function) Since the present invention has the above configuration, large dust particles are captured by the filter in the manhole, small dust particles pass through the filter and flow into the drain pipe, and the gravel on the outer periphery passes through the small hole of the drain pipe. It will be discharged towards the ground and seep into the underground.

Additionally, when cleaning water is supplied to the discharge hose inserted into the drain pipe, the cleaning water discharged from the discharge nozzle is discharged toward the inner wall of the drain pipe, cleaning the inner wall of the drain pipe and the small holes formed in the wall. At the same time, the gravel surrounding the outer surface of the pipe unit is washed by the washing water discharged from the small holes.

The small dust particles separated from the drain pipe and gravel flow down to the lower part of the drain pipe together with the cleaning water, and then are sucked and removed to the outside through the drain pipe.

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

In Fig. 1, reference numeral 1 indicates a penetration hole opened in the center of the site of the steel tower, and this penetration hole 1 is excavated with an earth auger to have a diameter of about 600 mm and a depth of about 3500 mm, for example.

The depth of the penetration hole 1 is determined by the geology, and is set to a depth that reaches a stratum that has a penetration function, such as a gravel layer.

2 is a pipe unit accommodated in the penetration hole 1.

This pipe unit 2 has many small holes 3 in the peripheral wall.
A hard plastic drain pipe 3 having a shape formed therein and a vinyl chloride drain pipe 4 extending along the outside of the drain pipe 3 and having a lower end communicating with the lower end of the drain pipe 3 are integrated. It becomes connected.

More specifically, the drain pipe 3 has a spiral convex shape (not shown) formed on its peripheral wall to increase deformation strength in the axial direction, has a diameter of about 200 mm, a length of about 3000 mm, and has a lower end. The bottom cover 3b is fitted. This bottom wall 3b is formed by forming a large number of small holes in the peripheral wall.

The drain pipe 4 has a diameter of approximately 65 mm and a length of approximately 3000 mm, is arranged parallel to the outside of the drain pipe 3, and is fastened to the drain pipe 3 at three points at the top and bottom with bands 5, and its lower end is connected to the bottom of the drain pipe 4. It is connected to the side wall of the lid 3b. This drain pipe 4 is for inserting and removing a drain hose 27 of a drain pump 26, which will be described later.

Then, the pipe unit 2 is coaxially housed in the axial center of the penetration hole 1 described above, and then the pipe unit 2 is placed in the outer peripheral part of the penetration hole 1 surrounding the outer surface of the pipe unit 2.
Gravel 6 larger than the diameter of the small hole 3a formed in the peripheral wall of the drain pipe 3 is filled.

In addition, a concrete bottom plate 7 formed in the shape of a disc with a diameter of about 1000 mm and a thickness of about 100 mm is placed on the top of the penetration hole 1.
A cylindrical concrete manhole 8 with a height of about 800 mm and a height of about 800 mm is placed.

The bottom plate 7 has a large-diameter hole and a small-diameter hole penetratingly formed in its axial center and outer circumference, and the upper end of the drain pipe 3 is fitted into the hole in the axial center to form a manhole 8.
The upper end of the drain pipe 4 is passed through the hole on the outer periphery to protrude into the manhole 8, and the cap 9 is removably placed on the protruding end of the drain pipe 4.
Close the upper end of.

A third filter 12 formed into a cylindrical shape with a bottom made of wire mesh is removably inserted into the upper part of the drain pipe 3, and a support rod 1 is fixedly suspended from the axial center of the bottom surface.
2b. 12a is a handle for taking out.

In addition, a second filter 11 and a first filter are installed in the manhole 8.
A filter 10 is removably housed.

The second filter 11 is formed of wire mesh into an inverted cup shape, and is removably mounted on the bottom plate 7 so as to face the upper surface of the drain pipe 3.

Further, the first filter 10 is made of a flexible net bag, and the inner surface of the manhole 8 and the second filter 11
The upper opening edge is pressed into a stepped groove formed on the inner surface of the upper part of the manhole 8 by means of a ring band 13.

Here, the mesh of each of the above filters is the first filter 10, the second filter 11, and the third filter 1.
As you move toward 2, the mesh gradually becomes smaller.

A ring-shaped cover frame 14 is attached to the upper edge of the manhole 8, and a grid-shaped cover, that is, a grating 15, is removably mounted on the cover frame 14.

Note that 16 is a concrete floor, which slopes downward toward the grating 15.

Next, the functions and effects of the above embodiment will be explained.

Rainwater that has fallen onto the concrete floor 16 flows into the manhole 8 from the grating 15, and flows into the first manhole 8.
It passes through the filter 10, the second filter 11 and the third filter 12 and flows into the drain pipe 3,
Next, after flowing out from the small hole 3a of the drain pipe 3 toward the gravel 6, it permeates into the ground and is drained.

In this case, large dust particles such as dead leaves and pebbles that flowed in with rainwater are filtered through the first filter 1 in descending order of size.
0, will be captured by the second filter 11 and the third filter.

The first filter 10 to the third filter 12 are
Manhole 8 and drain pipe 3 as necessary
Take it outside, remove the captured dust, and wash it.

Moreover, each of the first filter 10 to the third filter 12
The small dust that has passed through flows into the drain pipe 3 and adheres to the small hole 3a of the drain pipe 3 and the gravel 6 surrounding the outside thereof, which gradually becomes clogged and the infiltration function decreases. .

If the above-mentioned permeation function deteriorates, clean it as follows.

First, the grating 15 is removed to open the top surface of the manhole 8, and then the first filter 10,
After the second filter 11 and the third filter 12 are sequentially taken out, the cap 9 is removed and the upper part of the drain pipe 4 is opened.

Next, as shown in FIG. 2, the discharge device 21 connected to the discharge pump 20 is inserted into the drain pipe 3, and the lower part of the drain hose 27 connected to the drain pump 26 is inserted into the drain pipe 4. Its lower end reaches the bottom cover 3b.

The discharge device 21 includes a discharge nozzle 23 that opens toward the inner wall of the drain pipe 3 and is attached to the distal end of a flexible discharge hose 22. The discharge nozzle 23 is configured to rotate around a horizontal axis by the water pressure of the cleaning water flowing through the discharge hose 22.

Note that 24 is a guide rod that slides on the inner wall of the drain pipe 3 to position the discharge nozzle 23 in a predetermined direction, and 25 is a roller that supports the discharge hose 22 so as to be able to move up and down.

Then, each pump 20, 26 is started, and the discharge nozzle 23 is moved up and down via the discharge hose 22.

Then, the cleaning water will be sprayed from the discharge nozzle 23 toward the inner wall of the drain pipe 3, and this jetted water will remove small dust attached to the drain pipe 3 and the gravel 6, and the water will be removed from the drain pipe 3 along with the cleaning water. Flows down to the bottom. The fallen dust and washing water are discharged to the outside through the drain hose 27, thereby cleaning the drain pipe 3 and the gravel 6 and restoring the infiltration function.

Note that the drain pipe 3 may be formed of a wire mesh.

(Effects of the Invention) As is clear from the above description, the present invention can smoothly capture and remove large dust particles such as dead leaves and pebbles that flow in with rainwater, and also allows the large dust particles to pass through a filter and be removed from the drain pipe. Small dust adhering to the gravel surrounding this outer surface can be easily removed, and the permeation function can be maintained well over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing the drain pipe and gravel being cleaned. 1... Penetration hole, 2... Pipe unit, 3...
Drain pipe, 3a...Small hole, 3b...Bottom cover, 4
...Drain pipe, 5...Band, 6...Gravel, 7...
Bottom plate, 8... Manhole, 9... Cap, 10
...First filter, 11...Second filter, 12
...Third filter, 13...Ring band, 14
... Lid frame, 15 ... Grating, 16 ... Earthen floor concrete, 20 ... Discharge pump, 21 ...
Discharge device, 22...Discharge hose, 23...Discharge nozzle, 24...Guide rod, 25...Roller, 26
...Drain pump, 27...Drain hose.

Claims (1)

[Scope of Claims] 1. A long, cylindrical drain pipe in which a penetration hole of a predetermined depth is made from the ground surface to the ground, and a large number of small holes are formed in the peripheral wall, and a drain pipe along the outside of the drain pipe. A pipe unit is provided which has a small diameter and long drain pipe which is extended and whose lower end communicates with the lower end of the drain pipe, and this pipe unit is housed coaxially in the axial center of the penetration hole and the pipe The outer periphery of the seepage hole that surrounds the outside of the unit is filled with gravel, a large diameter and short manhole is provided on the ground surface that communicates with the top of the pipe unit, and a filter is installed in at least the manhole between the manhole and the drain pipe. A seepage drainage device characterized by being installed so that it can be removed. 2. Insert a discharge hose to which a discharge nozzle that opens laterally at the tip is connected into the drain pipe, and move the discharge hose up and down within the drain pipe while supplying cleaning water to the discharge hose. 2. The method for cleaning a seepage drainage device according to claim 1, wherein the water flowing down to the lower part of the infiltration drainage device is suctioned and discharged to the outside through a drain pipe.