JPH0351383Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a back water treatment device for earth retaining walls, water collection wells, etc.

[Conventional technology and problems]

For example, in order to prevent cliff collapse in mountainous areas, retaining walls and slope protection spraying are being constructed, and water collection wells are being dug to secure water resources.

By the way, in order to prevent retaining walls and slope protection spraying as described above from being destroyed by earth pressure due to water seeping into the back soil, it is necessary to drain water from the back soil.

In the case of water collection wells, it is necessary to reliably extract the water contained in the surrounding soil and improve the water collection efficiency at the same time as improving the soil.

As shown in Figs. 6 and 7, the conventional drainage structure involves boring a water collection hole 12 in the ground or soil 11, and communicating the end of this water collection hole 12 with a drainage hole provided in the concrete frame. , from the drainage hole to the water collection hole 12
A porous pipe 13 having a diameter smaller than that of the water collection hole 12 is inserted therein, and the end of the pipe 13 is made to protrude outside of the concrete frame.

By the way, the water drainage structure as described above has a hollow water collection hole, so the water content condition is completely different from that of soil.
Only a portion of the water appears as water droplets on the inner circumferential surface of the water collection hole 12, and most of the water does not reach the water collection hole 12 because it is soaked into the saturated or unsaturated portion of the soil.

For this reason, when the water collection hole 12 is provided, water completely flows out only at the point where it reaches the water vein, and there is a problem that the water draining effect is extremely poor.

This invention was made to solve the above-mentioned problems, and the purpose is to provide a backside water treatment device that can efficiently and reliably extract backside water.

[Means for solving problems]

In order to solve the above-mentioned problems, this invention is a water drainage member formed by covering the outer periphery of a porous pipe filled with water-absorbing material with water-absorbing material, and inserting a porous extraction pipe into the inner water-absorbing material. was buried in the soil behind the concrete frame, the end of this drainage member was inserted into a drainage hole provided in the concrete frame, and the evaporation panel placed on the outer surface of the concrete frame was connected to the inner water absorption material of the drainage member. It is a structure.

[Effect]

The outer water-absorbing material of the drainage member buried in the back soil of the concrete frame absorbs the water in the soil, and the water content of the back soil and this water-absorbing material becomes approximately equal, and the water sucked into the outer water-absorbing material is transferred to the porous pipe. The water that fills the entire length of both the inner and outer water-absorbing materials is drawn into the evaporation panels placed outside the concrete structure by capillary action, and some of it evaporates while the rest becomes water droplets. It drips.

Further, a portion of the water impregnated in the inner water-absorbing material enters the porous extraction pipe and flows out to the outside of the concrete frame through this extraction pipe.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the diagram, soil B on the back of concrete frame A
As shown in FIGS. 1 and 2, the water drainage member 1 embedded inside covers the outer periphery of a porous pipe 3 filled with a water absorbing material 2 with a water absorbing material 4, and inserts porous holes at uneven positions within the internal water absorbing material 2. It is formed by inserting a sex extraction tube 5.

Both water absorbing materials 2 and 4 are made of felt, nonwoven fabric, open-cell sponge, etc., and the porous pipe 3 and extraction pipe 5 are made of synthetic resin.

The concrete body A is provided with a drainage hole 6 having an inner diameter into which the outer water absorbing material 4 fits, and the drainage member 1 buried in the back soil B is connected to the outer water absorbing material 4 as shown in FIG.
The ends of the perforated pipe 3 and the inner water-absorbing material 2 match the outer surface of the concrete frame A, and the ends of the porous pipe 3 and the inner water-absorbing material 2 match the outer water-absorbing material 4.
An evaporation panel 7 protruding slightly outward from the end of
is installed.

The evaporation panel 7 has a water-absorbing material 9 such as felt, nonwoven fabric, or sponge inside a case 8 with an open front.
The case 8 is fitted and fixed onto the end of the porous pipe 3, and the end of the inner water-absorbing material 2 and the water-absorbing material 9 are connected, and the end of the extraction pipe 5 is connected to the water-absorbing material 9. penetrates through.

Although the evaporation panel 7 is spaced apart from the outside of the concrete frame A, the case 8 is omitted and the water absorbing material 9 is used instead.
may be directly stretched on the outer surface of the concrete frame A, or the outer water absorbing material 4 of the drainage member 1 and the water absorbing material 9 may be brought into contact with each other.

In addition, in the case of the concrete frame A in Fig. 3,
It is a retaining wall that prevents cliff collapse in mountainous areas, etc.
FIG. 5 shows contact elements forming a water collection well.

The treatment device of this invention has the above-mentioned configuration, in which a water collection hole with an inner diameter into which the drainage member 1 fits is bored in the back soil B, and the end of the drainage member 1 inserted and buried in this water collection hole is covered with concrete. Water collection hole 6 of frame A
The evaporation panel 7 is attached to the drainage member 1 that fits into the concrete body A and projects from the outer surface of the concrete body A.

The water in the back soil B is absorbed by the outer water absorbing material 4 and the inner water absorbing material 2.
The water content of both the water absorbing materials 2 and 4 and the backing soil B become approximately the same, and the water in the backing soil B reliably flows into both of the water absorbing materials 2 and 4.

The water in both water-absorbing materials 2 and 4 is sucked by the water-absorbing material 9 of the evaporation panel 7, and while some of it evaporates, the rest becomes water droplets and is extracted to the outside of the back soil B.

Further, in the water draining member 1, a part of the water impregnated in the inner water absorbing material 2 enters into the extraction pipe 5 and directly flows out to the outside of the concrete frame A.

〔effect〕

As described above, according to this invention, a water-absorbing material is provided inside and outside the porous pipe to form a drainage member, this drainage member is buried in the soil at the back, and an evaporation panel placed outside the concrete frame is installed as the drainage member. Since it is connected to the water-absorbing material, the water-absorbing material in the drainage member becomes approximately equal to the water content of the backing soil, allowing water from the backing soil to smoothly infiltrate into the drainage member, and at the same time directing water from the drainage member to the outside of the concrete structure using the evaporation panel. Therefore, water can be drained from the back soil efficiently.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing a drainage member of a treatment device according to this invention, Fig. 2 is a longitudinal sectional side view of the same, Fig. 3 is a longitudinal sectional view of the same used for rear treatment of a retaining wall, and Fig. 4
The figure is an enlarged view of the main parts of the same as above, Figure 5 is a vertical sectional view used for back treatment of a water collection well, Figure 6 is a vertical front view showing conventional back treatment, and Figure 7 is a longitudinal sectional side view of the same. . 1... Water drainage member, 2, 4... Water absorption member, 3...
Porous pipe, 5...extraction pipe, 7...evaporation panel,
A... Concrete frame, B... Back soil.

Claims (1)

[Scope of utility model registration request] A drainage member is formed by covering the outer periphery of a porous pipe filled with water-absorbing material with water-absorbing material and inserting a porous extraction pipe into the inner water-absorbing material, and burying it in the soil behind the concrete structure. A back water treatment device in which an end of the is inserted into a drainage hole provided in a concrete framework, and an evaporation panel arranged on the outer surface of the concrete framework is connected to an inner water absorption material in the drainage member.