JP2001279650A - Drain pipeline constructing pipe and drain pipeline construction method using this - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bury a drain pipeline constructing pipe in the ground by an advancing construction method by using the drain pipeline constructing pipe having a catchment function. SOLUTION: This drain pipeline constructing pipe 1 is constituted by integrally arranging a catchment layer 4 on an outer peripheral surface of a porous drain pipe body 2. A spigot 5 is arranged in the tip part. A socket 6 is arranged in a rear end part. The pipe is successively connected to constitute a drain pipeline.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe construction pipe used for collecting and draining underground water such as groundwater and rainwater and a drainage pipe construction method using the same. is there.

[0002]

2. Description of the Related Art As a conventionally known method for collecting and discharging groundwater, rainwater, and other water that has infiltrated into the ground, a pumping well is excavated from the ground surface and water collected inside the well is pumped. There is a method of burying a perforated drainage pipe in a trench constructed by excavating the ground surface, filling the surrounding area with a water collecting material (crushed stone, chestnut stone, tree branch, etc.) and backfilling it.

[0003]

In each of the above-mentioned methods, a pumping well or a trench is constructed by excavating from the ground surface, and therefore cannot be carried out unless the ground surface conditions are met. Further, even if the construction conditions are adjusted, the method of burying a perforated drainage pipe in the above-mentioned trench has the inconvenience of preparing a water collecting material and filling it around the drainage pipe.

Accordingly, the present invention provides a method of constructing a drainage pipe underground even when construction conditions on the ground surface are not prepared, and burying a perforated drainage pipe when the construction conditions are prepared. An object of the present invention is to provide a drainage pipe construction pipe that can be implemented efficiently and a drainage pipe construction method using the same.

[0005]

Means for Solving the Problems In order to solve the above-mentioned problems, a drainage pipe construction pipe according to the present invention basically has a structure in which a water collecting layer is integrally provided on an outer peripheral surface of a drainage pipe main body. A configuration in which one end of the drain pipe main body protrudes from one end of the water collecting layer to form an inlet, and the other end is recessed from the other end of the water collecting layer to form a receptacle. The connection of each construction pipe can be easily performed.

[0006] Further, it is possible to adopt a configuration in which a smooth layer formed by applying a kneaded product of corrosive organic powders such as starch and polysaccharide powder is provided on the outer peripheral surface of the water collecting layer.

[0007] Further, it is possible to adopt a configuration in which a bottom plate is integrally provided on the lower surface of the water collecting layer. According to this configuration, it is possible to prevent the water collected in the drain pipe from dissipating into the ground below it.

When a drainage pipeline is constructed using the above drainage pipeline, it is effective to use a propulsion method. Further, after burying a propulsion pipe having a diameter larger than the drainage pipe construction pipe in the ground by the propulsion method, the drainage pipe construction pipes are appropriately connected to each other in a pipe formed by the propulsion pipe. It is also possible to adopt a construction method in which the propulsion tube is removed after the insertion. According to this method, the drainage pipe construction pipe does not receive the propulsive force, and the water collecting layer does not slide on the ground.

It is also possible to construct the drainage pipe below the contaminated soil and collect and discharge contaminants contained in the soil to the drainage pipe together with infiltration water such as groundwater.

[0010] As another construction method, there is a construction method in which a drainage pipe construction pipe is installed in a trench excavated from the ground surface and then filled back. This method can be implemented when there are no restrictions on the construction conditions on the ground surface.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an example of a drainage pipe construction pipe 1 of the embodiment. This construction pipe 1 has a porous water collecting layer 4 integrally provided on the outer peripheral surface of a drain pipe main body 3 composed of a fume pipe provided with a large number of water passage holes 2. The size of the drain pipe main body 3 is about 200 to 300 mm. The water collecting layer 4 is formed by mixing coarse sand, crushed stone, chestnut stone, natural or artificial water permeable material or the like alone or in combination with a bonding agent and fixing the mixture to the outer surface of the drain pipe main body 3.

As shown in FIG. 1 (b), at the one end of the drainage pipe construction pipe 1, the tip of the drainage pipe main body 3 projects outside from the water collecting layer 4 to form an outlet for connection. 5 is formed, and at the other end, the drain pipe main body 3 is recessed from the water collecting layer 4 to form a receiving port 6 for connection.

The relationship between the drain pipe main body 3 and the water collecting layer 4 is not only a concentric circle as shown in FIG. 2A, but also an eccentric state as shown in FIGS. May be. Catchment layer 4
May be formed to have a square cross section as shown in FIG. In any of these cases, the bottom plate 7 on the lower surface of the water collecting layer 4 may be provided integrally over the entire length. The bottom plate 7 is an impermeable plate such as an iron plate or a plastic plate, and is provided to prevent water collected in the water collecting layer 4 from dissipating downward.

Further, in any of the above cases,
As shown in FIG. 2E, a smooth layer 8 may be formed on the outer peripheral surface of the water collecting layer 4. This smooth layer 8 is used to reduce friction between the water collecting layer 4 and the surrounding ground when the drainage pipe construction pipe 1 is buried in the ground by a propulsion method described later, and
Is provided to prevent clogging caused by silt or clay in the ground and losing the water collecting function. This smooth layer 8 is formed by mixing water alone or a mixture of corrosive organic powders such as starch (based on wheat, corn, potato, etc.) and polysaccharides (based on guar gum, etc.). It is formed by applying this to a constant thickness.

After the smooth layer 8 is buried in the ground, it is removed by one of the following (1) to (4) or a combination thereof. (1) Dissolve and discharge with groundwater. (2) Decomposed by bacteria in the ground. (3) A liquid containing a chemical or a bacterium that dissolves or degrades starch or polysaccharide is injected under pressure from the inside of the drain pipe main body. (4) Hot water or steam is injected under pressure from the inside of the drain pipe main body.

Next, a method of constructing a drainage pipeline using the drainage pipeline construction pipe 1 will be described.

The simplest method is to form a trench 10 by excavation between the vertical holes 9 on the ground surface, as shown in FIG. Drain pipe construction pipe 1 is connected and buried while sequentially fitting the inlet 5 and the receptacle 6 to each other.
1 is constructed.

In the drainage pipe 11, rainwater and groundwater penetrating from the ground surface are collected in the drainage pipe main body 3 through the water collecting layer 4, and a part of the water is returned to the ground below it. The part is collected in vertical holes 9 and 9. By returning part of the collected water into the ground below, water will remain in the ground to recharge groundwater and at the same time reduce the load on rainwater treatment facilities.

In order not to return to the ground, the drainage pipe construction pipe 1 having the above-mentioned bottom plate 7 is used.

The construction method shown in FIG. 4A is used when the construction conditions on the ground surface are not established, and the drainage is carried out between one vertical hole 9 and the other vertical hole 9 by the propulsion method. The drainage pipeline 11 is constructed by burying the pipeline construction pipes 1 while sequentially connecting them. In this case as well, those having the bottom plate 7 and those not having the bottom plate 7 are selectively used as described above. When it is necessary to reduce the propulsion resistance, the one having the smoothing layer 8 is used.

[0021] This construction method uses a drainage pipe 11 at a deep point.
Therefore, for example, it is effective as a treatment device that is installed below the contaminated soil 12 to collect and discharge harmful substances together with water.

In the method shown in FIG. 4 (b), a propulsion pipe 13 dedicated to the propulsion method is used, and after the pipe is constructed by the same method, the above-mentioned drainage pipe construction pipe 1 is sequentially connected therein. The propulsion tube 13 is pushed out and removed after the pushing is completed. Propulsion pipe 13
As a result, the drainage pipeline 11 constructed by the drainage pipeline construction pipe 1 is exposed in the ground. According to this method,
No propulsive force is applied to the drainage pipe construction pipe 1, and there is no problem of sliding contact with the surrounding ground.

[0023]

As described above, the drainage pipe construction pipe of the present invention is constituted by the porous drainage pipe main body and the water collecting layer formed on the outer peripheral surface thereof. It is possible to omit the operation of filling or filling this, and it is possible to efficiently construct a drainage pipe.

Further, since the construction is performed by the propulsion method, there is no restriction on construction conditions on the ground surface. In addition, by constructing a drainage pipe below the contaminated soil without excavating the contaminated soil, pollutants can be discharged together with the groundwater.

In the case of the propulsion method, the propulsion resistance during construction can be reduced by forming a smooth layer made of corrosive organic powder on the outer surface. Since it is easy to remove the smooth layer after the construction is completed, the water collecting function is not lost.

Further, by returning part of the collected rainwater to the ground, a rainwater treatment facility having a groundwater recharge function can be constructed.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a part of an embodiment. FIG.

FIGS. 2A to 2E are cross-sectional views of modifications of the above.

FIG. 3A is a sectional view of a construction state. FIG. 3B is a sectional view taken along line bb in FIG.

FIG. 4A is a sectional view of another construction state. FIG. 4B is a sectional view of another construction state.

[Description of Signs] 1 drainage pipe construction pipe 2 drainage hole 3 drainage pipe main body 4 water collecting layer 5 inlet 6 receiving port 7 bottom plate 8 smooth layer 9 vertical hole 10 trench 11 drainage pipe 12 contaminated soil 13 propulsion pipe

Claims (8)

[Claims] 1. A drainage pipe construction pipe in which a water collecting layer is integrally provided on an outer peripheral surface of a perforated drainage pipe main body. 2. The drain pipe body has one end protruding from one end of the water collecting layer to form an inlet, and the other end recessed from the other end of the water collecting layer to form a receiving port. The drainage pipe construction pipe according to claim 2. 3. The drainage pipe according to claim 1, wherein a smooth layer formed by applying a kneaded material of a corrosive organic powder such as starch or polysaccharide powder is provided on an outer peripheral surface of the water collecting layer. Construction tube. 4. The drainage pipe construction pipe according to claim 1, wherein a bottom plate is integrally provided on a lower surface of the water collecting layer. 5. A drainage pipe construction method in which the drainage pipe construction pipe according to any one of claims 1 to 4 is buried underground by a propulsion method. 6. A propulsion pipe having a diameter larger than that of the drainage pipe construction pipe according to any one of claims 1 to 4 is buried underground by a propulsion method, and then the propulsion pipe is inserted into a pipe formed by the propulsion pipe. A drainage pipe construction method of connecting and inserting a suitable number of drainage pipe construction pipes, and then removing the propulsion pipe. 7. The drainage pipe according to claim 5, wherein the drainage pipe is constructed below the contaminated soil, and contaminants contained in the soil are collected and discharged into the drainage pipe together with permeated water such as groundwater. 6. The drainage pipe construction method according to 6. 8. A drainage pipe construction pipe according to claim 1, which is installed in a trench excavated from the ground surface,
Drainage pipe construction method to fill back after that.