JP2588091B2 - Construction method of culvert drainage pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method in which a bullet is towed by a towing machine to provide a culvert.

[0002]

2. Description of the Related Art Conventionally, there are various methods for constructing a bullet culvert. For example, a method in which only bullets travel in the ground to provide an underdrain, a method in which smooth pipes are buried after bullet travel, a method in which a belt-like sheet is formed in a tubular body to form an underdrain, and a method in which a pipe is mounted on a tow machine There was a method of continuously laying a pipe immediately behind a bullet. Also, Japanese Patent Application Laid-Open No. 2-1424
No. 18 uses special pipes that exude liquid or gas.
Using a pipe support that vertically rotates the pipe
Equipment) and excavation of the pipe tip
By connecting to the grinder and running the drilling plumbing truck,
Pull a pipe into the ground while cutting through the green grass area with an excavator
It describes how to insert it.

[0003]

The construction method using a bullet culvert is basically a method of forming a culvert by running a bullet. Therefore, compared with a method of forming a groove by a trencher or the like and embedding a corrugated pipe, the method is not used. And the construction speed is extremely fast. However, for example, a so-called mole culvert in which a pipe is not buried has a drawback that the culvert is easily buried.

[0004] The method using a smooth pipe has a diameter of 5 pipes.
When the thickness is 0 mm or more, it is difficult to wind and a long object cannot be used, so that a relatively thin tube is buried, so that there is a problem that sufficient drainage cannot be performed. Further, when the wall thickness of the pipe is reduced, the pipe becomes lighter, the flexibility of the entire pipe is generated, and winding becomes possible. However, there is a problem that the pipe is destroyed because the earth pressure resistance is reduced.

[0005] Further, in the case where the belt-shaped sheet is formed into a cylindrical body to form a culvert, the earth pressure resistance is low as in the above case.
There was a problem that the cylinder was easily destroyed.

Further, a method of laying a pipe put the tube in traction machine, since it is where the tube is bent substantially at a right angle, there is a problem with that often the tube is cut further, JP-2-
In the method of 142418, the pipe support rotates vertically.
As a result, the pipe that is drawn out will loosen and deform due to gravity,
If it is difficult to smoothly pull out and bury the pipe
Was Tsu problem there say.

[0007] These conventional culverts are usually used with a smooth outer shape in order to reduce the resistance against the soil as much as possible when drawing the pipe behind the bullet. This is because avoidance of construction troubles and emphasis on construction speed are emphasized, and it can be said that the size of the pipe and the strength of the pipe against earth pressure have been almost sacrificed in the past.

[0008] The present invention has been made in view of such a problem, and the pipe diameter has a sufficient size as a culvert drain pipe.
Moreover, an object of the present invention is to provide a construction method capable of constructing a corrugated pipe having a large earth pressure resistance by a bullet culvert.

[0009]

Means for Solving the Problems To achieve the above object, a method for constructing a culvert drainage pipe according to claim 1 of the present invention comprises first forming a groove for introducing a corrugated pipe, and winding the groove behind the groove. Place the turntable on which the corrugated pipe is placed substantially horizontally, and attach one end of the corrugated pipe detachably to the back of the bullet pulled by the towing machine, and run the towing machine to place the corrugated pipe underground. It is characterized by being retracted. And the application of claim 2
The construction method is a pedestal where the turntable has multiple legs
And a turntable rotatably provided on the pedestal,
And a support bar erected at the center of the turntable.
It is characterized by the following.

[0010]

According to the present invention, a groove for introducing a corrugated pipe is formed, and the corrugated pipe is on a turntable installed substantially horizontally. When the corrugated tube is pulled into the corrugated tube, the irregularities on the outer surface of the corrugated tube are pulled out smoothly without almost any resistance, and since the corrugated tube is pulled out while the turntable is rotating, the tube is not pulled strongly so that the tube is torn. It does not break or break the connection between the bullet and the tube.

Further, since the turntable on which the corrugated tube is mounted can be sent out simply by placing it behind the groove for introduction,
Advantage of labor on the construction is not applied there is, in particular,請
In the case of a turntable used in the construction method of claim 2, the pedestal
Do not roll when the legs are partially cut into the ground
It can be installed almost horizontally with good stability, so the corrugated tube can be sent out
Ing more smoothly. Also, by using a corrugated tube, it can be wound even if the tube diameter is 50 mm or more, and is lightweight and has high earth pressure resistance.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing one embodiment of the construction method of the present invention, wherein 1 is a corrugated tube made of synthetic resin. As the corrugated tube 1, a tube having an annular peak and a valley alternately or a tube in which the peak and the valley are spiral are used. Since these pipes are formed with thin ridges and valleys, they are flexible and can be easily wound. The pipe used for drainage of culverts has an inner diameter of about 50-100m.
m, having an outer diameter of about 60 to 120 mm and a length of about 30
Those having m to 100 m are suitably used. In addition, many small holes are drilled in the valleys of these tubes, and the opening ratio is 3
% And a water absorption of about 85 to 90%. The tube is made of a thermoplastic resin such as polyvinyl chloride or high-density polyethylene. Such a long tube 1
Is transported to the construction site as a scroll.

In the construction method of the present invention, first, a trench 2 is dug in advance on a downstream side of a muddy land, a wetland, or a wet field (hereinafter, referred to as a field, etc.) 3 to the extent that a drainage pipe can be buried. A bullet 12 for forming a culvert 20 at the tip of a shank 11 mounted on the towing machine 10 and an auxiliary bullet 1
3 and the corrugated tube 1 is firmly and detachably connected to the rear of the auxiliary bullet by a connecting member 14, and the groove 2
The towing machine 10 is caused to travel to a predetermined position in the field 3 or the like. At this time, the corrugated tube 1 is placed on a turntable 4 installed substantially horizontally, and when the end of the tube 1 is pulled, the turntable 4 rotates and the tube 1 is sent out with almost no resistance. I have. Here, the turntable 4 is preferably located near the groove 2 and behind the traction machine 10. Since the outer surface of the corrugated pipe 1 has an uneven shape, a strong resistance is generated when it comes into strong contact with earth and sand, and the towing machine 10 pulls the pipe 1 with a strong force, so that the pipe 1 is torn or the bullet 13 and the pipe 1 Care must be taken because the connecting part may come off. Therefore, it is important that the turntable 4 is located at a position where the pipe 1 is smoothly introduced into the culvert 20.

FIG. 2 is a perspective view showing an example of the turntable. In FIG. 2, the turntable 4 is provided with a pedestal 15 below, and under the pedestal 15, four legs 16 are provided to place the pedestal 15 in a stable state. With the support of the legs 16, even the uneven ground can be installed without tilting or rolling. A rotary shaft (not shown) is provided at the center of the pedestal 15, and a rotary table 17 is provided above the rotary shaft. Four support rods 14 are erected near the center of the turntable 17, and these support rods 14 are inserted into the center of the wound corrugated tube. The number of the support rods 14 may be one or more, but three or more.
Above is preferred.

The towing machine 10 is preferably an earth-moving vehicle such as a bulldozer or an agricultural vehicle such as a cultivator.

Further, the periphery of the corrugated pipe 1 used as the culvert drainage pipe may be filled with a water permeable material such as peach, but in places where the soil is good, sufficient drainage is performed without the water permeable material. The culvert drainage pipe according to the present invention has a depth of 1 m or less, and is gradually shallow in the direction in which the traction machine 10 moves so that the level is substantially horizontal or the downstream side becomes low. It is desirable to do. When the corrugated pipe 1 is laid in the culvert 20, it is preferable to attach a rising pipe (not shown) at the upstream end so that maintenance and management can be performed at a later date. The downstream end of the pipe 1 is connected to a drain pipe such as a non-porous pipe using a joint.

[0018]

As is clear from the above description, the method of constructing the culvert drainage pipe of the present invention is to construct the culvert using a long corrugated pipe having an uneven surface by the bullet culvert method. The turntable is placed substantially horizontally behind the dug groove, and while the corrugated pipe is smoothly fed out therefrom, the corrugated pipe is introduced into the culvert formed by the bullets. However, since the pipe can be laid smoothly and continuously without almost any resistance, the pipe has a remarkable effect that the pipe can be cut and deformed without any trouble and can be carried out quickly. Further, since the pipe is a corrugated pipe, it is lightweight, has high earth pressure resistance, and has an effect that the drainage function is exhibited for a long period of time.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing one embodiment of a construction method of the present invention.

FIG. 2 is a perspective view of a turntable used in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated tube 4 Turntable 10 Traction machine 12 Bullet 13 Auxiliary bullet

Claims (2)

(57) [Claims] A groove for introducing a corrugated tube is formed, and a turntable on which a corrugated tube wound around the groove is mounted is placed substantially horizontally, and one end of the corrugated tube is connected to a traction machine. construction methods of underdrain pipe, characterized in that detachably attached to the rear of the towing bullets, is traveling towers draw the wave type pipe in the ground by the. 2. A turntable having a plurality of legs.
A pedestal and a turntable rotatably provided on the pedestal
And a support bar erected at the center of the turntable.
2. The method for constructing a culvert drainage pipe according to claim 1, wherein: