JPH06108522A - Drain pipe - Google Patents

Abstract

PURPOSE:To provide a drainage pipe of which rise and deformation are prevented and which is low in cost by eliminating the mounting of rise prevention members and deformation prevention members. CONSTITUTION:A drain pipe is the water drainage pipe for burying under the ground made of thermoplastic resin, formed into cylindrical shape, and provided with a step part 3 with continuous upper surfaces 2 in longitudinal direction on both external surfaces of a middle part in vertical direction of a drainage pipe body 1. A soil load is applied to the upper surface 2 of the step part 3 with the drainage pipe buried under the ground to prevent the drainage pipe from rising by a soil pressure from the underside. Also the drainage pipe body 1 is formed cylindrically, and soil-withstanding strength from side is increased as compared with that of a drainage pipe the upper end of which is opened continuously to prevent the drainage pipe from deforming.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pipe used as a road gutter in a mountainous area, a drainage groove on a sloping ground or a slope, a waterway for irrigating a field, and the like.

[0002]

2. Description of the Related Art Heretofore, as this type of drainage pipe, a drainage pipe having a U-shaped cross section and a continuously opened upper end has been known. When embedding this U-shaped drain pipe in the soil so that the upper end is exposed, in order to prevent the drain pipe from rising due to earth pressure, at the appropriate intervals in the length direction of the drain pipe on the lower surface of the drain pipe. It was necessary to attach a lifting prevention member protruding from both sides of the drainage pipe. In addition, the upper end of the drain pipe is continuously open, and it is easily deformed by the earth pressure from the side. Especially, in order to prevent the upper end of the drain pipe from being deformed, the drain pipe is placed between both sides at the upper end of the drain pipe. It was necessary to attach the deformation preventing members at appropriate intervals in the length direction.

[0003]

However, in the above-mentioned conventional structure, there is a problem in that it takes time and effort to attach the rising prevention member and the deformation prevention member to the drain pipe, resulting in an increase in cost.

The present invention solves such a problem, and provides an inexpensive drainage pipe which can prevent the floating and the deformation by eliminating the conventional attachment of the floating and the deformation preventing members. The purpose is.

[0005]

In order to solve this problem, the present invention relates to a drainage pipe for burying in the ground made of a thermoplastic resin, which is formed into a tubular shape, and is formed on both sides of the drain pipe main body in the vertical direction. The outer surface is provided with a step portion having a continuous upper surface in the lengthwise direction, and further, the present invention is to provide a large number of small holes for water intake on the upper end surface of the drain pipe main body.

[0006]

With the above-described structure, the drain pipe main body is provided with the step portion having the upper surface continuous in the lengthwise direction on the both outer surfaces of the intermediate portion in the vertical direction. The step portion is provided on the upper surface of the step portion when the drain pipe is buried in the soil. Since the load of soil is applied, it is possible to prevent the drainage pipe from being lifted up due to the earth pressure from below without the need to attach a conventional lifting prevention member. Also, since the drain pipe body is formed into a tubular shape, the earth pressure resistance from the side is greater than that of the conventional drain pipe that has an open upper end, and the upper end of the drain pipe is Since it is not necessary to attach deformation preventing members between both side portions of the drain pipe at appropriate intervals in the length direction of the drain pipe, it is possible to prevent deformation of the drain pipe.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. First, the first embodiment shown in FIGS. 1 to 4 will be described. 1 is a drain pipe main body for underground burying, which is made of a thermoplastic resin such as polyethylene, polypropylene or vinyl chloride and is formed into a tubular shape. Drain pipe body 1
Has a substantially rectangular cross section, and step portions 3 having upper surfaces 2 continuous in the length direction are formed on both outer surfaces of the intermediate portion in the vertical direction. Then, both side surfaces of the drain pipe main body 1 located above the step portion 3 are oriented substantially vertically.

Denoted at 4 are reinforcing ridges formed on the outer peripheral surface of the drainage pipe main body 1, which are formed at appropriate intervals in the length direction, and are adjacent to each other on the upper end face of the drainage pipe main body 1. ,
A plurality of small holes 5 for taking in water are formed between the four. FIG. 2 shows the cross-sectional shape of the ridge portion 4, and the ridge portion 4 is recessed in the inner surface of the drain pipe body 1. Further, a large number of drain pipes are connected, and the connection is made by inserting the end portion 7 of the other drain pipe body 1 into the fitting port portion 6 of the end portion of the adjacent drain pipe body 1 as shown in FIG. Be done.

FIG. 4 shows a state in which the drainage pipe of the above construction is buried in the soil, and the drainage pipe main body 1 in which the small holes 5 are formed is buried so that the upper end surface thereof is substantially flush with the surface of the soil 8. Has been done. In this state, the load of the soil 8 is applied to the upper surface 2 of the step portion 3 of the drain pipe, so that the drain pipe can be prevented from rising due to earth pressure from below. Further, the drain pipe main body 1 is formed in a tubular shape with a rectangular cross section, and is provided with the plate portion 9 having the small hole 5 formed at the upper end thereof, so that it becomes strong against earth pressure from the side, The deformation of the drainage pipe can be prevented.

Next, a second embodiment shown in FIGS. 5 and 6 will be described. The drainage pipe in the second embodiment has basically the same configuration as the drainage pipe shown in the first embodiment,
The difference is that in the drainage pipe of the first embodiment, both side surfaces of the drainage pipe main body 1 located above the stepped portion 3 are oriented substantially in the vertical direction, whereas the drainage pipe of the second embodiment has a stepped portion 3. This is a point that both side surfaces of the drain pipe main body 1 located above are inclined outward. The other structure is the same as that of the first embodiment.

By the way, in the above-mentioned first and second embodiments, the reinforcing ridges 4 are provided on the outer peripheral surface of the drainage pipe body 1.
Is formed, and the ridge portion 4 is recessed on the inner surface of the drain pipe main body 1, but the inner surface of the drain pipe body 1 is not recessed at the ridge portion 4 as shown in FIG. It can also be formed in a flat state. Specifically, it is also possible to provide the ridge portion 4 having a hollow inside on the outer peripheral surface of the drain pipe main body 1 having a flat inner surface.

FIG. 8 shows an example of construction using the drainage pipe of the first or second embodiment described above. The drainage pipe 10 is arranged horizontally at the upper portion and the drainage pipe 11 is arranged horizontally at the lower portion. The drainage pipes 12 are connected to each other by slanting. In this case, the drainage pipes 10 at the upper part and the drainage pipes at the lower part 11 are perforated pipes each having a small hole 5 at the upper end as described above. , 11 is a non-perforated pipe having no small hole at its upper end. Reference numeral 13 is a connecting pipe connecting the upper drain pipe 10 and the inclined drain pipe 12, and 14 is a connecting pipe connecting the inclined drain pipe 12 and the lower drain pipe 11. With such a structure, rainwater and the like enter the drainage pipes 10 and 11 through the small holes 5 at the upper ends of the horizontal drainage pipes 10 and 11, and rainwater and the like that enter the upper drainage pipe 10 pass through the inclined drainage pipe 12. And flows into the drainage pipe 11 in the lower part and is drained.

[0013]

As described above, according to the present invention, the drain pipe main body is provided with the step portion having the upper surface continuous in the lengthwise direction on the both outer surfaces of the intermediate portion in the vertical direction, and the drain pipe is buried in the soil. In this state, the load of soil is applied to the upper surface of the stepped portion, and it is possible to prevent the drainage pipe from being lifted up by the earth pressure from below without the need to attach a lifting prevention member as in the conventional case. Also, since the drain pipe body is formed into a tubular shape, the earth pressure resistance from the side is greater than that of the conventional drain pipe that has an open upper end, and the upper end of the drain pipe is Since it is not necessary to attach deformation preventing members between both side portions of the drain pipe at appropriate intervals in the length direction of the drain pipe, it is possible to prevent deformation of the drain pipe. Thereby, an inexpensive drainage pipe can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a drainage pipe according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the drainage pipe.

FIG. 3 is a plan view showing a state when the drain pipe is connected.

FIG. 4 is a perspective view showing a state in which the drainage pipe is buried in the soil.

FIG. 5 is a perspective view of a drainage pipe according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing a state in which the drain pipe is buried in the soil.

FIG. 7 is an enlarged sectional view of a main part of a drainage pipe according to another embodiment.

FIG. 8 is a schematic view showing a construction example using the drainage pipe of the present invention.

[Explanation of symbols]

 1 Drain pipe main body 2 Upper surface 3 Step part 4 Convex ridge part 5 Small hole 9 Plate part 10 Drain pipe 11 Drain pipe 12 Drain pipe

Claims (2)

[Claims] 1. A drainage pipe for burying in soil, which is made of a thermoplastic resin, and is formed into a tubular shape, and is provided with a step portion having an upper surface continuous in the longitudinal direction on both outer surfaces of the drain pipe main body in the vertical direction. A drainage pipe characterized by being formed. 2. The drainage pipe according to claim 1, wherein a large number of small holes for taking in water are provided on the upper end surface of the drainage pipe main body.