JP2000073438A - Burying method for sewer pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burying method for sewer pipe capable of spreading comparatively coarse gravel such as crushed stones, etc., to form a foundation of a burying trench for laying branch pipes and, at the same time, preventing the occurrence of cracks or breaks in the branch pipes even if earth pressure or wheel load acts on the surfaces of the branch pipes. SOLUTION: The bottom of an execavated trench A is leveled off, comparatively coarse gravel such as crushed stones, etc., is spread to form a foundation, and then, mains 1 of a rib pipe is laid out. Then, in the case a branch saddle joint 2 is connected to a side wall of the mains 1 to connect branch pipes 3 of the rib pipe to the branch saddle joint 2, comparatively coarse gravel such as crushed stones, etc., is spread on the bottom of the excavated trench B for laying the branch pipes 3 to form the foundation, and after the branch pipes 3 of the rib pipe are laid out, they ared backfilled with earth and sand, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of burying a sewer pipe using a synthetic resin rib pipe in which annular ribs are provided at predetermined intervals in the pipe axial direction on the outer peripheral surface of the pipe.

[0002]

2. Description of the Related Art Conventionally, sewer pipes are buried as follows. That is, as shown in the sectional view of FIG. 3, the bottom of the excavation groove A formed by excavating the ground is leveled, and quarries, chestnut stones, gravel, etc. are spread to form a foundation,
The main pipe 1 is laid. Therefore, as shown in FIG. 4, a branch saddle joint 5 is connected to the side wall of the main pipe 1, a branch pipe 6 is connected to the branch saddle joint 5 via a bent pipe 6a, and the branch pipe 6 is laid. Sand was spread on the bottom of the excavation groove B to form a foundation.

In this buried pipe, a synthetic resin rib pipe in which annular ribs 11 are provided at predetermined intervals in the pipe axial direction on the outer peripheral surface of the pipe is used for the main pipe 1, and the bent pipe 6 a and the branch pipe 6 are used for the bent pipe 6 a and the branch pipe 6. An ordinary synthetic resin tube having no annular rib has been used.

[0004]

However, in recent years, there is a shortage of fine sand such as sea sand and river sand, which makes it impossible to spread fine sand on the bottom of the excavation groove B where the branch pipe 6 is laid. ing. Therefore, instead of this sand, quarries, rubble stones, gravel, etc. are used, but when these relatively coarse stones are spread, when earth pressure or wheel load acts on the upper surface of the synthetic resin pipe There was a risk that the corners of the stone would hit the pipe surface, causing cracks or breakage.

The present invention has been made to solve the above-mentioned problem, and it is possible to form a foundation of a buried groove by laying relatively coarse stones such as quarries and the like, and earth pressure and a wheel load act on an upper surface of a branch pipe. It is intended to provide a method of burying a sewer pipe without causing cracks or breakage in the branch pipe.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of burying a sewer pipe by using a synthetic resin rib pipe in which annular ribs are provided at predetermined intervals in the pipe axial direction on the outer peripheral surface of the pipe. Leveling the ground, laying relatively coarse stones such as quarries to form a foundation, laying the main pipe of the rib pipe, and then connecting a branch saddle joint to the side wall of the main pipe and connecting it to the branch saddle joint When connecting the branch pipe of the rib pipe,
The method is characterized in that relatively coarse stones such as quarries are laid at the bottom of the excavation groove for laying a branch pipe to form a foundation, and then a branch pipe of a rib pipe is laid to backfill soil and the like.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway sectional view of an embodiment showing a buried state of a sewer pipe according to the present invention, and FIG. 2 is a partially cutaway sectional view showing a connected state of a main pipe and a branch pipe. An excavation groove formed by excavating the ground, 1 is a main pipe, 2 is a branch saddle joint, and 3 is a branch pipe.

The main pipe 1 and the branch pipe 3 are rib pipes in which annular ribs 11 and 31 are provided at predetermined intervals in the pipe axis direction on the outer peripheral surface of a pipe made of vinyl chloride resin or the like. A buried pipe is formed by using a synthetic resin rib pipe for the first pipe 1 and the branch pipe 3. When laying the main pipe 1 in the excavation groove A, the bottom of the excavation groove A is leveled, and relatively coarse stones such as quarries, chestnut stones, and gravel are laid to form a foundation. Lay it on top and connect sequentially.

Similarly, the bottom of the excavation groove B in which the branch pipe 3 is laid is leveled, and relatively coarse stones such as quarries, stones and gravel are laid to form a foundation. Then, the branch saddle joint 2 is connected to the side wall of the main pipe 1, the branch pipe 3 is sequentially connected to the branch saddle joint 2 via the bent pipe 3a, and the other end is connected to a manhole or the like. In this way, the earth and sand excavated after laying the main pipe 1 and the branch pipe 3 are put into the excavation grooves A and B and backfilled.

[0010] Since an annular rib is provided on the outer peripheral surface of the rib pipe used for the main pipe 1 and the branch pipe 3, flattening of the pipe is effectively prevented. For this reason, even if earth pressure or wheel load acts on the upper surface of the pipe after buried piping, cracks may occur,
No damage. When the main pipe 1 and the branch pipe 3 are placed on a foundation on which quarries and the like are spread, annular ribs provided at predetermined intervals on the outer peripheral surface of the pipe come into contact with quarries and the like to support a load from above. . For this reason, even if earth pressure or a wheel load acts on the upper surface of the pipe after the buried pipe, a corner such as quarry does not hit the pipe surface to cause cracks or breakage.

[0011]

As described above in detail, in the present invention, the buried piping is performed by using a synthetic resin rib pipe having annular ribs provided on the outer peripheral surface of the pipe at predetermined intervals in the pipe axis direction.
Annular ribs provided at predetermined intervals on the outer peripheral surface of the pipe prevent the pipe from being flattened. Further, since external force such as earth pressure or wheel load is supported by the annular rib, cracks or breakage due to corners of quarry or the like hitting the pipe surface are prevented. recent years,
The lack of fine sand, such as sea sand and river sand, has hindered the burial of pipes.However, according to the burial method of the present invention, quarries and the like that can be easily obtained anywhere can be used. In addition, the construction period of burial work can be shortened.

[Brief description of the drawings]

FIG. 1 is a partially cut-away sectional view of an embodiment of the present invention, showing a state where a sewer pipe is buried.

FIG. 2 is a partially sectional view showing a connection state between a main pipe and a bent pipe.

FIG. 3 is a partially cut-away sectional view of a conventional example showing a buried state of a sewer pipe.

FIG. 4 is a partial cross-sectional view of a conventional example showing a connection state between a main pipe and a bent pipe.

[Explanation of symbols]

 A, B Drilling groove 1 Main pipe 2 Branch saddle joint 3 Branch pipe 4 Manhole

Claims (1)

[Claims] 1. A method of burying a sewer pipe by means of a synthetic resin rib pipe having annular ribs provided on a pipe outer peripheral surface at predetermined intervals in a pipe axial direction, wherein the bottom of a digging groove is leveled and quarrying is performed. After laying the relatively coarse stones to form the foundation, laying the main pipe of the rib pipe, then connecting the branch saddle joint to the side wall of the main pipe and connecting the branch pipe of the rib pipe to the branch saddle joint A sewer pipe characterized by laying relatively coarse stones such as quarries at the bottom of a digging trench for laying a branch pipe to form a foundation, and then laying a branch pipe of a rib pipe to backfill soil and the like. Burial method.