JPH06306922A - Connection of pipeline in manhole and its pipe - Google Patents

Abstract

PURPOSE:To prevent pipelines from breaking due to the bending moment and the shearing force at the joint part and the nearby part thereof of a buried manhole 1 and a pipe line 8. CONSTITUTION:The end of a short pipe 3 is inserted in a pierced hole 2 for joint bored on a manhole buried in the ground and a caulking 4 material is set between the inner periphery of pierced hole 2 and the outer periphery of short pipe 3 to connect the short pipe 3 to the manhole 1. And a buried pipe 6 is flexibly jointed 7 to the front end of the short pipe 3 to form a pipeline 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining buried manhole pipes and a manhole pipe.

[0002]

2. Description of the Related Art Conventionally, a connecting through hole is formed on the bottom side surface of an underground buried manhole, a long buried pipe is inserted into the through hole, and a rubber caulking is fitted on the outer circumference of the inserting section to form a through hole with the outer circumference. The manhole and the buried pipe were connected to each other in a slightly flexible state by performing mortar coking between the inner periphery and the inner periphery (Figs. 4, 5, and 6).

The above-mentioned rubber caulking is flexible and has an effect of receiving the subsidence of the buried pipe due to earth pressure. It is difficult to absorb the fall of
There is a problem that bending moment and shearing force act in the vicinity of the buried pipe and manhole, and cracks occur in that part, and rubber coking is applied to the joint between the cylindrical manhole and the circular pipe conduit. It required skill and labor and was not easy.

That is, if the buried pipe is joined to the manhole by mortar coking in a state where the manhole is stable after building and then backfilled on the buried pipe (pipe), a large bending moment and shear load due to earth pressure are applied to the joint. .

Alternatively, a manhole may be installed and mortar coking may be performed after the construction order is reversed and the pipeline is backfilled and the pipeline is stabilized. However, in any case, if unequal settlement occurs between the pipe and the manhole, bending moment or shear force concentrates at the most recent part (proximity part) of the joint,
The principle of "lever" was broken in the narrow pipe.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent breakage of a pipeline due to a bending moment or shearing force near a joint between a buried manhole and the pipeline.

[0007]

In order to achieve the above object, the present invention inserts a proximal end portion of a short pipe into a connecting through hole formed in a manhole buried underground to form an inner circumference of the through hole. Coking with the outer circumference of the short pipe to join the short pipe to the manhole,
Pipe connecting method for manhole, characterized in that a pipe is formed by connecting a buried pipe to the tip of the short pipe in a flexible state. The pipe connecting method for manhole according to the invention, wherein the manhole is cylindrical. Insert the proximal end of the short pipe into the joining through hole formed in the manhole to be embedded, and perform caulking between the inner periphery of the through hole and the outer periphery of the short pipe to join the short pipe to the manhole. ,
A pipe line for a manhole, characterized in that an embedded pipe is flexibly connected to a tip portion of the short pipe to form a pipe line. The pipe line for a manhole according to the third aspect of the present invention has a cylindrical manhole. .

[0008]

In the present invention, the base end portion of the short pipe 3 is inserted into the through holes 2 and 2 for joining the underground buried manhole 1 and caulking 4 is performed to join the short pipe 3 and the manhole 1 in a rigid or flexible state. Since the buried pipe 6 is flexibly connected 7 to the tip of the short pipe 3, the bending moment and the shearing force due to the earth pressure load p applied to the buried pipe 6 are different from those of the short pipe 3 and the buried pipe. It is absorbed in a flexible state at the connecting portion 7 with the pipe 6, and the crack c is not generated in the portion of the buried pipe 6 near the manhole 1 side.

[0009]

EXAMPLE A bottom plate 9 of an assembled circular manhole 1 which is buried underground is stabilized on a foundation 10, and a plurality of through holes 2 and 2 for joining are formed in steps on the bottom arc-shaped side surface of the manhole 1, As shown in FIGS. 1 and 2, the proximal ends of the short tubes 3 and 3 are inserted into the through holes 2 and 2.

Between the outer circumference of the rubber caulking 4'wound around the outer circumferences of the short pipes 3 and 3 along the upright arc surface and the inner circumference of the through hole 2, mortar caulking 4 is applied along the upright arc surface and slightly. Sealed joint in a flexible state, but mortar caulking 4
The rigid hermetic joint 5 may be performed only by using the rigid seal joint 5.

In this state, the connecting portion 7 of the long buried pipe 6 is fitted to the outer periphery of the tip end portions of the short pipes 3 and 3 through the rubber O-ring 11 to be connected in a flexible state, and the pipes are buried in this state. To form the conduit 8. As shown in FIGS. 3 (a) and 3 (b), the connecting portion 7 may be an abutting connection with male / female fittings 6 ', 6 "or a T-shaped connecting ring 12. In FIG.
Reference numeral 3 indicates the surface of the earth, 14 is a manhole cover, 15 is a cover frame, and 16 is a ladder.

[0012]

Since the present invention is constructed as described above, the buried manhole 1 and the pipeline 8 thereof are stable in the ground, and there is no risk of damaging the pipeline 8 close to the manhole 1, and the buried manhole is safe. 1 and its conduit 8 are obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a conduit of a manhole according to the present invention.

FIG. 2 is a partial perspective view of FIG.

FIG. 3 (a) is an enlarged vertical sectional view of a male and female connecting portion.
(B) The figure is an enlarged vertical cross-sectional view of the connecting portion formed by the T-shaped connecting ring.

FIG. 4 is a cutaway side view of a conventional joint portion.

FIG. 5 is a plan view of FIG.

FIG. 6 is a side view of a conventional manhole and conduit.

[Explanation of symbols]

 1 Manhole 2 Through hole for joining 3 Short pipe 4 Caulking 5 Joining part 6 Buried pipe 7 Connecting part 8 Pipeline

Claims (4)

[Claims] 1. A short end is inserted by inserting a base end portion of the short pipe into a connecting through hole formed in a manhole buried underground and caulking between the inner periphery of the through hole and the outer periphery of the short pipe. A pipe joining method for a manhole, characterized in that a pipe is joined to the manhole and an embedded pipe is flexibly connected to a tip portion of the short pipe to form a pipe. 2. The pipe joining method for a manhole according to claim 1, wherein the manhole is cylindrical. 3. The short end is inserted by inserting a base end portion of the short pipe into a connecting through hole formed in a manhole buried underground and caulking between the inner periphery of the through hole and the outer periphery of the short pipe. A pipe line for a manhole, wherein a pipe is joined to the manhole, and a buried pipe is flexibly connected to a tip portion of the short pipe to form a pipe line. 4. The manhole conduit according to claim 3, wherein the manhole is cylindrical.