JPH09242165A - Repair method of manhole and repair article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely perform damming of a pipe passage for drying-up, setting of a detour and invert execution in repair work of a manhole. SOLUTION: A balloon 9 having a penetration hole of a detour pipe 7 is fitted to the inside of a sewage inlet 4 and a sewage outlet 5 of a manhole 1, the detour pipe 7 is inserted over both the penetration holes, and fluid is injected into the balloon 9. The balloon 9 is adhered to the inner faces of the inlet 4 and the outlet 5 to simply and surely perform sewage damming. The detour pipe is provided in the manhole 1 to ease drying-up, an invert form material which is axially collapsible or can be assembled and disassembled is provided between the inlet 4 and the outlet 5 to perform invert execution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a dam in a pipeline and a bypass for sewerage in order to dry the manhole in a repair work for forming an invert in the manhole, and a construction tool therefor. And an invert forming material provided at the bottom of the manhole.

[0002]

2. Description of the Related Art Sewers are provided with manholes at regular intervals to maintain and manage them.The bottom of conventional manholes is filled with sediment that has flowed into the sewer pipeline along with rainwater to the downstream side. There was a mud reservoir to prevent it,
With the progress of peripheral technology, it is no longer necessary to provide the mud reservoir, and because of the mud reservoir, it is necessary to raise the mud periodically, resulting in extra management costs, and its repair is desired. .

[0003]

As an example of the repair of the above manhole, it is recommended to backfill the mud reservoir to provide an invert (ditch bottom groove) between the sewage inlet and outlet. It's been a while since the repair work started,
There are currently no construction supplies for that purpose, and in order to carry out renovation work in the manhole, it is necessary to dry the manhole, and therefore sandbags are piled on the sewage inlet and outlet sides. There was a problem that we had to stop the dam and connect between them with an underwater pump.

In view of the above problems, the present invention provides a method of reliably and easily installing a dam for a water line for drying water in a manhole and a bypass waterway, a construction tool therefor, and an invert forming material. It is an issue.

[0005]

In order to solve the above-mentioned problems, a first invention is to install a balloon having a through hole of a bypass pipe inside the sewage inlet and the outlet of a manhole, and to arrange the both through holes. The bypass pipe is pierced through all over, the fluid is injected into the balloon, the inner surfaces of the inlet and the outlet and the bypass pipe are brought into close contact with each other to form a dam, and a bypass pipe line is provided in the manhole. It is a thing.

In the present invention configured as described above,
Since the sewage inlet and the outlet of the manhole are blocked by the balloon and the space between them is connected by the bypass pipe, the manhole can be easily and surely dried to form a bypass route.

A second aspect of the present invention comprises a cylindrical balloon having a through hole for a bypass pipe in the axial direction, a pressing plate for pressing both end surfaces of the cylindrical balloon, and a bypass pipe penetrating the through hole. The following configuration is adopted.

In the present invention having the above-mentioned structure,
Load balloons into the sewage inlet and outlet of the manhole,
A detour pipe was passed through the through hole of the balloon, and a dam and a detour were formed simply by injecting a fluid into the balloon, which enabled water to be dried in the manhole without the need for sandbag work.

A third aspect of the present invention uses a semi-cylindrical tube as an invert forming material provided between a sewage inlet and an outlet of a manhole, and divides the semi-cylindrical tube into a plurality of pieces along the radial direction. However, it is an invert forming material that can be folded or disassembled and assembled.

In the present invention configured as described above,
Since the invert forming material can be folded axially, or disassembled / assembled, even a so-called large manhole with an inner diameter larger than the manhole opening diameter can be easily carried into the manhole. The invert forming material can be unfolded or assembled to perform invert construction.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings.

As shown, there is a mud reservoir 2 at the bottom of a manhole 1, and an inlet 4 and an outlet 5 of a sewer pipe 3 are opened immediately above the mud reservoir 2. When the mud reservoir 2 of the manhole 1 is backfilled and the invert 6 is laid in the portion, it is necessary to dry the manhole 1 first.

Then, a balloon 9 having a through hole 8 for the bypass pipe 7 in the inside of the inflow port 4 and the outflow port 5 and having an outer diameter substantially the same as the inner diameter of the inflow port 4 and the outflow port 5 is provided from both sides of the pressing plate. Apply 10 and load. When the pressing plate 10 has a large diameter, it is divided into a size that can be carried in through the opening 11 of the manhole 1.

When the above preparation is completed, air is injected into the balloon 9. Since the balloon 9 infused with air is sandwiched by the pressing plates 10 from both sides, the sewer pipe 3 and the bypass pipe 7 are
Bulges only in the direction of, and the inflow port 4 and the outflow port 5 are sealed, and the detour pipe 7 connects between them to form a detour pipe line. In addition,
When there is a branch pipe 12 in the manhole 1, the receiving port 13 of the branch pipe 12 is opened in the bypass pipe 7 so that the branch pipe 12 is connected to the bypass pipe 12. The space between the branch pipe 12 and the pipe 14 is sealed with a balloon 9.

When the inflow port 4 and the outflow port 5 are sealed and the bypass pipe 7 is set, the dirt and debris accumulated in the mud reservoir 2 is cleaned with a vacuum truck and the manhole 1 is dried.

Next, the stage 15 for invert forming work is assembled in the manhole 1. This stage 15
As shown in FIGS. 4 (A) and 4 (B), the pair of arcuate stays 16 and 16 are connected by a plurality of turnbuckles 17, and the turnbuckle 17 is extended to the outer surface of the arcuate stays 16 and 16. Attach the sharpened stud 18 to the foramen wall 1
It has a structure in which the scaffolding plate 19 is placed on the turnbuckle 17 which is tensioned and fixed to the inner surface of a to be assembled.

When the manhole 1 (mud reservoir 2) has been dried in water, the invert 6 is constructed. A foldable or decomposable invert forming material 20 is carried in through the opening 11 of the manhole 1, and the invert forming material 20 is unfolded or assembled and passed over between the inflow port 4 and the outflow port 5 of the sewer pipe 3, and the mud reservoir 2
The invert 6 is completed when the mortar is struck and the approach 21 is provided to remove the forming material 20 after the mortar is solidified. Invert forming material 20 used here
Hinges the dividing members 22a, 22b, 22c, 22b to the hinge 2
It is connected by 3 and is foldable.

[0018]

As described above, according to the present invention,
The sewage inlet and outlet in the manhole can be easily and surely dammed, and at the same time, a detour can be formed to ensure that the manhole is properly dried. It will be possible to significantly reduce the number of man-hours and costs for invert construction to refill the reservoir.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment according to the present invention.

FIG. 2 is an enlarged view of the main part.

[Fig. 3] Cross section of the same invert construction

4A is a cross-sectional plan view of the stage, and FIG. 4B is a vertical cross-sectional view of the same.

FIG. 5: Front view of invert forming material

[Explanation of symbols]

 1 Manhole 2 Mud reservoir 3 Sewer pipe 4 Inlet 5 Outlet 6 Invert 7 Detour 8 Through hole 9 Balloon 10 Pressing plate

Claims (3)

[Claims] 1. A balloon having a through hole of a bypass pipe is fitted on the inner surfaces of the sewage inlet and the outlet of a manhole, the bypass pipe is passed through the both through holes, and a fluid is injected into the balloon. A method for repairing a manhole, characterized by providing a dam by closely adhering to the inner surfaces of the inlet and outlet and the bypass pipe and providing a bypass pipe in the manhole. 2. A repair work in a manhole consisting of a cylindrical balloon provided with a through hole for a bypass pipe in an axial direction, a pressing plate for pressing both end faces of the cylindrical balloon, and a bypass pipe penetrating the through hole. Supplies. 3. A semi-cylindrical tube is used as an invert forming material provided between a sewage inlet and an outlet of a manhole, and the semi-cylindrical tube is divided into a plurality of pieces along the radial direction and is folded. Or, an invert forming material that can be disassembled and assembled.