JPH04180870A - Repairing of inside surface lining of gunite tube - Google Patents

Abstract

PURPOSE:To simplify excavation works and achieve simplification and high efficency in the execution of works to a great extent by confirming completion of a lining within a gunite tube when stream of a resin ascends within a service tee and runs out of a terminal tee into a confirmation tube. CONSTITUTION:A branched part of a conduit pipe 1 is excavated to expose a service tee for joint with a gunite tube 2. A communicating opening between the inside of the service tee and the conduit pipe 1 is closed with a stopper 10 and on the head of the service tee 6, a terminal tee 11 is provided for communication with each other by the medium of a plug opening 6a. Then, a resin arrival confirmation tube 12, transparent to show the inside, is fixed sideways with the terminal tee. Thereafter, upon its arrival at the terminal of the gunite tube 2, stream of a resin ascends within the service tee 6, running from the terminal tee 11 into the confirmation tube 12, and it is confirmed with this run-off state that the lining to the gunite tube 2 is completed. After confirmation is over, the terminal tee 11 is removed while the stopper 10 is taken away to reopen the communicating opening to the conduit pipe 1. At the same time, the plug opening of the service tee 6 is closed, followed by the works to fill the excavation hole.

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a service pipe that is branched from a gas pipe such as a main pipe or a branch pipe buried under a road and led into a residential area of a consumer. In contrast, the present invention relates to a method for repairing the inner lining of a service pipe by forming a resin lining coating on the inner surface of the pipe.

[Conventional technology]

As a rehabilitation and repair method for buried pipes, a repair method in which epoxy resin is conveyed into the pipe by a low-pressure high-speed air flow to form a lining film on the inner surface of the pipe is disclosed, for example, in Japanese Patent Publication No. 61-24067 by the present applicant. Prior art techniques described in publications and the like have been proposed.

When this prior art is employed to repair the inner lining of a service pipe branched from the above-mentioned conduit, the fourth
As shown in the figure, the meter is removed from the meter standpipe 3 at the end of the service pipe 2 branched from the conduit 1 to provide an above-ground opening, and a blower 4. A method is adopted in which the automatic resin mixing and injection machines 5 are connected to each other, and the resin is conveyed into the pipe by airflow from the meter standpipe 3, and the entire length of the service pipe 2 leading to the conduit 1 is lined from one direction. .

In this case, in the conventional construction method, lining construction is carried out on the service pipe 2.
As a method of confirming that the pipe is reliably constructed over the entire length of the pipe up to the branch end, the branch part of the pipe 1 is excavated as shown in Fig. 4, and the branch part is exposed in the excavated hole.
By cutting the connection between the service tee 6 attached to the branch and the service pipe 2, it is possible to confirm that the resin has definitely reached the branch end of the service pipe 2. The resin that has reached the cutting opening 2a of the transparent hose 8
The resin can be collected into the resin receiver 7 via the resin container 7.

[Problems to be Solved by the Invention] In the conventional construction method described above, the connection between the service pipe 6 attached to the branch part of the conduit 1 and the service pipe 2 is disconnected. In order to enter the excavated hole a and perform the above-mentioned cutting work and pipe connection work after repair, the excavated hole must be excavated over a wide area large enough for a person to fit, making the excavation work difficult.

(2) Further, after the lining construction is completed, pipe connection work is required again, which requires time for the pipe tying material and connection work, and is extremely difficult.

The present invention was proposed in response to the above-mentioned problems, and has been improved so that the excavation hole can be formed with a relatively small hole, and the construction work can be made more efficient by eliminating the need for pipe-tying materials. The purpose is to provide a method for repairing the inner lining of service pipes.

[Means to solve the problem]

In order to achieve this objective, the present invention is directed to a service pipe that is branched from a pipe buried under a road and led into a consumer's residential area, from the meter stand pipe side at the end to the branch side of the pipe. When lining is carried out by conveying the resin by air flow, the branch part of the conduit is excavated to expose the service channel for connection with the service pipe, and the communication hole between the inside of the service channel and the conduit is closed with a stopper. and connect terminal chips that communicate with each other through plug holes to the upper part of the service chip,
A transparent resin arrival confirmation tube that allows the interior to be seen through is attached sideways to the terminal tee, and when the resin flow reaches the end of the service tube, the resin flow rises within the service channel and confirms the above from the terminal tee. After confirming that the lining of the service pipe has been completed, remove the terminal tee and remove the stopper to open the communication hole with the pipe, and at the same time, remove the service tee. The construction is characterized by plugging the plug hole and backfilling the excavated hole.

[For production]

In this method of repairing the inner lining of service pipes, the resin flow that is conveyed from the meter standpipe side to the branch side of the conduit rises in the service channel from the end of the service pipe and flows out from the terminal channel into the confirmation pipe. Since the completion of lining of the service pipe can be confirmed by this, there is no need to disconnect the connection between the service channel and the service pipe at the branch part of the conduit for confirmation.

Therefore, the excavation hole for exposing the branch part of the conduit above the ground can be a small hole, and the excavation area can be reduced, which simplifies the excavation work.

In addition, there is no need to cut service pipes or connect new connecting pipes after repairs, making construction work much easier and more efficient, and increasing the number of construction jobs per day. Become.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a schematic explanatory diagram showing a method for repairing the inner lining of a service pipe according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view showing the main part of FIG. The same parts corresponding to those in FIG. 4) will be described with the same reference numerals.

First, the existing pipeline to which the repair method of the present invention is applied is a service pipe that is led into the residential area of the customer through a service channel 6 from a pipeline 1 called a main pipe or branch pipe buried under the road. 2 is branched, and a meter standpipe 3 is erected toward the ground at the end of the service pipe 2.

When carrying out repair work, the branch portion of the conduit l from which the service pipe 2 is branched is excavated to expose the service tee 6 in the excavated hole a.

The service tee 6 has a plug hole 6a in its upper part which is usually closed with a plug, and a stopper 10 is inserted into the service tee 6 from the opening of the plug hole 6a, and the stopper 10 allows the service The communication hole between the inside of the chi 6 and the conduit 1 is closed to prevent the resin and the pressurized air for the resin from flowing into the conduit 1.

Further, a terminal chip 11 is screwed to the upper part of the service chip 6 and is connected to the inside via the plug hole 6a. Several arrival confirmation tubes 12 are extended sideways so that the resin airflow that has reached the end of the service tube 2 rises within the service channel 6 and flows out from the terminal channel 11 into the confirmation tube 12. . This resin arrival confirmation tube 12 has an inner diameter slightly larger than the inner diameter of the supply tube 2, and the tip opening of the arrival confirmation tube 12 is connected to the resin receiver 7 via the hose 8.
It is connected to the.

In the above-mentioned state, an above-ground opening is provided in the meter standpipe 3 at the end of the service pipe 2 by means of a meter removed from the standpipe 3, and a blower 4. The resin automatic mixing and injection machine 5 is connected.

The lining resin supplied from the automatic resin mixing and injection machine 5 is a two-component curing resin at room temperature, which is a mixture of a main resin and a curing agent, but an appropriate amount of thixotropic agent is added to impart thixotropic properties. is desirable. In addition, a required amount of lining resin necessary to line the entire length of the service pipe 2 is injected into the automatic resin mixing and injection machine 5. It is carried by the air flow from the meter standpipe 3 to the service pipe 2-
The inside of the pipe is conveyed toward the branching part of the conduit l, thereby lining the entire length of the service pipe 2 from one direction.

This lining resin forms a lining coating film 13 of a required thickness on the inner surface of the tube due to its adhesion force to the wall surface as it flows while contacting the inner surface of the tube.

When the resin airflow reaches the branch end of the supply pipe 2, it sequentially ascends inside the service channel 6 from that end, and goes up into the terminal channel 6.
1 and flows into the transparent resin arrival confirmation tube 12.

According to experiments, when the resin air flow is attached to the entire inner circumference of the resin arrival confirmation tube 12, even though the inside of the supply tube 2 is connected to the service channel 6 and the inside of the tube cannot be visually observed. , the lining coating 13 extends to the branch end of the service pipe 2.
It is confirmed that the pipe is completely formed, and by this confirmation, it can be detected that the entire internal length of the service pipe 2 has been reliably lined. Note that the resin airflow flowing out into the resin arrival confirmation pipe 12 described above is collected into the resin receiver 7 via the hose 8.

After the above confirmation, the resin supply from the automatic resin mixing and injection machine 5 is stopped, and only air is passed through the pipe for a certain period of time to harden the lining coating film formed on the inner surface of the pipe.

After the repair of the inner lining of the service pipe 2 is completed, the terminal cheek 11 is removed from the service pipe 6, and the stopper IO is removed from the opening of the plug hole 6a by an appropriate means to remove the inside of the service pipe 6. At the same time as the communicating hole with the conduit is opened, the plug hole 6a is plugged with an embolus 14 as shown in FIG. 3, and in this state, the excavated hole a is backfilled to complete the repair work.

〔Effect of the invention〕

As explained above, in the service pipe inner lining repair method according to the present invention, the resin airflow flowing from the meter standpipe 8 side to the branch side of the conduit l is transferred from the terminal end of the service pipe 2 into the service channel 6. Since it is possible to confirm the completion of lining of the service pipe by rising and flowing out from the terminal pipe 6 into the confirmation pipe 12, in order to confirm this, as in the conventional construction method, the service pipe 6 and the service pipe at the branch part of the pipe 1 are As a result of eliminating the need to cut and open the connecting part with the pipe 2, the excavated hole a for exposing the branch part of the conduit l above the ground can be a small hole, which simplifies the excavation work because the excavation area is reduced. can be converted into

In addition, the trouble of cutting the service pipe 2 and the work of tying a new connecting pipe after repair are no longer necessary, making the construction work much easier and more efficient, and increasing the number of construction projects per day. The effect of this can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a repair method for the inner lining of a service pipe according to an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view showing the main part of Fig. 1, and Fig. 3 is a view after the repair work is completed. The sectional view of the main parts shown in FIG. 4 is a schematic explanatory view showing the conventional construction method. ■... Conduit, 2... Service pipe, 8... Meter standpipe,
4...Blower, 5...Resin automatic mixing and injection machine, 6...
・Service tee, 6a... Plug hole, 7... Resin receiver, 8... Hose, lO... Stopper, 11. Terminal tee, 12... Resin arrival confirmation tube, 13... Lining Coating film, 14... Embolism.

Claims (1)

[Scope of Claims] For a service pipe that is branched from a pipe buried under a road and led into a consumer's residential area, resin is applied by air flow from the meter vertical pipe side at the end to the branch side of the pipe. When transporting and lining the pipe, the branch part of the pipe is excavated to expose the service pipe for connection with the service pipe, and the communication hole between the inside of the service pipe and the pipe is closed with a stopper, and the upper part of the service pipe is , connect the terminal Qi that communicate with each other through the plug hole,
A transparent resin arrival confirmation tube that allows the interior to be seen through is attached sideways to the terminal tee, and when the resin flow reaches the end of the service tube, the resin flow rises within the service channel and confirms the above from the terminal tee. After confirming that the lining of the service pipe has been completed, remove the terminal tee and remove the stopper to open the communication hole with the pipe, and at the same time, remove the service tee. A method for repairing the inner lining of service pipes, which is characterized by plugging the plug holes and backfilling the excavated holes.