JPH06293071A - Pipeline regenerating and repairing method - Google Patents

Abstract

PURPOSE:To enhance the efficiency of a series of construction works by a method wherein lining work is applied to a main pipe in a ground embedded state and a through-hole is provided to the main pipe at the place corresponding to a branch pipe by a drilling device and, after one end of the main pipe is brought to a live wire state, the sealing work of the periphery of the through-hole is performed at every branch pipe by the excavating work of the embedding part of the branch pipe. CONSTITUTION:Both end parts of a regenerable and repairable part are partially cut and removed and, next, a plastic tube 7 is provided in the regenerable and repairable part so as to extend over the total length thereof and expanded to be fitted to the inner peripheral surface of a main pipe 1 to regenerate the main pipe 1 and through-holes 7a for allowing branch pipes 2 to be opened are provided to the places corresponding to the branch pipes of the plastic tube 7 by a drilling device 9 over the total length of the regenerable and repairable part. Thereafter, the pipeline containing all of the branch pipes is brought to an one end live wire state and the excavating work digging up the embedded parts of the branch pipes 2 to form excavated holes for sealing work and the sealing work sealing the peripheries of the branch pipes 7a by utilizing the excavated holes are performed at every branch pipes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline rehabilitation repair method, and more specifically, to an existing pipeline with a branch portion in which branch pipes are connected to a plurality of main pipes in a communicating state.
After inserting a plastic tube into the main pipe and fitting the plastic tube to the inner peripheral surface of the main pipe, after lining the inner peripheral surface to rehabilitate the main pipe, The present invention relates to a pipeline rehabilitation repair method in which a through hole for opening a branch passage is formed at a location corresponding to a branch portion in a plastic tube, and a sealing work is performed around the through hole.

[0002]

2. Description of the Related Art Conventionally, as the pipe rehabilitation repair method,
When performing the lining work on the inner peripheral surface of the main pipe, in parallel with the lining work, the excavation work of the buried portion of the branch pipe and the sealing work around the through hole were performed.

[0003]

In such a conventional method, since the excavation work and the seal work are performed in parallel with the lining work, a constant continuous work period (for example, when night work is not performed, , The daytime continuous construction period) has elapsed, the lining construction is terminated and the excavation construction is completed in order to restart the supply of the fluid to be transported, which is transported via the conduit with the branch section. It is necessary to finish the work of refilling the excavation site to its original condition and the sealing work. Therefore,
There is a condition that all the works must be completed within the construction period, and the pipe length that can be constructed within the construction period is, for example, about 20 m / day in order to satisfy the condition. You will be limited. Then, if the pipeline length that can be constructed during the construction period is restricted so as to satisfy the above condition, the pipeline rehabilitation repair work will be constructed at an appropriate time after the construction period (for example, the next morning). When resuming, the excavation work and the seal work have not been performed at the planned construction site, and the lining work has not been performed at all. Therefore, at the planned construction site, the excavation work, the sealing work, and the lining work must be carried out from the beginning in the same procedure as the past work already done (for example, the daytime work on the previous day). There was a problem that it was inefficient. The present invention has been made by paying attention to such an actual situation, and it is possible to improve the efficiency of the series of works by extending the pipeline length that can be constructed in a constant continuous construction period more than ever before. The purpose is to provide the means that can.

[0004]

A pipeline rehabilitation repair method (hereinafter referred to as the method of the present invention) according to the present invention has an existing branch portion in which a plurality of branch pipes are connected in communication with each other. By inserting a plastic tube into the main pipe, and fitting the plastic tube to the inner peripheral surface of the main pipe, the inner peripheral surface is lined to rehabilitate the main pipe. In addition, a pipe rehabilitation repair method for performing a sealing work around the through hole after forming a through hole for opening the branch passage at a location corresponding to the branch portion in the plastic tube, In the state of being buried in the ground, after performing the lining work so as to integrally cover a plurality of branch portions, insert a perforating device into the branch pipe or the main pipe, and a plurality of branch portions in the plastic tube. After piercing the through-holes in each of the corresponding portions, temporarily setting the pipeline including all of the plurality of branch portions to the active pipe state, excavating the buried portion of the branch pipe and sealing the periphery of the through-hole. It is characterized in that and are performed for each individual branch portion.

[0005]

According to the method of the present invention as described above, the lining work is carried out so as to integrally cover a plurality of branch portions during a constant continuous work period, and then the through hole for opening the branch passage is formed. After the plastic tube fitted to the inner peripheral surface of the pipe is pierced by the piercing device at the branch portion corresponding portion, the pipeline including all of the plurality of branch portions is once brought into the active pipe state. Therefore, after the construction period has elapsed, it becomes possible to restart the supply of the fluid to be conveyed to the destination using the pipeline in the active tube state. Moreover, since the excavation work and the seal work after the pipeline is in the live pipe state are performed for each individual branch portion, the pipe line for actually executing the excavation work and the seal work within the construction period. The length is not limited to the entire length of the pipeline in which the lining work was carried out within the construction period, but a part thereof (for example, the excavation work and the sealing work can actually be carried out within the construction period. Minutes) can only be set. For the unfinished work of the excavation work and the seal work, the schedule after the work period has been appropriately selected for the work.

[0006]

As described above, in the case of performing the pipeline rehabilitation repair work using the method of the present invention, each of the excavation work, the seal work, and the lining work is performed when the work period elapses. All must be completed,
The conventional condition that the Therefore, the conventional lining work can be carried out within the above-mentioned work period by exceeding the pipeline length in which all of the above works can be carried out. Therefore, if the lining work is to be carried out beyond the length of the pipeline that can complete all of the construction within the construction period, the pipeline rehabilitation will be performed at an appropriate time after the construction period has elapsed. When the repair work is resumed, the excavation work and the seal work have not been performed at the planned construction site, but the lining work has already been completed. Also, it is sufficient to perform only the sealing work, and the efficiency of a series of works can be improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the procedure of the method of the present invention, and FIG. 3 shows a drilling device 9 used in part for carrying out the method of the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a main pipe of a gas conduit which is buried in various places for supplying city gas to a consumer. The base ends of the branch pipes 2 that individually communicate with each other are connected to each other in the ground so as to communicate with each other, thereby forming an existing pipe line with a branch portion. Then, when it becomes necessary to rehabilitate the pipeline with the branch portion, the method of the present invention described below is applied.

First, by excavating two buried portions of the main pipe 1 to form two excavation holes 3 each having a size to be inserted by an operator, the main pipe 1 is excavated at two places of its pipeline. It is exposed in the hole 3. Then, an operator who enters the excavation hole 3 opens small through holes in a part of both exposed portions of the main pipe 1, and inserts the uninflated gas bags 4, 5 into the pipe through the through holes. After that, the gas bags 4 and 5 are inflated in the pipe, and two pipe lines of the main pipe 1 are temporarily cut off to rehabilitate the rehabilitable repaired portion of the pipe line with the branch portion. A partition is formed over both of the cutoff parts by (see Fig. (A)).

Next, both end portions of the rehabilitable and repairable portion are partially cut and removed to form two cut open portions 1a and 1b as shown in FIG. At one of the two temporary shutoff points in the main pipe 1 (that is, the temporary shutoff point on the gas supply source side into which one of the gas bags 4 and 5 is inserted). By operating the intermediate pressure closing jig 6 inserted into the pipe via one of the two cutting / opening portions 1a and 1b, a temporary closing state in which the intermediate pressure can be endured is realized. (See FIG. 1B), and after the realization, the one gas bag 4 which does not require the function of the temporary cutoff is removed.

Next, all of the constructions (that is, excavation construction, sealing construction, and lining construction) to be described later are carried out within a certain continuous construction period (for example, in the case of not performing night work, during the daytime continuation construction period). Under conditions that exceed the possible pipe length, a plastic tube 7 (for example, polyethylene, polyvinyl chloride, or polyester) having a length that is integral with a plurality of (6 in this embodiment) branch portions is provided. A plastic tube 7) such as the above is inserted into the main pipe 1 from the one cut open portion 1a, and the end of the cord 8 connected to the end of the tube 7 is connected to the two cut open portions 1a. , 1b of the other cutting opening 1
Bring out from b. Then, by pulling the end of the cord 8 from the other cut open portion 1b side to the outside (see FIG. 2C), the plastic tube 7 is extended along the entire length of the rehabilitable repair portion. Try to extend it.

Next, the plastic tube 7 is expanded (for example, a heating gas is passed through the plastic tube 7 to be heated and expanded), and the tube 7 is attached to the inner peripheral surface of the main pipe 1. By fitting as shown in FIG. 2D, lining work is performed on the inner peripheral surface of the main tube 1 to rehabilitate the main tube 1, and then the main tube is placed at a position corresponding to the branch portion of the plastic tube 7. 1
A through hole 7a for opening the branch passage is drilled over the entire length of the rehabilitable repairable portion by using a drilling device 9 which will be described later and is inserted therein.

After the through hole 7a is bored in this manner, the pipe line including all of the plurality of branch portions (ie, 6 branch portions in this embodiment) is once in a live tube state. After that, the buried portion of the branch pipe 2 is dug out to form an excavation hole for sealing work, and the sealing work for sealing the periphery of the through hole 7a using the excavation hole (for example, the above-mentioned The space between the plastic tube 7 and the main pipe 1 around the through hole 7a is filled with a sealing material that hardens soon after the filling is performed) for each branch portion. The excavation work and sealing work are to be carried out as much as possible within the above-mentioned fixed continuing work period, and the remaining part of the work is to be carried out at an appropriate time after the above-mentioned fixed continuing work period has passed (for example, a day after being appropriately selected) To be installed.

The punching device 9 is specifically constructed as shown in FIG. That is, the wires 91a, 91
A longitudinal main body 91 that can be moved in the main pipe 1 by being pulled in two directions by b, and provided on the longitudinal main body 91, and can be moved forward and backward in a direction orthogonal to the longitudinal direction of the longitudinal main body 91. A perforating member 92 having a tip portion 92a that can be partially fitted into the through hole 7a, a driving means 93 provided in the longitudinal main body 91 for controlling the advancing / retreating of the perforating member 92, and the perforating member 92. And heating means 94 for heating. The driving means 93 is, more specifically, the swing lever 9 which is swingable in the orthogonal direction.
3a is provided with the perforating member 92 attached to one end thereof, and the other end of the swing lever 93a is configured to be attracted to and separable from an electromagnetic solenoid 93b separately provided on the longitudinal main body 91. .

Next, another embodiment will be described. A drilling device for drilling the through holes 7a in each of the plurality of branching portion corresponding portions of the plastic tube 7 is designed to have a size that can be inserted into the branching pipe 2 from the supply destination side, and A part of the plastic tube 7 is constructed so that it can be heated and punched for drilling the through hole 7a (not shown), and the punching device is inserted into the branch pipe 2 from the supply destination side. An embodiment in which the through hole 7a is formed based on the heat punching is also conceivable.

In the above-described embodiment, the method of the present invention was applied when the main pipe 1 was an underground gas pipe for supplying city gas to the supply destination.
It goes without saying that the method of the present invention can be applied even in the case of a buried underground conduit (for example, a water pipe) for supplying a fluid other than city gas (for example, tap water) to a destination. Nor.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an initial stage of the method of the present invention.

FIG. 2 is an explanatory diagram showing the subsequent stage.

FIG. 3 is an explanatory view showing an example of a punching device.

[Explanation of symbols]

 1 main pipe 2 branch pipe 7 plastic tube 7a through hole 9 drilling device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yoji Mori, 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka, Osaka Gas Co., Ltd. (72) Inventor, Masaru Kato 4-chome, Hirano-cho, Chuo-ku, Osaka, Osaka No. 1-2 Osaka Gas Co., Ltd. (72) Inventor Masanori Akita 1130 Shimogayazu, Jinmeji-cho, Kaifu-gun, Aichi Prefecture Inventor Kazuhiro Hosono 118-2, Iwano-cho, Kasugai-shi, Aichi Prefecture (72) Inventor Akira Kamide 1-10-21 Nishi-Iwata, Higashi-Osaka City, Osaka Prefecture (72) Inventor Katsuhisa Minami 1462-1, Tomigaoka, Nara City, Nara Prefecture E 30-402

Claims (1)

[Claims] 1. A plastic tube in the main pipe (1) in contrast to an existing pipeline with a branch part in which the branch pipes (2) are connected to a plurality of locations of the main pipe (1) in a communicating state. By inserting (7) and fitting the plastic tube (7) to the inner peripheral surface of the main pipe (1),
After lining the inner peripheral surface of the main tube (1) to rehabilitate it, the plastic tube (7) is provided with a through hole (7) for opening a branch passage at a location corresponding to the branch portion.
It is a pipeline rehabilitation repair method for performing sealing work around the through hole (7a) after drilling a), wherein the lining work is performed in a plurality of branching parts in a state where the main pipe (1) is buried underground. Then, the perforating device (9) is inserted into the branch pipe (2) or the main pipe (1), and the plurality of branch portions corresponding to the plurality of branch portions of the plastic tube (7) are respectively inserted. After the through hole (7a) is bored, the pipeline including all of the plurality of branch portions is once brought into an active pipe state, and then the buried portion of the branch pipe (2) is excavated and the through hole (7a) is formed. ) A pipeline rehabilitation repair method that performs sealing work around each branch.