JP3534930B2 - Repair method of branch pipeline, repair bag and repair material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to repair of a branch pipe buried in the ground such as a sewer pipe, and more particularly to a branch pipe branched from the main pipe in the branch pipe and the branch pipe. The present invention relates to a method, a repair bag, and a repair material for repairing a main pipe portion near a branch portion following a pipe.

[0002]

2. Description of the Related Art Conventionally, in order to repair a pipeline, a lining material has been attached to the inner surface of the pipeline for lining.

However, particularly in a pipe line near the end, there is often a branch in the middle of the pipe line, and if the pipe line is lined with a lining material, the branch portion is blocked and the branch pipe and the main pipe are separated from each other. Lost connection.

Therefore, in a conventional pipeline having a branch, a lining material is applied to the main pipe including the branch portion to line it, and then the lining material at the branch portion is perforated to allow the branch pipe to pass through the main pipe. Is being done.

Further, in the case of lining the branch pipe, it is necessary to lining the branch pipe in a step separate from the lining of the main pipe.

However, particularly in sewerage pipes and the like, the branch pipe is thin and the burial depth is shallow, so that the branch pipe is liable to be damaged, and further damage is derived from the branch pipe, and the branch pipe in the vicinity of the main pipe is damaged. Damage often occurs.

Therefore, the lining of only the main pipe is not enough, and it is necessary to line the branch pipes. However, if the main pipe and the branch pipes are lined separately, the branch portion which is the joint between them is not provided. It was not possible to repair it reliably, and it was unavoidable that groundwater would infiltrate into the sewage due to damage at the branch, or that sewage would leak from the damaged part and contaminate groundwater.

A method disclosed in Japanese Patent Laid-Open No. 6-15738 is known as a method for repairing the branch portion in such a conduit with emphasis. In this method, a substantially T-shaped repair member that fits the main pipe and the branch pipe near the branch portion is fitted to the branch portion of the branch conduit, and expanded and bonded with a bag of substantially the same shape.

However, according to this method, since only the branch portion and its vicinity are repaired, the branch pipe continuing from the branch portion must be lined in another step, which inevitably complicates the step.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is an improvement of the method of the above-mentioned conventional example, in which an integral T-shape is provided from a branch pipe in a branch pipe line to a main pipe near the branch portion. The purpose is to fit a letter-shaped repair member and expand it with a repair bag of approximately the same shape to repair it. It is possible to remove the substantially T-shaped repair bag that was used for the repair. It is something that can be done.

[0011]

The method of repairing a branch portion of the present invention is, therefore, a part of the branch pipe and the main pipe branched from the branch pipe in the branch pipe path in which the branch pipe branches from the main pipe. Is a method of repairing a substantially T-shaped repair member comprising a short base portion that fits the inner surface of the main pipe, and a branch portion that branches over from the base portion and that fits over the entire length of the inner surface of the branch pipe. Inside, there is a base bag that fits the inner surface of the base and is closed at both ends slightly longer than the base, and a branch bag that fits the inner surface of the branch branched from the base bag over its entire length. A repair material formed by fitting a substantially T-shaped airtight repair bag is inserted into the main pipe, and the base of the repair member fitted with the base bag is positioned at a branch portion of the main pipe. Insert the branch part of the repair member with the bag in place over the entire length of the branch pipe. Then, pressure fluid is fed from the ends of the branch bag to inflate the repair bag, the repair member is crimped to the main pipe and the branch pipe, and then both ends of the base bag are passed inward through the branch bag. By pulling to
It is characterized in that the base bag and subsequently the branch bag are peeled off from the repair member while being turned upside down so that the outside is the inside, and then pulled out through the branch pipe of the repaired branch pipe line.

[0012] In this method, when pulling out the repair bag while turning it over, it is preferable that the repair bag is pulled out while applying a fluid pressure slightly higher than atmospheric pressure.

Further, the repair bag of the present invention comprises an airtight base bag whose both ends are substantially closed and which fits the inner surface of the main branch pipe to be repaired, and the branch pipe branched from the base bag. It consists of an airtight branch bag that almost fits the inner surface of the branch pipe, and the closed ends of the base bag are connected by connecting means in the base bag,
Further, the cord body connected to the connecting means is inserted into the branch bag.

In this repair bag, the connecting member may be a string-like member having both ends thereof connected to the inside of the closed ends of the base bag.

Further, as the structure of the base bag, both ends of an airtight flexible cylinder are turned inside and inserted into the cylinder, and both ends are connected in the cylinder. The part inserted through the inside may constitute the connecting means.

Further, the repair material of the present invention is such that the base of the repair bag which is open to both ends of the repair bag and which is open to both ends of the base bag, and the branch which fits to the outside of the branch bag. It is characterized in that a substantially T-shaped repair member composed of a portion is fitted.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state of preparation for repairing a branch pipe by the method of the present invention, where 1 is a main sewer pipe as a branch pipe, and a manhole 2 is provided in a part of the main pipe 1. Has been formed. 3 is a main pipe 1 at a branching portion 4.
It is a branch pipe branched from the, and the tip of the branch pipe communicates with a sewage box 5 opened on the surface of the earth.

Reference numeral 6 is a repair material, one example of which is shown in FIG.
Is shown in. In this repair material 6, 7 is a repair member, which is composed of a base portion 8 that fits the inner surface of the main pipe 1 and a branch portion 9 that can branch from the base portion 8 and fit the branch pipe 3. It has a substantially T shape as a whole, and has a base 8
Both ends and the end of the branch 9 are open.

The repair member 7 is made by impregnating a curable resin liquid into a woven or non-woven fabric or a laminate thereof,
It is possible to form a base portion 8 and a branch portion 9 by rolling an uncured FRP sheet or the like in which glass fibers or the like are dispersed in a curable resin liquid and partially thickened into a cylindrical shape, and both edges thereof are overlapped. it can. It is also possible to use a tubular woven fabric, a non-woven fabric or a laminate thereof sewn into a predetermined shape and impregnated with a curable resin liquid.

Reference numeral 10 denotes a repair bag, which is made of an airtight material and which is adapted to the inner surface of the base 8 of the repair member 7 and a base bag 11 which is branched from the base bag 11 to branch the repair member 7. The branch bag 12 is formed on the inner surface of the portion 9 over the entire length thereof, and has a substantially T-shape as a whole.

In the repair bag 10, the base bag 11 is fitted to the base 8 of the repair member 7 and the branch bag 12 is fitted to the branch 9 of the repair member 7 to form the repair material 6. is doing.

The length of the base bag 11 of the repair bag 10 is slightly longer than that of the base portion 8 of the repair member 7, both ends thereof project from the ends of the base portion 8, and both ends thereof are closed. Both ends of the base bag 11 are connected by a string-like body 13 as a connecting means on the inner surface thereof, and the string body 14 connected to the central part of the string-like body 13 is inserted into the branch bag 12. Has been done.

Instead of the above structure, the repair bag 10 has two cords each having ends connected to both ends of the base bag 11 and pulled out through the branch bag 12 to the open end. You can also

FIG. 3 shows another example of the repair bag 10 according to the present invention, in which both ends of the tubular body 15 made of a flexible and airtight material are turned inward so that the inside of the tubular body 15 is covered. It has been inserted, and both ends thereof are connected in the cylindrical body 15 to form a double cylinder, which is a base bag 11.

The branch bag 12 is connected to the central portion of the outer portion 15a of the cylindrical body 15, and the inner portion 15
b constitutes a connecting means for connecting both ends of the base bag 11, the cord body 14 is coupled to the central portion of the inner portion 15b, and the cord body 14 is inserted into the branch bag 12.

Referring again to FIG. 1A, the repair material 6 is inserted from the manhole 2 into the main pipe 1, and the branch bag 1
The branch portion 9 into which the two are fitted is also bent with respect to the base portion 8 and inserted into the main pipe 1.

Reference numerals 16a and 16b are tow lines, and one of the tow lines 16a is connected to a conveying means 17 such as a sheet-like object on which the repair member 7 is placed and inserted into the main pipe 1 and the other tow line. The rope 16b is connected to the tip of the branch portion 9 of the repair member 7, is inserted from the main pipe 1 through the branch portion 4 into the branch pipe 3, and is drawn out from the waste water box 5.

Then, the repair material 6 is pulled by the tow lines 16a and 16b to enter the main pipe 1, and as shown in FIG. 1 (b), the branch portion 9 is moved from the branch portion 4 to the branch pipe 3 by the tow line 16b. It is drawn in and its tip is exposed in the wastewater box 5, and the base 8 is pulled by the tow line 16a.
It is arranged in the main pipe 1 near the branch portion 4. After the arrangement, the transportation means 17 is removed from the inside of the main pipe 1.

Here, the branch bag 12 of the repair bag 10
When a pressure fluid is inserted into the repair bag 10 from the tip of the base bag 11 and the base bag 11 and the branch bag 1 as shown in FIG.
2 is inflated and the repair member 7 fitted to the outside is expanded, and the base portion 8 is crimped to the inner surface of the main pipe 1 and the branch portion 9 is crimped to the inner surface of the branch pipe 3.

In this state, the curable resin liquid impregnated in the repair member 7 is hardened, and thereby, in the main pipe 1 in the vicinity of the branch pipe 3 and the subsequent branch portion 4, a substantially T-shaped FR is formed.
A P-tube is formed and repaired.

When pressurized steam is used as a heating means when curing the repair member 7, it is preferable to provide a drain hole 18 at the end of the base bag 11 as shown in FIG. When hot water is used as the heating means, a hot water injection tube (not shown) is fed from the tip of the branch bag 12 to the base bag 11, hot water is injected from the hot water injection tube, and excess hot water is injected. It is preferable that the hot water in the bag 10 be circulated favorably by overflowing the branch bag 12 from the tip of the branch bag 12 and discharging it.

Next, the cord 14 is pulled from the tip of the repair member 7 of the repair bag 10 while applying some internal pressure to the repair bag 10. Thereby, the cord body 14 pulls the cord body 13, and the cord body 13 pulls the cord body 13 for repair.
The end of the base bag 11 at 0 is pulled inward, and the base bag 11 is pulled in at both ends while being inverted so that the outside is inside.

Then, the base bag 11 is peeled from the inner surface of the base portion 8 of the repair member 7 which is crimped to the main pipe 1 by being turned inward from both ends. The portion of the base bag 11 that is peeled off from the base portion 8 and turned inward is pulled by the string-like body 13 and drawn from the branch portion 4 into the branch bag 12 in the branch pipe 3 as shown in FIG.

The base bag 11 is peeled off from the base 8 of the repair member 7 over the whole, and the branch bag 1 is turned over.
If it is retracted into 2, then the branch bag 12
Is also inverted from the end on the side of the branch portion 4 so that the outer side is the inner side, and is peeled off from the inner surface of the branch portion 9 crimped onto the branch pipe 3.

In this way, the end of the branch pipe 3 to the cord 14
By pulling the base bag 11 and then the branch bag 12 so that the outer side is the inner side, the base bag 11 is peeled off from the inner surfaces of the base portion 8 and the branch portion 9 of the repair member 7, and the peeled repair is performed. The bag 10 can be taken out from the open end of the branch pipe 3. After removing the repair bag 10, the branch pipe and the repair member 7 that repairs the main pipe 1 portion following the branch pipe 3 and the branch portion 4 in the branch pipe are left.

In the present invention, a waterproof material such as a packing of water-expandable rubber is attached to both ends of the base portion 8 of the repair material 6 and the outer periphery of the end of the branch portion 3, and the waterproof material is attached to the repair material 6.
It is possible to secure a more complete water tightness of the pipeline by pressing it between the inner surface of the pipeline and the inner surface of the pipeline.

[0037]

According to the method of the present invention, the branch pipe 3 and the branch portion 4, which are apt to be damaged in the sewer pipe, are repaired at the same time, and the damaged portion is closed to effectively prevent the mixing of ground water and the leakage of waste water. At the same time, since the branch pipe 3 and the branch portion 4 are repaired as a unit, unlike the case where they are repaired separately, it is possible to effectively prevent water leakage from the joint between the repairs.

Further, the repair bag 10 is fitted inside the repair member 7, and it is difficult to remove the repair bag 10 by a usual method, but in the present invention, the repair bag 10 is used. By peeling 10 from the repair member 7 while reversing so that the outside is the inside, the branch pipe 3
It is possible to take out through.

Further, in the repair bag 10 of the present invention, the inside of the closed both ends of the base bag 11 is attached to the cord-like body 1.
3 is connected by a connecting member such as 3, and the cord 14 connected to the connecting member is inserted into the branch bag 12, so that the cord 14 is pulled after the repair member 7 is attached to the branch conduit. The base bag 11 and the branch bag 12 can be peeled off from the repair bag 7 and pulled out from the branch bag 12 while being turned upside down so that the outside is the inside.

Further, in the repair material 6 of the present invention, since the repair member 7 is supplied in a state in which it is fitted to the outside of the repair bag 10, it can be directly applied to the above-mentioned repair method. Moreover, after repairing the branch conduit using the repair material 6, the repair bag 10 can be easily removed by pulling the cord body 14.

[0041]

According to the method of the present invention, therefore, the branch pipe 3 of the branch pipe to the main pipe 1 in the vicinity of the branch portion 4 can be easily and reliably repaired as one unit, and water leakage or ground water can be repaired. Can be effectively prevented from entering the pipeline. Further, since the branch pipe 3 and the branch portion 4 are repaired as one body, water leakage from the connection portion for repair does not occur unlike when repairing them separately.

Since the repair material 6 can be repaired only by operating the terminal of the branch pipe 3 after the repair material 6 is installed at the branch portion of the branch pipe, a plurality of branch portions 4 are formed in the main pipe 1. In the case where the branch portion 4 and the branch pipe 3 are
It is possible to repair in parallel at the same time.

Further, according to the present invention, since the repair bag 10 is pulled out from the branch pipe 3 while being turned upside down so that the outer side is the inner side, the repair bag 10 used for repair work is operated by the operation from the tip of the branch pipe 3. It can be easily removed, and the repair bag 10 does not remain behind to hinder distribution.

[Brief description of drawings]

1 is a central longitudinal sectional view showing a preparatory step for repairing a branch portion according to the present invention, (a) shows a state in which a repair material 6 is inserted from a manhole 2, (b) shows a repair material 6 at a branch portion 4; And the state installed in the branch pipe 3.

FIG. 2 is a central longitudinal sectional view showing an example of a repair material 6 of the present invention.

FIG. 3 is a central longitudinal sectional view showing an example of a repair bag 10 of the present invention.

FIG. 4 is a central longitudinal sectional view showing a process of repairing the branch portion 4 and the branch pipe 3 according to the present invention.

FIG. 5 is a central longitudinal sectional view showing a state in which the repair bag 10 is removed after repairing according to the present invention.

[Explanation of symbols]

1 main 3 branches 4 branches 6 Repair materials 7 Repair parts 8 base 9 branches 10 Repair bag 11 base bag 12 branches bag 13 string 14 String 15 cylinder 15b Inner part of cylinder

Front page continuation (72) Inventor Eiji Kitagawa 3-183, Kyomachi, Fushimi-ku, Kyoto, Japan No. 507, Riviere Momoyama (56) References JP-A-6-15738 (JP, A) JP-A-7-68642 (JP , A) JP-A-63-286325 (JP, A) JP-A-1-258938 (JP, A) JP-A-56-150684 (JP, A) Actually developed JP-A-58-56285 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16L 55/16 B29C 63/28

Claims (6)

(57) [Claims] 1. The branch pipe (3) and a part of the main pipe (1) branched from the branch pipe (3) in a branch pipe line branched from the main pipe (1) are repaired. A short base portion (8) adapted to the inner surface of the main pipe (1) and a branch portion adapted to the inner surface of the branch pipe (3) branched from the base portion (8) over the entire length. In a substantially T-shaped repair member (7) consisting of (9), a base bag (1) adapted to the inner surface of the base (8) and having both ends closed slightly longer than the base (8).
1) and a branch bag (1) that fits the inner surface of the branch (9) branched from the base bag (11) over its entire length.
2) Airtight repair bag (1)
0) is inserted into the main pipe (1), and the base (8) of the repair member (7) fitted with the base bag (11) is connected to the main pipe (1). ), The branch part (9) of the repair member (7) fitted with the branch part bag (12) is inserted over the entire length of the branch pipe (3), and the branch part bag (12) is inserted. A pressure fluid is fed from the end of (12) to inflate the repair bag (10) to press the repair member (7) onto the main pipe (1) and the branch pipe (3), and then the base bag (11). ) Both ends of the branch bag (1
2) By pulling inward through the inside, the base bag (11) and subsequently the branch bag (12) are peeled off from the repair member (7) while being turned over so that the outside is the inside, and the repaired branch pipe line Method for repairing a branch pipe, characterized by pulling out through a branch pipe (3) of 2. The repair bag (10) is pulled out while being turned over while applying a fluid pressure slightly higher than atmospheric pressure into the repair bag (10). How to repair a branch line 3. An airtight base bag (1) having both ends closed which fits the inner surface of the main pipe (1) of the branch pipe to be repaired.
1) and an airtight branch bag (12) that substantially fits the inner surface of the branch pipe (3) of the branch line branched from the base bag (11), and the base bag (11) is closed. The two ends are connected by connecting means (13, 15b) in the base bag (11), and the cord body (14) connected to the connecting means (13, 15b) is the branch bag ( 12) A bag for repairing a branch pipe, which is inserted through the inside 4. The cord-like body (1) having the connecting means connected at both ends thereof to both closed ends of the base bag (11).
3) The bag for repairing a branch line according to claim 3, characterized in that 5. The base bag (11) is inserted into the tubular body (15) by inverting both ends of an airtight flexible tubular body (15) inward, and inserting the both ends into the tubular body (15). 15. The branch conduit according to claim 3, characterized in that a portion (15b) that is connected inside the tubular body (15) and is inserted inside the tubular body (15) constitutes the connecting means. Repair bag 6. A base part, which is open on both sides of the repair bag (10) according to claim 3, 4 or 5, and which fits on the outside of the base bag (11) of the repair bag (10). (8) and a substantially T-shaped repair member (7) consisting of a branch (9) that fits on the outside of the branch bag (12) are fitted together. Material