JP2003175548A - Method for correcting repair of piping - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide lining excellent in executing properties and in the finish, for any conditions of piping. <P>SOLUTION: A line-passing belt 11 with a pig is inserted through an object pipeline 1. The pig is advanced from one end of the pipeline 1 toward the other and a resin lining layer is formed on the inner surface of the pipeline 1. A branch part IE of the pipeline 1 is put in an open state on the occasion and suction is made from the other end side of the pipeline 1. A leading pig 20 being connected to the line-passing belt 11 subsequently, a leading resin 21 is filled in the rear of this pig and further a reversal lining hose 22 is connected. The leading pig 20 is advanced to the other side and the reversal lining hose 22 is stuck on the resin lining layer formed previously. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rehabilitating a pipe, and more particularly to a method for rehabilitating a pipe effective for a pipeline having a branch portion.

[0002]

2. Description of the Related Art The method of rehabilitating pipes in the existing condition is
Various construction methods have been developed, and for example, a resin lining method that forms a resin lining film on the inner surface of the pipe, or a lining construction method that introduces a flexible inner hose into the pipe and adheres to the inner surface of the pipe. Is being implemented as a practical construction method. Among them, it has been confirmed that the lining method is effective in preventing leakage even when the pipeline is damaged after construction, and has received renewed attention as an effective method for earthquake countermeasures.

In this lining method, various proposals have been made in pursuit of improvement of workability, but as an effective method of improving workability during work and ensuring stability after work, For example, a simple inversion lining construction method as described in JP-A-9-241602 is known.

This prior art will be described with reference to FIG. 5. A suction pump 3 having a valve 2 is hermetically connected to an opening 1C at one end of a conduit 1 (elbow for 1A and socket for 1B). The leading pig 4 is inserted into the conduit 1 through the other end opening 1D, the resin cassette 5 is attached to the other end opening 1D, and the suction pump 3 is operated to enter the conduit 1. A negative pressure is generated and a required amount of adhesive is introduced into the conduit 1 to form a filling layer of the lead resin 6. Then,
The suction pump 3 is once stopped, the resin cassette 5 is removed, and the hose delivery / storage device 7 is attached to the other end opening 1D. In the hose delivery / storing device 7, a reverse lining hose 8 is wound around a reel or the like, and the end of the reverse lining hose 8 is provided in a folded state,
Further, a blower (not shown) is connected. Then, the suction pump 3 is operated again to suck the leading pig 4 and a back pressure is applied to the reversing liner hose 8 by a blower, so that the leading pig 4, the lead resin 6, and the reversing liner hose 8 are drawn.
Is advanced from the other end opening 1D of the conduit 1 toward the one end opening 1C, and the reverse lining hose 8 is bonded to the inner surface of the conduit 1 by the leading resin 6.

According to this simple inversion liner construction method, since the leading resin 6 is filled at the tip of the inversion liner hose 8 traveling in the pipe line 1 while inversion, the progress of the inversion liner hose 8 is improved and the construction is improved. Since the preparatory work for previously filling the reverse lining hose 8 with the adhesive can be omitted, there is an advantage that workability at the time of construction is also improved.

Further, the reverse lining hose 8 and the leading pig 4
Since the leading resin 6 is filled in the gap and the leading pig 4 is advanced by the suction force (negative pressure) of the suction pump 3, bubbles do not enter between the reverse liner hose 8 and the inner surface of the conduit 1. Can be completely prevented, and an inner lining with a good finish can be applied. In addition, since the reverse lining hose 8 is adhered on the pre-lining made of the lead resin 6, a double lining is provided and the stability after construction can be secured.

[0007]

The conventional simple inversion lining method having such advantages has the following problems depending on the piping condition of the target pipeline.

That is, as shown in FIG. 6, the branch portion 1E
A method of advancing the leading pig 4 and the reversal lined hose 8 by the suction force A and the back pressure B when the branch pipe connected to the branch portion 1E is rehabilitated with the existing state of the pipe line 1 having the Therefore, it is necessary to seal the branch end of the branch portion 1E and make the pressure in the pipe line 1 in front of the leading pig 4 negative, including the inside of the branch portion 1E. If you do,
When the leading pig 4 passes through the branching portion 1E and the layer of the leading resin 6 reaches the branching portion 1E, a negative pressure in the branching portion 1E causes a large amount of invasion of the leading resin 6 into the branching portion 1E ( (See 6a in the figure).

For the conduit 1 having such a branched portion 1E, it is considered that after the reverse lining hose 8 is bonded, a perforation robot is put into the pipe to form a branch hole in the reverse lining hose 8. However, as described above, if a large amount of resin enters the branch portion 1E, there is a problem that the branch portion 1E cannot be opened even by the boring robot.

Further, the leading pig 4 and the reversal lined hose 8
Since the resin is advanced only by the pressure difference, even if the advancement by the lead resin 6 is improved, it is not possible to obtain sufficient insertability for a piping system having a complicated bend or joint. There are also problems.

The present invention has been proposed in order to cope with such a situation, and aims to deal with various piping systems while making the most of the advantage of the simple inversion lining method. Regardless of this, it is an object of the present invention to provide a pipe rehabilitation repair method that has good workability and that can ensure stability after construction.

[0012]

In order to achieve such an object, the invention according to each claim has the following features.

According to the first aspect of the present invention, a line is inserted into the target pipeline having a branching portion, and the lining pig connected in the middle of the pipeline advances from one side of the pipeline to the other. By doing so, a first lining step of forming a resin lining layer on the conduit, a lead pig is connected to the lead wire, and a reverse lining hose is connected to the rear of the lead pig in a state of being filled with the lead resin, A second lining step of adhering the reverse lining hose onto the resin lining layer by advancing a leading pig from one side to the other side of the pipe, and in the first lining step, the branch portion is opened. In this state, the inside of the pipe is sucked from the other side of the pipe.

According to the second aspect of the invention, the pipe rehabilitation repair method based on the first aspect of the invention, that is, the line is inserted into the target pipeline having the branch portion and is connected in the middle of the line. A first lining step of forming a resin lining layer on the pipeline by advancing the lining pig from one side toward the other side of the pipeline, and connecting the leading pig to the through wire,
The reversal lined hose is connected to the rear side in a state of being filled with the leading resin, and the reversal lined hose is bonded onto the resin lining layer by advancing the leading pig from one of the conduits toward the other. A second lining step, and in the first lining step, the inside of the pipe is sucked from the other side of the pipe line in a state where the branch portion is opened,
Also in the second lining step, the inside of the pipe is sucked from the other side of the pipe.

The invention according to each claim having the above-mentioned features has the following functions.

The pipe rehabilitation repair method in claim 1 is
In this method, a resin lining layer is formed on the inner surface of the pipe by the first lining step, and then a reverse lining hose is bonded onto the resin lining layer by a simple reverse lining method.

Although the progress of the pig and the reverse lining hose is secured by a wire, it is difficult to insert the wire after that because the resin lining layer is formed in the first lining step. Prior to the step, a wire is inserted, and the first and second lining steps are performed by the guidance by this wire. As a result, even in a piping system having a complicated bent portion and various joints, it is possible to apply the reverse lining lining with excellent insertability.

Then, in the first lining step,
Since suction is performed from the other side of the pipe line and the lining is performed with the branch portion opened, the resin does not float or penetrate into the branch portion. In addition, in the second lining step, by forming the resin lining layer first, the amount of the lead resin can be reduced, and the infiltration of the resin into the branch portion can be avoided as much as possible.

As a result, after the reverse lining hose is bonded,
The branching portion can be easily opened by inserting the punching robot into the pipe. As a result, the branch pipe connected to the branch portion can complete the rehabilitation repair work for the target pipeline while keeping the existing state, and the labor of the construction and the construction cost can be reduced.

Further, in the second lining step, since the reverse lining hose is adhered in a state where the leading resin is filled in the rear of the leading pig, even if the resin lining layer previously formed is disturbed by the wiring. A good pre-lining layer can be formed again, and since bubbles can be prevented from entering between the reverse lining hose and the inner surface of the pipe by filling the lead resin, it is possible to perform strong reverse lining work with good finished adhesion. It is possible.

According to the pipe rehabilitation repair method of the second aspect, in addition to the above-mentioned action, suction is performed from the other side of the pipe line also in the second lining step, so that the reversal lined hose and the pipe inner surface are caused by this suction action. It is possible to completely prevent air bubbles from penetrating between them, and it is possible to provide a reversal lining with a better finished adhesiveness. Further, since this suction may be performed with a small pressure that assists the running action of the wire passage, in this case as well, the infiltration of the resin into the branch portion in the second lining step can be avoided as much as possible.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings (note that the same parts as those in the conventional art are designated by the same reference numerals and the description thereof will not be repeated). Figure 1
FIG. 4 is an explanatory view showing each step of the construction method according to the embodiment of the present invention.

[Passing Line Inserting Step] First, as shown in FIG. 1, the passing line belt 11 having the lining pig 10 connected midway is inserted into the pipeline 1 having the branch portion 1E to be rehabilitated. This wire insertion can be performed using a known method such as a parachute method. Then, a resin inlet 1F is formed near one end of the pipe 1.

[Lining resin charging step] Next, as shown by the arrow in FIG. 2, the lining resin is charged from the resin charging port 1F. At this time, the lining pig 10 is inserted into the conduit 1 by the guide of the passing belt 11 and stopped before the resin charging port 1F, and the lining resin is charged in front of the lining pig 10 so that the resin filling layer 12 is formed.

[First Lining Step] Next, as shown in FIG. 3, the lining pig 10 is advanced from one end to the other end of the conduit 1 by the guide by the passage belt 11. The resin lining layer 12A is formed on the inner surface. At this time, all branch ends of the branch portion 1E of the pipeline 1 are opened, and suction force A is applied from the other end side of the pipeline 1 to secure ventilation C in the branch portion 1E. As a result, even when the resin lining layer 12A is formed on the inner surface of the conduit 1, the suction force A causes air to constantly flow from the branch portion 1E, so that the resin does not infiltrate or float up into the branch portion 1E.

[Second Lining Step] Then, after the first lining step is completed, as shown in FIG. 4, a second lining step is performed by a simple inversion lining method. According to this, the passing belt 11 already inserted in the conduit 1
A leading pig 20 is connected to the rear end, a leading resin is charged from the resin charging port 1F to form a leading resin filled layer 21 behind the leading pig 20, and a reverse lining hose 22 is connected behind the leading resin filling layer 21. That is, a wire is previously installed inside the reverse lining hose 22, and this wire and the above-mentioned wire belt 11 are connected via the leading pig 20.

Then, the leading pig 20, the leading resin-filled layer 21, and the reversal are induced by the guide by the passage belt 11, the suction force A from the other end side of the conduit 1 and the back pressure B applied to the reversal lining hose 22. The lining hose 22 is advanced toward the other end side of the conduit 1, and the reverse lining hose 22 is bonded onto the resin lining layer 12A previously formed.

In the second lining step, since the reverse lining hose 22 is adhered onto the resin lining layer 12A, the amount of the lead resin is small, and thus the resin is prevented from entering the branch portion 1E as much as possible. be able to. Further, since the space between the leading pig 20 and the lining reversing hose 22 is filled with the leading resin, and the suction force is applied to the tip of the leading pig 20, the reversing lining hose 22 and the inner surface of the conduit 1 are lined up during lining. There is no air bubble between them and the lining can be performed with extremely good finished adhesiveness.

In this construction method, after the resin lining layer 12A is formed by the first lining step, the reverse lining tube 22 can be adhered to the inner surface of the conduit 1 by the second lining step, thus forming a double structure of the lining layer. Since it is possible, it will be possible to carry out robust rehabilitation. Moreover, by performing each of these steps by guiding with the wire belt 11, sufficient insertability can be secured regardless of the form of the piping system.

Further, the passage belt 11 is inserted prior to the first and second lining steps, so that it is possible to guide each step by inserting the passage once. Transition between can be performed smoothly. Then, after the first lining step, by the passing belt 11,
Even if the resin lining film 12A is disturbed, the adhesive surface can be repaired by the leading resin in the subsequent second lining step, so that the adhesiveness of the reverse lining hose 22 can be kept good.

After the completion of the second lining step, the branch portion 1
Since there is no infiltration of resin into E, it is possible to apply a perforation robot to open the branching portion, which enables labor saving in construction and cost reduction.

[0032]

Since the present invention is constructed in this way,
It is possible to apply a liner lining that has good workability and good finish for any piping condition.
Furthermore, it will be possible to carry out robust repairs. In particular, in a pipeline having a branch portion, it is possible to avoid the infiltration of resin into the branch portion,
Since the branch hole can be opened by the boring robot after the lining is completed, labor saving in the construction is possible.

[Brief description of drawings]

FIG. 1 is an explanatory view illustrating a step (passing wire insertion step) of a construction method according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating one step (lining resin charging step) of the construction method according to the embodiment of the present invention.

FIG. 3 is a step (first step) of a construction method according to an embodiment of the present invention.
It is explanatory drawing explaining a lining process.

FIG. 4 is a step (second step) of the construction method according to the embodiment of the present invention.
It is explanatory drawing explaining a lining process.

FIG. 5 is an explanatory diagram illustrating a conventional simple inversion lining method.

FIG. 6 is an explanatory diagram showing a conventional problem.

[Explanation of symbols]

1 pipeline 1E branch 1F resin inlet 10 Lining Pig 11 passing belt 12 Resin-filled layer 12A resin lining layer 20 Leading Pig 21 Lead resin filled layer 22 Inverted liner hose

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // B29L 23:00 F16L 55/00 QF term (reference) 4D075 AG11 AG12 AG14 AG23 DA15 DA19 DC05 EA07 EA31 4F042 AA25 EA12 EA18 EA30 EA35 4F211 AD05 AD14 AG08 AG29 SA14 SA15 SC03 SD04 SN19 SP12 SP17

Claims (2)

[Claims] 1. A pipe is inserted through a target pipeline having a branching portion, and a lining pig connected in the middle of the pipeline is advanced from one side of the pipeline to the other side of the pipeline. A first lining step of forming a resin lining layer on the passage; connecting a lead pig to the lead wire; connecting a reverse lining hose behind the lead pig with the lead resin filled therein to connect the lead pig to the conduit. And a second lining step of adhering the reverse lining hose onto the resin lining layer by advancing from one side to the other side, and in the first lining step, the pipe is formed with the branch portion opened. A pipe rehabilitation repair method characterized by suctioning the inside of the pipe from the other side of the road. 2. The pipe rehabilitation repair method according to claim 1, wherein the inside of the pipe is suctioned from the other side of the pipe line even in the second lining step.