JP3865649B2 - Lining method of rehabilitation pipes for buried pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a configuration of a rehabilitating pipe lining method for a mounting pipe branched from a main pipe buried underground.
[0002]
[Prior art]
Currently, many pipes for sewage are buried underground. In addition to the main pipe, this pipe line is generally composed of a manhole and a mounting pipe (branch pipe). Among such pipes, in particular, the mounting pipe is provided so as to extend over the fence and the main pipe provided on the ground, and unlike the main pipe or manhole, the pipe diameter is small and simply configured. . For this reason, the inner surface of the mounting pipe is often damaged along with its aging, and the connection part between the main pipe and the mounting pipe that were firmly attached at the beginning is loosened due to ground fluctuations, etc. Rain water and spring water may flow from the connection part. Such damage to the inner surface of the mounting pipe impairs the normal function of the mounting pipe, and if the inflow water enters the main pipe from the connection between the main pipe and the mounting pipe, There is a risk of exceeding the amount of water.
[0003]
In order to eliminate such troubles in the mounting pipe and inconvenience due to the inflow of inflowing water, the mounting pipe has been rehabilitated by lining the inner surface of the mounting pipe with resin.
[0004]
As a conventional lining method for the rehabilitation pipe of this attachment pipe, as disclosed in JP-A-1-204724, a heat-resistant tube is inserted inside the hard tube and introduced to the base end of the attachment pipe. Then, it is expanded by heating and pressing from the inside of the heat-resistant tube. There is a lining method for recovering the heat-resistant tube after the hard tube is cooled and solidified.
[0005]
[Problems to be solved by the invention]
However, since the lining method of the rehabilitation pipe with respect to the conventional mounting pipe described above is a method using a heat-resistant tube, operations such as insertion of the heat-resistant tube into the inside of the hard tube and recovery after the lining of the hard tube are performed. In addition to lack of quickness, a separate heat-resistant tube is required, resulting in a disadvantage of increasing the economic burden.
[0006]
Moreover, in the conventional method described above, various materials can be used as the hard tube to be lined by using the heat resistant tube, but the heat resistant tube is not only heat resistant but also a hard tube. In addition, a material rich in thermoplasticity (heat deformability) at the time of heating and pressing must be selected, and there is a limitation for that. This is because, when the heat resistant tube is made of a material having a small thermoplasticity, the expansion effect on the hard tube is insufficient and non-uniform, and the lining configuration of the inner surface of the mounting tube by the hard tube is incomplete.
[0007]
In addition, it is not sufficient to simply seal the rehabilitation pipe on the inner surface of the attachment pipe as a seal structure for the joint portion between the main pipe and the attachment pipe. Further, as disclosed in Japanese Patent Application Laid-Open No. 63-167193, the method of forming a reinforcing pad such as a resin or a rubber material is complicated and cannot be performed quickly.
[0008]
Therefore, an object of the present invention is to provide a method for lining a rehabilitating pipe with respect to an embedded mounting pipe that can be constructed on the inner surface of the mounting pipe quickly, economically, reliably and easily.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the lining method of the rehabilitating pipe with respect to the buried mounting pipe of the present invention is a lining method of the rehabilitating pipe with respect to the inner surface of the mounting pipe branched from the main pipe buried underground. end to form a flange by flange machining on the, retraction jig provided in a state in which the pinch at the other end, the attachment tube through the rehabilitating pipe in the main pipe from the manhole side through its retracted jig pulled up and pull the end portion of the other side of the rehabilitating pipe until the桝側mounting tube end, both pasted the flange surface main pipe portion lower end spans of the mounting tube, sealing the flange side of the rehabilitating pipe in the and drawer cooled by expanded the rehabilitating pipe by pressurizing by feeding heated gas from桝側in rehabilitating pipe has, by cutting off the end of the pulled-out rehabilitating pipe, the inner surface of the mounting tube rehabilitating pipe It is characterized by lining.
[0010]
The lining method of the rehabilitating pipe for buried mounting tube of the present invention described above, in advance to form a flange at one end of the rehabilitating pipe by the flange machining, attached to the flange surface main pipe portion mounting tube extends while sealed and cut the other end of the rehabilitating pipe pulled out to桝側, manhole heated gas from the end portion side in this excised from it was to steam, substantial work on rehabilitating pipe, It can be performed outside the main pipe and the mounting pipe. Therefore, the operation can be performed easily and quickly.
[0011]
Also, in order to pull through the main pipe from the manhole side through the main jig through the pull-in jig provided at the other end of the rehabilitation pipe, for example, by attaching a wire to the pull-in jig and pulling this wire The rehabilitation pipe can be introduced into the mounting pipe. In this case, a hook hole can be provided in the drawing jig, a hook attached to the wire can be engaged with the hook hole, and the wire can be wound with a winch or the like.
[0012]
Examples of the heated gas fed into the rehabilitation pipe include water vapor. As a heating gas feeding means, a heating gas supply unit of a steam pressurizing device is attached to an end portion that is pulled out and cut off on the heel side, and the heating gas can be fed into the rehabilitation pipe from this gas supply unit. At this time, since one end of the rehabilitating tube is sealed, the rehabilitating tube is heated by the heated gas to be expanded in diameter. In this case, the sealing means at one end of the rehabilitation pipe can be a packer or the like introduced into the main pipe.
[0013]
As a means for sticking the reed pipe surface to the inner wall surface part of the main pipe that extends to the lower end of the mounting pipe, an adhesive layer such as butyl rubber is provided in advance on the inner wall surface part of the main pipe or the reed pipe surface. It can be affixed in a state where the reed pipe surface is pressed by the above-described packer or the like through the adhesive layer.
[0014]
Furthermore, an inflatable balloon-like stopper that expands in a shape conforming to the inner wall surface portion of the main pipe or the rib surface of the correction pipe is provided at one end of the correction pipe, and provided at the other end of the renovation pipe. The stopper is connected to the retraction jig through a pipe so that the stopper does not leave the reed tube. Then, in a state of being contracted stoppered, the rehabilitating pipe drawn into the attachment tube through the main pipe from the manhole side through its retracted jig, the end portion of the other side of the rehabilitating pipe in桝側mounting tube end The rehabilitating pipe is pulled out and attached to the main pipe part where the lower end of the mounting pipe extends, and the stopper on the reed pipe side is inflated by the gas supplied through the pipe and stopped. The rehabilitating tube is expanded and cooled by sending heated gas from the heel side and pressurizing it, cooling it, and discharging the gas in the plug through the pipe and contracting it. It can be pulled out to the side. In this case, the plug as a sealing means provided in the ridge of the correction pipe is recovered to the heel side through the inner surface (attachment pipe) after the lining of the correction pipe, and the plug (sealing means) is recovered from the main pipe through the manhole. Work can be abolished.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
<First Embodiment>
Next, the lining method of the rehabilitation pipe | tube with respect to the buried attachment pipe | tube which concerns on the 1st Embodiment of this invention is demonstrated based on figures.
[0016]
In FIG. 1, the processing form with respect to the rehabilitation pipe | tube 1 was shown. One end 1 a of the rehabilitation pipe 1 is provided with a ridge 2. That is, the end portion 1a of the rehabilitated tube 1 is softened by heating, and a reversing process is performed by pressing a plating die against the softened end portion 1a. Moreover, about the other edge part 1b of the rehabilitation pipe | tube 1, two symmetrical attachment jigs 3 are attached in the pinched state. The fixing jig 3 can be fixed by a bolt 4 and a nut 5.
[0017]
In this case, the pinch form of the edge part 1b can employ | adopt the various forms of FIGS. That is, the pinch form shown in FIG. 2 is obtained by deforming the end of the rehabilitation pipe 1 into a U shape like the end 1c, and the form shown in FIG. 3 is obtained by transforming into a star like the end 1d. The form shown in FIG. 4 is an X-shaped modification like the end 1e, and the form shown in FIG. 5 is an end 1f obtained by further compressing the end 1e from above and below, as shown in FIG. The form is modified into an S shape like the end 1g of the rehabilitated tube 1, and the forms shown in FIGS. 7 and 8 are formed as end parts 1h and 1i which are further deformed to have multiple folds. By providing such a pinch form at the end of the rehabilitation pipe 1, the entire rehabilitation pipe 1 is deformed thinly, and in particular, the rehabilitation pipe 1 can be easily and quickly inserted into the attachment pipe 13 shown in FIG. Is possible.
[0018]
A hook hole is provided at the tip of the attachment jig 3, and the hook 7 attached to the end of the wire 6 is locked in this hook hole. As shown in FIG. 9, the hook 7 of the wire 6 is guided in advance from the attachment tube 13 side to the manhole 11 through the main tube 12, and the other end side is wound around the winch 16. . Therefore, by driving the winch 16, the rehabilitation pipe 1 is pulled by the locked wire 6 and introduced from the manhole 11 to the inside of the attachment pipe 13 through the main pipe 12. At this time, the wire 6 and the rehabilitation pipe 1 are guided according to the guide roller 8 in order to avoid the collision with the inner wall surfaces of the manhole 11, the main pipe 12 and the mounting pipe 13 and smoothly perform the introduction work. 10 is the ground.
[0019]
As shown in FIG. 10, the rehabilitation pipe 1 introduced into the inside of the attachment pipe 13 is attached until the surface of the flange 2 comes into contact with the inner face of the main pipe 12 where the lower end of the attachment pipe 13 extends. It is drawn inside the tube 13.
[0020]
In addition, an adhesive layer 15 such as butylene rubber is provided in advance on the inner surface portion of the main pipe 12 to which the lower end of the attachment pipe 13 extends, and the surface of the flange 2 is adhered on the surface of the adhesive layer 15. At the same time or after that, the portion of the rehabilitating tube 1 on the side of the mounting jig 3 drawn out from the flange 14 at the upper end position of the mounting tube 13 is cut out by the cutting machine 17. Since this excision operation can be performed inside or outside the ridge 14, it can be easily performed.
[0021]
Next, as shown in FIG. 11, a packer 18 is introduced into the main pipe 12. The packer 18 includes a molding plate 19 having a molding projection 20 on the surface. The molded plate 19 is raised to extend the molded convex portion 20 into the rehabilitated tube 1 and press the surface of the formed plate 19 to expand the portion of the ridge 2 of the rehabilitated tube 1 adhered as described above. In addition to the diameter, the surface of the ridge 2 can be firmly fixed to the adhesive layer 15. At this time, the end portion 1 a of the rehabilitated tube 1 can be sealed with the molding plate 19 and the molding convex portion 20.
[0022]
Further, at the position of the ground 10 near the ridge 14, the heated gas generator 22 is delivered to the ground in place of the winch 16 and the cutting machine 17, and the heated gas pressure feed pipe 23 and the exhaust pipe 24 of the heated gas generator 22 are connected to the adapter 25. To the resection end of the rehabilitation tube 1 described above.
[0023]
Next, as shown in FIG. 12, the heating gas is pumped into the rehabilitation pipe 1 through the heating gas pumping pipe 23, so that the end 1 a is sealed with the molding plate 19 of the packer 18, and the heating is performed. The rehabilitation pipe 1 is softened and expanded by the heating action and pressure of the gas. Due to this expansion, the rehabilitation pipe 1 is attached to the inner wall surface 13 a of the attachment pipe 13.
[0024]
With the rehabilitated tube 1 stuck to the inner wall surface 13a of the mounting tube 13 in this way, the end of the rehabilitated tube 1 on the adapter 25 side is cut again, and the molded plate 19 is further lowered to eliminate the packer 18. Thus, the lining operation of the rehabilitation pipe 1 with respect to the attachment pipe 13 is completed. As shown in FIG. 13, the lining work is completed when the rehabilitation pipe 1 is fixed to the adhesive layer 15 at its end 1 a and is attached to the inner wall surface 13 a of the attachment pipe 13. can get.
[0025]
In the above-described embodiment, the case where the ridge 2 of the rehabilitation pipe 1 is directly attached to the inner wall surface of the main pipe 12 has been shown. However, when another rehabilitation pipe is provided in advance on the inner wall surface of the main pipe 12. Is provided on the surface of the rehabilitation pipe.
[0026]
<The form of the second practitioner>
Next, the lining method of the rehabilitation pipe with respect to the buried attachment pipe according to the second embodiment of the present invention will be described with reference to the drawings.
[0027]
In this embodiment, a plug is provided at one end 1a of the straightening tube 1. The rest of the configuration except for the stopper is the same as in the first embodiment, and the same parts are denoted by the same reference numerals and description thereof is omitted.
[0028]
That is, as shown in FIG. 14, an inflatable and balloonable balloon-like shape that expands to one end 1 a of the correction pipe 1 in a shape conforming to the inner wall surface portion of the main pipe 12 or the surface of the flange 2 of the correction pipe 1. A stopper 9 is provided. In addition, a stopper-like pulling jig 91 is attached to the other end 1 b of the rehabilitation pipe 1. The stopper 9 is connected to a drawing jig 91 through a pipe 92 so as not to be separated from the collar 2 (one end 1a) of the straightening pipe. The pipe 92 is led out to the outside through a pipe feed port (not shown) of the drawing jig 91, and an air compressor E is connected to the lead-out end. In this case, the pipe 92 is fixed to the drawing jig 91 by a fixing tool (not shown), and the hook 2 side portion can be pulled out through the pipe feed port by releasing the fixing tool. The air compressor E includes a supply port and a suction port (not shown).
[0029]
Here, an example of the lining method of the rehabilitation pipe | tube 1 with respect to the attachment pipe | tube 13 is demonstrated based on FIG. 14 thru | or FIG.
[0030]
First, the end of the wire 6 is locked in the hook hole at the tip of the mounting jig 3 by the hook 7 that has been guided from the side of the mounting pipe 13 to the manhole 11 through the main pipe 12 in advance, and the winch 16 is driven. The rehabilitation pipe 1 is pulled through the wire 6 and introduced from the manhole 11 through the main pipe 12 to the inside of the attachment pipe 13. At this time, the stopper 9 is in a contracted state, and is connected to the drawing jig 91 via the pipe 92 so as not to be separated from the flange 2 (one end 1a) of the straightening pipe 1. In this case, the pipe 92 is fixed to the drawing jig 91 by a fixing tool.
[0031]
Then, as shown in FIG. 14, the rehabilitation pipe 1 introduced into the attachment pipe 13 is attached to the attachment pipe 13 until the surface of the flange 2 is in contact with the inner surface of the main pipe 12 where the lower end of the attachment pipe 13 extends. Pull inside. At this time, a certain amount of air is injected into the stopper 9 so that the movement of the stopper 9 toward the one end 1b side of the flange 2 is restricted. It is designed to be held on the surface.
[0032]
Then, the surface of the reed tube 2 is attached to the surface of the adhesive layer 15 on the inner surface of the main tube 12 where the lower end of the mounting tube 13 extends, and the rehabilitation tube 1 pulled out from the reed 14 at the upper end position of the mounting tube 13 is attached. The part on the side of the tool 3 is cut out by the cutting machine 17. Next, instead of the winch 16 and the cutting machine 17, as shown in FIG. 15, the heated gas generator 22 and the air compressor E are delivered to the ground, and the heated gas pressure feed pipe 23 and the exhaust pipe 24 of the heated gas generator 22 are connected. The pipe 92 is connected to the supply port of the air compressor E through the adapter 25 while being connected to the cut end of the rehabilitation pipe 1 through the adapter 25. At this time, the pipe 92 is fixed to the adapter 25 by a fixing tool (not shown).
[0033]
Thereafter, compressed air from the air compressor E is supplied to the plug 9 through the pipe 92, and the plug 9 is expanded. As a result, the surface of the flange 2 is pressed against the inner surface of the main pipe 12 as the stopper 9 expands, and the surface of the flange 2 is firmly adhered onto the surface of the adhesive layer 15. Then, as shown in FIG. 16, by feeding the heated gas into the rehabilitating pipe 1 through the heated gas pressure feeding pipe 23, coupled with the fact that the end 1 a is sealed by the expansion of the plug 9, The rehabilitation pipe 1 is softened and expanded by the heating action and pressure. Due to this expansion, the rehabilitation pipe 1 is attached to the inner wall surface 13 a of the attachment pipe 13. At this time, the pressure of the compressed air in the plug 9 is set to be higher than the pressure of the heated gas in the correction pipe 1, and the plug 9 is connected to the end 1 a of the correction pipe 1 by the heated gas pressure in the correction pipe 1. To prevent it from coming off.
[0034]
Thereafter, as shown in FIG. 17, when the rehabilitation pipe 1 sticks to the inner wall surface 13a of the attachment pipe 13, the end of the rehabilitation pipe 1 on the adapter 25 side is cut off again, and the outlet end of the pipe 92 is connected to the air compressor E. And the plug 9 is contracted by sucking the compressed air in the plug 9. Then, the pipe 92 is wound up from the ground, and the stopper 9 is pulled out to the side of the ridge 14. Thereby, the lining operation | work of the renovated pipe 1 with respect to the attachment pipe 13 is completed.
[0035]
In this way, the stopper 9 provided on the flange 2 of the correction pipe 1 is recovered to the flange 14 side through the inner surface (attachment pipe 13) after the lining of the correction pipe 1, and the stopper 9 is recovered from the main pipe 12 through the manhole 11. The troublesome work to do can be abolished, and the lining work can be made more effective.
[0036]
【The invention's effect】
Since the present invention is renovated as described above, the following effects are exhibited. According to the lining method of the rehabilitating pipe with respect to the buried mounting pipe of the present invention, in particular, there is no need for operations such as excision and turning processing on the rehabilitating pipe inside the manhole, main pipe and mounting pipe. Pipe lining work can be performed easily and quickly.
[0037]
When the rehabilitation pipe is drawn into the attachment pipe by the wire, the rehabilitation pipe can be quickly introduced into the attachment pipe by a mechanical operation such as a winch only by handling the attachment pipe on the ground.
[0038]
In addition, when the heating gas is water vapor, the rehabilitation pipe can be softened and pressurized safely.
[0039]
In addition, an adhesive layer is provided in advance on the inner wall surface portion or the ridge surface of the main pipe, and the inner wall surface and the ridge surface of the main pipe are attached via this adhesive layer, thereby drawing the rehabilitation pipe to the heel side. By work, the end of the rehabilitation pipe can be fixed to the inner wall surface of the main pipe.
[0040]
In addition, a balloon-like stopper that can be expanded and contracted is provided at one end of the straightening pipe, and the stopper is inflated and stopped when the mounting pipe is lining, while the stopper is contracted via the pipe after the lining is completed. Thus, the troublesome work of recovering the stopper provided on the reed pipe through the manhole can be eliminated, and the lining work can be more effectively achieved.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view illustrating a processing state of a rehabilitating pipe in a method for lining a rehabilitating pipe with respect to an embedded mounting pipe according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view for explaining the pinch shape of the end portion of the rehabilitation pipe in the relining pipe lining method with respect to the buried mounting pipe.
FIG. 3 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 4 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 5 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 6 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 7 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 8 is a longitudinal sectional view for explaining another pinch shape of the end portion of the rehabilitation pipe in the lining method of the rehabilitation pipe with respect to the buried mounting pipe.
FIG. 9 is a longitudinal sectional view for explaining the state of induction of the rehabilitation pipe in the relining pipe lining method with respect to the buried mounting pipe.
FIG. 10 is a longitudinal sectional view for explaining a state of guiding the rehabilitation pipe into the attachment pipe in the relining pipe lining method with respect to the buried attachment pipe.
FIG. 11 is a longitudinal sectional view for explaining a processing state of the rehabilitated pipe guided into the mounting pipe in the relining pipe lining method for the buried mounting pipe.
FIG. 12 is a longitudinal sectional view for explaining a processing state of the rehabilitation pipe guided into the attachment pipe in the lining method of the rehabilitation pipe with respect to the buried attachment pipe.
FIG. 13 is a longitudinal sectional view for explaining the lining state of the rehabilitation pipe guided into the attachment pipe in the relining pipe lining method for the buried attachment pipe.
FIG. 14 is a longitudinal sectional view for explaining a state in which the rehabilitated pipe is guided into the mounting pipe in the lining method of the rehabilitating pipe with respect to the buried mounting pipe according to the second embodiment of the present invention.
FIG. 15 is a longitudinal sectional view for explaining a processing state of the rehabilitation pipe guided into the attachment pipe in the relining pipe lining method for the buried attachment pipe.
FIG. 16 is a longitudinal sectional view for explaining a processing state of the rehabilitated pipe guided into the mounting pipe in the lining method of the rehabilitated pipe with respect to the buried mounting pipe.
FIG. 17 is a longitudinal sectional view for explaining the lining state of the rehabilitation pipe guided into the attachment pipe in the relining pipe lining method for the buried attachment pipe.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rehabilitation pipe 1a End part 1b End part 1c-1i Pinch shape 2 鍔 3 Retraction jig 6 Wire 7 Hook 10 Ground 11 Manhole 12 Main pipe 13 Mounting pipe 13a Inner wall surface 14 桝 15 Adhesive layer 16 Winch 17 Cutting machine 18 Packer 19 Molded plate 20 Molded convex part 22 Heated gas generator 23 Heated gas pressure pipe 24 Exhaust pipe 25 Adapter 9 Plug 91 Retraction jig 92 Pipe

Claims (5)

A lining method of rehabilitating pipe with the inner surface of the mounting tube branched from the buried main pipe underground, forming a flange by flange machining on one end portion of the rehabilitating pipe, and pinch the other end state in the retracted jig is provided, until the rehabilitating pipe is pulled into the attachment tube through the main pipe from the manhole side through its retracted jig, the end portion of the other side of the rehabilitating pipe in桝側mounting tube end drawer, both pasted the rib surface at the lower end spans main portion of the mounting tube, the rehabilitation by pressurizing by feeding heated gas from桝側in sealing the flange side of the rehabilitating pipe, withdrawn in rehabilitating pipe A method of lining a rehabilitated pipe with respect to an embedded mounting pipe, wherein the pipe is expanded and cooled, the end of the rehabilitated pipe pulled out is cut, and the rehabilitated pipe is lined on the inner surface of the mounting pipe.   The method of lining a rehabilitating pipe with respect to an embedded mounting pipe according to claim 1, wherein a wire is attached to a drawing jig provided at the other end of the rehabilitating pipe, and the rehabilitating pipe is introduced into the mounting pipe by pulling the wire. .   The method for lining a rehabilitating pipe with respect to an embedded mounting pipe according to claim 1 or 2, wherein the heated gas is water vapor.   4. An adhesive layer made of butyl rubber or the like is provided on the inner wall surface portion of the main pipe extending over the lower end of the mounting pipe or the reed surface of the rehabilitated pipe, and the reed surface of the rehabilitated pipe is attached via this adhesive. Lining method for rehabilitated pipe with respect to the buried pipe. A lining method of rehabilitating pipe with the inner surface of the mounting tube branched from the buried main pipe underground, at one end of the calibration tube, to form a flange by flange machining, the inner wall portion of the main pipe or An inflatable balloon-like stopper that expands into a shape conforming to the rib surface of the correction pipe is provided, and the stopper is connected to the retraction jig provided with the other end of the rehabilitation pipe pinched. It is connected via a pipe so as not to leave the plug, and in a state where the stopper is contracted, the rehabilitation pipe is drawn from the manhole side through the main pipe through the retraction jig into the mounting pipe, pull the end portion of the other side to the桝側mounting tube end, said flange face both pasted to the lower end spans main portion of the mounting tube, causing the flange side of the plug of the rehabilitating pipe is supplied through the pipe The end of the rehabilitation pipe that has been inflated with gas, stoppered, and pulled out The rehabilitation pipe is expanded and cooled by sending heated gas from the heel side and pressurizing, and the rehabilitation pipe is lined on the inner surface of the mounting pipe, and the gas in the plug is discharged through the pipe. A method of lining a rehabilitating pipe with respect to an embedded mounting pipe, wherein the plug is pulled out to the heel side by contraction.

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