JPH09131791A - Repairing construction method of existing pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repairing, construction method, in which the inner peripheral surface is smoothly and uniformly hardened and high quality repairing effect, shortened execution term and reduced execution cost can be attained. SOLUTION: A repairing sleeve 20, which has thermosetting properties and included thermosetting resin containing photo-setting agent, is introduced in an existing pipeline 3. Further, by feeding compressed air, the repairing sleeve 20 is pressingly disposed in tension against the inner wall surface 3a of the existing pipeline. Under the state just mensioned above, the repairing sleeve 20 is thermally set to the state that the repairing sleeve 20 can retain its shape. After that, both the ends of the repairing sleeve 20 are cut off so as to be opened to man-holes 1 and 2 in order to photo-set the repairing sleeve 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing an existing pipeline such as a sewer pipe already installed.

[0002]

2. Description of the Related Art Generally, fume pipes, ceramic pipes and the like are widely used as sewer pipes buried underground. The inner peripheral surface of these conduits is eroded by hydrogen sulfide and other corrosive gases and deposits, and deteriorates and deteriorates in strength over a long period of use. In addition, cracks may occur in part of the pipeline due to ground pressure, ground subsidence, top load, etc., and groundwater, etc. may enter the pipeline from this part, or running water in the pipeline may leak into the ground. is there.

As a countermeasure against this, an uncured repair sleeve containing a thermosetting resin is introduced into an existing pipeline such as a sewer pipe while being reversed by fluid pressure such as compressed air or water pressure, or a repair sleeve is installed in a rope or the like. And introduce it along the inner wall surface of the pipe, press it with fluid pressure, and then heat the repair sleeve with a heating medium such as heating steam or hot water to harden the repair sleeve and then harden it. A method for repairing an existing pipeline that covers the inner wall surface of the pipeline has already been developed.

On the other hand, as another repairing method of the existing pipeline, repairing in an uncured state containing a thermosetting resin containing a photo-curing agent while inverting the existing pipeline with compressed air or by pulling with a rope or the like. Introducing a sleeve for
Press the fluid along with the inner wall surface of the pipeline by pressurizing it with compressed air, and then press the repair sleeve under pressure to irradiate it with an ultraviolet ray irradiation device to cure the repair sleeve and cure the inner wall surface of the pipeline. There is a repairing method that covers the surface with a cured sleeve.

[0005]

According to the conventional method for repairing an existing pipeline described above, a cured resin sleeve is formed along the inner wall surface of the pipeline, so that the pipeline may be deteriorated in strength or cracked. Even if the pipeline is partially damaged, the strength can be significantly improved, and it is possible to prevent the intrusion of groundwater into the pipeline through the cracked part and the leakage of water from the pipeline. Can be recovered.

However, in the former repairing method in which the above-mentioned repair sleeve is heat-cured, the inner wall surface of the pipeline being repaired by groundwater or the like intruding from cracks in the pipeline to be repaired buried in the ground. Since the outer peripheral surface of the uncured repair sleeve that has been stretched is cooled, it takes a long time to pressurize and heat the repair sleeve so that it can be sufficiently heat-cured from the inside to the outside. In addition, in order to evenly cure the repair sleeve over the entire length of the pipeline to be repaired, the pressurizing / heating work time takes a longer time, which causes a drastic decrease in work efficiency. Inconvenience such as increase in construction cost,
Due to insufficient curing due to insufficient heat curing time, etc., the cured sleeve covering the inner wall surface of the conduit may peel off from the inner wall surface of the conduit or may be deformed to improve the ability of the fluid in the conduit to flow down. There is a problem such as damage. In particular, as the diameter of the conduit increases when pressurizing and heat-curing a conduit having a large diameter, for example, a conduit having a diameter of 1 m or more, using a repair sleeve, the thickness of the repair sleeve used increases.
For example, since the thickness is 20 mm or more, the working time for pressurizing and heating for hardening the sleeve becomes further longer, which significantly increases the construction cost and makes the sleeve uniform over the entire length of the pipeline. There is a problem that it is hard to cure without being.

In the latter repairing method in which the repair sleeve is cured by irradiation with ultraviolet rays, the repair sleeve in the uncured state containing the thermosetting resin containing the photo-curing agent is pressed against the inner wall surface of the conduit. In order to cool the inside of the repair sleeve and avoid the local effect of heat generated from the ultraviolet irradiation device, it is necessary to supply compressed air into the repair sleeve during the entire curing process to generate an air flow. Since the UV irradiation is performed while moving the UV irradiation device in the same direction as the air flow, the heat generated by the UV irradiation device prior to the UV irradiation is located below the UV irradiation device in the air flow. Affect the parts of
After that, since the repair sleeve is cured by irradiation with ultraviolet rays, there is unevenness in the curing, and in combination with the movement of the ultraviolet irradiation device on the uncured sleeve, the inner peripheral surface of the sleeve is not formed smooth and uneven Wrinkles are generated, which causes an increase in resistance to the fluid flowing in the pipe and has a problem such as hindering smooth flow. Furthermore, softening and fluidization of the thermosetting resin due to the heat effect preceding the UV irradiation. As a result, the inner thin film of the repair sleeve hangs down, the ultraviolet irradiating device comes into contact with the hung down inner thin film, and the inner thin film ignites, which may cause a fire. Further, during the photo-curing work of the repair sleeve by the above-mentioned UV irradiation, the pressure inside the sleeve can be kept constant over the entire area of the repair target pipeline, and the temperature inside the repair sleeve does not rise above the set limit temperature. As described above, a large amount of compressed air must be sent into the sleeve over a long period of time, and in particular, a pipeline having a large diameter, for example, a pipeline having a diameter of 1 m or more is pressed and light-cured by a repair sleeve. In this case, there are problems such as pressurizing and photo-curing work that cannot be performed without using an air compressor with a large air supply capacity and problems such as the danger of work using an air compressor with a large air supply capacity. is there.

Therefore, an object of the present invention is to cure the repair sleeve evenly and uniformly, to shorten the working time and to reduce the working cost, and to finish the inner peripheral surface of the sleeve to be smooth so that the repair work can be performed. It is an object of the present invention to provide a method for repairing an existing pipeline that is safe and has a high-quality repair effect without the risk of fire or the like and pressurization / heating work for a long time.

[0009]

In order to achieve the above object, a method for repairing an existing pipeline according to the present invention is a tubular shape containing an uncured thermosetting resin containing a photo-curing agent introduced into the pipeline. Compressed air is supplied into the repair sleeve to press the repair sleeve against the inner wall surface of the conduit to stretch it, and the repair sleeve is heated and hardened to a state where it can maintain its own shape in a short time, and then pressed. -The heating work is stopped, the end of the repair sleeve is cut and opened, and the uncured region of the repair sleeve is photocured in an open state without pressure air cooling. The repair method is to supply compressed air into a tubular repair sleeve containing an uncured thermosetting resin containing a photo-curing agent to introduce the repair sleeve into the pipeline and to simultaneously form the inner wall surface of the pipeline. Pressing and tensioning, While supplying compressed air into the repair sleeve, heat and cure the repair sleeve in a short time to a state where it can maintain its self-shape, cutting and removing the end of the repair sleeve, and opening the end. And a step of photo-curing the opened uncured region of the repair sleeve in an open state without air cooling under pressure.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a repairing method for an existing pipeline according to the present invention will be described below with reference to FIGS.

In the figure, reference numerals 1 and 2 are manholes, reference numeral 3 is an existing pipeline that is buried in the ground to be repaired and is formed of a fume pipe, a ceramic pipe, etc., and a reference numeral 4 is from an adjacent pipeline. It is a water stopcock that prevents running water, etc.

[0012] At the time of construction, the pipe 3
The inner wall surface 3a is cleaned, and if necessary, the inner wall surface 3a is ground by a drilling machine or the like to adjust the shape.

Next, for example, when covering a pipe having a diameter of 700 mm or less with a repair sleeve, a flexible sleeve introducing device 5 is provided in one manhole 1 through a manhole support 6 as shown in FIG. The guide pipe 7 as an outlet side device is attached to the manhole 2 of FIG. The guide pipe may be raised in the manhole as shown in FIG. 1 or may be laid on the manhole bottom plate portion. The guide pipe 7 has a diameter corresponding to the diameter of the conduit 3.

Subsequently, as shown in FIG. 2, the repair sleeve 20 in an uncured state is expanded from the outlet portion 5a of the introduction side device 5 while being sequentially inverted by compressed air supplied from the introduction side device 5 and expanded. From the one end 3b to the other end 3c, the inner wall surface 3a of the conduit 3 is pressed and stretched, and further brought to the end portion 7a of the guide pipe 7 as shown in FIG. A bobbin 8 that discharges a part of the compressed air supplied into the repair sleeve 20 to the outside and forms an air flow in the direction of arrow A is provided at the tip 20a of the repair sleeve 20.

As shown in the partially broken explanatory view of FIG. 7, the repairing sleeve 20 comprises one layer of a cylindrical base material made of reinforcing fibers such as glass fibers and polyester fibers, or a plurality of laminated layers corresponding to the required strength. In the present embodiment, a resin layer 24 formed by impregnating two layers of base materials 21 and 22 with an uncured thermosetting resin 23 containing a photo-curing agent, for example, an unsaturated polyester resin, and the resin layer An inner thin film 25 such as a plastic thin film covering the inner surface of 24, for example, a synthetic thin film of polyurethane / polyamide or a polyethylene film
And

The base materials 21 and 22 made of reinforcing fibers are
For example, as shown in FIG. 7, a plurality of fiber bundles arranged obliquely with respect to the circumferential direction have a tubular shape in which they are woven so as to cross each other,
1.3 to 1.5 times in the circumferential direction, that is, 130 to 150
When the compressed air supplied to the inside of the sleeve 20 presses against the inner wall surface 3a of the conduit, the outer periphery of the inner wall of the conduit extends in the circumferential direction and follows the shape of the inner wall surface 3a of the conduit. The inner wall surface 3a of 3 is closely attached.

Next, a heating device (not shown) is operated to gradually heat the compressed air from the room temperature state, for example, 60 to
The compressed air heated up to 100 ° C. and heated from the introduction side device 5 is supplied into the repair sleeve 20 stretched on the inner wall surface 3 a of the conduit 3 to heat the repair sleeve 20. When the repairing sleeve 20 is heated, the curable resin 25 in the resin layer 24 is exposed to heated compressed air.
It is cured from side to side, ie from the inside to the outside.

The extent to which the resin layer 24 can maintain the shape in which the repair sleeve 20 is stretched on the inner wall surface 3a of the conduit can be maintained by the sleeve itself, for example, the oblique line in FIG. 4 showing the cross section taken along the line BB in FIG. After the region a, that is, the thickness dimension range of 1/4 to 1/3 of the resin layer 24 from the side of the inner thin film 26 is hardened, the supply of the heated compressed air into the repair sleeve 20 is stopped to stop the sleeve 20. Stop the heat curing work.

Subsequently, both ends of the repairing sleeve 20, which is hardened in a predetermined area a capable of maintaining its own shape from the inner surface over the entire circumference, are cut off to cut off the parts protruding into the manholes 1 and 2, and the introducing device 5 and Remove the introduction pipe 7.

Next, as shown in FIG. 5, both ends are opened into the manholes 1 and 2, respectively, and the inner peripheral surface of the resin layer 24 is hardened to have a thickness within a predetermined range so that the shape of the repair sleeve is self-maintained. The ultraviolet irradiation device 10 is introduced into one of the manholes 20 such as the manhole 1, and the ultraviolet irradiation device 10 is operated under a natural ventilation condition in which both ends are open, and the rope 11 having one end connected to the ultraviolet irradiation device 10 is inserted. Tow,
Or you can use a self-propelled UV irradiation device to
The ultraviolet ray from the ultraviolet lamp 10a is irradiated while moving in the direction to move the curable resin 23 in the uncured region of the resin layer 24.
Is cured, and the inner wall surface 3a of the conduit 3 is covered with the cured repair sleeve 20. The curing process by the ultraviolet irradiation device 10 is excellent in workability because the both ends of the repair sleeve 20 are opened and the supply of compressed air is stopped, so to speak, that the workability is excellent, and the resin layer 24 covering the inner wall surface 3a is So-called high-strength reinforced plastic (FRP) reinforced by base materials 21, 22 such as glass fibers.
Next, a strong reinforcement of the conduit 3 can be obtained.

Thereafter, as shown in FIG. 6, both ends of the conduit 3 and the repair sleeve 20 exposed in the manholes 1 and 2 are covered with a thermosetting resin 26 from the manholes 1 and 2 side, and an ultraviolet irradiation device is provided. 10 and other devices are removed, and the repair of the pipeline 3 is completed.

In the above description, the inner peripheral surface of the repair sleeve 20 is heated and hardened by the compressed air that has been heated, but it is also possible to heat and harden it by other heating means, and the repair sleeve can be supplied by compressed air. The case of applying it to the so-called inversion method where it is inverted and introduced into the pipeline was explained, but after introducing the repair sleeve into the pipeline with a rope etc. and introducing it, the repair sleeve is supplied to the inner circumference of the pipeline by supplying compressed air. It can also be applied to a so-called pull-in introduction method in which the surface is pressed and stretched.

The sleeve 20 formed in this manner is excellent in the transparency of the ultraviolet rays to be radiated, so that the resin layer 24 is uniformly and easily cured from the inner circumference to the outer circumference, and is repaired by being stretched in the conduit 3. The both ends of the working sleeve 20 are opened in the manholes 1 and 2, respectively, and the repair sleeve 20 including the curable resin 23 is irradiated with ultraviolet rays by the ultraviolet ray irradiation device 10 that moves under the condition of good natural ventilation, and the uncured area is uncured. Since the resin is cured, the sleeve 20 is prevented from being thermally affected by the heat generated by the ultraviolet irradiation device 10 prior to the curing of the sleeve 20 by the ultraviolet irradiation, and the ultraviolet irradiation device moves in the sleeve whose inner peripheral surface is cured. Therefore, a cured repair sleeve 20 having a smooth inner peripheral surface without unevenness is obtained, and the frictional resistance against running water flowing in the pipe 3 is reduced. It is possible to reduce the number of pipes, to obtain a pipeline with a high ability to flow down, to avoid a fire caused by ignition due to contact with the ultraviolet irradiation device 10 caused by the drooping of the inner thin film, and to supply compressed air between ultraviolet irradiations. Combined with the excellent workability and simplification, the construction period and construction cost can be shortened.

Next, the case of repairing a relatively large diameter pipe having a diameter of 600 to 800 mm or more will be described with reference to FIGS.

In the figure, reference numeral 33 is a pipeline buried in the ground to be repaired, and both ends of the pipeline 33 are manholes 3 respectively.
Open in 1 and 32. At the time of construction, the inner wall surface 33a of the pipe line 33 is washed with a pipe cleaning vehicle in the same manner as described above, and the inner wall face 33a is shaved by a drilling machine or the like, if necessary,
Adjust the shape.

Next, the uncured repair sleeve 40 reaching from the one manhole 31 to the other manhole 32 is drawn in by a rope or the like, or is introduced into the conduit while being sequentially reversed by fluid pressure, for example, compressed air or water pressure. It is introduced into the conduit 33 by an appropriate means such as an inversion method.

This repair sleeve 40, like the repair sleeve 20, has one layer or a plurality of cylindrical base materials made of reinforcing fibers such as glass fiber and polyester fiber, or two or more layered in accordance with the required strength. Layer base material 41,
An uncured thermosetting resin 4 containing a photo-curing agent 42
3. A resin layer 44 formed by impregnating an unsaturated polyester resin, for example, and a plastic thin film covering the inner surface of the resin layer 44, for example, an inner thin film 45 such as a polyurethane polyamide synthetic thin film or a polyethylene film. .

The base materials 41 and 42 made of reinforcing fibers are cylindrical in shape, like the base materials 21 and 22, in which a plurality of fiber bundles arranged obliquely with respect to the circumferential direction are woven so as to cross each other. , 1.3 to 1.5 times the circumferential direction, that is, 1
The sleeve 40 is made to be stretchable by 30 to 150%
When the inner wall surface 33a of the conduit is pressed by compressed air or the like supplied inside, the outer periphery of the inner wall surface 33a extends in the circumferential direction and follows the shape of the inner wall surface 33a of the conduit to come into close contact with the inner wall surface 33a of the conduit. There is.

Next, the base end side fixing jig 50 is attached to one end of the repair sleeve 40, which is introduced into the conduit 33, protruding into the manhole, for example, the end 40a protruding into the manhole 31, and the other end. End 40 protruding into the manhole 32 of
The front end side fixing jig 55 is fitted to b and is wound and fastened by a band-shaped or string-shaped fixing device 56.

The base end side fixing jig 50 and the tip end side fixing jig 55 are made of metal and have a bottomed cylindrical shape, and are pressurized by compressed air supplied from the base side fixing jig 50 side. The repair sleeve 40 is expanded to expand the inner wall surface 33a of the conduit 33.
Press along. Since the repair sleeve 40 is expandable in the circumferential direction, it is deformed following the inner wall surface 33a of the conduit,
It adheres to the inner wall surface 33a. The compressed air is supplied into the repair sleeve 40 by an air pressure feeding device 52 arranged on the ground through a supply pipe 51 arranged in the manhole 31. The base end side fixing jig 50 and the tip end side fixing jig 55 discharge a part of the compressed air supplied into the repair sleeve 40 to the outside and form a bobbin 50.
a and 55a are provided respectively.

The repair sleeve 40 is pushed open to expand the conduit 33.
After pressing and stretching the inner wall surface 33a, the heating device 53 provided in the middle of the supply pipe 51 is operated to gradually heat the compressed air from the normal temperature state, for example, to 60 to 100 ° C. The compressed air heated from the base end side fixing jig 50 is supplied into the repair sleeve 40 to heat the repair sleeve 40. The repair sleeve 40 is sequentially cured from the inside to the outside by heating.

Then, the repair sleeve 40 is attached to the inner wall surface 3 of the conduit.
3a to the extent that the shape stretched on itself can be self-maintained, for example, a shaded area b in FIG. 9 showing a cross section taken along the line CC of FIG. After the thickness dimension range is hardened, the supply of the heated compressed air into the repair sleeve 40 is stopped to stop the heat hardening operation of the sleeve 40.

Subsequently, both ends of the repair sleeve 40, which are hardened in a predetermined region b capable of maintaining a self-shape from the inner peripheral surface over the entire circumference, are cut and removed to remove both ends as shown in FIG. Is opened in the manholes 31 and 32, and the proximal end side fixing jig 50, the distal end side fixing jig 55 and the like are removed.

Next, as shown in FIG. 11, the ultraviolet irradiation device 60 is introduced from one manhole, for example, the manhole 31, into the repair sleeve 40 whose inner peripheral surface is hardened by a predetermined thickness dimension to maintain its shape. , Both ends are manholes 31,
The ultraviolet irradiation device 60 is operated under the condition of natural ventilation opened in 32, and the rope 65 whose one end is connected to the ultraviolet irradiation device 60 is pulled, or the self-propelled ultraviolet irradiation device moves to the other manhole 32 direction. The cured resin 4 in the uncured region of the resin layer 44 is irradiated with ultraviolet rays while moving.
Harden 3.

When the pipe 33 to be repaired has a relatively large diameter as in the present embodiment, the ultraviolet lamps 10a are arranged in a plurality of rows along the pipe axis as in the ultraviolet irradiator 10. In the apparatus, since the repair sleeve 40 and the ultraviolet lamp are largely separated from each other, the irradiation energy for curing the repair sleeve may be insufficient.

Therefore, the ultraviolet irradiation device 60 used in this embodiment is shown in FIG. 11 and the sectional view taken along the line DD in FIG.
As shown in FIG. 6, a cylindrical frame 6 movably supported on the inner peripheral surface of the repair sleeve 40 by a plurality of support legs 61.
2, a plurality of, for example, 16 ultraviolet lamps 63 are arranged radially and in a zigzag pattern along the outer periphery of the frame 62, and the ultraviolet lamps 63 and the repair sleeve 40 are arranged close to each other for repair. Ensuring sufficient irradiation energy to cure the sleeve.

Thereafter, as shown in FIG. 13, both ends of the conduit 33 and the repair sleeve 40 exposed in the manholes 31 and 32 are exposed to the thermosetting resin 3 from the manholes 31 and 32 side.
6 and the ultraviolet irradiation device 60 and other devices are removed, and the repair of the conduit 33 is completed.

In the above description, the inner peripheral surface of the repair sleeve 40 is heat-cured by the heated compressed air, but it may be heat-cured by other heating means.

The inner wall surface 33 of the conduit formed in this way
The sleeve 40 covering a is made of a so-called high-strength reinforced plastic reinforced by base materials 41 and 42 such as glass fibers, and has excellent transparency to ultraviolet rays irradiating the sleeve, and both ends of the repair sleeve 40 are Since the uncured area is photo-cured under the condition of open natural ventilation, it is uniformly cured from the inner circumference to the outer circumference over the entire length of the sleeve without being affected by the heat generated by the UV irradiation device. Sufficient reinforcement of the conduit 33 is obtained. Moreover, in combination with moving the ultraviolet irradiation device in the sleeve whose inner peripheral surface has already been hardened, a smooth inner peripheral surface repair sleeve 40 having no irregularities is obtained, and a high-quality repair conduit having a high downflow capability is obtained. Is obtained.

On the other hand, in spite of repairing a large-diameter conduit, the supply of compressed air presses the repair sleeve 40 against the inner wall surface 33a of the conduit and heat-cures it to such an extent that the self-shape can be maintained. A short time is sufficient, it is free from the danger of working under pressure and heating for a long time like the conventional repair construction method, it is excellent in safety and workability, and an air compressor with a large air supply capacity etc. It is not necessary to use the above equipment, the work can be simplified, the construction time can be shortened, and the construction cost can be reduced.

[0041]

According to the method for repairing an existing pipeline according to the present invention described above, the compressed air supplied into the repairing sleeve containing the thermosetting resin containing the photo-curing agent introduced into the existing pipeline is used. With the repair sleeve pressed against the inner wall surface of the existing pipeline and stretched, the repair sleeve is heated and cured to a state where it can maintain its own shape, and then the sleeve is exposed to light with natural ventilation with the end of the sleeve open. It is a very short time in the initial stage where the compressed air supply into the sleeve is cured to the extent that it can maintain its self-shape after being cured, and the inside of the sleeve with its rear end opened is under natural ventilation. The repair sleeve is cured by UV irradiation, and the repair sleeve is thermally affected by the heat generated by the UV irradiation device before the repair sleeve is cured by UV irradiation. High-quality repair effect without hardening, uniform hardening and no unevenness on the inner peripheral surface, no risk of fire, simplification of construction work and reduction of construction time, resulting in reduction of construction cost It is a great contribution to the repairing method of existing pipelines.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a method for repairing an existing pipeline according to the present invention.

FIG. 2 is likewise an explanatory view of the repairing method of the present embodiment.

FIG. 3 is likewise an explanatory view of the repairing method of the present embodiment.

FIG. 4 is likewise an explanatory view of a repairing method according to the present embodiment.

FIG. 5 is also an explanatory diagram of a repairing method according to the present embodiment.

FIG. 6 is likewise an explanatory view of the repairing method of the present embodiment.

FIG. 7 is a partially cutaway explanatory view of a sleeve used in the repairing method of the present embodiment as well.

FIG. 8 is an explanatory diagram showing another embodiment of a repairing method for an existing pipeline according to the present invention.

FIG. 9 is likewise an explanatory view of the repairing method of the present embodiment.

FIG. 10 is also an explanatory diagram of a repairing method according to the present embodiment.

FIG. 11 is also an explanatory diagram of a repairing method according to the present embodiment.

FIG. 12 is also an explanatory diagram of a repairing method according to the present embodiment.

FIG. 13 is also an explanatory diagram of a repairing method according to the present embodiment.

[Explanation of symbols]

 3 Existing pipeline 3a Inner wall surface 10 Ultraviolet irradiation device 20 Repair sleeve 21,22 Base material 23 Curable resin 24 Resin layer 25 Inner thin film 33 Existing pipeline 33a Inner wall surface 40 Repair sleeve 41, 42 Base material 43 Curable resin 44 resin layer 45 inner thin film 60 ultraviolet irradiation device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29K 105: 24

Claims (6)

[Claims] 1. Compressed air is supplied into a tubular repair sleeve containing an uncured thermosetting resin containing a photo-curing agent introduced into the conduit, and the repair sleeve is provided with the repair sleeve. A method for repairing an existing pipeline, which is characterized in that the repair sleeve is heated and hardened so that it can maintain its self-shape, and then the end of the repair sleeve is opened and the repair sleeve is photo-cured. . 2. A step of introducing a tubular repair sleeve containing an uncured thermosetting resin containing a photo-curing agent into a pipeline, and supplying compressed air into the repair sleeve for repair. Pressing the sleeve for use against the inner wall surface of the pipeline to stretch it,
The process of heating and curing the repair sleeve while maintaining compressed air while supplying compressed air into the repair sleeve, the process of cutting and removing the end of the repair sleeve to open it, and the process of opening the end A method for repairing an existing pipeline, comprising a step of photo-curing the sleeve. 3. A compressed air is supplied into a tubular repair sleeve containing an uncured thermosetting resin containing a photo-curing agent to introduce the repair sleeve into the pipeline and at the same time, into the pipeline. Steps of pressing against the wall surface to stretch it, steps of heating and curing the repair sleeve while maintaining compressed air while supplying compressed air into the repair sleeve, and cutting and removing the end of the repair sleeve to open it. A method of repairing an existing pipeline, which comprises a step and a step of photo-curing the repair sleeve having an open end. 4. The method for repairing an existing pipeline according to claim 1, wherein the photo-curing is performed by irradiation with ultraviolet rays from an ultraviolet irradiation device that moves in the repair sleeve. 5. The repair sleeve is made of reinforcing fiber,
And a resin layer made of a thermosetting resin containing a tubular base material in which a plurality of fiber bundles arranged obliquely with respect to the circumferential direction cross each other and knitted, and a photocuring agent impregnated in the base material The method for repairing an existing pipeline according to any one of claims 1 to 4, further comprising: 6. The thermosetting resin containing a photo-curing agent is an unsaturated polyester-based resin.
Method for repairing existing pipelines as described in Section 3.