JP2002144428A - Method for repairing underground tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for repairing an underground tube capable of shortening a time required for a repairing work and always obtaining a lined structure of a prescribed quality. SOLUTION: The method for repairing the underground tube comprises the steps of inverting a film-like element 1 having a thermal hose 11 mounted at a rear end in a cylindrical member 3 in a factory, and thus previously inserting the hose into the member 3. The method further comprises the step of drawing the member 3 into a sewage tube 5 together with the element 1. The method also comprises the steps of filling water from a rear end 1b in the element 1, and thereafter supplying a heated water from the hose 11 into the element 1 to cure a thermosetting synthetic resin in the member 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground pipe repair method for repairing an underground pipe such as a sewer pipe from the inside, and an inverted arrangement apparatus used in the method.

[0002]

2. Description of the Related Art In the event that a main body of an underground pipe such as a sewer pipe is cracked or a connection part is displaced due to aging, an earthquake, land subsidence, etc., the cracked part or the connection part is repaired immediately. Must. Increased infiltration of rainwater and groundwater imposes a heavy burden on treatment facilities such as sewage, and seepage of sewage into the ground causes pollution.

Therefore, as a method of repairing an underground pipe without excavating the ground, a method shown in FIGS. 13 and 14 is adopted.

In this repair method, first, a tubular body A containing an uncured thermosetting synthetic resin is drawn into an underground pipe B. Next, a bag-shaped water-impermeable membrane C is inserted into the tubular body A from the opening of the tubular body A while being inverted by water pressure (see an arrow) (FIG. 13). When the film C is inverted to the rear end portion D and the tube A is pressed against the inner surface of the underground pipe B over substantially the entire length, the water in the film C is heated, and the tube A is heated. The thermosetting synthetic resin of A is cured (FIG. 14). Thereafter, the water in the membrane C is recovered, and the tubular body A and the membrane C are cut at both ends of the underground pipe B to complete the repair.

[0005] The membrane may be extracted before cutting, but in this case, it constitutes a part of the lining structure as an inner impermeable layer.

[0006]

However, in this repair method, the underground pipe must be kept unused for a long time until the repair is completed. Also, at the repair work site, the water pressure management for reversal is complicated, and it is very difficult to always maintain a constant water pressure. Therefore, it is difficult to provide a uniform quality lining structure with this repair method.

Accordingly, an object of the present invention is to provide a method of repairing an underground pipe capable of shortening the time required for repair work and obtaining a lining structure of a constant quality, and a reversing arrangement apparatus which can be used in this method. And

[0008]

In order to achieve this object, a method of repairing an underground pipe according to the present invention comprises drawing a tubular body containing an uncured curable synthetic resin into an underground pipe, and removing the impervious pipe. An underground pipe that repairs the entire inner surface of the underground pipe or over a long range by applying fluid pressure to the inside of this tubular body through the film-like body, curing the curable synthetic resin and lining the same. In the repairing method, the membrane is turned upside down in the tubular body, and the tubular body is drawn into the underground pipe together with the membrane.

This means is particularly effective when the tubular body is provided with a water-impermeable layer outside the resin absorbing layer containing the curable synthetic resin (on the inner surface side of the underground pipe).

By evacuating the air inside the film-like body, it is possible to achieve a further excellent effect.

When the curable synthetic resin is thermosetting, a thermo hose is attached to the rear end of the film (in a state before the reversal), and then the film is inverted into a cylindrical body. It is preferable to arrange them.

Further, the reversing arrangement apparatus of the present invention has a pressure-sensitive port having an insertion port for an impermeable membrane at the rear end and a mounting port for fixing the tip of the membrane at the tip. It comprises a container and a support device for supporting a cylindrical body containing an uncured curable synthetic resin such that a film-like body extending while being inverted is arranged inside. Therefore, the inverted arrangement apparatus of the present invention is particularly suitable for use in performing the underground pipe repair method of the present invention.

[0013] The mounting port may be configured to also serve as a supporting device.

[0014]

Since the membrane is placed in the tubular body in advance, the step of inverting the membrane and inserting it into the tubular body at the repair work site is eliminated.

Further, by using the means of inversion, it is possible to form a tubular body containing a curable synthetic resin before disposing the film-like body.

If the air inside the membrane is evacuated, the cylinder and the membrane can be folded compactly or rolled. Further, when water for pressing against the inner surface of the underground pipe is poured into the film-like body, a large amount of air does not remain on the upper side of the water to form an air pocket.

If a thermo hose is attached to the rear end of the membrane, the thermo hose is also arranged when the membrane is turned upside down in the tubular body.

When the inside of the pressure vessel of the reversing arrangement device is pressurized, the film-like body is reversed from the front end side, and is disposed in the cylindrical body supported by the mounting port or other supporting device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a bag-like film 1 containing an uncured curable synthetic resin is previously set in a factory by reversing means.
Is inserted into the sewage pipe 5 (underground pipe) and arranged.

A hydraulic tower 9 is provided in the manhole 7, and a rear end 3a of the tubular body 3 is attached to a lower end 9a of the hydraulic tower 9. The membrane 1 is formed to be longer than the tubular body 3, and a rear portion 1 a of the membrane 1 extending outward from the rear end 3 a of the tubular body 3 is passed through the hydraulic tower 9. Has become. Upper end 9b of hydraulic tower 9
Is open in the shape of a bosh, and the rear end 1b of the membrane 1 is attached to the periphery of the upper end 9b.

Incidentally, it is also possible to form the film-like body 1 to the same length as the cylindrical body 3 and to attach the rear end thereof to the lower end 9a of the hydraulic tower 9 in a watertight manner.

The film body 1 has a thermo hose 11 at its rear end 1c.
Are connected and inserted into the tubular body 3 in the factory, so that the thermo hose 11 is arranged in the membrane-like body 1.

It is preferable to connect the film 1 and the tube 3 in advance so that the film 1 does not shift with respect to the tube 3 during the work on the construction site.

Then, water is poured into the membrane 1 from the rear end 1b, and the tubular body 3 is pressed against the inner surface of the sewer pipe 5 through the membrane 1 as shown in FIG. In this state, a suction hose 13 is placed in the water in the film 1 and water is sucked from the suction hose 13 and heated by a boiler (not shown). The heated water is again supplied from the thermo hose 11 to the film 1.
(See arrow), and the thermosetting synthetic resin in the tubular body 3 is cured.

In some cases, air or steam may be used instead of water.

Waiting for the thermosetting synthetic resin to cure, the water in the film 1 is sucked up and drained, and then the tubular 3
In addition, the cutting process and the recovery of the thermo hose 11 at both ends of the sewer pipe 5 of the membrane 1 are performed to form a lining structure as shown in FIG. 3, and the repair of the entire sewer pipe 5 is completed. The connecting portion 15 of the drain pipe 5 whose sealing function has been reduced is repaired by the tubular body 3 and the membrane body 1.

The film 1 may be finally removed in some cases.

FIG. 4 is a diagram for explaining an embodiment in which a hydraulic tower is not used.

After the bag-like membrane 1 'is inserted into the cylinder 3' by the reversing means, the tubular body 3 'and the membrane 1' are inserted.
(In this case, the rear end of the membrane 1 'is cut). A supply hose 20 is attached to the stopper 16, and a discharge hose 2 is attached to the stopper 18.
2 are installed. Then, the tubular body 3 'and the membrane-like body 1' are drawn into the sewer pipe 5, water is supplied from the supply hose 20, and the tubular body 3 'is pressed against the inner surface of the sewer pipe 5.
In this state, a valve (not shown) provided on the stopper 18 is opened, water is discharged from the discharge hose 22, and heated by a boiler (not shown). The heated water is supplied again from the supply hose 20 to cure the thermosetting synthetic resin in the cylindrical body 3 '.

The supply hose 20 and the discharge hose 22
May be installed at the repair work site. In some cases, air or steam is used instead of water.

FIG. 5 is a view for explaining another embodiment in which a hydraulic tower is not used.

The film-like body 1 "is placed inside the cylindrical body 3" and the rear end 1c '.
After the thermo hose 11 'is connected to the cylindrical body 3 "and inserted by the reversing means, the stopper 29 is attached to the opening of the tubular body 3" and the membrane 1 ". A thermo hose 11 ′, a supply hose 24, and a discharge hose 26 are attached to the stopper 29. The tubular body 3 ″ and the membrane body 1 ″ are drawn into the drain 5, and water is supplied from the supply hose 24 through the thermo hose 11 ′. Thereafter, the water is discharged from the discharge hose 26, heated by a boiler (not shown), and the heated water is supplied again from the thermo hose 11 '(see arrow).

As shown in detail in FIG. 6, the cylindrical body 3, 3 ', 3 "is made of a fiber layer 17 made of glass fiber, polyester fiber or the like.
A water-impermeable film layer 19 made of polyethylene, polyurethane or nylon is provided outside the (resin absorbing layer). The fiber layer 17 is made of a thermosetting synthetic resin such as an unsaturated polyester resin or an epoxy resin. Impregnated in the state. Although a thermosetting resin was used as the curable synthetic resin, it is also possible to use a room temperature curable or ultraviolet curable resin in the case shown in FIG. Water and air to press against the inner surface of the water pipe 5,
Steam can also be used in combination.

Each of the membranes 1, 1 ', 1 "is an impermeable film made of polyethylene, polyurethane or nylon, and has a fiber layer 2 made of glass fiber, polyester fiber or the like inside.
1 is additionally formed so that the film-like bodies 1, 1 ', 1 "are inside the tubular bodies 3, 3', 3" in the factory as shown in FIG. The fiber layer 21 is inserted while being inverted so as to be in contact with the fiber layer 21. Membranes 1, 1 ',
To reverse 1 ", the pressure of water or air, or in some cases, the pressure of a fluid such as water and air may be used, but the reversing tool 23 shown in FIG. 7 is advanced by a cylinder (not shown) and bent. The part 25 may be pushed by the tip annular body 27 (see the phantom line in FIG. 6).

When utilizing the pressure of a fluid, an inversion arrangement device shown in FIG. 8 is used.

A slit-shaped insertion port 30 is provided at the rear end of the pressure vessel 28 of the reversing arrangement apparatus installed in the factory, and a mounting port 33 is formed at the front end 32. An impermeable membrane 1, 1 ″ is folded and accommodated in an accommodation chamber 34 formed behind the pressure vessel 28, and the leading end of the membrane 1, 1 ″ is inserted through the insertion port 30. It is inserted into the pressure vessel 28 and reaches the mounting port 33. A fixing device 35 is formed outside the mounting opening 33, and the tip of the film-like body 1, 1 ″ is folded back outside the mounting opening 33, and the cylindrical body 3 containing an uncured thermosetting synthetic resin is formed.
After covering the rear end of the 3 ", the bolt 37 of the fixing device 35 is tightened. By the tightening of the bolt 37, the annular tightening member 39 of the fixing device 35 causes the front end of the membrane 1, 1" and the cylindrical body 3, 3 to be fastened. "The rear end is fixed to the mounting opening 33.

A supply port 41 formed in the pressure vessel 28
When the pressurized fluid is supplied into the pressure vessel 28 from above, the membrane 1, 1 "is inverted from the tip side and inserted into the tubular 3, 3". Thermo hose 1 at the rear end of the membrane 1,1 "
1, 11 'is attached, this thermo hose 1
1, 11 'is the film-like body 1, 1 "when the film-like body 1, 1" is invertedly inserted.
1 "at the same time.

In the accommodation chamber 34 behind the pressure vessel 28, speed adjusting rollers 43, 45 are also provided. The speed adjusting roller 43 is rotated at a predetermined speed by a motor 47, and the film-shaped members 1, 1 " Since the feeding speed of the hoses 11 and 11 'is regulated, the reversing speed of the membranes 1 and 1 "does not become too high.

A rubber sealing member 49 is attached to the inside of the insertion port 30. The sealing member 49 is in close contact with the membranes 1 and 1 "and then with the thermo hoses 11 and 11 '. Is prevented from leaking from the insertion port 30.

The distal end 32 of the pressure vessel 28 can be replaced by removing the mounting ring 51, so that the
A mounting port corresponding to a diameter of 1 "can be prepared.
In the figure, reference numeral 53 denotes a film-like body 1, 1 "and a thermo hose 1
55, supporting rollers for preventing 1, 11 'from hanging down
Is a mounting table for the film-like bodies 1, 1 "and the thermo hoses 11, 11 '.

When the method shown in FIG. 4 is carried out using this reversing arrangement device, no thermo hose is attached to the rear end of the film 1 '. When the method shown in FIG. 1 is carried out, the rear end side of the tubular body 3 is slightly cut off after the film body 1 is inserted upside down.

Fiber layer 2 formed on film-like bodies 1, 1 ', 1 "
1 is not initially impregnated with a synthetic resin,
When inserted into 3 ′, 3 ″, the thermosetting synthetic resin is absorbed from the fiber layer 17. The fiber layer 21 may contain some thermosetting synthetic resin. As shown in FIG. 9, a fiber layer may not be added to the shapes 1, 1 ', 1 ". Further, the film-like bodies 1 ', 1 "
As in the case of, it may be finally removed.

After inserting the membrane 1 'into the tubular body 3' or after inserting the membrane 1 'into the tubular body 3', the plugs 16 and 1 are inserted.
After the attachment of the film 8, unlike the case of FIGS. 1, 4 and 5, if the air in the film 1, 1 ′, 1 ″ is evacuated, as shown in FIGS. , 1 ', 1 "and the cylindrical bodies 3, 3', 3" can be compactly wound or folded, so that the transportation work to the repair work site is extremely easy. Since the shape is not necessarily circular, the cylindrical body 3,
Normally, water, which is an incompressible fluid, is used to press the 3 ', 3 ", but if air in the membranes 1, 1', 1" is evacuated, as shown in FIG. Air pool 31 does not occur, and the entire circumference of film-like body 1, 1 ', 1 "comes into contact with water.
Curing of the thermosetting synthetic resin in 3 ', 3 "proceeds equally in all parts.

Here, the plug 29 is attached to the opening of the tubular body 3 "and the membrane 1" at the construction site.

[0046]

As described above, by using the repair method of the present invention, the repair work can be completed in a short time, and the quality of the lining structure can be prevented from being varied.

Further, since it becomes possible to form a tubular body containing a curable synthetic resin prior to disposing the film-like body, the tubular body is preferably provided with a water-impermeable layer outside. In the case of having, the formation of the cylindrical body and the arrangement of the film-like body are performed simultaneously, and then the curable synthetic resin is sufficiently and uniformly contained as compared with the means for including the curable synthetic resin. As a result, the quality of the tubular body and thus the lining structure can be improved.

If the air inside the membrane is released, the cylinder and the membrane can be folded compactly or rolled, so that they can be transported to the repair work site very easily. It is possible, and also put water in the membrane,
When lining by curing thermosetting synthetic resin,
Since the cured state of the thermosetting synthetic resin can be prevented from being partially different, a lining structure of excellent quality can be provided.

If the thermo-hose is attached to the rear end and the film is turned upside down, a special process for arranging the thermo-hose becomes unnecessary, and the film is used by the thermo-hose when the thermo-hose is arranged. There is no danger of damage.

The reversing arrangement apparatus of the present invention arranges the membrane in a cylindrical body by inverting the membrane. However, if the mounting opening also serves as a support device, the membrane can be securely and reliably replaced with a simple structure. It becomes possible to arrange in a shape.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a tubular body and a membrane-like body are drawn into a sewer pipe in the underground pipe repair method according to the present invention.

FIG. 2 is a diagram showing a state in which water pressure is applied to a film-shaped body to supply heated water.

FIG. 3 is a diagram showing a state in which repair work has been completed.

FIG. 4 is a diagram for explaining an embodiment in which a hydraulic tower is not used.

FIG. 5 is a diagram illustrating another embodiment in which a hydraulic tower is not used.

FIG. 6 is a view conceptually showing a state in which the membrane is inverted and inserted into the tubular body.

FIG. 7 is a perspective view of a reversing tool.

FIG. 8 is a diagram showing an inverted arrangement device according to the present invention.

FIG. 9 is a view showing a case where a film-like body without a fiber layer is used.

FIG. 10 is a view conceptually showing a state in which a film-like body and a cylindrical body are rolled.

FIG. 11 is a view showing a state in which a membrane and a tubular body are folded.

FIG. 12 is a diagram showing a state of occurrence of an air pool;

FIG. 13 is a diagram showing a state in which the reversal insertion of the membrane is started in the conventional underground pipe repair method.

FIG. 14 is a view showing a state in which the reverse insertion of the film is completed.

[Explanation of symbols]

 1, 1 ', 1 ", C membrane 3, 3', 3", A tubular 5, B Sewer pipe (underground pipe) 11, 11 'Thermo hose 17 Fiber layer (resin absorbing layer) 19 Non Water-permeable film layer 28 Pressure vessel 30 Insertion port 33 Mounting port (supporting device)

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[Procedure amendment]

[Submission date] October 17, 2001 (2001.10.
17)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of Invention] Underground pipe repair method

[Claims]

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 underground pipe such as a sewer pipe from the inside.

[0002]

2. Description of the Related Art In the event that a main body of an underground pipe such as a sewer pipe is cracked or a connection part is displaced due to aging, an earthquake, land subsidence, etc., the cracked part or the connection part is repaired immediately. Must. Increased infiltration of rainwater and groundwater imposes a heavy burden on treatment facilities such as sewage, and seepage of sewage into the ground causes pollution.

Therefore, as a method of repairing an underground pipe without excavating the ground, a method shown in FIGS. 13 and 14 is adopted.

In this repair method, first, a tubular body A containing an uncured thermosetting synthetic resin is drawn into an underground pipe B. Next, a bag-shaped water-impermeable membrane C is inserted into the tubular body A from the opening of the tubular body A while being inverted by water pressure (see an arrow) (FIG. 13). When the film C is inverted to the rear end portion D and the tube A is pressed against the inner surface of the underground pipe B over substantially the entire length, the water in the film C is heated, and the tube A is heated. The thermosetting synthetic resin of A is cured (FIG. 14). Thereafter, the water in the membrane C is recovered, and the tubular body A and the membrane C are cut at both ends of the underground pipe B to complete the repair.

[0005] The membrane may be extracted before cutting, but in this case, it constitutes a part of the lining structure as an inner impermeable layer.

[0006]

However, in this repair method, the underground pipe must be kept unused for a long time until the repair is completed. Also, at the repair work site, the water pressure management for reversal is complicated, and it is very difficult to always maintain a constant water pressure. Therefore, it is difficult to provide a uniform quality lining structure with this repair method.

Accordingly, an object of the present invention is to provide a method of repairing an underground pipe capable of shortening the time required for repair work and always obtaining a lining structure of a constant quality.

[0008]

In order to achieve this object, an underground pipe repair method according to the present invention includes an uncured synthetic resin in a resin absorbent layer having an impermeable layer on the outside. By pulling the tubular body into the underground pipe and applying a fluid pressure to the inside of the tubular body through an impermeable membrane to cure the curable synthetic resin and lining the underground, In the underground pipe repair method of repairing the inner surface of the pipe as a whole or over a long range, after forming the tubular body containing the curable synthetic resin, the film-like body is inverted into the tubular body. And then pulling the tubular body together with the membrane into the underground pipe.

The membrane can be inverted inside the tubular body by using a pressurized fluid or an inversion tool.

By evacuating the air inside the film-like body, it is possible to achieve a further excellent effect.

When the curable synthetic resin is thermosetting, a thermo hose is attached to the rear end of the film (in a state before the reversal), and then the film is inverted into a cylindrical body. It is preferable to arrange them.

[0012] Further, in the reversing operation of the film, the rear end has an insertion port for the impermeable film, and the front end has a mounting port for fixing the front end of the film. An inverting arrangement device comprising a pressure vessel and a support device for supporting a cylindrical body containing an uncured curable synthetic resin such that the film-like body extending while inverting is arranged inside can be used.

[0013] The mounting port may be configured to also serve as a supporting device.

[0014]

Since the membrane is placed in the tubular body in advance, the step of inverting the membrane and inserting it into the tubular body at the repair work site is eliminated.

Further, by using the means of inversion, it is possible to form a tubular body containing a curable synthetic resin before disposing the film-like body. In the present invention, the tubular body containing the curable synthetic resin is formed prior to the arrangement of the membrane.

If the air inside the membrane is evacuated, the cylinder and the membrane can be folded compactly or rolled. Further, when water for pressing against the inner surface of the underground pipe is poured into the film-like body, a large amount of air does not remain on the upper side of the water to form an air pocket.

If a thermo hose is attached to the rear end of the membrane, the thermo hose is also arranged when the membrane is turned upside down in the tubular body.

When the inside of the pressure vessel of the reversing arrangement device is pressurized, the film-like body is reversed from the front end side, and is disposed in the cylindrical body supported by the mounting port or other supporting device.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a bag-like film 1 containing an uncured curable synthetic resin is previously set in a factory by reversing means.
Is inserted into the sewage pipe 5 (underground pipe) and arranged.

A hydraulic tower 9 is provided in the manhole 7, and a rear end 3a of the tubular body 3 is attached to a lower end 9a of the hydraulic tower 9. The membrane 1 is formed to be longer than the tubular body 3, and a rear portion 1 a of the membrane 1 extending outward from the rear end 3 a of the tubular body 3 is passed through the hydraulic tower 9. Has become. Upper end 9b of hydraulic tower 9
Is open in the shape of a bosh, and the rear end 1b of the membrane 1 is attached to the periphery of the upper end 9b.

Incidentally, it is also possible to form the film-like body 1 to the same length as the cylindrical body 3 and to attach the rear end thereof to the lower end 9a of the hydraulic tower 9 in a watertight manner.

The film body 1 has a thermo hose 11 at its rear end 1c.
Are connected and inserted into the tubular body 3 in the factory, so that the thermo hose 11 is arranged in the membrane-like body 1.

It is preferable to connect the film 1 and the tube 3 in advance so that the film 1 does not shift with respect to the tube 3 during the work on the construction site.

Then, water is poured into the membrane 1 from the rear end 1b, and the tubular body 3 is pressed against the inner surface of the sewer pipe 5 through the membrane 1 as shown in FIG. In this state, a suction hose 13 is placed in the water in the film 1 and water is sucked from the suction hose 13 and heated by a boiler (not shown). The heated water is again supplied from the thermo hose 11 to the film 1.
(See arrow), and the thermosetting synthetic resin in the tubular body 3 is cured.

In some cases, air or steam may be used instead of water.

Waiting for the thermosetting synthetic resin to cure, the water in the film 1 is sucked up and drained, and then the tubular 3
In addition, the cutting process and the recovery of the thermo hose 11 at both ends of the sewer pipe 5 of the membrane 1 are performed to form a lining structure as shown in FIG. 3, and the repair of the entire sewer pipe 5 is completed. The connecting portion 15 of the drain pipe 5 whose sealing function has been reduced is repaired by the tubular body 3 and the membrane body 1.

The film 1 may be finally removed in some cases.

FIG. 4 is a diagram for explaining an embodiment in which a hydraulic tower is not used.

After the bag-like membrane 1 'is inserted into the cylinder 3' by the reversing means, the tubular body 3 'and the membrane 1' are inserted.
(In this case, the rear end of the membrane 1 'is cut). A supply hose 20 is attached to the stopper 16, and a discharge hose 2 is attached to the stopper 18.
2 are installed. Then, the tubular body 3 'and the membrane-like body 1' are drawn into the sewer pipe 5, water is supplied from the supply hose 20, and the tubular body 3 'is pressed against the inner surface of the sewer pipe 5.
In this state, a valve (not shown) provided on the stopper 18 is opened, water is discharged from the discharge hose 22, and heated by a boiler (not shown). The heated water is supplied again from the supply hose 20 to cure the thermosetting synthetic resin in the cylindrical body 3 '.

The supply hose 20 and the discharge hose 22
May be installed at the repair work site. In some cases, air or steam is used instead of water.

FIG. 5 is a view for explaining another embodiment in which a hydraulic tower is not used.

The film-like body 1 "is placed inside the cylindrical body 3" and the rear end 1c '.
After the thermo hose 11 'is connected to the cylindrical body 3 "and inserted by the reversing means, the stopper 29 is attached to the opening of the tubular body 3" and the membrane 1 ". A thermo hose 11 ′, a supply hose 24, and a discharge hose 26 are attached to the stopper 29. The tubular body 3 ″ and the membrane body 1 ″ are drawn into the drain 5, and water is supplied from the supply hose 24 through the thermo hose 11 ′. Thereafter, the water is discharged from the discharge hose 26, heated by a boiler (not shown), and the heated water is supplied again from the thermo hose 11 '(see arrow).

As shown in detail in FIG. 6, the cylindrical body 3, 3 ', 3 "is made of a fiber layer 17 made of glass fiber, polyester fiber or the like.
A water-impermeable film layer 19 made of polyethylene, polyurethane or nylon is provided outside the (resin absorbing layer). The fiber layer 17 is made of a thermosetting synthetic resin such as an unsaturated polyester resin or an epoxy resin. Impregnated in the state. Although a thermosetting resin was used as the curable synthetic resin, it is also possible to use a room temperature curable or ultraviolet curable resin in the case shown in FIG. Water and air to press against the inner surface of the water pipe 5,
Steam can also be used in combination.

Each of the membranes 1, 1 ', 1 "is an impermeable film made of polyethylene, polyurethane or nylon, and has a fiber layer 2 made of glass fiber, polyester fiber or the like inside.
1 is additionally formed so that the film-like bodies 1, 1 ', 1 "are inside the tubular bodies 3, 3', 3" in the factory as shown in FIG. The fiber layer 21 is inserted while being inverted so as to be in contact with the fiber layer 21. Membranes 1, 1 ',
To reverse 1 ", the pressure of water or air, or in some cases, the pressure of a fluid such as water and air may be used, but the reversing tool 23 shown in FIG. 7 is advanced by a cylinder (not shown) and bent. The part 25 may be pushed by the tip annular body 27 (see the phantom line in FIG. 6).

When utilizing the pressure of a fluid, an inversion arrangement device shown in FIG. 8 is used.

A slit-shaped insertion port 30 is provided at the rear end of the pressure vessel 28 of the reversing arrangement apparatus installed in the factory, and a mounting port 33 is formed at the front end 32. An impermeable membrane 1, 1 ″ is folded and accommodated in an accommodation chamber 34 formed behind the pressure vessel 28, and the leading end of the membrane 1, 1 ″ is inserted through the insertion port 30. It is inserted into the pressure vessel 28 and reaches the mounting port 33. A fixing device 35 is formed outside the mounting opening 33, and the tip of the film-like body 1, 1 ″ is folded back outside the mounting opening 33, and the cylindrical body 3 containing an uncured thermosetting synthetic resin is formed.
After covering the rear end of the 3 ", the bolt 37 of the fixing device 35 is tightened. By the tightening of the bolt 37, the annular tightening member 39 of the fixing device 35 causes the front end of the membrane 1, 1" and the cylindrical body 3, 3 to be fastened. "The rear end is fixed to the mounting opening 33.

A supply port 41 formed in the pressure vessel 28
When the pressurized fluid is supplied into the pressure vessel 28 from above, the membrane 1, 1 "is inverted from the tip side and inserted into the tubular 3, 3". Thermo hose 1 at the rear end of the membrane 1,1 "
1, 11 'is attached, this thermo hose 1
1, 11 'is the film-like body 1, 1 "when the film-like body 1, 1" is invertedly inserted.
1 "at the same time.

In the accommodation chamber 34 behind the pressure vessel 28, speed adjusting rollers 43, 45 are also provided. The speed adjusting roller 43 is rotated at a predetermined speed by a motor 47, and the film-shaped members 1, 1 " Since the feeding speed of the hoses 11 and 11 'is regulated, the reversing speed of the membranes 1 and 1 "does not become too high.

A rubber sealing member 49 is attached to the inside of the insertion port 30. The sealing member 49 is in close contact with the membranes 1 and 1 "and then with the thermo hoses 11 and 11 '. Is prevented from leaking from the insertion port 30.

The distal end 32 of the pressure vessel 28 can be replaced by removing the mounting ring 51, so that the
A mounting port corresponding to a diameter of 1 "can be prepared.
In the figure, reference numeral 53 denotes a film-like body 1, 1 "and a thermo hose 1
55, supporting rollers for preventing 1, 11 'from hanging down
Is a mounting table for the film-like bodies 1, 1 "and the thermo hoses 11, 11 '.

When the method shown in FIG. 4 is carried out using this reversing arrangement device, no thermo hose is attached to the rear end of the film 1 '. When the method shown in FIG. 1 is carried out, the rear end side of the tubular body 3 is slightly cut off after the film body 1 is inserted upside down.

Fiber layer 2 formed on film-like bodies 1, 1 ', 1 "
1 is not initially impregnated with a synthetic resin,
When inserted into 3 ′, 3 ″, the thermosetting synthetic resin is absorbed from the fiber layer 17. The fiber layer 21 may contain some thermosetting synthetic resin. As shown in FIG. 9, a fiber layer may not be added to the shapes 1, 1 ', 1 ". Further, the film-like bodies 1 ', 1 "
As in the case of, it may be finally removed.

After inserting the membrane 1 'into the tubular body 3' or after inserting the membrane 1 'into the tubular body 3', the plugs 16 and 1 are inserted.
After the attachment of the film 8, unlike the case of FIGS. 1, 4 and 5, if the air in the film 1, 1 ′, 1 ″ is evacuated, as shown in FIGS. , 1 ', 1 "and the cylindrical bodies 3, 3', 3" can be compactly wound or folded, so that the transportation work to the repair work site is extremely easy. Since the shape is not necessarily circular, the cylindrical body 3,
Normally, water, which is an incompressible fluid, is used to press the 3 ', 3 ", but if air in the membranes 1, 1', 1" is evacuated, as shown in FIG. Air pool 31 does not occur, and the entire circumference of film-like body 1, 1 ', 1 "comes into contact with water.
Curing of the thermosetting synthetic resin in 3 ', 3 "proceeds equally in all parts.

Here, the plug 29 is attached to the opening of the tubular body 3 "and the membrane 1" at the construction site.

[0046]

As described above, by using the repair method of the present invention, the repair work can be completed in a short time, and the quality of the lining structure can be prevented from being varied.

Further, since the cylindrical body containing the curable synthetic resin is formed before the film-like body is arranged, the formation of the cylindrical body and the arrangement of the film-like body are performed simultaneously, and then the curing is performed. The curable synthetic resin can be sufficiently and uniformly contained as compared with the means for containing the curable synthetic resin, and as a result, the quality of the cylindrical body and thus the lining structure can be improved.

If the air inside the membrane is released, the cylinder and the membrane can be folded compactly or rolled, so that they can be transported to the repair work site very easily. It is possible, and also put water in the membrane,
When lining by curing thermosetting synthetic resin,
Since the cured state of the thermosetting synthetic resin can be prevented from being partially different, a lining structure of excellent quality can be provided.

If the thermo-hose is attached to the rear end and the film is turned upside down, a special process for arranging the thermo-hose becomes unnecessary, and the film is used by the thermo-hose when the thermo-hose is arranged. There is no danger of damage.

The present invention can be effectively carried out by using a reversing arrangement device composed of a pressure vessel provided with an insertion port and a mounting port for the membrane, and a support device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a tubular body and a membrane-like body are drawn into a sewer pipe in the underground pipe repair method according to the present invention.

FIG. 2 is a diagram showing a state in which water pressure is applied to a film-shaped body to supply heated water.

FIG. 3 is a diagram showing a state in which repair work has been completed.

FIG. 4 is a diagram for explaining an embodiment in which a hydraulic tower is not used.

FIG. 5 is a diagram illustrating another embodiment in which a hydraulic tower is not used.

FIG. 6 is a view conceptually showing a state in which the membrane is inverted and inserted into the tubular body.

FIG. 7 is a perspective view of a reversing tool.

FIG. 8 is a diagram showing an inverted arrangement device.

FIG. 9 is a view showing a case where a film-like body without a fiber layer is used.

FIG. 10 is a view conceptually showing a state in which a film-like body and a cylindrical body are rolled.

FIG. 11 is a view showing a state in which a membrane and a tubular body are folded.

FIG. 12 is a diagram showing a state of occurrence of an air pool;

FIG. 13 is a diagram showing a state in which the reversal insertion of the membrane is started in the conventional underground pipe repair method.

FIG. 14 is a view showing a state in which the reverse insertion of the film is completed.

[Description of Signs] 1,1 ′, 1 ″, C Membrane 3,3 ′, 3 ″, A Tubular 5, B Sewage Pipe (Underground Pipe) 11,11 ′ Thermo Hose 17 Fiber Layer (Resin) Absorption layer) 19 water-impermeable film layer 28 pressure vessel 30 insertion port 33 mounting port (supporting device)

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Katsumi Nakamura, Inventor 47-4 Kakinotdai, Midori-ku, Yokohama, Kanagawa Prefecture (72) Hideo Oki 3-25-6, Ekoda, Midori-ku, Yokohama-shi, Kanagawa F-term (reference) 3H025 EA01 EB23 EC06 ED02 EE05 4F211 AD16 AD20 AG03 AG08 AH43 SA13 SC03 SD04 SD11 SH18 SN03 SN05 SP12 SP15 SP21 SP25 SW23 SW45

Claims (5)

[Claims] 1. A tubular body containing an uncured curable synthetic resin is drawn into an underground pipe into a resin absorbent layer having a water-impermeable layer on the outside, and this tubular body is inserted through an impermeable membrane. An underground pipe repairing method for repairing the underground pipe inner surface entirely or over a long range by applying fluid pressure to the inside of the body, curing the curable synthetic resin and performing lining, A method of repairing an underground pipe, wherein the body is placed in the tubular body in a reversed state in advance, and the tubular body is drawn into the underground pipe together with the membrane. 2. The method according to claim 1, further comprising bleeding air from inside the film-shaped body disposed in the cylindrical body, and drawing the cylindrical body together with the film-shaped body into the underground pipe. Underground pipe repair method. 3. The curable synthetic resin is thermosetting,
The underground pipe repair method according to claim 1 or 2, wherein the film-like body is disposed beforehand in the tubular body after being turned over after a thermo hose is attached to a rear end portion. 4. A pressure vessel having an impervious membrane-shaped insertion port at a rear end and a mounting port for fixing a front end of the membrane at a front end, and a membrane extending while turning over. A support device for supporting a tubular body containing an uncured curable synthetic resin such that the tubular body is placed inside the inverted body. 5. The reversing arrangement device according to claim 4, wherein said mounting opening also serves as said support device.