JPH01188325A - Repairing technique of branch pipe - Google Patents

Abstract

PURPOSE:To contrive an improvement of operating efficiency by avoiding an inversion and insertion operations of a tube, by a method wherein a reviving material of a branch pipe is inserted into the branch pipe, a protective hose is pulled out, a tubular lining material is pressed against the inner circumferential surface of the branch pipe and curing resin infiltrated into the tubular lining material is cured. CONSTITUTION:A reviving material 1 of a branch pipe is constituted of by incorporating a filmy tube 3, tubular lining material 4, tube 5 and circulation hose 6 into a protective hose 2 integrally and a guide cone 7 is joined together with the tip part. The reviving material 1 of the branch pipe is passed through into a main pipe 12 from a manhole 11, a rope 9 led out through the tip part is wound up round a winch 14 and the reviving material 1 of the branch pipe is inserted into the branch pipe 15. Winding up is suspended at a point of time when a stopper part 4a of the tubular lining material 4 abuts against the fringe of an opening part 15a and the protective hose 2 is pulled out upward. Water is cast within the tube 5 and the tubular lining material 4 and filmy tube 3 are pressed against inner circumferential surface of the branch pipe 15. Warm water generated by a boiler 18 is fed within the tube 5, thermosetting resin infiltrated into the tubular lining material 4 is warmed and cured and necessary lining is applied to the inner circumferential surface of the timeworn branch pipe 15.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a branch pipe repair method for lining the inner peripheral surface of an aged branch pipe.

(Prior art) When sewer pipes, electric/gas pipes, and other industrial pipes buried underground become obsolete, it is necessary to dig them out.
A pipe repair method has already been proposed and put into practical use, in which the inner circumferential surface of the pipe is lined to repair and reinforce the old pipe without any damage (see, for example, Japanese Patent Application Laid-Open No. 60-242038). That is, in this pipe repair method, a tubular lining material made of a flexible resin absorbing material whose surface is coated with a film and impregnated with a hardening resin is inserted into an old pipe while being inverted using fluid pressure. It is pressed against the inner circumferential surface of the aged pipe, and then the tubular lining material is heated, etc. to harden the curable resin impregnated with it, thereby forming a rigid lining pipe on the inner circumference of the aged pipe and lining it. It is a construction method.

By the way, if the above method is applied to a branch pipe branching from a main pipe, the rigid lined pipe will protrude into the main pipe from the branch pipe opening, and it will be necessary to cut out the protruding part of this rigid lined pipe. The problem arises that not only is the work troublesome, but the efficiency of the lining work is reduced.

Therefore, the present applicant has proposed a branch pipe repair method that can solve the above problem (see specification of Japanese Patent Application No. 88953/1983).
That is, in this construction method, a branch pipe resuscitation material made by inserting a tubular lining material with a stopper at the end into a protective hose is pulled up from the lower end opening of the branch pipe, inserted into the branch pipe, and maintained in this state. The protective hose is pulled out from the tubular lining material while the protective hose is still in place, and then the tube is reversely inserted into the tubular lining material using fluid pressure, and the tubular lining material is pressed against the inner peripheral surface of the branch pipe, and the tubular lining material is impregnated in this state. In this method, a rigid lining pipe is formed on the inner circumferential surface of the branch pipe by curing the curable resin, and the required lining is applied.

According to this construction method, the rigid lined pipe does not protrude into the main pipe from the lower end opening of the branch pipe, and the work of cutting out the protruding part of the rigid lined pipe, which was required in the past, is no longer necessary. Efficiency will be improved.

(Problem to be Solved by the Invention) However, in the above construction method, after the tubular lining material is inserted into the branch pipe, the tube is reversed and inserted into the tubular lining material using fluid pressure. The time and effort required for reversing and inserting was wasted, leaving room for improvement in work efficiency.

The present invention has been made in view of the above circumstances, and its object is to provide a branch pipe repair method that can improve work efficiency by eliminating the work of reversing and inserting tubes.

(Means for solving the problems) In order to achieve the above object, the present invention impregnates a curable resin,
In addition, the main branch pipe resuscitation material is constructed by inserting a tubular lining material with a stopper portion at one end and a tube with one end closed inside the flexible protective hose. , wind up the rope led out from the tip of the branch pipe resuscitation material, pull up the branch pipe resuscitation material from the lower end opening of the branch pipe and insert it into the branch pipe, and while maintaining this state, pull out the protective hose, Thereafter, water is injected into the tube to press the tubular lining material against the inner peripheral surface of the branch pipe by water pressure, and while maintaining this state, the curable resin impregnated into the tubular lining material is cured, and finally the tube is finished. and the branch pipes are repaired by draining the water.

(Function) Since the tube is previously installed inside the tubular lining material, water can be immediately injected into the tube from the water injection hose after inserting the branch pipe resuscitation material into the branch pipe and pulling out the protective hose. This eliminates the need to invert and insert the tube into the tubular lining material, which was required in conventional construction methods, thereby increasing work efficiency and shortening the construction period.

(Example) An example of the present invention will be described below based on the accompanying drawings.

Fig. 1 is a perspective view of the branch pipe resuscitation material l used in the construction method of the present invention, and Fig. 2 is a cross-sectional view of the same branch pipe resuscitation material l, which is made by spirally wrapping PVC. As shown in FIG. 2, a film-like tube 3, a tubular lining material 4. It is constructed by integrating a tube 5 and a circulation hose 6, and a tapered guide cone 7 is tied to the tip of the protection hose 2.

By the way, the film tube 3 is made of PvC, nylon, polyurethane, polyester elastomer, etc., and the tubular lining material 4 is incorporated inside it. It is constructed by impregnating a thermosetting resin into a flexible felt whose inner peripheral surface is coated with a film of PvC, nylon, polyurethane, polyester elastomer, etc., and a flange-like stopper part 4a is formed at the end thereof. has been done. On the other hand, a ring-shaped expansion gasket 8 is adhered to the end face of this stopper portion 4a. The felt of the tubular lining material 4 is impregnated with the thermosetting resin while the inside of the felt is evacuated by a vacuum pump. Further, the stopper portion 4a of the tubular lining material 4 maintains a brim-like shape by curing the thermosetting resin impregnated into this portion, and the expansion packing 8 bonded to the stopper portion 4a is water-resistant. When it contains, it expands and performs a sealing function.

The tube 5 with one end closed is incorporated in the tubular lining material 4, and the tube is constructed by coating the inner peripheral surface of polyester or nylon fiber with a film of nylon, polyurethane, etc. The circulation hose (hot water hose) 6 is built into the inside of the tube 5, and one end of the circulation hose 6 is connected to the end of the tube 5 (
closed end).

The film tube 3, tubular lining material 4, tube 5, and circulation hose 6 incorporated into the protective hose 2 are tied together at one end (the right end in 2nd r5!I) with the lobe 9. The lobe 9 is led out from the hole of the guide cone 7 to the outside of the protective hose 2. In addition, in FIG. 2, 10... is a string.

Next, the construction method of the present invention using the branch pipe resuscitation material 1 constructed as described above will be explained based on FIGS. 3 to 7. 3 to 6 are cross-sectional views showing the construction method of the present invention in the order of its steps, and FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. 6.

When implementing the construction method of the present invention, first of all, 3r5! As shown in i, the branch pipe resuscitation material l is passed from the manhole 11 into the main pipe 12, and the rope 9 led out from the tip of the branch pipe resuscitation material l is wound around the winch 14 on the pedestal 13 installed on the ground. It will be done. In this state, when the winch 14 is turned to wind up the rope 9, the branch pipe resuscitation material 1 is inserted into the branch pipe 15 from the lower end opening 15a of the branch pipe 15. The status of this work is monitored on the ground by the TV left camera 6 installed inside the main pipe 12.

Then, the above-mentioned lifting of the branch pipe resuscitation material 1 is continued, and as shown in FIG. For example, the branch pipe resuscitation material 1 is maintained inserted into the branch pipe 15. Thereafter, while maintaining this state, the protective hose 2 is pulled out upward as shown in FIG. 4.

Next, as shown in FIG. 5, when water is injected into the tube 5 from the water injection hose 24, the tube 5 transmits water pressure to the tubular lining material 4 and the film-like tube 3 disposed outside it. The tubular lining material 4 and the film tube 3 are pressed against the inner peripheral surface of the branch pipe 15. Thereafter, while maintaining this state, as shown in FIG. 6, hot water generated in a boiler 18 mounted on a boiler car 17 installed on the ground is supplied from the circulation hose 6 into the tube 5 by a hot water pump 19. Moreover, when the operation of returning the water in the tube 5 to the boiler 18 from the discharge hose 20 is repeated, the thermosetting resin impregnated in the tubular lining material 4 is heated and hardened by the hot water, as shown in FIG. A rigid lined pipe is formed on the inner peripheral surface of the aged branch pipe 15, and the branch pipe 15
The required lining is applied to the

Finally, the hot water in the tube 5 is drained, and the tube 5 and circulation hose 6 are pulled upward from the branch pipe 15, thereby completing the lining work for the branch pipe 15. - In the branch pipe repair method explained above, the tube 5 is installed in the tubular lining material 4 in advance, and the circulation hose 6 is drawn into the tube 5 in advance, so the branch pipe resuscitation material l is placed inside the branch pipe 15. water can be injected into the tube 5 from the water injection hose 24 immediately after the protective hose 2 is pulled out, which eliminates the work of reversing and inserting the tube 5 into the tubular lining material 4, which was required in conventional construction methods. This eliminates the need for this, which has the effect of increasing work efficiency and shortening the construction period.

By the way, in the embodiment described above, since the expansion packing 8 is bonded to the stopper part 4a of the tubular lining material 4, if the lining is applied to the main pipe 12 after the lining of the branch pipe 15 is completed, the lining shown in FIG. As shown, an expansion gasket 8 is placed around the opening 15a of the branch pipe 15.
is sandwiched between the stopper portion 4a of the tubular lining material 4 and the rigid lining pipe 21 lining the inner peripheral surface of the main pipe 12. Then, the branch pipe opening 15 of the rigid lined pipe 21 is cut by the cutter device M30 installed in the main pipe 12.
If the part that blocks part a (portion a in the figure) is removed, the periphery of the opening 15a of the branch pipe 15 will be sealed by the inflatable gasket 8 as shown in FIG. 9, so groundwater etc. will leak out from here. There is no such thing.

In the above embodiments, a thermosetting resin was particularly used as the curable resin to be impregnated into the tubular lining material 4, but any other curable resin such as a photocurable resin may be used as the curable resin. Can be used. Further, in the above embodiment, if hot water is directly injected from the water injection hose 24 shown in FIG. 5, heating equipment such as the boiler car 17 shown in FIG. 6 is not necessary.

(Effects of the Invention) As is clear from the above explanation, according to the present invention, since the tube is previously installed inside the tubular lining material, water is immediately injected after inserting the branch pipe resuscitation material into the branch pipe and pulling out the protective hose. Water can be injected into the tube from the hose, eliminating the need for inverting and inserting the tube into the tubular lining material, which was required in conventional construction methods, and has the effect of increasing work efficiency accordingly. can get.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the branch pipe resuscitation material used in the construction method of the present invention;
Figure 2 is a sectional view of the branch pipe resuscitation material, Figures 3 to 6 are sectional views showing the method of the present invention in the order of its steps, Figure 7 is a sectional view taken along the line ■-■ in Figure 6, and Figure 8. and FIG. 9 is a sectional view showing the state of the vicinity of the branch pipe opening after main pipe lining. l... Branch pipe resuscitation material, 2... Protective hose, 3... Film tube, 4... Tubular lining material, 4 a
- Stopper part, 5...Tube, 6...Circulation hose, 8...Inflatable gasket, 9...Rope, 12-...
Main pipe, 15-...branch pipe.

Claims (3)

[Claims] (1) A tubular lining material impregnated with a curable resin and having a stopper portion at one end and a tube with one end closed is inserted as a whole into a flexible protective hose. The branch pipe resuscitation material to be constructed is passed through the main pipe, the rope led out from the tip of the branch pipe resuscitation material is wound up, the branch pipe resuscitation material is pulled up from the lower end opening of the branch pipe, and inserted into the branch pipe. Remove the protective hose while maintaining its condition,
Thereafter, water is injected into the tube to press the tubular lining material against the inner peripheral surface of the branch pipe by water pressure, and while maintaining this state, the curable resin impregnated into the tubular lining material is cured, and finally the tube is finished. and a branch pipe repair method characterized by draining water. (2) The branch pipe repair method according to claim 1, characterized in that an expansion packing is adhered to the stopper portion of the tubular lining material. (3) The branch pipe repair method according to claim 1, characterized in that a film-like tube is interposed between the protective hose and the tubular lining material.