JPH0775865B2 - Grout material injection method in pipeline repair method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting grout material into a joint between a main pipe and a branch pipe in a pipeline repair method.

[0002]

2. Description of the Prior Art When a pipeline such as a sewer pipe buried in the ground is deteriorated, a lining is applied to the inner peripheral surface of the pipeline without excavating the pipeline to repair the pipeline. A construction method has already been proposed and put to practical use (see, for example, JP-A-60
No. 242038). That is, this pipe repairing method involves inverting the pipe lining material formed by impregnating a curable resin into a resin absorbent material such as a non-woven fabric whose outer peripheral surface is covered with a highly airtight film into the pipe by fluid pressure. While inserting it, press it against the inner peripheral surface of the pipe, and while maintaining this state, the curable resin impregnated in the pipe lining material is heated to cure it, and the cured pipe lining material This is a method of lining the inner peripheral surface of the pipeline.

By the way, the above-mentioned construction method is applied not only to the main pipe but also to a branch pipe branched from the main pipe. For example, in a sewer pipe or the like, groundwater enters from a joint between the main pipe and the branch pipe.
A grout material is injected into the joint to prevent the intrusion of groundwater (for example, JP-A-62-28472).
No. 7, JP-A-1-188327).

[0004]

However, since the grout material is conventionally injected through the hose or groove at the joint between the main pipe and the branch pipe, there is a problem that workability is poor.

The present invention has been made in view of the above problems. An object of the present invention is to provide a pipe repairing method capable of injecting grout material into a joint between a main pipe and a branch pipe with good workability. It is to provide a grout material injection method.

[0006]

In order to achieve the above object, the present invention provides a method for injecting grout material into a joint between a main pipe and a branch pipe, in which the outer peripheral surface of a tubular non-woven fabric is covered with a highly airtight film. After impregnating the grout material injection liner with the grout material, the grout material injection liner is inverted and inserted into the branch pipe by fluid pressure, and this is advanced to the junction between the main pipe and the branch pipe. As it is, the inner pressure of the grout material injection liner is increased to flow out the grout material impregnated in the liner and inject it into the joint between the main pipe and the branch pipe, and after the grout material is hardened, the grout material injection liner is branched. It is characterized by being pulled out from the pipe.

[0007]

According to the present invention, only by increasing the internal pressure of the grout material injection liner which is inverted and inserted into the branch pipe, the grout material impregnated in the liner flows out from the liner, and this flows between the main pipe and the branch pipe. Since it is injected into the joint portion, the grout material can be injected with good action without using a conventional hose or groove. Even if the internal pressure of the grout material injection liner is increased, the pipe lining material lining the main tube serves as a stopper, so that the grout material injection liner is prevented from flowing into the main tube.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 are sectional views showing the method of the present invention in the order of steps, FIG. 4 is an enlarged detailed view of a portion A of FIG. 3, FIG. 5 is a sectional view showing a cutting operation of a main lining material, and FIG. It is a partial perspective view of a grout material injection liner.

The method of the present invention is a method of injecting the grout material 3 into a joint between a main pipe 1 such as a sewer pipe buried in the ground shown in FIG. 3 and a branch pipe 2 branched from the main pipe 1. Main 1
Pipe lining materials 4 and 5 are lined on the inner peripheral surface of the branch pipe 2 by a known pipe repairing method.

The grout material 3 is a substance which is hardened by contact with water, and includes a hydrophilic polyurethane resin, cement milk, a mixture of a hydrophilic polyurethane resin and a thermosetting resin, silicone resin, butyl rubber, acrylamide. ,
A mixture of acrylamide and a thermosetting resin is included.

In carrying out the method of the present invention, the equipment shown in FIG. 1 is first prepared.

That is, reference numeral 6 in FIG. 1 denotes a cylindrical suction hose, and a liner mounting nozzle 7 is provided at one end thereof.
Are attached, and the other end is closed by a cap 8. An air hose 11 leading from the pressure gauge 9 and the compressor 10 is connected to the cap 8.

A grout material injection liner 12 is housed in the suction hose 6, and the tip portion of the grout material injection liner 12 is folded back and attached to the outer periphery of the end portion of the liner attachment nozzle 7. . The rope 1 is attached to the end of the grout material injection liner 12.
One end of the rope 3 is tied, and the other end of the rope 13 penetrates the cap 8 to extend outside the suction hose 6 and is wound around a winch 14 shown in FIG.

By the way, the grout material injection liner 1
As shown in FIG. 6, 2 is a tubular non-woven fabric 16 made of polyester, polypropylene, acrylic or the like whose outer peripheral surface is covered with a highly airtight plastic film 15, and a grout material 3
Is impregnated with the material, and an excessive amount of the grout material 3 that cannot be impregnated is enclosed in the vicinity of the end portion of the material. The material of the plastic film 15 is
Polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride, etc. are selected.

When the preparation of the equipment shown in FIG. 1 is completed, FIG.
As shown in FIG. 1, the compressor 10 is driven to supply compressed air through the air hose 11 to the suction hose 6.
Supply in. Then, the grout material injection liner 12 is inserted into the branch pipe 2 (specifically, the pipe lining material 5) downward while being inverted by receiving the pressure of the compressed air. The reverse insertion speed of the grout material injection liner 12 is adjusted by the rope 13.

Branch pipe 2 of the grout material injection liner 12
Inversion and insertion within the liner 1 as shown in FIG.
2 goes to the junction between the main pipe 1 and the branch pipe 2, and this is the main pipe 1.
When it comes into contact with the pipe lining material 4 of FIG.

Next, when the internal pressure of the grout material injection liner 12 is increased while keeping the state shown in FIG. 3, the grout material 3 impregnated in the liner 12 flows out from the liner 12 by the pressure and the liner 12 Excess grout material 3 enclosed in the end part is also liner 12 by pressure.
As shown in detail in FIG. 4, these grout materials 3 are extruded through the path indicated by the arrow into the a and b portions near the junction between the main pipe 1 and the branch pipe 2. It still,
Even if the internal pressure of the grout material injection liner 12 is increased as described above, the pipe lining material 4 lining the main tube 1 serves as a stopper, so that the grout material injection liner 12 is prevented from flowing into the main tube 1. .

Then, after the grout material 3 injected into the portions a and b is hardened by touching the groundwater, the rope 13 is wound up by the winch 14 shown in FIG. It is taken out, and the injection work of the grout material 3 is completed here.

In the method of injecting the grout material 3 described above, the grout material 12 impregnated in the liner 12 is removed from the liner 12 only by increasing the internal pressure of the grout material injecting liner 12 which is inverted and inserted into the branch pipe 2. Since it flows out and is injected into the portions a and b in the vicinity of the joint between the main pipe 1 and the branch pipe 2, it is possible to inject the grout material 3 into a required place with good workability without using a conventional hose or groove. it can.

After the pouring work of the grout material 3 is completed, as shown in FIG. 5, while monitoring with the camera 17 introduced into the main pipe 1, a cutter also introduced into the main pipe 1 is used. By cutting the portion 4a of the pipe lining material 4 of the main pipe 1 where the branch pipe 2 is opened by the device 18, the branch pipe 2 communicates with the main pipe 1, and a series of repair work for the main pipe 1 and the branch pipe 2 is completed. To do.

In the above embodiment, the grout material injection liner 12 was turned over and inserted into the branch pipe 2 by air pressure. However, as shown in FIG.
It may be inserted. That is, one end of the grout material injection liner 12 is folded back and attached to the fixed frame 19, and the water injection hose 2 is attached to the folded back portion of the liner 12.
When water 21 is injected from 0, the liner 12 is inserted downward in the branch pipe 2 while being inverted by water pressure.

Further, as shown in FIG. 8, a non-woven fabric 22 attached to the collar portion 5a of the pipe lining material 5 of the branch pipe 2 and a non-woven fabric 23 sandwiched between the main pipe 1 and the pipe lining material 4 are provided.
If the grout material 3 is injected into both the non-woven fabrics 22 and 23 by the above-mentioned method in the state where they are in close contact with each other and they are cured at the same time, the non-woven fabrics 22 and 23 are bonded and integrated to enhance their adhesiveness. To be

[0024]

As is apparent from the above description, according to the present invention, in the method of injecting grout material into the joint between the main pipe and the branch pipe, the outer peripheral surface of the tubular non-woven fabric is coated with a highly airtight film. After impregnating the grout material injection liner with the grout material, the grout material injection liner is inverted and inserted into the branch pipe by fluid pressure, and this is advanced to the junction between the main pipe and the branch pipe. As it is, the inner pressure of the grout material injection liner is increased to flow out the grout material impregnated in the liner and inject it into the joint between the main pipe and the branch pipe, and after the grout material is hardened, the grout material injection liner is branched. Since it is pulled out from the pipe, the effect that the grout material can be injected into the joint between the main pipe and the branch pipe with good workability is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the method of the present invention in the order of steps thereof.

FIG. 2 is a cross-sectional view showing the method of the present invention in the order of steps.

FIG. 3 is a cross-sectional view showing the method of the present invention in the order of steps thereof.

FIG. 4 is an enlarged detailed view of a portion A of FIG.

FIG. 5 is a cross-sectional view showing a cutting operation of a main lining material.

FIG. 6 is a partial perspective view of a grout material injection liner.

FIG. 7 is a cross-sectional view showing another embodiment of the method for inverting and inserting the grout material injection liner.

FIG. 8 is a cross-sectional view showing the vicinity of a joint between a main pipe and a branch pipe according to another embodiment of the present invention.

[Explanation of symbols]

 1 main pipe 2 branch pipe 3 grout material 12 grout material injection liner 15 plastic film 16 tubular non-woven fabric

Claims (1)

[Claims] 1. A method of injecting grout material into a joint between a main pipe and a branch pipe, wherein a grout material injection liner formed by coating an outer peripheral surface of a tubular nonwoven fabric with a highly airtight film is impregnated with the grout material. After that, the grout material injection liner is inverted and inserted into the branch pipe by fluid pressure, and it is advanced to the joint between the main pipe and the branch pipe.In that state, the inner pressure of the grout material injection liner is increased to increase the liner. The grout material impregnated in the effluent is poured out into the joint between the main pipe and the branch pipe, and after the grout material is hardened, the grout material injection liner is extracted from the branch pipe. Method for injecting grout material in.