JPH0832428B2 - Pipe lining material manufacturing method and 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 manufacturing a pipe lining material used for repairing a conduit and a method for repairing a conduit using the pipe lining material manufactured by the 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 reversing a resin-impregnated liner made by impregnating a liquid curable resin into a resin absorbent 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 while pressing it against the inner peripheral surface of the pipe,
In this method, the curable resin impregnated in the liner is heated and cured while keeping this state, and the inner peripheral surface of the conduit is lined with the cured liner.

However, when the above construction method is applied to, for example, a sewer pipe into which groundwater enters, there arises a problem that the curable resin impregnated in the liner comes into contact with the groundwater and causes curing failure.

Therefore, the pipe lining material has a multi-layer structure,
A method in which each layer is impregnated with liquid curable resin and grout material so that the layer impregnated with grout material is pressed against the inner peripheral surface of the conduit while the pipe lining material is inverted and inserted into the conduit. Is proposed.

Thus, according to the above method, since the grout material impregnated in the outermost layer contacting the inner peripheral surface of the pipeline is hardened by contacting with groundwater or the like, the liquid curable resin impregnated in the inner layer is groundwater. The lining can be applied to the sewer pipe or the like into which ground water enters without touching the above to cause curing failure.

[0006]

However, in the production of the pipe lining material used in the above method, the non-woven fabric is preliminarily formed into a tubular multi-layer structure, and then the liquid curable resin and the grout material are provided for each layer of the non-woven fabric. Since they were separately impregnated, the work was difficult, and it was extremely difficult to uniformly impregnate each layer of the nonwoven fabric with the liquid curable resin and the grout material over the entire length.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a pipe lining material that can easily and uniformly impregnate a liquid curable resin or a grout material over the entire length. It is to provide a manufacturing method of.

Another object of the present invention is to provide a pipeline repairing method capable of reliably lining and repairing a pipeline into which water enters.

[0009]

In order to achieve the above object, the present invention provides a resin-impregnated liner obtained by impregnating a liquid curable resin into a tubular nonwoven fabric whose outer peripheral surface is covered with a highly airtight film, and an airtightness High tubular open liner,
In a method for producing a pipe lining composed of a grout material-impregnated liner obtained by impregnating a tubular non-woven fabric whose outer peripheral surface is coated with a highly airtight film with a grout material, a fluid of the open liner in the resin-impregnated liner. It is characterized in that the grout material-impregnated liner is inserted into the open liner in interlock with the inversion and insertion operation of the open liner by pressure.

Further, in the method of the present invention, the pipe lining material obtained by the above-mentioned manufacturing method is inverted and inserted into the pipe line by the fluid pressure and pressed against the inner peripheral surface of the pipe line, and this state is maintained. The liquid curable resin impregnated in the resin-impregnated liner of the pipe lining material is cured.

[0011]

According to the present invention, a grout material-impregnated liner in which a grout material has been uniformly impregnated in advance over the entire length of a resin-impregnated liner in which a liquid curable resin has been uniformly impregnated over the entire length in advance. The pipe lining material is manufactured by inserting it through the open liner.Since the liquid curable resin and the grout material are preliminarily and independently impregnated into the non-woven fabric, these impregnation operations are facilitated and the pipe lining material is The liquid curable resin and the grout material are uniformly impregnated over the entire length.

Therefore, if the pipe line through which water penetrates is repaired using such a pipe lining material, the pipe lining material is uniformly impregnated with the liquid curable resin and the grout material as described above. Therefore, it is possible to surely perform lining and repair even for the pipeline where water enters.

[0013]

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

1 and 2 are sectional views showing a method of manufacturing a pipe lining material according to the present invention in the order of steps, FIG. 3 is a sectional view of an end portion of the pipe lining material, and FIG. 4 is a partial perspective view of the pipe lining material. is there.

The pipe lining material 1 shown in FIG. 4 is manufactured by the following procedure.

That is, in FIG. 1, 2 has a thickness of 2 m / m to 3
A resin-impregnated liner of 0 m / m, wherein the resin-impregnated liner 2 is formed by coating the outer peripheral surface of a tubular nonwoven fabric 3 such as polyester, polypropylene or acrylic with a highly airtight plastic film 4. The liquid curable resin is uniformly impregnated over the entire length in advance. The material of the plastic film 4 is polyurethane,
Polyethylene, polyethylene / nylon copolymer, vinyl chloride, etc. are selected. Further, the liquid curable resin includes unsaturated polyester resin, epoxy resin, and photocurable resin.

As shown in FIG. 1, a highly airtight tubular open liner 5 is inserted into the resin-impregnated liner 2 in the direction of the arrow shown while being inverted by fluid pressure such as air pressure. . Open liner 5
Is made of a plastic film or non-woven fabric having a thickness of 0.05 m / m to 1.5 m / m.

By the way, the tip end of the tubular grout material-impregnated liner 6 having a thickness of 0.5 m / m to 3 m / m is attached to the inverted end (end) of the open liner 5, as described above. The open liner 5 is reversely inserted into the resin-impregnated liner 2, and at the same time, the grout material-impregnated liner 6 is inserted into the open liner 5.
Then, as shown in FIG. 2, when the reverse insertion of the open liner 5 is performed over the entire length of the resin-impregnated liner 2, the grout material-impregnated liner 6 becomes the open liner 5.
(And the resin-impregnated liner 2).

By the way, the grout material impregnated liner 6 is
The outer peripheral surface of a tubular non-woven fabric 7 similar to the non-woven fabric 3 of the resin-impregnated liner 2 is covered with a highly airtight plastic film 8, and the non-woven fabric 7 is previously inserted (that is, the resin-impregnated liner 2 is inserted into the open liner 5). Before), the grout material is uniformly impregnated over the entire length. Incidentally, the grout material is a substance that hardens when exposed to water, and includes a hydrophilic polyurethane resin, cement milk, a mixture of a hydrophilic polyurethane resin and a thermosetting resin, a silicone resin,
Examples include butyl rubber, acrylamide, a mixture of acrylamide and a thermosetting resin, and thermosetting resins such as polyester and epoxy.

When the grout material-impregnated liner 6 is inserted into the open liner 5 as described above, the grout material-impregnated liner 6 and the open liner 5 are aligned with the ends of the resin-impregnated liner 2. It cuts in the AA line part of FIG. Then, as shown in FIG. 3, the cut ends of the open liner 5 and the grout material-impregnated liner 6 are connected and integrated with the resin-impregnated liner 2 by using bolts 9, nuts 10 and washers 11 to maintain airtightness. By covering these ends with a plastic film 12 in order to obtain the desired pipe lining material 1 shown in FIG.

Pipe lining material 1 manufactured by the above procedure
In FIG. 4, the grout material-impregnated liner 6 constitutes the inner layer and the resin-impregnated liner 2 constitutes the outer layer with the open liner 5 as the boundary. The resin-impregnated liner 2 uniformly impregnated over the entire length is inserted with the grout material-impregnated liner 6 in which the grout material is impregnated uniformly over the entire length through the open liner 5 so that the pipe lining is formed. Since the material 1 is obtained, and the liquid curable resin and the grout material are preliminarily and independently impregnated into the non-woven fabrics 3 and 7, the impregnation work thereof is facilitated, and the pipe lining material 1 has these liquid curable properties. The resin and the grout material are uniformly impregnated over the entire length.

In the above embodiment, the grout material-impregnated liner 6 is directly attached to the inversion end portion of the open liner 5, and the grout material-impregnated liner 6 is inserted into the open liner 5 at the same time when the open liner 5 is inverted and inserted. However, as shown in FIG. 5, one end of the rope 13 is tied to the inverting end portion of the open liner 5, and the rope 1
The other end of the rope 3 is tied to the tip of the grout material impregnated liner 6, and the open liner 5 is turned over and inserted into the rope
After pulling 3 into the open liner 5, the grout material-impregnated liner 6 may be inserted into the open liner 5 by pulling the rope 13 in the direction of the arrow in the figure.

Next, a pipe line repairing method using the pipe lining material 1 manufactured by the method of the present invention will be described with reference to FIGS. 6 and 7. 6 is a sectional view for explaining the pipe repairing method, and FIG. 7 is an enlarged detailed view of a portion B in FIG.

In the figure, 14 is a sewer pipe, and the inner circumference of a branch pipe 15 thereof is already lined with a lining material 16.

The sewer pipe 14 has a
Groundwater invades from the b and c portions, and the sewer pipe 14 into which the groundwater invades is repaired using the pipe lining material 1 as follows.

That is, in the sewer pipe 14, the pipe lining material 1
Is inserted in the direction of the arrow shown in the drawing while being inverted by fluid pressure such as air pressure, and the inverted pipe lining material 1 is pressed against the inner peripheral surface of the sewer pipe 14 by fluid pressure as shown in the figure. Due to the reversal of the pipe lining material 1, the inner layer and the outer layer are reversed from those before the reversal, and as shown in detail in FIG. 7, the grout material-impregnated liner 6 becomes the outer layer, which serves as the sewer pipe 14.
The inner peripheral surface of the resin-impregnated liner 2 is pressed by the inner peripheral surface of the resin-impregnated liner 2 via the open liner 5, and the inner peripheral surface of the resin-impregnated liner 2 is covered with the plastic film 4.

Thus, the sewer pipe 1 of the pipe lining material 1
When the inversion into 4 and the insertion are completed, the pipe lining material 1
The internal pressure of the pipe is kept constant and the pipe lining material 1 is attached to the sewer pipe 1.
While the liquid curable resin impregnated in the resin-impregnated liner 2 is heated while being pressed against the inner peripheral surface of No. 4, it is cured, but at the same time, the grout material-impregnated liner 6 forming the outermost layer touches groundwater. Since the grout material impregnated in the resin hardens, groundwater is prevented from entering, and the resin-impregnated liner 2 is combined with the water blocking effect of the open liner 5.
The intrusion of groundwater to the side is surely prevented.

Therefore, the liquid curable resin which has been uniformly impregnated in advance in the nonwoven fabric 3 of the resin-impregnated liner 2 over its entire length is uniformly hardened, and the inner peripheral surface of the sewer pipe 14 into which groundwater enters is hardened. It is surely lined and repaired by 1.

[0029]

As is apparent from the above description, according to the present invention, a resin-impregnated liner obtained by impregnating a liquid curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a film having high airtightness, and airtightness High tubular open liner and a grout material-impregnated liner formed by impregnating a non-woven fabric having a highly airtight outer peripheral surface with a grout material impregnated with a film, the resin-impregnated liner The open liner is inverted and inserted by fluid pressure into the inside of the open liner,
Since the grout material-impregnated liner is inserted into the open liner in conjunction with the inserting operation, liquid curable resin or grout material can be easily and effectively used as the pipe lining material, and
The effect that it can be impregnated uniformly over the entire length is obtained.

Further, in the method of the present invention, the pipe lining material obtained by the above manufacturing method is inverted and inserted into the pipe line by fluid pressure, and this is pressed against the inner peripheral surface of the pipe line, while maintaining this state. Since the liquid curable resin impregnated in the resin-impregnated liner of the pipe lining material is set to be cured, the effect that the lining can be surely applied to the pipe line where water enters and repaired can be obtained. To be

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method of manufacturing a pipe lining material according to the present invention in the order of steps thereof.

FIG. 2 is a cross-sectional view showing a method of manufacturing a pipe lining material according to the present invention in the order of steps thereof.

FIG. 3 is a sectional view of an end portion of a pipe lining material.

FIG. 4 is a partial perspective view of a pipe lining material.

FIG. 5 is a cross-sectional view showing another embodiment of the method for inserting the grout material-impregnated liner.

FIG. 6 is a cross-sectional view for explaining a pipeline repairing method according to the present invention.

FIG. 7 is an enlarged detailed view of a B part in FIG.

[Explanation of symbols]

 1 Pipe lining material 2 Resin impregnated liner 3,7 Non-woven fabric 4,8 Plastic film 5 Open liner 6 Grout material impregnated liner 13 Rope 14 Sewer pipe (pipe line)

Claims (4)

[Claims] 1. A resin-impregnated liner made by impregnating a liquid curable resin into a tubular non-woven fabric whose outer peripheral surface is covered with a film having high airtightness, a tubular open liner having high airtightness, and an outer peripheral surface having airtightness. A method for producing a pipe lining material comprising a grout material-impregnated liner obtained by impregnating a tubular non-woven fabric covered with a high film with a grout material, wherein the open liner is inverted by fluid pressure in the resin-impregnated liner. A method for producing a pipe lining material, which comprises inserting the grout material-impregnated liner into the open liner in tandem with insertion, and interlocking with inversion and insertion operations of the open liner. 2. The tip end of the grout material-impregnated liner is attached to the inverted end portion of the open liner, and the grout material-impregnated liner is inserted into the open liner at the same time when the open liner is inverted and inserted. Item 1. A method for producing a pipe lining material according to item 1. 3. One end of a rope is attached to an inverted end of the open liner, and a tip of the grout material-impregnated liner is attached to the other end of the rope, and the rope is inserted into the open liner by reversing and inserting the open liner. The method for producing a pipe lining material according to claim 1, wherein the grout material-impregnated liner is inserted into the open liner by pulling the rope after being pulled into the open liner. 4. A resin-impregnated liner obtained by impregnating a curable resin into a tubular nonwoven fabric whose outer peripheral surface is covered with a highly airtight film, and a highly airtight tubular open liner.
The outer peripheral surface is composed of a grout material-impregnated liner formed by impregnating a grout material into a tubular nonwoven fabric covered with a highly airtight film, and the open liner is inverted and inserted into the resin-impregnated liner by fluid pressure, The pipe lining material obtained by inserting the grout material-impregnated liner into the open liner in conjunction with the inversion and insertion operation of the open liner is inverted and inserted by the fluid pressure, and the pipe inner surface is inserted. A method for repairing a pipe line, characterized in that the liquid curable resin impregnated in the resin-impregnated liner of the pipe lining material is cured while being pressed to the above.