JPH0957852A - Start liner with collar for branch tube and tube lining construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrate a connection part by preventing shortage in strength of a lining material owing to inferiority in hardening though ground-water permeates by a method wherein respective one ends of a start liner tube of almost the same diameter as a caliber of a branch tube and a pressure bag connection tube are fitted to a collar. SOLUTION: When a main tube 10 is ended to be lined, a branch tube 11 is then lined by using a branch tube lining material 25. The branch tube lining material 25 is inserted by reversing toward the main tube 10 from a ground side by fluid pressure inside a start liner tube 3 of a start liner with a collar for branch tube an upper part of which is fixed by hauling. At that time, though ground-water is barriered by the start liner tube 3, a thermosetting resin impregnated with the branch lining material 25 does not come in direct contact with the ground-water. Thereby, the setting resin is prevented from being deteriorated in hardening, and strength required for each lining material can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a start liner with a collar for a branch pipe and a pipe lining construction method using the start liner.

[0002]

2. Description of the Related Art When a pipeline such as a sewer pipe buried in the ground is aged, the inner peripheral surface of the pipeline is lined without excavating the pipeline from the ground. A pipeline repair method for repairing is known. This pipe repairing method involves inserting a pipe lining material, which is made by impregnating a curable resin into a flexible tubular resin absorbent material, while inverting the pipe lining material by fluid pressure inside the pipe, This is a method of lining the inner peripheral surface of the pipe by pressing and heating the pipe lining material while maintaining this state to cure the curable resin impregnated therein.

By the way, in a lining for a pipe line in which a plurality of branch pipes branch from a main pipe, such as a sewer pipe,
The main and branch pipes are lined respectively,
An integrated lining was required to increase the airtightness of the connection between the two.

Here, a method of the integrated lining is shown in FIGS. 14 to 16.

In the integrated lining, as shown in FIG. 14, the compressor 119 is installed with the flange 125A of the branch pipe lining material 125 having the flange 125A at one end in close contact with the peripheral edge of the branch pipe opening of the main pipe 110. By driving and supplying compressed air into the pressure bag 113, the branch pipe lining material 125 is inverted and inserted into the branch pipe 111 from the main pipe 110 side toward the ground, and then the branch pipe lining material 125 is inserted into the branch pipe 111. The curable resin impregnated in the branch pipe lining material 125 is cured while being pressed against the inner peripheral wall to cure the branch pipe 111.
(See FIG. 15).

Next, as shown in FIG. 15, the main pipe lining material 122 is reversed and inserted into the main pipe 110 by fluid pressure, and then the main pipe lining material 122 is pressed against the inner peripheral wall of the main pipe 110. The main resin 110 is lined by curing the curable resin impregnated in the main material lining material 122. Then, the main pipe lining material 122 and the brim 125A of the branch pipe lining material 125 are integrated with each other, and high airtightness is secured in the connection portion between the main pipe 110 and the branch pipe 111. After the main pipe lining material 122 is hardened, the branch pipe opening portion (the portion covering the branch pipe opening portion) of the main pipe lining material 122 is cut off by punching.

[0007]

However, when the infiltration of groundwater into the main pipe and the branch pipe is severe, the conventional lining method causes the uncured curable resin impregnated in the lining material to come into direct contact with the groundwater. Therefore, insufficient strength of the lining material may occur due to poor curing of the curable resin,
Since the curable resin flows in the collar portion of the branch pipe lining material, there is a problem that the main pipe lining material and the branch pipe lining material are not completely integrated at the collar portion.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the strength of the lining material due to defective curing of the curable resin even if ground water enters the main pipe and the branch pipe. Another object of the present invention is to provide a start liner with a collar for a branch pipe and a pipe lining construction method which prevent the main pipe and the connecting portion of the branch pipe from being integrated.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 has a collar formed in an arc curved shape along the inner diameter portion shape of the main pipe and having a diameter substantially the same as the diameter of the branch pipe. It is characterized in that the start liner tube and the pressure bag connecting tube are attached to respective ends to constitute a flanged start liner for a branch pipe.

The invention according to claim 2 is characterized in that, in the invention according to claim 1, one end of each of the start liner tube and the pressure bag connecting tube is sandwiched between two flanges. To do.

Further, according to the invention of claim 3, each of one end of the start liner tube and the pressure bag connecting tube having a diameter substantially the same as the diameter of the branch pipe is formed in the brim formed in an arc curved shape along the inner diameter of the main pipe. The pressure bag connecting tube of the starter liner with a flange for the branch pipe is connected to a pressure bag and introduced into the main pipe, and the flange of the starter liner with a flange for the branch pipe is attached to the periphery of the branch pipe opening of the main pipe. After making the start liner tube reversely inserted into the branch pipe from the main side toward the ground by applying a fluid pressure in the pressure bag in a state of being in close contact with the above, the upper part of the start liner tube is pulled and fixed, and While maintaining the condition, the main lining material formed by impregnating the curable resin is reversely inserted into the main pipe by fluid pressure while barriering the infiltration water using the main starter liner. After hardening this, the branch pipe opening of the hardened main lining material is cut off, and then the branch pipe lining material impregnated with a hardening resin is inserted into the inside of the start liner tube from the upper end side by fluid pressure. Then, this is hardened, and the front end of the hardened branch pipe lining material is cut to lining the main pipe and the branch pipe.

[0012] Therefore, according to the present invention, since the lining is applied to the branch pipe and the main pipe into which the ground water penetrates while the ground water is barriered by the start liner tube, the branch pipe lining material and the main pipe lining material are impregnated. The cured resin does not come into direct contact with groundwater, thus preventing the curing failure of the curable resin and ensuring the necessary and sufficient strength for each lining material, as well as the connection between the main pipe and the branch pipe. Integration is possible.

[0013]

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

FIG. 1 is a partially cutaway perspective view of a starter liner 1 for a branch pipe according to the present invention, in which 2 is a ring-shaped two flanges, and these flanges 2 will be described later. The main pipe 10 (see FIG. 2) is formed into an arcuate curved surface along the shape of the inner diameter portion. That is, each collar 2 is made of a non-woven fabric or the like resin absorbent material, unsaturated polyester resin, vinyl ester resin,
It is configured by impregnating a curable resin such as an epoxy resin, and the curable resin impregnated in this is cured in advance so that each collar 2 maintains the shape of an arc curved surface as described above.

Between the two flanges 2, a start liner tube 3 and a pressure bag connecting tube 4 each having a diameter substantially the same as the inner diameter of a branch pipe 11 (see FIG. 2) described later are sandwiched. It is sandwiched and attached.

The start liner tube 3 is made of a highly airtight plastic tube such as polyethylene / nylon / polyethylene, polyurethane, polyethylene or vinyl chloride, and one end thereof is folded back to the outside as shown in the drawing. The opened end is flared outwardly in a petal shape by a plurality of cuts, and the flared portion is sandwiched between two flanges 2. A tubular resin absorbent material 5 made of non-woven fabric is adhered to the inner circumference of the end portion of the start liner tube 3 near the brim 2, and the end portion of the resin absorbent material 5 together with the start liner tube 3 It is sandwiched between two flanges 2. When the start liner tube 3 is inverted at high pressure, the outer surface of the start liner tube 3 may be covered with a tubular woven fabric such as polyethylene or nylon.

On the other hand, the pressure bag connecting tube 4 is also made of a highly airtight plastic tube or the like, and one end thereof is sandwiched between two flanges 2 like the start liner tube 3.

The outer shape of the collar 2 is not limited to a circular shape, but may be any shape such as a square, a rectangle, a hexagon, and other polygons.

Next, a pipe lining construction method using the flanged starter liner 1 for a branch pipe constructed as described above will be described with reference to FIGS. 2 to 11. 2 to 10 are sectional views showing the pipe lining method according to the present invention in the order of steps, and FIG. 11 is an enlarged sectional view taken along the line AA of FIG.

In FIG. 2, 10 is a main pipe such as a sewer pipe, and 1
Reference numeral 1 denotes a small-diameter branch pipe branched from the main pipe 10.
A work robot 12, a pressure bag 13, a branch pipe starter liner 1 for a branch pipe, and the like, which have been preassembled and integrated on the ground, are drawn into the space 0. The pressure bag 13 is connected to the pressure bag connecting tube 4 of the starter liner 1 with a collar for a branch pipe via a connecting pipe 14, and the other end of the pressure bag 13 is closed by a cup-shaped plug 15. ing.

The work robot 12 is hydraulically driven to move its head 16 up and down, and a flange-shaped set nozzle 17 is supported by the head 16. Further, a TV camera 18 for monitoring is installed above the work robot 12.

Then, a start liner 1 with a collar for a branch pipe
The brim 2 is set on the set nozzle 17, and the non-inverted part of the start liner tube 3 is accommodated in the pressure bag 13 through the pressure bag connection tube 4.

In the pressure bag 13, there is formed a closed space S which is closed by the starter liner 1 for a branch pipe and the plug 15, and the closed space S is installed on the ground. A compressor 19 is connected via an air hose 20.

In the above, the work robot 12 and the starter liner 1 with a collar for a branch pipe and the pressure bag 13 supported by the work robot 12 can be moved integrally in the main pipe 10.
While monitoring the inside of the main pipe 10 by the TV camera 18, as shown in FIG. 2, the collar 2 of the starter liner 1 with a collar for a branch pipe is positioned at the opening of the branch pipe 11, and the head 16 of the work robot 12 is moved. By moving upward, the collar 2 of the starter liner 1 with a collar for the branch pipe is connected to the branch pipe opening of the main pipe 10 (main pipe 1
0 is pressed against the peripheral edge of the portion (where the branch pipe 11 is open) to bring it into close contact.

Next, when the compressor 19 installed on the ground is driven to supply compressed air to the closed space S in the pressure bag 13, as shown in FIG. 2, the starter 1 of the branch pipe starter 1 with a collar is started. The liner tube 3 receives the pressure of the compressed air and is inverted, and is sequentially inserted from the main pipe 10 toward the ground side (upward) in the branch pipe 11.

Branch pipe 1 of the starter liner tube 3
When the reverse insertion into 1 is completed, as shown in FIG. 3, the upper part of the start liner tube 3 is towed and fixed on the ground side, and the work robot 12 except the starter liner 1 with a collar for the branch pipe, the pressure bag 13, etc. Are removed from the inside of the main pipe 10.

Next, as shown in FIG. 4, the starter tube 21 for the main pipe, which has the same high airtightness as the start liner tube 3, is inverted and inserted into the main pipe 10 by fluid pressure, and the main line 10 is infiltrated. Barrier the groundwater with the main line starter tube 21.

The starter tube 21 for the main pipe
When the reverse insertion of the main body into the main pipe 10 is completed, as shown in FIG. 5, a main pipe lining material 22 formed by impregnating a curable resin is formed.
Is inverted by fluid pressure into the main pipe 10 (more precisely, the starter tube 21 for main pipe). The main pipe lining material 22 is formed by impregnating an uncured liquid curable resin into a tubular resin absorbent material whose outer surface is covered with a highly airtight plastic film.

Here, the tubular resin absorbent material forming the main lining material 22 is composed of a non-woven fabric such as polyester, polypropylene, nylon, acrylic, and vinylon, and the curable resin impregnated therein is an unsaturated polyester resin, Although a thermosetting resin such as a vinyl ester resin or an epoxy resin is used, a photocurable resin or the like may be used instead of the thermosetting resin. Further, as the material of the plastic film coated on the outer surface of the tubular resin absorbent material, polyurethane, polyethylene, polyethylene / nylon copolymer, vinyl chloride or the like is selected.

When the main lining material 22 has been inverted and inserted into the main pipe 10 (start liner tube 21 for main pipe), fluid pressure is applied to the inside of the main lining material 22 to cause the main pipe to flow. When the main lining material 22 is heated by an arbitrary heating means while the lining material 22 is pressed against the inner peripheral wall of the main tube 10, the thermosetting resin impregnated in the main lining material 22 is cured, and as shown in FIG. The inner peripheral surface of the pipe 10 is lined and repaired with a hardened main pipe lining material 22.

Next, as shown in FIG. 7, a working robot 23 is introduced into the main pipe 10 and a cutter 24 provided in the working robot 23 is driven to drive the main lining material 2
When the portion covering the branch pipe opening 2 is cut by the cutter 24, the branch pipe 11 is opened to the main pipe 10.

When the lining of the main pipe 10 is completed as described above, the branch pipe lining material 25 is used next.
Lining is applied to 1. The branch pipe lining material 25 has the same structure as the main pipe lining material 22.

That is, as shown in FIG. 8, the branch pipe lining material 25 is provided inside the start liner tube 3 of the starter liner 1 with a collar for a branch pipe which is inverted and inserted into the branch pipe 11 and whose upper portion is pulled and fixed. Reverse insertion is performed from the ground side toward the main pipe 10 by fluid pressure. At this time, the branch pipe 11
Even if there is intrusion of groundwater, the groundwater is barriered by the start liner tube 3, so that the thermosetting resin impregnated in the branch pipe lining material 25 does not come into direct contact with the groundwater.

Then, as shown in FIG. 9, the branch pipe lining material 25 is reversely inserted into the start liner tube 3 over the entire length thereof, and as shown in the drawing, the tip portion thereof is the main pipe 10 (main pipe). While projecting into the inside of the lining material 22), fluid pressure is applied to the inside of the branch pipe lining material 25 to press the branch pipe lining material 25 against the inner peripheral wall of the branch pipe 11, Is heated by any heating means, the thermosetting resin impregnated therein is cured and the inner peripheral surface of the branch pipe 11 is cured.
It is lined by 5 and repaired. At this time, since the resin absorbent material 5 is adhered to the inner peripheral portion of the start liner tube 3 near the brim 2 as described above, the curable resin impregnated in the branch pipe lining material 25 is the resin absorbent material. 5 and the curable resin is cured, so that the resin absorbent material 5, the branch pipe lining material 25, and the collar 2 are joined and integrated.

Then, as described above, the branch pipe lining material 2
When 5 hardens, the main pipe 10 of the branch pipe lining material 25
If the tip portion projecting inside the (main pipe lining material 22) is cut as shown in FIGS. 10 and 11, the lining for the main pipe 10 and the branch pipe 11 is completed.

In the above, in the present embodiment,
Main lining material 22 and branch lining material 25 while barriering the ground water with main line 10 and branch pipe 11 into which the ground water enters by using start liner tubes 21 and 3, respectively.
Since the lining is constructed by using each of them, the thermosetting resin impregnated in the main pipe lining material 22 and the branch pipe lining material 25 does not come into direct contact with groundwater, and the curing failure of the thermosetting resin is prevented. Stripped main lining material 22
The branch pipe lining material 25 and the branch pipe lining material 25 each have a necessary and sufficient strength, and the main pipe lining material 22 and the flange 2 of the branch pipe starter 1 are joined and integrated to form the main pipe 1
It is possible to integrate the connecting portion between 0 and the branch pipe 11.

The pipe lining method according to the present invention can be similarly applied to a box culvert pipe having a rectangular cross section. An example thereof will be described based on FIGS. 12 and 13.

In FIG. 12, reference numeral 30 is a box culvert pipe, 31 is a branch pipe branched from the box culvert pipe 30, and the starter liner 1 with a collar for the branch pipe is similar to the above.
Start the liner tube 3 with the flange 2 of the box culvert pipe 30 in close contact with the peripheral edge of the branch pipe opening of the box culvert pipe 30 by fluid pressure into the branch pipe 31 from the box culvert pipe 30 side to the ground. The upper portion of the liner tube 3 is fixed with the hollow plug 26.

Next, as shown in FIG. 13, the box culvert pipe 30 was lined with the main pipe lining material 22, and the branch pipe opening of the hardened main pipe lining material 22 was cut out by punching. After that, the branch liner material 25 is applied to the start liner tube 3 by fluid pressure.
Insert it in the inside of the from the upper end side and harden it. After that, if the tip end of the hardened branch pipe lining material 25 is cut, the box culvert pipe 30 and the branch pipe 31 can be lined, and the same effect as described above can be obtained.

[0040]

As is apparent from the above description, according to the present invention, since the lining is carried out while the groundwater is barriered by the start liner tube to the branch pipe and the main pipe into which the groundwater enters, the branch pipe The curable resin impregnated in the lining material and the main lining material does not come into direct contact with groundwater, and a curing failure of the curable resin is prevented, and sufficient strength is secured for each lining material, and The effect that the connection portion of the main pipe and the branch pipe can be integrated can be obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a starter liner with a collar for a branch pipe according to the present invention.

FIG. 2 is a sectional view showing a pipe lining method according to the present invention.

FIG. 3 is a sectional view showing a pipe lining method according to the present invention.

FIG. 4 is a sectional view showing a pipe lining method according to the present invention.

FIG. 5 is a sectional view showing a pipe lining method according to the present invention.

FIG. 6 is a sectional view showing a pipe lining method according to the present invention.

FIG. 7 is a cross-sectional view showing a pipe lining method according to the present invention.

FIG. 8 is a sectional view showing a pipe lining method according to the present invention.

FIG. 9 is a cross-sectional view showing a pipe lining method according to the present invention.

FIG. 10 is a cross-sectional view showing a pipe lining method according to the present invention.

11 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 12 is a cross-sectional view showing an embodiment in which the pipe lining method according to the present invention is applied to a box culvert pipe.

FIG. 13 is a cross-sectional view showing an embodiment in which the pipe lining method according to the present invention is applied to a box culvert pipe.

FIG. 14 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

FIG. 15 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

FIG. 16 is a cross-sectional view showing a conventional pipe lining method (integrated lining method).

[Explanation of symbols]

 1 Starter liner with collar for branch pipe 2 Tsuba 3 Start liner tube 4 Pressure bag connecting tube 10 Main pipe 11, 31 Branch pipe 13 Pressure bag 21 Main line starter tube 22 Main pipe lining material 25 Branch pipe lining material

Claims (3)

[Claims] 1. A start liner tube having a diameter substantially the same as the diameter of the branch pipe and one end of a pressure bag connecting tube are attached to a brim formed in an arcuate curved surface along the inner diameter of the main pipe. A starter liner with a collar for branch pipes. 2. The start liner with a collar for a branch pipe according to claim 1, wherein each of the start liner tube and the pressure bag connecting tube has one end sandwiched between two flanges. 3. A branch pipe, which is constructed by attaching a start liner tube and a pressure bag connecting tube each having one end having a diameter substantially the same as the diameter of the branch pipe to a brim formed in an arcuate curved surface along the inner diameter of the main pipe. The pressure bag connecting tube of the flanged start liner is connected to a pressure bag and introduced into the main pipe, and the pressure is applied in a state where the flange of the flanged start liner for the branch pipe is closely attached to the peripheral edge of the branch pipe opening of the main pipe. After fluid pressure is applied to the inside of the bag, the start liner tube is inverted and inserted into the branch pipe from the main side toward the ground, then the upper part of the start liner tube is pulled and fixed, and the main start is performed while maintaining that state. The main lining material impregnated with a curable resin was reversely inserted into the main pipe by fluid pressure while the infiltration water was being barriered using a liner to cure and harden it. After cutting off the branch pipe opening portion of the main pipe lining material, the branch pipe lining material impregnated with a curable resin is reversely inserted into the inside of the start liner tube from its upper end side to cure it, A pipe lining method, characterized in that the main pipe and the branch pipe are lined by cutting the tip of the hardened branch pipe lining material.