JPH0813508B2 - Construction method of branch lining material - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a construction method of a branch pipe lining material which is lined on the inner surface of a branch pipe of sewerage, water supply, oil supply pipe or other existing pipes.

[Prior Art] For example, when the amount of water leaking or infiltrating a sewer pipe increases, the amount of treatment in the treatment plant increases accordingly. However, there is a limit to the treatment capacity of the treatment plant, and it is necessary to prevent the amount of treatment from increasing due to water leakage or infiltration.

Further, the sulfurous acid gas dissolved in the infiltrated water is converted into sulfuric acid through the bacteria, and the sulfuric acid corrodes the concrete pipe. Therefore, it is necessary to create an acid resistant barrier.

In recent years, for the purpose of reinforcing the strength of existing pipes such as sewers and waterworks, anticorrosion measures, water leakage and infiltration water measures, and improving the flow rate, etc., lining synthetic resin inside the existing main pipes and forming synthetic resin pipes inside The reversing lining method is in the limelight.

However, most of the infiltrated water enters from the joint portion of the mounting pipe branched from the sewer main. This phenomenon occurs mainly because the mortar filled in the joint portion of the mounting pipe cracks due to aging.

Conventionally, a water-stopping method for preventing infiltration of water from a joint portion of a mounting pipe and a crack of the mounting pipe itself is disclosed in, for example, Japanese Patent Laid-Open No. 62-
It is disclosed in Japanese Patent No. 284727.

In the method disclosed in Japanese Patent Laid-Open No. 62-284727, the lining material impregnated with a thermosetting resin is inverted / inserted into the mounting pipe so that the tip projects into the main pipe, and the inserted lining material is heat-cured. A synthetic resin pipe is formed in the mounting pipe. The part of this synthetic resin pipe that protrudes into the main pipe is cut and removed with a core cutter inserted into the main pipe, and then the lining material impregnated with thermosetting resin is inverted and inserted into the main pipe, and the inserted lining material is heat-cured. A synthetic resin pipe is formed in the main pipe.

After that, insert the semi-cured grout tube into the mounting tube until the tip reaches near the synthetic resin tube in the main tube,
The soft tube is turned upside down and inserted into the mounting tube while pressurizing the soft tube in parallel with the semi-rigid grout tube so that the turning section reaches the vicinity of the synthetic resin tube inside the main tube. While maintaining the pressure applied to this soft tube, inject the grout agent from the semi-cured grout tube into the void formed by the inversion part of the soft tube and the outer surface of the synthetic resin tube inside the main tube, and add it to the soft tube. The pressure is increased to allow the grout agent to penetrate the joint between the mounting pipe and the main pipe to stop water. After that, the soft tube is turned over and pulled out from the mounting tube, and the mounting tube mouth portion of the synthetic resin tube in the main tube is perforated.

[Problems to be Solved by the Invention] In the above-mentioned construction method, a lining material impregnated with a thermosetting resin is inserted into a mounting pipe and heat-cured to form a synthetic resin pipe. The total cooling time is about 15 hours when a polyester resin is used as the thermosetting resin. Further, even if the quick-drying type of epoxy resin is used, it takes about 6 to 8 hours, and the working time is long.

In addition, since the synthetic resin pipe is formed in the mounting pipe by the lining material with less elasticity that is impregnated with the thermosetting resin, when the mounting pipe is bent, wrinkles and protrusions are generated in the formed synthetic resin pipe, There is also a disadvantage that it may reduce the cross-sectional area of the pipe or impede the flow.

In addition, the grout agent is injected into the joint between the mounting pipe and the main pipe, but the path of infiltrating water leading to the joint is usually elongated and divided into several streaks, so it is possible to completely prevent intruding water from entering. In order to prevent it, it is necessary to inject and fill the grout agent into the path of the invading water.

However, the injection pressure of grout is usually 1 kgf / cm ²
Or, since the pressure is lower than that, it can be injected only into the entry port of the joint portion, and since no adhesion is involved, durability could not be expected. In addition, since the joint portion is the place where the amount of displacement due to crustal movement or dynamic loading is most likely to be the largest, it is difficult to prevent intruding water for a long period of time.

The present invention has been made to solve such disadvantages, and proposes a branch pipe lining material and a construction method thereof that can quickly and reliably line branch pipes such as sewer installation pipes and joint portions. The purpose is to do.

[Means for Solving the Problems] A method for applying a branch liner lining material according to the present invention is an outer layer film tube made of a synthetic resin having solvent resistance,
A method of applying a branch pipe lining material having a resin impregnated layer impregnated with an ultraviolet curable unsaturated polyester resin and an inner layer film tube that is adhered to the inner surface of the resin impregnated layer and has good light transmission, and has a brim at one end. The preliminary processing step consists of a medium or hard circular rubber plate in which the heating element is embedded and has a flange with an outer diameter larger than the outer diameter of the branch pipe. Using a jig consisting of a support plate that has a cylindrical projecting part that fits the inner surface of the flange of the pipe lining material, and a connecting tool at the center of the projecting part, emits light of a wavelength that is far from the ultraviolet wavelength range. Under the light source ,. A rope slidably attached to the connecting member of the support plate and a belt belt connected to the rope are passed through the lining material, and then the upper surface of the flange of the support plate and the lower surface of the flange of the lining material are bonded with a rubber adhesive. ,. A disk-shaped water-expandable rubber sheet is bonded to the upper surface of the brim of the bonded lining material, Pre-processing to store the entire lining material in the light-shielding tube is performed. In the main construction process after the pre-processing, While taking out the lining material from the light shielding tube, insert the lining material from the main pipe side and introduce it into the branch pipe, and apply the water-expandable rubber sheet on the upper surface of the flange of the lining material to the joint part of the branch pipe. The tip of the lining material that penetrates through the branch pipe is sealed, and a pressurized fluid is supplied into the lining material to bring the lining material into close contact with the branch pipe. A plurality of light emitting sources are attached to the rope at predetermined intervals, and the light emitting sources are installed in the lining material while pulling out the belt-shaped belt. UV light is emitted from the light emitting source to cure the lining material ,. After hardening the lining material, the heater of the support plate is energized to soften the rubber-based adhesive between the support plate and the flange of the lining material, peel the support plate from the lining material, and remove the support plate from the main pipe. Is characterized by.

[Operation] In the lining material used in the present invention, the resin-impregnated layer which is cured by ultraviolet rays is integrally formed by punching the glass fiber with the glass mat or the acrylonitrile felt to form the resin-impregnated layer with the tensile / compressive strength. , Enhances mechanical properties such as elastic modulus.

Further, by providing an outer layer film tube made of a synthetic resin having solvent resistance on the outer surface of the resin-impregnated layer on the side of the existing pipe, groundwater enters the resin-impregnated layer when the lining material is pressed against the inner surface of the existing pipe. This prevents the impregnated resin from seeping out to the outside.

Further, by providing an inner layer film tube having good light transmittance on the inner surface of the resin-impregnated layer, the resin-impregnated layer is irradiated without absorbing ultraviolet rays, and the resin is used when the lining material is expanded from the inside by water pressure or the like. Prevents fluid from entering the impregnated layer.

Further, by providing a collar at one end of the lining material, the end portion of the lining material covers the joint portion of the branch pipe.

Further, the branch pipe lining material of the present invention comprises a medium or hard circular rubber plate in which a heating element is embedded and has a collar having an outer diameter larger than the branch pipe outer diameter, and the branch pipe lining is provided at the center of the upper surface. A support plate having a fitting portion for fitting the inner surface of the brim of the material, a cable connecting to the heating element is connected to the lower surface, and a coupling tool at the center of the fitting portion, and a coupling tool for the supporting plate. Using a jig consisting of a rope slidably attached and a belt belt connected to the rope, a disc-shaped water-expandable rubber sheet is bonded to the upper surface of the lining of the lining material bonded to the upper surface of the rim of the support plate, This lining material is introduced into the branch pipe, the water-expandable rubber sheet on the upper surface of the brim of the lining material is applied to the joint portion of the branch pipe, and pressurized fluid is supplied into the lining material to bring the lining material into close contact with the branch pipe. After that, a plurality of light-emitting sources provided on the rope attached to the support plate at predetermined intervals are lined with lining material. Curing the lining material by ultraviolet rays emitted from the installation to the light emitting sources to form the synthetic resin tube branch pipe and in that the joint portion.

[Embodiment] FIG. 1 is a sectional view showing an lining material according to an embodiment of the present invention. As shown in the figure, the lining material 1 is a tube 2
And a collar portion 3 provided at one end of the tube 2.

As shown in the perspective view of FIG. 2, the tube 2 is an outer layer film tube 4 formed of a synthetic resin film such as nylon or vinylon having excellent solvent resistance, and a resin impregnated layer adhered to the inner surface of the outer layer film tube. 5 and resin impregnated layer 5
The inner layer film tube 6 is made of a synthetic resin film such as nylon that is adhered to the inner surface of the sheet and has good light transmittance and does not pass water.

The resin-impregnated layer 5 is a layer that determines the thickness of the synthetic resin tube after molding. As shown in the perspective view of FIG. 3, a glass fiber felt alone or a glass mat or acrylonitrile felt on both sides or one side of the glass fiber felt 7. The reinforcing layer 8 made of is integrally formed by punching.
This resin-impregnated layer 5 is impregnated with an ultraviolet-curable unsaturated polyester resin containing a photoinitiator that absorbs 250 to 450 nm over a long wavelength spectrum having a large penetration depth of near-ultraviolet rays to a visible light region. The ultraviolet-curable unsaturated polyester resin impregnated in the resin impregnated layer 5 is made of, for example, neopentyl glycol resin, and the photoinitiator is generated by, for example, acylphosphine oxide and a solvent, or acylphosphine oxide and light in the thickness direction. It is composed of a peroxide catalyst that assists heat curing with heat, a solvent, etc. This resin preferably has a viscosity of 1 to 40 poise at a temperature of 20 ° C in order to obtain good impregnation property and thickness retention property in the resin impregnation layer 5. .

As shown in the sectional view of FIG. 4, the collar portion 3 is composed of an outer layer film tube 4, a resin-impregnated layer 5 and an inner layer film tube 6 like the tube 2, and has a diameter of, for example, 20 to 50 mm from the sewer installation pipe at one end. Has a large circular brim 9.

Next, a method for manufacturing the lining material 1 configured as described above will be described.

First, the resin-impregnated layer 5 is sealed with the outer film tube 4 and the inner film tube 6 to form the tube 2 having a peripheral length of 90 to 98% of the inner circumference of the branch pipe. In a room having a light source that emits light having a wavelength apart from the ultraviolet region, the tube 2 is made to have a negative pressure in the resin impregnated layer 5 of the tube 2 by a vacuum pump to be impregnated with the ultraviolet curable unsaturated polyester resin.

Similarly, a flange portion 3 having a circular flange 9 formed of the outer film tube 4, the resin-impregnated layer 5, and the inner film tube 6.
Then, the resin impregnated layer 5 of the collar portion 3 is impregnated with the ultraviolet curable unsaturated polyester resin. An ultraviolet spot light having a width of about 5 mm is irradiated over the entire outer peripheral end of the collar 9 of the collar 3 to cure the resin impregnated layer 5 at the edge of the collar 9.

Thereafter, the tube 2 and the collar portion 3 are joined together to form the lining material 1 having the collar portion 9 at the tip as shown in FIG.
Since the lining material 1 formed in this way is cured by irradiation with ultraviolet rays, it is stored by inserting it into a black synthetic resin tube or a cloth bag that does not transmit ultraviolet rays in a circularly wound or folded state.

Next, a construction method for forming a synthetic resin pipe on the inner surface of the mounting pipe branched from the main pipe of the sewer by the lining material 1 configured as described above will be described.

This work consists of preliminary processing to attach the jig for the lining material 1,
This is divided into main construction in which the pre-processed lining material 1 is inserted into the mounting pipe to form a synthetic resin pipe.

FIG. 5 is a cross-sectional view showing a support plate 10 which is a jig used for preliminary processing. The support plate 10 is made of a medium or hard disc rubber plate and has a collar 11 having a diameter equal to or slightly larger than that of the collar 9 of the lining material 1, and a collar 9 of the lining material 1 at the center of the upper surface.
It has a cylindrical protrusion 12 that fits with the inner surface. A heater 13 connected to a cable 14 is embedded in the inside of the support plate 10, and a coupling tool 15 made of, for example, a coupling shackle is fixed to the center of the protruding portion 12.

As shown in the perspective view of FIG. 6, a rope 16 having a length longer than the entire length of the mounting pipe is slidably attached to the connector 15 of the support plate 10, and one end of the rope 16 has a width of about 100 mm and a long length. A belt-shaped belt 17 made of, for example, a nylon sling belt, whose length is longer than the entire length of the mounting tube, is fixed.

The pre-processing is performed in a room having a light source that emits light having a wavelength apart from the ultraviolet region in order to prevent the ultraviolet-curable unsaturated polyester resin impregnated in the resin-impregnated layer 5 of the lining material 1 from being cured.

First, attach the rope 16 and the belt belt 17 to the collar portion 3 of the lining material 1.
And the inside of the lining material 1 is penetrated. Then, the upper surface of the collar 11 of the support plate 10 or the lower surface of the collar 9 of the lining material 1 is coated with a rubber-based adhesive or pressure-sensitive adhesive having a maximum operating temperature of 80 ° C. or less, and the lining material 1 is fitted to the protruding portion 12 of the support plate 10. The collar 9 of the lining material 1 and the collar 11 of the support plate 10 are adhered to each other for positioning, and as shown in the perspective view of FIG.
Unify. Then, the tip of the lining material 1 from which the rope 16 and the belt belt 17 are exposed is closed with a tape or the like, and the rope 16 and the belt belt 17 are fixed so as not to move.

Next, as shown in the partial sectional view of FIG.
A disk-shaped water-expandable rubber sheet 18 having a diameter larger than that of the collar 9 is adhered to the upper surface of the collar 9, and the entire lining material 1 is stored in the light-shielding tube to complete the preliminary processing.

The operation of forming a synthetic resin in the mounting pipe with this lining material 1 will be described with reference to FIGS. 9 to 11.

First, the lining material 1 is carried into the manhole 21 of the main pipe 20 with the lining material 1 stored in the light shielding tube. next,
The index rope 24 is inserted from the mast 23 of the mounting pipe 22 through the mounting pipe 22 and the main pipe 20 to the manhole 21, and the rope 16 fixed to the lining material 1 and the tip of the belt-shaped belt 17 are fixed to the index rope 24. While gradually pulling up the index rope 24 from the space 23, the lining material 1 is taken out from the inside of the light shielding tube, and the lining material 1 is inserted into the dark main pipe 20 as shown in FIG. Then, when the tips of the rope 16 and the belt belt 17 appear in the mast 23, the rope 16 and the belt belt 17 are pulled up at the same time, and the water-expandable rubber sheet 9 adhered to the upper surface of the collar 9 of the lining material 1 is attached as shown in FIG. Apply to the joint part of the mounting pipe 22 as shown in. Thus, when the lining material 1 is inserted into the main pipe 20 and the mounting pipe 22, since the wide belt-shaped belt 17 penetrates through the lining material 1, the flexible lining material 1 should be inserted without being twisted. You can

In this state, the index rope 24 is removed from the rope 16 and the belt belt 17, and the airtight lid 25 having the passage hole of the rope 16 and the belt belt 17, the water supply port and the exhaust port is fixed to the tip of the lining material 1. Next, while pulling the rope 16 and the belt belt 17 at the same time, the water expansion rubber sheet 9 is pressed against the joint portion of the mounting pipe 22, water is injected into the lining material 1 from the water supply port of the airtight lid 25, and exhausted from the exhaust port. Meanwhile, the lining material 1 is filled with water.
When the lining material 1 is filled with water, the exhaust port is closed to increase the water pressure in the lining material 1 to about 0.1 to 1 kgf / cm ² , and the lining material 1 is brought into close contact with the mounting pipe 22. Attach this lining material 1 to the mounting pipe 22
The outer layer film tube 4, the resin-impregnated layer 5, and the inner layer film tube 6 are flexible when the inner layer material 1 is adhered to
Therefore, even if the mounting tube 22 is bent, the mounting tube 22 can be closely adhered to the shape, and the inner surface can be formed into a smooth shape without wrinkles. Moreover, since the resin impregnated layer 5 is covered with the inner layer film tube 6 and the outer layer film tube 4 when the inner lining material 1 is brought into close contact,
This prevents pressurized water and ground water from entering the resin-impregnated layer 5 and prevents the impregnated resin from leaching to the outside.

Next, a plurality of light emitting sources 26 that emit ultraviolet rays at predetermined intervals at the tip of the rope 16 in a state where the lining material 1 is filled with water.
And the light emitting source 26 is installed in the lining material 1 while pulling out the belt-shaped belt 17. Then, by energizing the light emitting source 26, the inner surface of the lining material 1 is irradiated with ultraviolet rays from the light emitting source 26. The irradiated ultraviolet rays are hardly absorbed when passing through the inner layer film tube 6 having a good light transmittance, and enter the resin impregnated layer 5 having glass fiber as a base material. The photoinitiator impregnated in the resin-impregnated layer 5 absorbs this ultraviolet ray and causes a radical polymerization reaction to generate heat. This heat further activates the peroxide catalyst molecules to accelerate the curing of the ultraviolet curable unsaturated polyester resin, and cure the resin impregnated layer 5 in a short time of about 3 minutes. Since the heat generated when the ultraviolet rays are emitted from the light emitting source 26 is absorbed by the water filled in the lining material 1, it is prevented that the heat from the light emitting source 26 melts the lining material 1.

After the lining material 1 is hardened, the rope 16 and the belt-shaped belt 17 are cut at the connecting portion, the light source 26 is pulled out, and then the support plate 10
The heater 13 is energized from the power source 27 via the cable 14 on the main pipe 20 side to heat the support plate 10, thereby softening the rubber adhesive that bonds the support plate 10 and the lining material 1. Therefore, by pulling out the cable 14, the support plate 10 is peeled off from the lining material 1 and the support plate 10 is taken out from the main pipe 20. As shown in FIG.
It is possible to form the synthetic resin pipe 28.

Then, by forming the synthetic resin pipe 29 in the main pipe 20, the joint portion 22a of the mounting pipe 22 can be completely covered.
Then, since the water-swellable rubber sheet 18 is inserted between the joint portion 22a and the synthetic resin pipes 28, 29, even if intruding water enters from the joint portion 22a, the water-swellable rubber sheet 18 expands. It prevents invading water from entering from the joint portion of the synthetic resin pipes 28, 29. Further, the rubber adhesive remaining on the lower surface of the collar 9 is re-bonded to the outer surface of the synthetic resin pipe 29 of the main pipe to assist the water blocking effect.

In the above embodiment, the case where the lining material 1 is directly pulled by the index rope 24 to be inserted into the main pipe 20 and the mounting pipe 22 has been described, but as shown in FIG. 12, the fixing of the elevator 31 having the sled 30. Fix the support plate 10 to the stand 32, and
By moving the sled 30 with the index rope 33 at the same time as pulling up, the lining material 1 can be inserted into the main pipe 20 more easily.

Then, in this case, as shown in FIG. 13, when the support plate 10 reaches directly below the joint portion 22a of the mounting pipe 22, the elevator 31
Is operated to raise the fixing base 32, the water-expandable rubber sheet 9 adhered to the upper part of the brim of the lining material 1 can be more reliably pressed against the joint portion 22a.

Further, in the above-described embodiment, the case where the columnar protrusion 12 is provided on the support plate 10 has been described, but the shape of the protrusion 12 is an ellipse or a circle depending on the shape of the joint portion previously examined by the television camera. It is good to choose

[Advantages of the Invention] The method for constructing a branch pipe lining material of the present invention comprises a medium or hard circular rubber plate in which a heating element is embedded and which has a flange having an outer diameter larger than the branch pipe outer diameter. A support plate having a protrusion fitting the inner diameter of the collar of the branch pipe lining, a cable connecting to the heating element is connected to the lower surface, and a support plate having a connector in the center of the protrusion, and a connector for the support plate. Using a jig consisting of a rope slidably attached and a belt belt connected to the rope, a disc-shaped water-expandable rubber sheet is bonded to the upper surface of the lining of the lining material bonded to the upper surface of the rim of the support plate, This lining material is introduced into the branch pipe, the water-expandable rubber sheet on the upper surface of the brim of the lining material is applied to the joint portion of the branch pipe, and pressurized fluid is supplied into the lining material to bring the lining material into close contact with the branch pipe. After that, inside the rope attached to the support plate, multiple light-emitting sources It is installed in the upholstery material and the flexible inner lining material is hardened by the ultraviolet rays emitted from the light source to form the synthetic resin tube in the branch pipe and the joint part, so a synthetic resin tube without wrinkles, protrusions, etc. can be formed in a short time. Can be formed.

Further, since the water-expandable rubber sheet can be inserted between the joint portion and the synthetic resin pipe, it is possible to more reliably prevent the entering water.

[Brief description of drawings]

FIG. 1 is a sectional view showing a lining material according to an embodiment of the present invention, FIGS. 2 and 3 are perspective views showing a tube of the above embodiment, and FIG. 4 is a sectional view showing a collar portion of the above embodiment. Figure, fifth
FIG. 6 is a cross-sectional view showing a support plate used in a construction method according to an embodiment of the present invention, FIG. 6 is a perspective view showing a jig used in the construction method, and FIGS. 7 and 8 show the construction method. Fig. 7 shows a pre-processed state, Fig. 7 is a perspective view showing a state in which the lining material is attached to the jig, and Fig. 8 is a partial sectional view showing the tip of the lining material, Fig. 9, Fig. 10, Fig. 11 and Fig. 11. Each of the figures is a sectional view showing the main construction of the above construction method, and FIGS. 12 and 13 are sectional views showing other construction methods. 1 …… lining material, 2 …… tube, 3 …… collar part, 4 ……
Outer layer film tube, 5 ... Resin impregnated layer, 6 ... Inner layer film tube, 8 ... Reinforcing layer, 9,11 ... Tsuba, 10 ...
Support plate, 12 ... projection part, 13 ... heater, 14 ... cable, 15 ... connector, 16 ... rope, 17 ... belt belt,
18 …… Water-expandable rubber sheet, 20 …… Main pipe, 22 …… Mounting pipe, 24 …… Index rope, 25 …… Airtight lid, 26 …… Luminescent source,
28,29 …… Synthetic resin pipe, 30 …… Sled, 31 …… Elevator.

Claims (1)

[Claims] 1. An outer-layer film tube made of a synthetic resin having solvent resistance, a resin-impregnated layer impregnated with an ultraviolet-curable unsaturated polyester resin, and an inner-layer film tube which is adhered to the inner surface of the resin-impregnated layer and has good light transmittance. A lining material for a branch pipe having a brim at one end, comprising a pre-processing step and a main construction step, in which the heating element is embedded and the outer diameter of the collar is larger than the outer diameter of the branch tube. Made of a medium or hard circular rubber plate having a cylindrical protruding portion that fits the inner surface of the collar of the branch pipe lining material at the center of the upper surface, and a support plate having a connecting tool at the center of the protruding portion. Using a jig consisting of, under a light source that emits light having a wavelength apart from the ultraviolet wavelength region ,. A rope slidably attached to the connecting member of the support plate and a belt belt connected to the rope are passed through the lining material, and then the upper surface of the flange of the support plate and the lower surface of the flange of the lining material are bonded with a rubber adhesive. ,. A disk-shaped water-expandable rubber sheet is bonded to the upper surface of the brim of the bonded lining material, Pre-processing is performed by storing the entire lining material inside the light-shielding tube. In the main construction process after the pre-processing, While taking out the lining material from the light-shielding tube, insert the lining material from the main pipe side and introduce it into the branch pipe, and apply the water-expandable rubber sheet on the upper surface of the flange of the lining material to the joint portion of the branch pipe. The tip of the lining material that penetrates through the branch pipe is sealed, and a pressurized fluid is supplied into the lining material to bring the lining material into close contact with the branch pipe. A plurality of light emitting sources are attached to the rope at predetermined intervals, and the light emitting sources are installed in the lining material while pulling out the belt-shaped belt. UV light is emitted from the light emitting source to cure the lining material ,. By energizing the heater of the support plate after curing the lining material, the rubber joint adhesive between the support plate and the flange of the lining material is softened, the support plate is peeled from the lining material, and the support plate is taken out from the main pipe. A method of constructing a branch pipe lining material, which is characterized in that