JPS62284727A - Method for lining sewage pipe with branch part - Google Patents

Abstract

PURPOSE:To prevent subsoil water and rain water from mixing with soil water by a method wherein waterproofing agent is poured through a semirigid tube into a space, which is formed between the portion turned inside out of a soft tube and the outer surface of a lining material at a branch part, and, after that, the interior of the soft tube is pressurized and next the soft tube is reversely turned outside in order to be drawn out of a branch pipe and finally the lining material at the branch part is bored. CONSTITUTION:Under the state that the fluid pressure in a lining material 6 is kept on, waterproofing agent 16 is poured through a semirigid tube 12 into a space, which is formed between the portion turned inside out 15 of a soft tube 13 and the outer surface of a lining material 6 at a branch part. Under the state that the waterproofing agent 16 fills the space, fluid pressure is applied to the interior of the soft tube 13, which has been inserted in a mounting tube 2, so as to take the tube 13 out of the mounting tube 2 by turning the tube 13 outside in the reverse way of the former insertion of the tube 13. In addition, excess waterproofing agent 16 left at the branch part is removed by being sucked through the semirigid tube 12. Further, the terminal parts of the lining material 6 are cut off at the opening parts to manholes 4, each of which is provided at each terminal of a branch tube 3, so as to seal the terminals by proper means. After that, the lining material 6 at the branch part between the tube 3 and the mounting tube 2 is bored so as to communicate the mounting tube 2 with the branch tube 3.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention relates to a method for lining the inner surface of a sewer pipe buried underground, and particularly relates to a method for lining the inner surface of a sewer pipe buried underground. The present invention relates to a method for application to sewer pipes having the following characteristics.

As shown in Figure 5, the sewer system usually collects sewage in a sewage basin 1, and the sewage basin 1 has an inner diameter of about 150 mm (S).
A branch pipe 3 with an inner diameter of approximately 250 to 30 Qmm is inserted through the J pipe 2.
It is connected to the. Manholes 4 are formed in some places in the branch pipe 3, and the manholes 4 are further connected to a large-diameter wooden pipe 5.

The sewage first flows into the branch pipe 3 via the attached pipe 2, roughly flows into the wood pipe 5 through the manhole 4, flows through the main pipe 5, and is collected at the treatment plant.

By the way, clay pipes, ceramic pipes, concrete pipes, etc. are usually used as sewer pipes. The components of sewage are not always constant;
Since it sometimes contains corrosive acids and alkalis, it is difficult to use gold FATA, and therefore corrosion-resistant pipes such as those mentioned above are used.

However, since these sewer pipes fit into the joint part (the end of one pipe fits into the large diameter part formed at the end of the other pipe), they are easy to support and are easily supported by external forces. Therefore, rainwater can enter underground holes through loose joints or damaged parts, increasing the amount of sewage.

Originally, underground groundwater and rainwater can be discharged directly into rivers and other places without any problem, but if it gets mixed in with sewage, it is impossible to separate it, and these groundwater, rainwater, etc. All wastewater, including water, must be treated properly as wastewater.

Therefore, the amount of sewage that is subject to sewage treatment will increase significantly, and sewage 11! A large scale is required as a production crystal for L science.

Therefore, by preventing groundwater and rainwater from flowing into the sewer pipes, and by dyeing only the water that needs to be treated in a small amount at the treatment plant, the sewage that is necessary in a small-scale sewage treatment facility can be reduced. It is possible to process everything. Therefore, in order to prevent underground water from flowing in and covering the pipe, it is necessary to line the sewer pipe with a lining.

Conventional Technology Conventionally, as a method for lining pipelines buried underground, a cylindrical flexible lining material coated with 4ηi of adhesive on the inner surface is used to line the pipeline by turning the inner and outer surfaces inside out using fluid pressure. A method is known in which the lining material is inserted into the inside of the tube, the turned-over lining material is pressed onto the inner surface of the pipe line using the fluid pressure, and the lining material is bonded via the adhesive. This method eliminates the need for leaks in the buried pipeline, and allows the entire length of the pipeline to be lined by excavating only both ends of the construction section.
In addition, it is a method that can line long pipes in a short period of time, and has attracted particular attention in recent years as an extremely simple method. Although this method is generally applied to gas pipes, water pipes, etc., it is basically applicable to sewer pipes as well.

Problems to be solved by the invention However, when applying the above method to sewer pipes,
A major problem arises with the sewer pipes. However, in gas pipes and water pipes, the fluid flowing inside is under high pressure, and the lining material is expanded by that pressure and is constantly in contact with the inner surface of the pipe. Become. Therefore, in these pipes, there is almost no need to consider that the lining material will peel off from the inner surface of the pipe due to external pressure, and the lining material will prevent the internal fluid from leaking to the outside from the damaged part. effectively prevented.

However, in the case of a sewer pipe, there is no pressure inside the pipe, but on the contrary, external pressure is applied by external water such as groundwater or rainwater. Furthermore, sewer pipes do not have a high degree of watertightness as described above. Therefore, these external water flows into the pipe through joints and cracks in the pipe and applies external pressure to the lining material, so the lining material used to line the pipe can withstand these external pressures19. It has to be something.

In addition, as mentioned above, outside water constantly flows into sewer pipes through loose or cracked joints, and water flows in during lining construction, making the inner surface of the pipe constantly wet. Therefore, it is extremely difficult to firmly attach the lining material to the inner surface of the pipe. Moreover, as mentioned above, water flows in through the joints and cracks, so the water peels off the weak adhesive between the pipe line and the lining material, and flows between the lining material and the pipe line. In particular, in the branch pipe 3 of the sewer pipe, the attachment pipe 2 branches in the middle, and in order to make the attachment pipe 2 pass through the branch pipe 3 at the branching point, the branch pipe 3 is lined. A through hole is made in the lining material. Therefore, as mentioned above, the water that diffuses between the branch pipe 3 and the lining material reaches the branch part (through hole) and flows into the branch pipe 3 from there, increasing the amount of sewage. As a result, the meaning of lining sewer pipes, which can have the effect of preventing an increase in the amount of sewage, is lost.

Also, even if branch pipe 3 is properly lined, attachment pipe 2
There is nothing that can be done to prevent water from flowing in through loose joints or cracks. The attachment pipe 2 is short in length, and its tip branches off from the branch pipe 3, so if you try to line the attachment pipe 2 using the conventional method, you will have to dig up the branch and install it. The pipe 2 must be removed from the branch pipe 3 and lined, which is inefficient. Especially Tori (
1. A large number of pipes 2 are installed along branch pipes 3. Q.If you were to dig up the branch parts of these pipes 2 one by one, you would have to dig out the branch pipes 3 along their entire length. The biggest advantage of the above method is lost, as is the case with .

The present invention has been developed in view of the above circumstances; after lining, the lined shrine can withstand external water pressure due to underground water, mountain water, etc.; The purpose of the present invention is to provide a method for lining a lining structure that prevents water from entering sewage.

Further, the purpose of the pond of the present invention is to line the base pipes such as branch pipes 3 and the like in the sewer pipe to prevent the infiltration of underground water from the base pipes, and to Tori branched from (=I
The purpose is to effectively prevent the infiltration of groundwater etc. from branch pipes such as the pipe 2, and reduce the hanging of sewage as much as possible.

IF! 1ff IR Solution (Part 1) Therefore, the first invention of the present application is directed to a sewage f2 pipe having a base pipe and a branch pipe branching from the middle of the pipe (to the inner surface of the base pipe). A method of lining the interior with a flexible cylindrical woven or non-woven material.
A reaction-curing adhesive is applied to the inner surface of a lining material formed by forming a flexible airtight layer made of rubber or synthetic resin on the outer surface of a fibrous reinforcement such as, and the fibrous reinforcement is impregnated with the adhesive. Then, the lining material is turned over inside and out using a fluid pressure higher than the water pressure outside the base pipe. 1 tube, and a semi-rigid tube is inserted into the branch tube from its open end so that its tip reaches the bifurcation between the base tube and the branch tube, and parallel to the semi-rigid tube. Inserting the soft tube while turning the inner and outer surfaces inside out using fluid pressure, bringing the turned-over part to the branch part, and then curing the adhesive while maintaining the fluid E in the lining cage,
A water stop agent is injected from the semi-rigid tube into the space between the turned-over part of the soft tube at the branch part and the outer surface of the lining material, pressurizes the inside of the soft tube, and then turns the soft tube over. This method is characterized in that the center of the branch pipe is cut out, and then the lining material of the branch part is perforated.

Hereinafter, a case where the method of the present invention is applied to the branch pipe 3 as the sewer pipe will be described. As shown in Fig. 1, manholes 4 are formed in the branch pipe 3 every 100 m from the +m PJ, and the area between the - manhole 4 and the next manhole 4 is lined in one work. An attachment pipe 2 as a branch pipe is branched and attached to the branch pipe 3 at an appropriate location, and the open end of the attachment pipe 2 is connected to the sewage tank vl.

In the following explanation, the branch pipe 3 is used as the base pipe, and the attachment pipe 2 is used as the base pipe.
The present invention will be explained as a method of lining the branch @ 3 by using the main pipe 5 as a branch pipe, but by using the main pipe 5 as a base pipe and making the pipe from the manhole 4 to the main pipe 5 a branch pipe, the main pipe 5 can be lined. It goes without saying that the method can be applied in exactly the same way, and the same applies to the second and third inventions of the present application, which will be described later.

First, the lining 446 is inserted into the branch pipe 3 while being turned over using fluid pressure. The lining material 6 is not shown in Figure 2.
A flexible airtight layer 8 made of rubber or synthetic resin is formed on the outer surface of a fibrous reinforcing body 7 such as l'lr or nonwoven fabric, and a reaction-curing adhesive is applied to the inner surface of the layer 8. The fibrous reinforcement 7 is impregnated with the adhesive.

Then, this lining material 6 is inserted into the branch pipe 3 while turning the inner and outer surfaces inside out using fluid pressure. As shown in FIG. 1, the tip of the lining material 6 is fixed in an annular manner within the manhole 4 at one end of the branch pipe 3, and fluid pressure is applied to the rear part of the annular fixed portion 9 from the pressure vessel 1o. As a result, the lining material 6 is folded back so that the inside becomes the outside at the folded part 11 formed on the annular fixed part, and the folded part 11 advances along the branch pipe 3 from the one end to the other end.

As a result, the lining material 6 is turned over over its entire length, and the branch pipe 3 is
The lining material 6 that has been inserted over the entire length of the branch pipe 3 and turned inside out is pushed against the inner surface of the branch pipe 3 by the fluid pressure.

The fluid pressure when turning over the lining material 6 needs to be higher than the pressure of water such as groundwater or rainwater outside the branch pipe 3. Depending on the thickness of the water pressure outside the branch pipe 3 and the depth from the ground where the branch pipe 3 is buried, it can be calculated as 0.1 kq4 per 1 m, and the fluid pressure is more than that. A slightly higher pressure is sufficient.

Next, connect the thin semi-rigid tube 1 to the mounting pipe 2 from its open end.
2 is inserted, and its tip reaches the branching part between the branch pipe 3 and the attachment pipe 2. The semi-rigid tube 12 is made of polyethylene, nylon, polyurethane, polyvinyl chloride, etc., and has enough flexibility to be inserted along the bend of the mounting tube 2, and can be easily applied to external pressure. It has enough rigidity to not be crushed.

Next, parallel to the semi-rigid tube 12, the soft tube 13 is inserted into the attachment tube 2 from its open end while being turned over by fluid pressure. The soft tube 13 is a flexible plastic tube or reinforced with cylindrical fabric, and has an inner diameter approximately equal to the inner diameter of the attachment tube 2.

This soft gouve 13 is wound into a coil to form a pressure vessel 1.
4, and its terminal is placed in the frontage of the pressure vessel 14 at 11
fixed in shape. In this state, pressurize the inside of the pressure vessel 14 to apply fluid pressure to the annular fixing part, and insert J3 into the inside-out part 15 formed there, and turn the soft tube 13 over so that the inside becomes the outside. The inverted portion 15 is inserted into the attachment tube 2 and advanced along the attachment tube 2. Then, as shown in FIG. 1, let the turned-over portion 15 reach the branching point between the attachment pipe 2 and the branch pipe 3. As the turned-over portion 15 advances, the air inside the mounting tube 2 flows from the semi-rigid tube 12 to tJ.
1 is issued.

In the above explanation, after the lining material 6 is turned over and inserted into the branch pipe 3, the half (i!) tube 12 is inserted into the f pipe 2.
, then turn the soft tube 13 over and insert it into the mounting tube 2.
However, regardless of the order of these steps, the lining material 6 and semi-rigid tube 1
2 and the soft tube 13 are the branch pipe 3 and the attachment pipe 2, respectively.
It is fine if it is inserted through.

In this state, while increasing the fluid pressure inside the lining material 6, the water sealing agent 16 is applied from the semi-rigid tube 12 to the large turned portion 15 of the soft tube 13 at the branching part and the outer surface of the lining material 6. Inject into the space between. The water stop agent 16 is a resin that hardens by reacting with water, and a low-viscosity hydrophilic polyurethane resin stock solution is suitable.

As this polyurethane resin, in particular, an organic isocyanate polyether diol-based prepolymer or an organic isocyanate polyether triol-based prepolymer,
A polyurethane resin consisting of toluene diisocyanate is suitable. In this polyurethane resin, the prepolymer and water react to form urea bonds, and 1-luene diisocyanate acts as a crosslinking agent to generate carbon dioxide gas and harden, resulting in an insoluble hydrated gel with Gol\-like elasticity. form the body.

Attachment pipe 2 with water stopper 16 placed in the space of the branch part.
When fluid pressure is applied to the inside of the soft tube 13 inserted through the tube, the soft tube 13 that has already been turned over is pressed against the inner surface of the attachment tube 2, and the soft tube 13 that has not yet been turned over is turned over at the turned-over portion 15, and the turned-over portion 15 is turned over. A force trying to move forward acts and pressurizes the water stop agent 16. Then, the water stop agent 16 spreads along between the attachment pipe 2 and the lining material 6,
It penetrates into loose joints and cracks near branch points, where it hardens when it comes into contact with water.

Then, the adhesive impregnated into the fibrous reinforcing body 7 of the lining material 6 is reacted and cured by leaving it in this state or by passing a heating fluid into the lining material 6 and heating it.

As a result, the lining 446 is adhered to the inner surface of the branch pipe 3, and as the adhesive impregnated into the fibrous reinforcing body 7 hardens, the lining material 6 forms a rigid pipe inside the branch pipe 3.

Once the adhesive has completely hardened, remove the soft tube 13 from the mounting tube 2 while turning it over so that the outside is facing inside, contrary to the previous insertion, and remove the excess water stopper 16 remaining at the branch. It is removed by suction using the semi-rigid tube 12. Further, the end portion of the lining material 6 is cut at the opening to the manhole 4 at the end of the branch pipe 3, and the end is sealed by an appropriate means. After that, a hole is made in the lining material 6 at the branching part between the branch pipe 3 and the attachment pipe 2, and the attachment pipe 2 is passed through the branch pipe 3.

Effect (Part 1) In the method 4'3 of the present invention, the lining material 6 is inserted into the branch pipe 3 while being turned over by fluid pressure, so water that has flowed into the branch pipe 3 and accumulated therein is removed from the lining material 6. Water is not sealed between the branch pipe 3 and the lining material 6, and the lining material 6 is directly crimped onto the inner surface of the branch pipe 3.

Furthermore, since a fluid pressure nof higher than the water pressure outside the branch pipe 3 is acting inside the lining material 6 which has been turned over, the lining material 6 closes the cracked portions of the joint portion of the branch pipe 3. External water is prevented from entering the inside of the branch pipe 3 when the lining material 6 is crimped.

Then, since the adhesive is cured while applying fluid pressure to the inside of the lining material 6 that has returned to flames, external water will not enter and cover the inside of the branch pipe 3 during this time. Rather, lining material 6
Since the fluid pressure inside is higher than the water pressure outside, the lining material 6
The adhesive impregnated into the fibrous reinforcing body 7 enters into the cracks between the loosened parts of the joint and hardens there, thereby acting to close them.

However, even when the lining 6 is bonded to the inner surface of the branch pipe 3 in this way, water cannot enter between the branch pipe 3 and the lining material 6 from the outside in the lined branch pipe 3. It is difficult to make it completely clear. That is, since the inner surface of the branch pipe 3 is wet when the lining material 6 is inserted,
The lining material 6 does not firmly adhere to the branch pipe 3, and the lining material 6 constitutes a rigid pipe due to the adhesive impregnated in the 1alD7 reinforcing body 7, and the pipe is fitted inside the branch pipe 3. When the branch pipe 3 and the lining material 6 are joined together, a weakly bonded part between the branch pipe 3 and the lining material 6 may peel off, resulting in a slight gap.

In addition, it is not possible to completely fill in the gaps due to adhesive that has penetrated into loose joints or cracks, and it is inevitable that some water will enter the gap between the branch pipe 3 and the lining cage 6. . Moreover, it is impossible to prevent water from entering through newly formed cracks in the lining.

Therefore, it is inevitable that water such as groundwater or rainwater outside the branch pipe 3 will enter between the branch pipe 3 and the lining material 6, and that water will be absorbed by the weak adhesion between the branch pipe 3 and the lining material 6. Diffuse through the parts.

Here, in the present invention, a water sealing agent 16 is sealed in the space between the inside out part 15 of the soft tube 13 and the outer surface of the lining material 6 at the branching part of the attachment pipe 2 and the branch pipe 3, and 13 and pressure is applied to the water stop agent 16, the water stop agent 1G spreads between the branch pipe 3 and the lining material 6 around the branch, and loosens the joint near the branch. Penetrates between parts and cracks.

In this state, as mentioned above, it is inevitable that water will infiltrate through loose joints or cracks in the branch pipe 3 and diffuse through areas where the adhesive strength between the branch pipe 3 and the inner lining 6 is weak. When this water reaches the vicinity of the branch and comes into contact with the water stop agent 16, the water stop agent 16 reacts with the water and hardens, forming an insoluble hydrogel having rubber-like elasticity. The gel body blocks water and prevents it from further diffusing and reaching the branch.

In addition, in the vicinity of the branch, the water stop agent 16 has also penetrated into the loose parts of the joints and cracks, so the water that flows in from here immediately comes into contact with the water stop agent 16.
hardens, effectively preventing the intrusion of external groundwater, etc.

Therefore, at the branching point between the branch pipe 3 and the attachment pipe 2, the branch pipe 3
and the lining material 6 are completely sealed,
Water that flows into the space between the branch pipe 3 and the lining material 6 from the middle of the branch pipe 3 is diffused over the length of the branch pipe 3, but is blocked by the water stop agent 16 at the branch part in the middle. This prevents underground water and rainwater from entering the sewage, since the inflow 1 does not flow into the branch pipe 3 through the hole drilled in the lining material 6 of the branch.

By the way, in the present invention, as the soft tube 13,
It is preferable to form spiral protrusions or grooves on the outer periphery after turning over (the inner surface before turning over). In this way, when the water stop agent 16 is injected from the semi-rigid tube 12 and the soft tube 13 is pressurized, the water stop agent 16 is applied to the branch pipe 3 and the lining material 6 near the branch part as described above. At the same time, a part of it flows back along the protrusion or groove, and the soft tube 1
3 and the inner surface of the attachment pipe 2, and penetrates into loose joints and cracks in the attachment pipe 2 at J5, thereby preventing water from entering from these locations.

In this case, it is desirable to fit a rubber ring on the inner surface of the upper end of the mounting pipe 2 to prevent the backflowing water stopper 16 from turning into sewage. .

The first result of the invention (Part 1) According to the present invention, groundwater outside the branch pipe 3! ) Since the lining material 6 is turned inside out and inserted into the branch pipe 3 using a fluid pressure higher than the water pressure of rainwater, etc., even in pipes where water is flowing in from loose or cracked joints of the branch pipe 3. The lining material 6 can be turned inside out while cutting off the inflowing water. In addition, since the adhesive is cured while maintaining the fluid pressure, it is possible to push the adhesive into gaps between loose joints and cracks in the branch pipe 3, fill those gaps, and significantly reduce water intrusion. can.

In addition, in the sewer M pipe lined according to the present invention, the fibrous reinforcing body 7 of the lining material 6 is hardened with an adhesive,
Since the lining material 6 itself constitutes a rigid pipe, the lining material 6 and the branch pipe 3 are not firmly bonded (however, the lining material 6 itself can sufficiently withstand external pressure, and the branch pipe 3
The lining material 6 is not crushed by the external water pressure of water entering from the outside.

Furthermore, it is inevitable that groundwater, rainwater, etc. that have entered between the branch pipe 3 and the lining material 6 will spread through the gap between the branch pipe 3 and the lining material 6, where the adhesion is weak. The water flows into the branch pipe 3 because the gap between the branch pipe 3 and the lining material 6 is blocked by the water stopper 16 at the branching point between the branch pipe 3 and the attached pipe 2, and the water flows into the branch pipe 3 and becomes sewage. It will not mix into the water and increase the volume of sewage unnecessarily. Furthermore, by forming protrusions or grooves on the outer surface of the soft tube 13 as described above, the water sealing agent 16 can penetrate into loose joints and cracked caps in the mounting pipe 2, and can be applied to these places. It can also significantly reduce water intrusion. Therefore, according to the present invention, only what was originally collected as sewage is sent to the treatment plant, and only the small amount of sewage that really needs to be treated needs to be treated at the treatment plant. The equipment will be small-scale and there will be an opportunity to reduce costs.

Means for Solving the Problem (Part 2) Next, the second invention of the present application is a method of lining the inner surface of the base pipe in a sewer pipe on the right side of a base pipe and a branch pipe branching from the middle of the base pipe, , flexible cylindrical woven or non-woven fabric 5
A reaction-curing adhesive is applied to the inner surface of the lining material, which is made by forming a flexible airtight layer made of rubber or synthetic resin on the outer surface of a fibrous reinforcement such as ' I silo and apply the adhesive to the fiber L? di
The inner and outer surfaces of the inner and outer surfaces are turned inside out under high fluid pressure on the outside of the base pipe, and the lining material is inserted into the base pipe. A semi-rigid tube with many small holes is inserted from the end, and its tip reaches the branching part of the base tube and the branch tube, and a soft tube is inserted in parallel with the semi-rigid tube using fluid pressure. The inner and outer surfaces are turned inside out and inserted so that the turned-over part reaches the branch part, and then the adhesive is cured while maintaining the fluid pressure in the lining material, while the water stopper is delivered from the semi-rigid tube. The water stopper is injected into the space between the inside-out part of the soft tube at the branch part and the outer surface of the lining material, and a portion of the water stopper is injected through the small hole of the semi-rigid tube. Leak between the branch pipe and the soft tube,
The method is characterized in that the inside of the soft tube is pressurized, then the soft tube is turned over and removed from the inside of the branch pipe, and then the lining material of the branch part is perforated.

In the present invention, the water stop agent 16 in the first invention
The 3R hard tube 12 is also distributed to the branch pipe, and a large number of small holes 17 are formed in the 3R hard tube 12. FIG. 3 shows a semi-rigid tube 12 used in the present invention, which has a large number of small holes 1 on its outer periphery.
7 is drilled.

The small holes 17 are large enough to allow the water sealing agent 16 to leak to the outside, and are suitably serrated with a diameter of approximately 1 mm.

Then, in the same manner as described in the first invention, the lining material 6 is inserted into the branch pipe 3 while being turned over by fluid pressure, and the semi-rigid tube 12 is inserted into the attachment pipe 2 from its open end. In parallel with the semi-rigid tube 12, the soft tube 13 is turned over by fluid pressure for 11 hours.

Then apply the water stopper 16 through the semi-hard 71 tube 12) 1
When the water stop agent 11 reaches 11, it fills the space between the inside out part 15 of the soft τ1 tube 13 at the branch part and the outer surface of the lining material 6, and a part of it leaks out from the small hole 17. , are also distributed along the attachment tube 2 and between the attachment tube 2 and the soft tube 13. In this state, when the fluid pressure inside the soft tube 13 is increased, the water stop agent 16 in the branch part is pressurized and enters between the branch pipe 3 near the branch part and the lining material 6, and the attached pipe 2 The water sealing agent 1G distributed between the pipe 2 and the soft tube 13 spreads to the inner surface of the pipe 2 and penetrates into the loosened joints and cracks in the fitting pipe 2.

In the present invention, as described in the first invention, spiral protrusions or grooves are formed on the outer surface of the soft tube 13 after it is turned over, so that the stopper leaking from the small hole 17 can be prevented. It is preferable that the liquid medication 16 be distributed over the entire inner surface of the attachment tube 2.

Next, in the same way as in the first invention, the whistle agent impregnated into the fiber 75 reinforcing body 7 of the lining shell 6 is hardened, the soft tube 13 is removed from the attachment pipe 2, and a hole is drilled into the lining shell 6 at the rear branching portion.

Effect (Part 2) In the present invention, as in the first invention, the space between the inside-out portion 15 of the soft tube 13 and the outer surface of the lining material 6 at the branching part between the attachment pipe 2 and the branch pipe 3. 1F water agent 16 is sealed between the branch pipe 3 around the branch and the lining material 6 because the water agent 16 is sealed in the tube and the inside of the soft tube 13 is pressurized to apply pressure to the water agent 16. The water sealing agent 1 spreads and infiltrates between the loose parts and cracks of the joint near the branching part, and leaks from the small hole 17 of the semi-rigid tube 12.
6 spreads between the attachment tube 2 and the soft tube 13, and enters between loosened joints and cracks in the attachment tube 2.

In this state, when the adhesive of the lining material 6 is cured and the fluid pressure within the lining material 6 is subsequently lowered, water that has entered through the joints and cracks of the branch pipe 3 reaches the vicinity of the branch, and the water stop agent 16 Upon contact with the water, the water stopper 16 reacts with the water and hardens, forming an insoluble hydrogel having rubber-like elasticity. The gel body blocks water and prevents the water from further spreading and reaching the branch, and in the present invention, the water stopper 16 also prevents intrusion into the joints and cracks of the mounting pipe 2. Therefore, the water flowing in from here immediately comes into contact with the water stop agent 16, and the water stop agent 16 hardens, effectively preventing the infiltration of external groundwater and the like.

Therefore, at the branching point between the branch pipe 3 and the attachment pipe 2, the branch pipe 3
and the lining material 6 are completely sealed,
Water that has flowed between the branch pipe 3 and the lining material 6 does not mix into the waste water through the through holes in the lining material 6 of the branch, and the mounting pipe 2 is sealed with the water stopper 16, making it easy to install. Water will not enter from the joints of pipe 2, etc.

Effects of the Invention (Part 2) Therefore, according to the present invention, as in the case of the first invention, there is little water intrusion from loosening or cracks in the joints of the branch pipe 3, and the lining material 6 is not exposed to the outside. It has the effect that it will not be crushed by the pressure of the water, and the mounting pipe 2
This also has the effect of effectively preventing water from entering through loose or cracked joints.

Means for Solving and Overcoming Problems (Part 3) The third invention of the present application provides a method for lining the inner surfaces of the base pipe and the branch pipe described in +ii'i in a sewer pipe having a base pipe and a branch pipe branching from the middle of the base pipe. This method involves reaction hardening on the inner surface of a branch pipe lining material, which is made by forming a flexible airtight layer made of rubber or synthetic resin on the outer surface of a flexible cylindrical woven fabric or non-woven fabric made of N-based reinforcing material. A molding adhesive is applied to impregnate the fibrous reinforcement, and the branch pipe lining is turned over inside and out under a fluid pressure higher than the water pressure outside the branch pipe, and the open end of the branch pipe is The branch pipe lining material is inserted through the base pipe, and the reversed part thereof is protruded into the base pipe at the branch part, the adhesive is hardened, and then a core cutter is inserted into the base pipe, and the branch pipe lining material is protruded into the base pipe. Then, a flexible cylindrical woven or nonwoven fabric is cut.
! [A reaction-curing adhesive is applied to the inner surface of the base tube lining material, which is formed by forming a flexible airtight layer made of rubber or synthetic resin on the outer surface of the reinforcing body, and the blue tinting agent is impregnated into the fibrous reinforcing body. and inserting the base pipe lining material into the base pipe while turning the inner and outer surfaces inside out with a fluid pressure higher than the water pressure outside the mu1 pipe,
On the other hand, a semi-rigid tube is inserted into the branch pipe from its open end so that its tip reaches the branching point between the base pipe and the branch pipe, and a soft tube is inserted in parallel with the semi-rigid tube using fluid pressure. The inner and outer surfaces are turned inside out, and the turned-over part reaches the branch part. Then, while maintaining the fluid pressure in the base tube lining material and curing the adhesive, water is cut off from the semi-rigid tube. The agent is injected into the space between the inside out part of the soft tube at the branch part and the outer surface of the base tube lining material, the inside of the soft tube is pressurized, and then the soft tube is turned over and the thick tube is injected from inside the branch tube. The special feature is to remove the pipe, pierce it, and perforate the lining material of the gutter pipe at the branching part.

The present invention is a method for lining the branch pipe 3 of a sewer pipe and also lining the attachment pipe 2.

In the present invention, first, the mounting pipe 2 is lined with a lining fence. Reference numeral 18 denotes a branch pipe lining material, which has the same structure as the base pipe lining material 6 of the branch pipe 3. Rubber or A flexible airtight layer 8 made of synthetic resin is formed,
A reaction-curing adhesive is applied to the inner surface of the adhesive.
The reinforcing body 7 is impregnated with it.

One end of the branch pipe lining material 18 is annularly fixed to the opening of the pressure vessel 19, and fluid pressure is applied to the rear part of the annular fixing part. Then, while turning over the branch pipe lining material 18 so that the inside becomes the outside at the turned-back part 20 formed there, the turned-over part 20 is introduced from the sewage basin 1 into the attachment pipe 2 and proceeds along the attachment pipe 2. Then, as shown in FIG. 4, the everted part 20 is made to protrude into the branch pipe 3 from the branch part. The fluid pressure for turning over the branch pipe lining material 18 needs to be higher than the water pressure of the water outside the attachment pipe 2, and that pressure was previously applied to the lining material 6 of the branch pipe 3 in the first invention. It can be calculated according to the method described above as the method for applying pressure to turn over.

Next, while maintaining the fluid pressure inside the branch pipe lining material 18, the fluid pressure inside the branch pipe lining material 18 is maintained.
The adhesive impregnated into the fibrous reinforcement 7 is cured.

Next, as shown in FIG. 4, the boring machine 21 is installed inside the manhole 4, and the rod 2 of the boring machine 21 is
At the tip of 2, there is a core cutter 2 driven by a motor 23.
Install 4. Then, while rotating the core cutter 24, the boring machine 21 inserts it into the branch pipe 3 and pushes it forward.
The core cutter 24 cuts the branch pipe lining material 18 protruding into the branch pipe 3. Further, at the open end of the attachment pipe 2, that is, the opening to the sewage basin 1, the branch pipe lining material 18 is cut and the end of the branch pipe lining material 18 is sealed by appropriate means. Note that the core cutter 24 is moved inside the branch pipe 3.
In addition to the method of pushing the branch pipe 3 using the boring machine 21 as described above, the branch pipe 3 may be pulled by a wire or the like from the opposite direction.

Subsequently, the inner surface of the branch pipe 3 is lined with the base pipe lining material 6 in exactly the same manner as in the first invention, and the liquid medicine 16 is press-fitted into the branch part.

Effect (Part 3) In the present invention, the branch pipe lining material 18 is inserted into the attachment pipe 2 while being turned over, and the adhesive is cured, so that the branch pipe lining material 18 is attached to the inner surface of the attachment pipe 2 through the adhesive. While being bonded, the adhesive enters into loose or cracked parts of the joint to prevent groundwater or rainwater from entering from outside the attachment pipe 2. However, as in the case of the relationship between the branch pipe 3 and the lining material 6 in the first invention, it is necessary to completely and firmly bond the attachment pipe 2 and the branch pipe lining material 18 together. 9, it is completely possible to completely prevent water from entering through loose parts or cracks. Even so, is it necessary to attach the branch pipe lining material 18 to the inside of the mounting pipe 2? After solidifying with the first agent, the rigid pipes are fitted together, and the branch pipe inner liner 18 is crushed by the external water pressure of the water that has entered the attachment pipe 2, so it will not bend. branch?1
Since the QIS 20 of the lining material 18 is also impregnated with adhesive ~1 and hardened rigidly, it can be easily and neatly cut into 11 pieces by the core cutter 24.

Next, insert the base pipe lining material 6 into the branch pipe 3 while turning it over, and insert the semi-rigid tube 12 and the soft tube 13 into the branch pipe lining material 18 lined in the first pipe 2. When the water sealing agent 16 is injected into the branch at step 12 and the inside of the soft tube 13 is pressurized, the water stop agent 16 spreads along between the branch pipe 3 and the base pipe lining material 6, and connects to the attachment pipe 2 and the branch. It also enters between the pipe lining material 18 and is press-fitted along the locations where the fitting between the attachment pipe 2 and the branch pipe lining material 18 is insufficient.

Therefore, water that has entered through loose parts of the joints of the intake pipe 2 and the branch pipe 3, or damaged parts such as cracks, will not enter between the attachment pipe 2 and the branch pipe lining material 18, and between the branch pipe 3 and the 111 pipe lining material. 6, but when it reaches the branch, it comes into contact with the water stop agent 16, and the water stop agent 16 hardens to form a hydrogel, preventing further water from entering. to prevent

Effects of the Invention (Part 3) Therefore, according to the present invention, the attachment pipe 2 can be lined without digging out the branch part with the branch pipe 3, and the branch pipe lining material 18 can be The end on the side can also be cut by the core cutter 24 and processed appropriately.

In addition, since the lining materials 18 and 6 are turned over and inserted into the attachment pipe 2 and the branch pipe 3 using a fluid pressure higher than the water pressure outside of the attachment pipe 2 and the branch pipe 3, the joints of the attachment pipe 2 and the branch pipe 3 become loose. Even in pipes where water is flowing in from cracks or cracks, the lining material 18,
6 can be reversed. In addition, since the adhesive is cured while maintaining the fluid pressure, the adhesive is pushed into the loose or cracked joints of the attachment pipe 2 and branch pipe 3, filling those gaps and greatly reducing water intrusion. be able to.

In addition, in the sewer pipe lined according to the present invention, J3 has the following characteristics:
The lining material 18.6 has its fibrous reinforcement 7 hardened with adhesive, and since the lining material 18.6 itself constitutes a rigid tube, it is easy to install it. 22 or firmly bonded to the branch pipe 3, the branch pipe lining material 18 and! ; The inner body of the 4-pipe lining material 6 can sufficiently withstand external pressure, and will not be crushed by the external water pressure of water entering from the 4-pipe 2 and branch pipes 3.

Furthermore, groundwater, rainwater, etc. that have entered between the attachment pipe 2 or branch pipe 3 and the lining material 18.6 will inevitably spread through the gaps in the parts where the adhesive strength is weak; The gap between the pipe 3 and the attached pipe 2 is 16 tons of water stop agent.
"Since this water is shut off, this water will not flow into the branch pipe 3 and mix with the wastewater, increasing the amount of wastewater. Therefore, only what was originally collected as wastewater will be sent to the treatment plant, and the At the treatment plant, only the small amount of sewage that really needs to be treated needs to be treated, so the equipment required for sewage treatment can be small-scale, and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a central vertical cross-sectional view of a sewer pipe, showing the implementation status of the present invention. Fig. 2 is a partially cutaway perspective view of the lining material used in the present invention. Fig. 3 is a perspective view of a semi-rigid tube used in the second invention of the present application. Figure 4 is a central vertical cross-sectional view of the sewer pipe, not showing the state in which the branch pipe is lined, in the third invention of the present application.
The figure is a central vertical sectional view showing the sewer pipe system that this fl Komyo is intended to install. 2... Branch pipe (installation pipe) 3... Base pipe (branch pipe) 6... Lining material 7...
・m Fibrous reinforcement body 8... Airtight W4 12...
... Semi-rigid tube 13 ... Soft tube 15 ... Inverted part 16 ... Water stop agent 17 ... Small hole 18 ...・Branch pipe lining material 20...Inverted part 24...
Koakakku 4 servings 1.1. Puff i ゛・′.゛・rh'l. Stone 1 Go; ξ Figure 3

Claims (1)

[Scope of Claims] 1. A method of lining the inner surface of a base pipe (3) in a sewer pipe having a base pipe (3) and a branch pipe (2) branching from the middle of the base pipe (3), comprising: Lining material (made by forming a flexible airtight layer (8) made of rubber or synthetic resin on the outer surface of a flexible cylindrical fibrous reinforcement (7) such as woven or nonwoven fabric)
A reaction curing adhesive is applied to the inner surface of the fibrous reinforcing body (7), and the lining material (7) is impregnated with the adhesive.
6) is inserted into the base pipe (3) while turning the inner and outer surfaces inside out under a fluid pressure higher than the external water pressure of the base pipe (3), while the semi-rigid tube is inserted into the branch pipe (2) from its open end. (1
2) and connect its tip to the base tube (3) and branch tube (2).
) and insert the soft tube (13) parallel to the semi-rigid tube (12) with its inner and outer surfaces turned over using fluid pressure to reach the turned-over portion (15) to the fork portion. tightening and then curing the adhesive while maintaining fluid pressure within the lining (6);
The water stop agent (16) is applied from the semi-rigid tube (12) to the inside-out part (15) of the soft tube (13) at the branch part.
) and the outer surface of the lining material (6), pressurizes the inside of the soft tube (13), and then turns the soft tube (13) upside down and removes it from the inside of the branch pipe (2). , followed by perforating the lining material (6) of the branch part. Method 2 for lining a sewer pipe having a branch part. The water stop agent (16) is an organic isocyanate polyether diol prepolymer. or a hydrophilic polyurethane resin stock solution consisting of an organic isocyanate polyether triol prepolymer and toluene diisocyanate. A sewerage system having a branch section according to claim 1, wherein the soft tube (13) has a spiral protrusion or groove formed on a surface corresponding to the outer periphery after being turned over. Pipe lining method 4 A method of lining the inner surface of the base pipe (3) in a sewer pipe having a base pipe (3) and a branch pipe (2) branching from the middle of the base pipe (3), which Lining material (made by forming a flexible airtight layer (8) made of rubber or synthetic resin on the outer surface of a cylindrical fibrous reinforcement (7) such as woven or nonwoven fabric)
A reaction curing adhesive is applied to the inner surface of the lining material (6) to impregnate the fibrous reinforcement (7) with the adhesive.
6) into the base pipe (3) while turning the inner and outer surfaces inside out under a fluid pressure higher than the external water pressure of the base pipe (3), while a large number of small holes are inserted from the open end of the branch pipe (2). (17) is inserted into the semi-rigid tube (12), and its tip is brought to the bifurcation between the base tube (3) and the branch tube (2), and parallel to the semi-rigid tube (12). Then, insert the soft tube (13) while turning the inner and outer surfaces inside out using fluid pressure to bring the turned-up part (15) to the branch part, and then insert the soft tube (13) while maintaining the fluid pressure inside the lining material (6). While curing the adhesive, the semi-rigid tube (12)
A water stop agent (16) is fed into the inside out part (1) of the soft tube (13) at the branch part.
5) and the outer surface of the lining material (6), and at the same time, a part of the water stopper agent (16) is injected into the space between the outer surface of the semi-rigid tube (12) and the branch pipe (2). ) and the soft tube (13), and the soft tube (13)
), then the soft tube (13) is turned over and removed from the branch pipe (2), and then the lining material (6) of the branch part is perforated. Method 5 for lining a sewer pipe having a water stopper (16) is a hydrophilic polyurethane resin stock solution consisting of an organic isocyanate polyether diol prepolymer or an organic isocyanate polyether triol prepolymer and toluene diisocyanate. A method 6 for lining a sewer pipe having a branch part according to claim 4, characterized in that the method includes a base pipe (3) and a branch pipe (2) branching from the middle of the base pipe (3). A method of lining the inner surfaces of the base pipe (3) and branch pipe (2) in a sewer pipe, the outer surface of a flexible cylindrical fibrous reinforcement (7) such as woven or non-woven fabric being lined with rubber or synthetic resin. Applying a reaction curing adhesive to the inner surface of the branch pipe lining material (18) forming a flexible airtight layer (8) made of the above, and impregnating the fibrous reinforcement (7) with the adhesive; The branch pipe lining material (18) is attached to the branch pipe (2).
) is inserted through the open end of the branch pipe (2) while turning over the inner and outer surfaces with a fluid pressure higher than the external water pressure of the pipe, and the turned part (20) is made to protrude into the base pipe (3) at the branch part. , the adhesive is cured, and then the base tube (3
) and insert the core cutter (24) into the base tube (3).
Cut the branch pipe lining material (18) that protrudes inward, and then
On the inner surface of the base tube lining material (6), which is formed by forming a flexible airtight layer (8) made of rubber or synthetic resin on the outer surface of a flexible cylindrical fibrous reinforcement (7) such as woven or nonwoven fabric, A reaction-curing adhesive is applied to impregnate the fibrous reinforcement (7), and the base pipe lining material (6) is internally coated with a fluid pressure higher than the water pressure outside the base pipe (3). The semi-rigid tube (12) is inserted into the base tube (3) with its outer surface turned over, while the semi-rigid tube (12) is inserted from its open end into the branch tube (2) and its tip is connected to the base tube (3) and the branch tube. At the same time, the soft tube (13) is inserted in parallel with the semi-rigid tube (12) while turning the inside and outside surfaces inside out using fluid pressure, and the turned-over part (15) is inserted into the branch part (2). Then, while maintaining the fluid pressure in the base pipe lining material (6) and curing the adhesive, the water sealing agent (16) is applied from the semi-rigid tube (12) to the soft material at the branch part. The inside of the soft tube (13) is pressurized by injecting it into the space between the inside out part (15) of the tube (13) and the outer surface of the base tube lining material (6), and then the inside of the soft tube (13) is injected.
Turn it over and remove it from the branch pipe (2), then
Method 7 for lining a sewer pipe having a branch part, characterized by perforating the base pipe lining material (6) of the branch part. The water stop agent (16) is an organic isocyanate polyether diol prepolymer or an organic isocyanate. A method for lining a sewer pipe having a branched portion according to claim 5, characterized in that it is a hydrophilic polyurethane resin stock solution consisting of a polyether triol prepolymer and toluene diisocyanate.