JP2008230058A - Existing pipe repair technique - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an existing pipe repair technique which can facilitate the conveyance and introduction of a tubular lining material into an existing pipe, ensure the durability of a regenerated pipe at the time of its completion, with a cost reduction, and secure the deaeration properties and surface smoothness and the best-suited repair of a damaged spot of an existing pipe surface. <P>SOLUTION: In introducing the tubular lining material 12 obtained by impregnating a tubular lining core with an uncured resin, into the existing pipe (10) intended for repairing, the lining core is impregnated with a specified amount of an uncured resin, then is inserted reversely into the existing pipe (10). Further, during this reverse insertion, the uncured resin is made to find its way, for packing, into the gap between the reversed tubular lining material 12 and the inner wall of the existing pipe (10). Thus, the uncured resin feed process to feed the uncured resin from the forward position of the reverse insertion direction, is performed. Consequently, the mill-manufactured tubular lining material 12 can be made lightweight and the conveyance of the lining material 12 be facilitated. Besides, the appropriate thickness, strength, durability, deaeration properties, etc. of the completed regenerated pipe, can be guaranteed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an existing pipe repair method, in particular, an existing pipe repair in which an uncured tubular lining material is introduced into an existing pipe buried in the ground such as a sewer, and the existing pipe is cured after being introduced. It relates to the construction method.

  The sewerage penetration rate in Japan is 69% on average, and in urban areas, it is close to 100%. Under such circumstances, the construction of new sewerage pipes has almost disappeared except in some regions, and the maintenance of old pipes has become important. The total length of sewage pipes is approximately 360,000 km, of which pipes that have exceeded the service life of 50 years are over 7000 km. In the future, it is expected to increase by several thousand kilometers per year.

  In general, for pipes buried in the ground such as sewer pipes, it is inevitable that various deformations will occur over the years since installation, such as cracks, steps due to misalignment, diameter changes, etc. For this reason, there are problems that the flow force of the sewage pipe decreases and the amount of treated sewage increases due to the ingress of groundwater into the pipe. In addition, even if no deformation occurs, existing pipes need to be repaired at certain times due to the need to replace accidents to prevent accidents. .

  Currently, the sewage pipe regeneration repair technique is to excavate the ground by work from the ground, excavate the old pipe from the ground and insert a new pipe, repair the inner surface of the pipe from inside the pipe without digging The work method and the method of putting a new pipe in non-open cut are adopted. As a repair method that inserts a new pipe by this non-cutting method, a repair technique called the pipe rehabilitation method has been adopted, and this technique impregnates an existing pipe with an uncured resin in a sleeve made of glass fiber or the like. Introducing the factory-produced tubular lining material into the existing sewer pipe, expanding the diameter using pressurized air, etc., and curing it in close contact with the existing pipe to form a new FRP pipe in the existing pipe To do.

  For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 6-246830) and Patent Document 2 (Japanese Patent Application Laid-Open No. 2004-188818), such an uncured lining pipe is inverted and advanced by pressurized air or warm water. A lining method for repairing a pipe after being introduced into an existing pipe and then cured by heat or light is disclosed.

JP-A-6-246830 JP 2004-188818 A

  The technology for repairing an existing pipe by reversing and introducing the lining core material impregnated with the uncured resin as described above into the existing pipe has the following problems.

  (I) The above-described tubular lining material is uncured but is in a molded state, and when the tubular lining material is introduced into the existing pipe, the tubular lining material contacts the inner wall surface of the existing pipe. However, it cannot be expected that the resin penetrates into the damaged part (crack) of the existing pipe. Therefore, the existing tubular lining material cannot be expected to repair the existing pipe itself. Further, since the tubular lining material contracts during the curing process, there is a possibility that a gap is formed between the cured tubular lining material and the existing pipe inner wall surface. The generation of such a gap causes a groundwater infiltration path, and also hinders the integration of the tubular lining material and the existing pipe.

  (Ii) In order to be able to withstand, for a long period of time, earth pressure, water pressure, loads caused by vehicles on the road surface, etc., when buried in the ground, the tubular lining material is often thick. . Therefore, the production cost and the transportation cost from the factory to the site tend to be high, and there is a disadvantage that the difficulty of inserting the lining material into the existing pipe increases in the construction.

  (Iii) In addition, in the case of a conventional tubular lining material that has been impregnated with a thermosetting resin at the factory, there is also a problem that the shelf life is poor. That is, when a thermosetting lining material is used, curing by a rapid reaction occurs at a set curing temperature or higher, for example, about 60 ° C. to 70 ° C. or higher, but curing gradually proceeds even at atmospheric temperature. Therefore, after manufacturing in a factory, it could not be left unused for a long time, and management was difficult.

  The present invention has been made in view of the drawbacks of existing pipe repair using the above-described conventional tubular lining material, and its purpose is to facilitate the transportation and introduction of the tubular lining material into the existing pipe. An object of the present invention is to provide an existing pipe repair method capable of ensuring durability and appropriately repairing a damaged portion of an existing pipe surface.

In order to solve the above problem, the existing pipe repair method according to claim 1 is:
An existing pipe repair in which a tubular lining core material and a tubular lining material formed by impregnating this with an uncured resin are cured in a state where they are introduced into an existing pipe to be repaired, and the existing pipe is repaired. In the construction method, the tubular lining material is introduced by impregnating the lining core material with a predetermined amount of uncured resin, and then inserting the lining material into the existing pipe while being expanded to the inner wall surface side of the existing pipe by a reversing operation. During the reverse insertion operation, the uncured resin is supplied from the front in the reverse insertion direction so as to perform the filling and filling of the uncured resin between the inverted tubular lining material and the existing pipe inner wall. A cured resin supply step is performed.

  According to this configuration, since the uncured resin is filled between the inverted tubular lining material and the existing pipe inner wall, one line as a whole is formed when the tubular lining material and the uncured resin layer outside thereof are cured. A ning tube, ie one rehabilitation tube, is completed. Thereby, the rehabilitation pipe | tube with sufficient intensity | strength with sufficient thickness will be installed in the existing pipe | tube in the field.

  Therefore, first, the tubular lining material manufactured in advance in the factory can be thinner than the conventional one. Furthermore, the tubular lining material does not need to be impregnated with 100% resin during production. That is, since it is inverted and inserted into the existing pipe and then the outside is filled with the uncured resin, the impregnation with the completely uncured resin is performed at that stage. Therefore, the manufacturing of the tubular lining material in the factory is reduced in thickness, and further, the amount of impregnation of the uncured resin is reduced, and the weight is reduced. Therefore, shortening of manufacturing time and ease of transportation are achieved.

  Further, the uncured resin that fills the outside of the tubular lining material after the reverse insertion forms a resin layer on the outer periphery of the reverse tubular lining material and at the same time penetrates into the damaged portion of the existing pipe. Therefore, repairs such as cracks occurring on the inner wall surface of the existing pipe can be achieved at the same time. Furthermore, the penetration of the resin into the existing pipe inner wall surface can effectively suppress the generation of a gap between the resin and the existing pipe inner wall surface due to the shrinkage when the resin is cured.

  Further, since the tubular lining material located inside after the inversion is impregnated with a predetermined amount of uncured resin, the resin is removed by means of removing bubbles in the process of impregnating the uncured resin at a factory, for example. It is possible to reduce the bubble content to a predetermined content or less. When impregnating uncured resin with existing pipes at the construction site, accurate defoaming is difficult, and when the whole is composed of an unimpregnated core material, the thickness is very thin (about 3 mm to 5 mm). Since it must be a core material, the introduction of a tubular lining material impregnated with a predetermined amount of resin ensures the layer of the rehabilitated tube from which at least air bubbles have been removed.

  In addition, the inner surface of the rehabilitation pipe completed in the existing pipe will be composed of a tubular lining material manufactured by the factory, but this tubular lining material manufactured by the factory is in comparison with the impregnation of uncured resin in the field, It can be stabilized while maintaining the smoothness of the surface. Therefore, the state of the inner surface in the state where the rehabilitation pipe is completed as a whole can be made a good smooth surface.

The existing pipe repair method according to claim 2 is:
Before the tubular lining material is inverted and inserted into the existing pipe, a tubular impermeable film having flexibility, stretchability and adhesion after curing to the uncured resin is introduced into the existing pipe, and the tubular lining is introduced. The reversal insertion operation performed while expanding the material to the existing tube inner wall surface side is performed from the inside of the tubular impermeable film, and in the uncured resin supply step, the reversed tubular lining material outer surface, the existing tube inner wall surface, It is characterized in that the uncured resin enters and fills between the inverted tubular lining material outer surface and the tubular water-impermeable film, not between the two.

  According to this configuration, an impermeable film having flexibility, stretchability, and adhesion after curing to an uncured resin already exists on the outside of the tubular lining material to be inverted and inserted. That is, the impermeable film is kept in a state where it is properly attached to the uncured resin that has been intruded and filled after it has undergone a curing process. The tubular water-impermeable membrane is preferably formed of a material such as polyester, and further preferably reinforced by adding a jacket (outer skin layer) woven from nylon fiber, vinylon fiber, cotton or the like.

  Due to the presence of the tubular impermeable membrane having the above properties, for example, ground deformation may occur due to an earthquake, etc., and the joint position and middle position of the existing existing pipe, and the inner tubular lining material may have gaps and deformation due to cracks, etc. In such a case, the tubular impermeable membrane can cover this gap and the like by its flexibility and stretchability. Therefore, the watertightness at that portion can be maintained, and secondary disasters can be prevented. In addition, in the case where groundwater leaks into the existing pipe due to cracks, etc. in the existing pipe, and the effect of this impedes the hardening of the resin of the tubular lining material, this tubular defect is not possible. Due to the presence of the permeable membrane, invasion of groundwater is suppressed, and direct contact of groundwater with the tubular lining material before curing can be reliably prevented. In addition, actions, such as weight reduction of the tubular lining material manufactured in a factory, can be obtained similarly to the first aspect.

The existing pipe repair method according to claim 3 is:
In the tubular lining material before the reverse insertion, a tubular water-impermeable film having flexibility, stretchability and adhesion to the uncured resin after curing is brought into close contact with the inner surface of the tubular lining material. In this state, the reversal insertion operation into the existing pipe and the uncured resin supply step are performed, and in the uncured resin supply step, the reversed tubular lining material outer surface and the existing tube inner wall surface Intrusion filling of uncured resin is performed between the tubular impervious membrane that has been reversed and moved to the outer surface side of the tubular lining material and the inner wall surface of the existing tube, instead of between.

  According to this configuration, the tubular water-impermeable film exists on the outer surface of the inverted tubular lining material, and the outer side is filled with uncured resin. Therefore, when these are hardened, an integrated rehabilitation pipe having a tubular impermeable membrane as an intermediate layer is completed in the existing pipe. Therefore, in addition to the various effects of uncured resin entering and filling the outermost layer described in claim 1 above, the function of the tubular impermeable membrane having flexibility and stretchability described in claim 2 is provided. A rehabilitation pipe can be obtained. For example, the tubular impermeable membrane can exert a water-stopping function even when the shape of the existing pipe is changed and the outermost rehabilitation pipe portion and further the inner rehabilitation pipe portion are damaged. In addition, actions, such as weight reduction of the tubular lining material manufactured in a factory, can be obtained similarly to the first aspect.

The existing pipe repair method according to claim 4 is:
Before introducing the tubular lining material into the existing pipe, an unimpregnated lining core material introducing step of introducing a lining core material not impregnated with uncured resin is performed, and then the tubular lining into the lining core material A reverse insertion operation of the material and the uncured resin supply step are performed, and in the uncured resin supply step, the unimpregnated lining core material is also impregnated with the uncured resin.

  According to this configuration, a high-strength rehabilitation pipe having a sufficient thickness in which the core material exists as a whole after curing can be completed in the existing pipe at the site. Further, the intrusion filling of the uncured resin is performed between the outer unimpregnated lining core material which is not filled with the resin at all and the tubular lining material which is impregnated with the predetermined resin inside. Therefore, the uncured resin is impregnated into the unimpregnated lining core material, and further reaches the inner wall of the existing pipe outside, and if there are recesses or cracks in the existing pipe, it enters there, and those described above Demonstrate the effect of repairing.

  At the same time, the inner tubular lining material is also impregnated, and the rehabilitating tube containing the core material can be installed on the entire body fully impregnated with the resin.

The existing pipe repair method according to claim 5 is:
Reversal insertion of the tubular lining material into the unimpregnated lining core material after the introduction of the unimpregnated lining core material is a tubular non-removable material having flexibility, stretchability and adhesion to the uncured resin after curing. The water permeable membrane is performed by reversing insertion of the tubular lining material attached in a state where the outer side surface is in close contact with the inner side surface, and in the uncured resin supply step, the reversal film is moved to the outer side surface of the tubular lining material It is carried out as impregnating filling of uncured resin into the unimpregnated lining core located outside the tubular impermeable membrane.

  According to this configuration, an integrated rehabilitation pipe in which the tubular impermeable membrane is present as an intermediate layer is completed in the same manner as the rehabilitation pipe obtained according to claim 3 described above. And the point different from claim 3 is that the lining pipe in which the core material exists also in the outermost layer part that contacts the existing pipe can be formed, and the rehabilitation pipe that is integrally completed has higher reliability. be able to. Further, it is the action obtained by the structure of claim 3 described above, and the various actions of filling the uncured resin into the outermost layer described in claim 1, and the flexibility and stretchability described in claim 2. A flexible water-stopping action and the like due to the presence of the tubular impermeable membrane having the same can also be achieved. In addition, actions, such as weight reduction of the tubular lining material manufactured in a factory, can be obtained similarly to the first aspect.

The existing pipe repair method according to claim 6 is:
The uncured resin previously impregnated in the lining core material and the uncured resin supplied in the uncured resin supply step are different in that they have different curability. According to this configuration, in order to obtain a more accurate curing action of the rehabilitation tube, for example, a resin having a different curing temperature in a thermosetting resin can be simply applied to the inner layer and the outer layer. Is possible. That is, since the inner tubular lining material and the outer filling resin layer are formed separately, the above-described different curability can be obtained by adopting a usage mode in which the outer layer is cured at a lower temperature than the inner layer. The lining layer can be easily configured.

The existing pipe repair method according to claim 7 is:
A photo-curing uncured resin is used as the uncured resin that is pre-impregnated into the lining core material, and a thermosetting uncured resin is used as the uncured resin supplied in the uncured resin supply step. It is characterized by that. According to this configuration, not only the above-described accurate repair of the inner wall surface of the existing pipe and the facilitation of the manufacture of the tubular lining material in the factory, but also the accurate hardening operation of the lining pipe having a sufficient thickness can be achieved at the same time. That is, the inner tubular lining material is photo-curing, and the resin layer that is filled and formed later is thermo-curing, so that the heat generated during photo-curing of the inner layer is utilized to cure the outer layer. Can promote and assist. That is, the lining pipe | tube which combines the advantage of photocuring and thermosetting can be easily comprised by the characteristic of the unification | combination of the factory manufacturing part of this invention, and the existing pipe formation part.

The existing pipe repair method according to claim 8 is:
The supply of uncured resin from the front in the reverse insertion direction during the reverse insertion operation forms a closed space in the existing pipe in front of the tubular lining material that has been reverse inserted, and the uncured resin is formed in the closed space. The resin is filled to form an uncured resin filled region, and the reverse insertion operation of the tubular lining material into the existing pipe is performed while the leading portion enters the uncured resin filled region ahead, and the uncured resin filled The region is formed so as to move sequentially in the insertion direction as the insertion operation of the tubular lining material proceeds.

  According to this configuration, it is possible to always and accurately achieve the ingress filling of the uncured resin to the outside of the tubular lining material to be inverted and inserted, with a simple configuration.

The existing pipe repair method according to claim 9 is:
Formation of the uncured resin filling region is movably installed in the existing pipe, and a closing means for forming the closed space, and uncured resin injection for injecting the uncured resin into the closed space at a predetermined pressure It is performed by an uncured resin supply device having a mechanism and a brake means provided in front of the closing means in the front reverse insertion direction and pressed against an existing inner wall surface of the pipe to perform a braking function.
According to this configuration, a partition can be formed in the existing pipe by the closing means, and a space for storing the uncured resin can be secured by using the partition as a boundary, and the uncured resin injection mechanism can store the uncured resin in the space. By forming the full area, it is possible to easily form the uncured resin full area. Therefore, accurate entry and filling of the uncured resin to the outside of the tubular lining material to be inverted can be achieved with a simple configuration. In addition, it becomes possible to accurately hold and adjust the pressure state of the resin in the uncured resin filling region by braking by the brake means.

The existing pipe repair method according to claim 10 is:
The brake means of the uncured resin supply device restrains the uncured resin supply device against the internal pressure of the uncured resin filling region caused by the injection of the uncured resin and can be moved by a pulling operation from the front side. It has a brush-like outer surface that generates a braking force as follows. As described above, the brake means having a brush-like outer surface facilitates ensuring the contradictory effects of supplying the restraining force and allowing the moving operation. That is, fine adjustment of the braking force can be performed relatively easily by adjusting the hardness and amount of the portion that contacts the bristles of the brush.

  According to the existing pipe repairing method according to the present invention, it is possible to reduce the thickness of the tubular lining material manufactured at the factory and to reduce the filling operation of the uncured resin, and to suppress the cost and transport the tubular lining material to the construction site. The introduction to existing pipes can be facilitated. In addition, the formation of multiple layers of rehabilitation pipes allows for variations in properties for each layer. In addition, when completed in existing pipes, the removability of air bubbles in the rehabilitation pipes and smoothing of the inner surface are possible. High quality, excellent strength, and durability are ensured, and appropriate repairs to damaged parts of the inner wall surface of the existing pipe are simultaneously achieved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic explanatory view showing an embodiment of an existing pipe repair method according to the present invention, and shows an example applied to a sewer system having a general configuration. In the figure, the display of the thickness of various introduction members (such as a tubular lining material 12 described later) relative to the inner diameter and length of the sewer main pipe 10 is the actual size in order to facilitate understanding of the structure. It is shown in a state different from the ratio (the same applies to the following figures).

  As shown in the drawing, a sewer main 10 that is an existing pipe to be repaired is disposed between manholes 100 and 102 installed at a predetermined interval. This sewer main 10 is repaired using the method of the present invention, and various members and devices for implementing the existing pipe repair method according to the embodiment are installed in the sewer main 10.

  That is, the tubular lining material 12 is introduced from the manhole 100 through the space between the two rollers 400, and is sequentially fed from a feeding mechanism of the tubular lining material 12 (not shown) installed on the ground in the vicinity of the manhole 100. It is inserted into the sewer main 10 through. As shown in the drawing, from the entrance opening of the sewer main pipe 10 to the roller 400 and the feeding mechanism of the tubular lining material 12 (not shown) are hermetically covered by a cover pipe 500, and this cover pipe 500 The tubular lining material 12 is inserted by sending pressurized air (hot air or the like) in the inside.

  This insertion is so-called inversion insertion, and the tubular lining material 12 is inserted while being reversed. At that time, the above-described pressurized air is fed into the tubular lining material 12 as indicated by the arrow 200, and the reverse insertion proceeds by the pressure. The pressure of the pressurized air for reversal is, for example, about 0.03 to 0.07 MPa. For feeding this pressurized air, a supply pipe 14 is hermetically installed in the opening on the 100 side of the sewer main pipe 10, and the introduction of the tubular lining material 12 is performed through the supply pipe 14. .

  In addition, an uncured resin-filled region X exists in front of the distal end portion of the tubular lining material 12 to be inverted and inserted in the inverted insertion direction. That is, the inverted insertion of the tubular lining material 12 is performed by an operation of causing the leading portion to enter the uncured resin-filled region X.

  An uncured resin supply device 16 for forming the uncured resin full region X is installed in front of the uncured resin full region X. In the present embodiment, the uncured resin supply device 16 is, for example, It has an apparatus main body 16a formed in a substantially cylindrical shape, and a pump (not shown) for supplying an uncured resin under pressure is provided therein. For example, the uncured resin is supplied from an uncured resin storage tank (not shown) installed on the ground via the supply hose 22 from the manhole 102 side.

  In addition, the uncured resin supply device 16 is provided with a closing means for closing the sewer main 10. In the present embodiment, it is formed by three rows of packings 24 provided on the outer side of the apparatus main body 16a, and the sewer main pipe 10 is closed at this portion. As a result, a closed space is formed in the front region of the leading portion of the tubular lining material 12, and uncured resin is supplied to the closed space, so that an uncured resin filled region X is formed. The uncured resin is supplied by feeding the uncured resin sent through the supply hose 22 into the closed space from the injection port 17 provided in the apparatus main body 16a. In addition, the resin pressure of the uncured resin filling region X formed here is approximately the same as the pressure of the above-described pressurized air for reversal (for example, 0.03 to 0.07 MPa), and the resin pressure is obtained. The resin is supplied from the inlet as shown in FIG.

  Further, it is preferable to provide a brake means for braking the uncured resin supply device 16 in order to keep the resin pressure in the uncured resin filling region X at an appropriate value. In the present embodiment, the device main body 16a is provided. A brake device 20 is provided in front of the brake device 20 and has a brake portion 20a that can be extended outward. The brake portion 20a is pressed against the inner wall surface of the sewer main pipe 10 to exert a braking action. is there.

  Although not shown, when air is collected in the upper region of the uncured resin-filled region X during the reversal insertion operation of the tubular lining material 12, the air is vented to extract this outside the uncured resin-filled region X. It is also preferable to provide a passage in the upper part of the uncured resin supply device 16. For example, the apparatus main body part is provided with an air vent tube having openings at both ends so that one end side is located in the upper region of the uncured resin filling area X and the other end is located in front of the apparatus main body part 16a in the insertion progression direction (right side in the figure) It can comprise by attaching to 16a.

  Next, FIG. 2 is a partially enlarged explanatory view for explaining the characteristic part of the present invention in the embodiment, and shows the state of the leading portion of the tubular lining material 12 to be inverted and inserted as shown. ing. As described above, the inverted head portion of the tubular lining material 12 is in the uncured resin-filled region X, and fills the uncured resin-filled region X as the tubular lining material 12 progresses. The uncured resin enters and fills the outside of the tubular lining material 12, that is, the tube between the inner wall surface of the sewer main pipe 10 and the outside surface of the tubular lining material 12.

  Therefore, the thickness of the resin constituting the rehabilitation pipe newly formed inside the existing sewer main 10 is filled in the factory-produced tubular lining material 12 and the outer sewer main 10. The combined thickness W of the resin layer is obtained. In addition, the thickness of the filling resin layer filled outside the tubular lining material 12 can be changed by adjusting the resin pressure in the uncured resin filling region X, and the diameter and state of the sewer main 10 to be repaired. Will be adjusted according to.

  According to this embodiment, the tubular lining material 12 to be inverted is not required to be completely impregnated with uncured resin at the factory. That is, since the tubular lining material 12 is further impregnated with the supply of the uncured resin in the sewer main pipe 10 described above, an impregnation state that does not satisfy the impregnation in the finished state is sufficient at the factory. .

  Further, after the inversion, the impregnation state of the uncured resin in a state where the bubbles are removed in advance can be ensured by performing a certain degree of impregnation of the tubular lining material located inside at the factory. Therefore, it is possible to ensure a high-quality layer that is accurately degassed in the rehabilitated pipe after completion. Therefore, the reliability of the rehabilitated pipe is higher than when a completely unimpregnated core material is introduced into the existing pipe and the existing pipe at the construction site is impregnated with the uncured resin.

  Furthermore, compared with the case where all the impregnation operations are performed at the construction site of the sewer main 10, the smoothing can be ensured accurately. Therefore, the smoothness of the inner surface of the completed rehabilitation pipe is also ensured by the smooth state of the inner surface of the tubular lining material 12 positioned at the innermost side when completed.

  In addition, when the tubular lining material is completely impregnated with the uncured resin, there is a problem that the resin in the tubular lining material is likely to be shifted in a state where it is stored before construction. That is, there is a possibility that unevenness occurs in the thickness of the impregnated resin. Such a shift can be prevented by the impregnation of a certain amount that is less than the amount of impregnation as in this embodiment.

  As described above, since one lined pipe, that is, one rehabilitated pipe is completed as a whole by curing the tubular lining material 12 and the uncured resin layer outside the tubular lining material 12, durability with sufficient strength and strength at the construction site. Installation of rehabilitation pipes with excellent properties is achieved. As a result, the tubular lining material 12 manufactured in advance in the factory can have a smaller amount of resin impregnation and a smaller thickness than conventional ones, and weight reduction can be achieved. Therefore, shortening of manufacturing time and easy transportation to a construction site are achieved.

  Further, the uncured resin filled on the outside of the tubular lining material 12 after the reverse insertion penetrates and enters the cracks and recesses formed on the inner wall surface of the sewer main pipe 10. Therefore, the inner wall surface of the existing pipe can be repaired at the same time. Further, the penetration of the resin into the existing pipe inner wall surface effectively suppresses the generation of a gap between the resin and the existing pipe inner wall surface due to shrinkage when the resin is cured.

  The tubular lining material 12 is formed by impregnating a lining core material with an uncured resin. The lining core material is composed of, for example, glass fiber, felt (nonwoven fabric), or a combination of both. And has the effect of impregnating the resin. Moreover, the uncured resin to be impregnated is, for example, a vinyl ester resin, an unsaturated polyester resin, an epoxy resin, or the like.

  FIG. 3 shows another embodiment, and the same reference numerals are given to the same elements as those in the above embodiment. As shown in the figure, in this embodiment, before the tubular lining material 12 impregnated with a predetermined amount of uncured resin is inverted and inserted into the sewer main pipe 10, it is flexible in the sewer main pipe 10. A tubular impermeable membrane 30 having elasticity and adhesion to the uncured resin impregnated in the tubular lining material 12 and the uncured resin filled in the uncured resin filled region X after curing is provided. be introduced. This tubular impermeable membrane 30 can be expanded to have a diameter slightly larger than at least the inner diameter of the sewer main pipe 10, and is flexible enough to follow the deformation of the existing pipe. For example, it can be formed from a material such as polyester, and it is also preferable to reinforce by adding a jacket (outer layer) woven from nylon fiber, vinylon fiber, cotton or the like.

  In the present embodiment, the reverse insertion operation of the tubular lining material 12 is performed from the inside of the tubular impermeable membrane 30, and the expansion of the tubular lining material 12 is performed so as to press the tubular impermeable membrane 30 against the inner wall surface of the sewer main pipe 10. Go done. Further, the uncured resin filled in the uncured resin filling region X enters and fills between the outer surface of the inverted tubular lining material 12 and the tubular water-impermeable film 30. By this ingress filling, the impregnation of the uncured resin into the tubular lining material 12 is sufficiently supplemented, and a resin layer is added to the outside of the tubular lining material 12.

  Since the tubular impermeable film 30 already exists on the outside of the tubular lining material 12, no direct penetration of uncured resin into the cracks or recesses of the inner wall surface of the sewer main pipe 10 occurs, but the tubular impermeable film Since 30 has flexibility and stretchability, intrusion of uncured resin also occurs within a range where the expansion occurs. When the tubular impermeable membrane 30 is present, due to ground deformation caused by an earthquake or the like, a gap or deformation occurs at a joint location of the sewer main 10 or a crack occurs. Can extend or deform within the allowable range of expansion and contraction to cover the gaps and the like.

  The effect of the tubular impermeable membrane 30 is not only on the sewer main pipe 10 on the outer side but also on the rehabilitation pipe (the tubular lining material 12 and the outer resin layer) formed inside the tubular impermeable membrane 30. It also functions in the same manner when the above deformation or generation of a gap occurs. Therefore, the water tightness at that portion can be maintained for a while, and secondary disasters such as water leakage from the sewer main 10 can be prevented until further repair is performed.

  In the case where groundwater leaks into the sewer main 10 due to a crack or the like occurring in the sewer main 10, the presence of the tubular impermeable membrane 30 causes the groundwater to enter the sewer main 10. Can be prevented, and the adverse effect on the hardening operation of the resin of the tubular lining material 12 due to water immersion can be avoided. For example, it is possible to prevent a situation in which the groundwater is directly applied to the tubular lining material 12 and the curing action is stopped before the tubular lining material 12 is cured. Conversely, when a relatively large crack has occurred in the sewer main 10, the uncured resin filled in the sewer main 10 leaks out of the sewer main 10 through the crack. This can be surely prevented by the presence of the tubular impermeable membrane 30.

  Further, at least the surface of the tubular water-impermeable film 30 that contacts the tubular lining material 12 has adhesiveness after curing with respect to the uncured resin, so that the resin filled outside the tubular lining material 12 is cured. After that, it surely adheres to the cured resin.

  In addition, the tubular lining material 12 that has been inverted and the uncured resin layer filled on the outside form a new rehabilitation pipe that is sufficiently strong and durable. The tubular lining material 12 manufactured in this manner can be reduced in weight, the smoothness of the innermost surface of the rehabilitated pipe can be ensured, and the presence of the tubular lining material 12 that has been impregnated with resin to some extent can be removed accurately. The actions such as securing the rehabilitation pipe layer are the same as those according to the embodiment of FIG.

  It is also preferable to apply a rubber coating on the outer surface of the tubular water-impermeable membrane 30, and due to its extensibility, followability in a state in which waterproofness against deformation of the sewer main pipe 10 that is an existing pipe is maintained. Will improve.

  FIG. 4 shows still another embodiment, and the same reference numerals are given to the same elements as those in the above embodiments. As shown in the figure, in the present embodiment, the tubular impermeable film 30 previously contacts the inner side surface of the tubular lining material 12 in the tubular lining material 12 before being inverted and inserted. It is attached in a state. The properties and functions of 30 are the same as those described above. The tubular lining material 12 is inverted and inserted into the sewer main pipe 10 with 30 attached to the inner surface.

  Then, the uncured resin filling region X as the uncured resin supply step enters and fills the uncured resin with the tubular impermeable film 30 and the sewer main pipe 10 inner wall surface that are reversed and moved to the outer surface side of the tubular lining material 12. Between. Therefore, the tubular water-impermeable film 30 exists on the outer surface of the tubular lining material 12 inserted by inversion, and further, the uncured resin enters and fills the outer side from the uncured resin filled region X. Therefore, when these are hardened, an integrated rehabilitation pipe consisting of three layers in which the tubular impermeable membrane 30 exists as an intermediate layer is completed in the sewer main pipe 10. In the present embodiment, both surfaces of the tubular impermeable film 30 have adhesion to the resin, and both surfaces are firmly attached to the cured resin layer in a state where the uncured resin of the inner and outer layers is cured.

  As described above, in this embodiment, the various advantages of the embodiment in which uncured resin enters and fills the outermost layer described in FIG. 2 described above, and the flexibility and stretchability described in FIG. The rehabilitation pipe | tube which combines the advantage by the function of the tubular impermeable film 30 to have is formed. For example, even when the sewer main pipe 10 changes in shape and the outermost rehabilitation pipe portion (the layer filled with ingress) and further the inner rehabilitation pipe portion (tubular lining material 12) are damaged, the tubular non-removable pipe portion is not removed. The water permeable membrane 30 can be extended and deformed to exhibit a water stop function.

  In addition, the tubular lining material 12 that has been inverted and the uncured resin layer filled on the outside form a new rehabilitation pipe that is sufficiently strong and durable. The tubular lining material 12 to be manufactured is reduced in weight, the smoothness of the innermost surface of the rehabilitated pipe is ensured, and the bubbles are accurately removed due to the presence of the tubular lining material 12 impregnated with resin to some extent at the factory. The action of securing the rehabilitated pipe layer is the same as that according to the embodiment of FIG.

  FIG. 5 shows still another embodiment, and the same reference numerals are given to the same elements as those in the above embodiments. As shown in the figure, in this embodiment, before the tubular lining material 12 is introduced into the sewer main pipe 10, the lining core material 50 not impregnated with uncured resin is introduced into the sewer main pipe 10. (Unimpregnated lining core material introduction step). Thereafter, the tubular lining material 12 is reversely inserted into the lining core material 50. The infill filling from the uncured resin filling region X of the uncured resin as the uncured resin supply step is performed as an impregnation of the uncured resin to the outer lining core 50 together with the complementary impregnation of the tubular lining material 12. Done. In this embodiment, in the state where the outer lining core member 50 has been impregnated, the uncured resin further enters the outer side of the outer lining core 50, and also enters the concave portion of the inner wall surface of the sewer main pipe 10.

  In the present embodiment, unlike the above embodiments, the core material also exists in the lining layer formed at the time of construction outside the tubular lining material 12, and the core material as a whole after curing is sufficient. A high-strength rehabilitation tube having a thickness is obtained. In addition, as described above, the uncured resin reaches the inner wall of the sewer main 10, so that it is possible to prevent the gap caused by the shrinkage when the resin is cured and the repairing action for the recesses and cracks on the inner wall of the sewer main 10. A function can also be performed.

  In addition, the tubular lining material 12 that has been inverted and the uncured resin layer filled on the outside form a new rehabilitation pipe that is sufficiently strong and durable. Air bubbles due to the presence of the tubular lining material 12 impregnated with resin to some extent, such as reducing the weight of the tubular lining material 12 to be manufactured, ensuring the smoothness of the innermost surface of the rehabilitated pipe, and manufacturing the factory. The action of securing the rehabilitated pipe layer is the same as that according to the embodiment of FIG.

  Although not shown, the tubular impermeable membrane 30 described above is installed on the outer side of the lining core 50 installed outside, that is, on the side in contact with the sewer main pipe 10 in the embodiment shown after the figure. In this case, it is possible to perform an insertion operation of each layer, and in that case, there is no intrusion into a crack or the like in the sewage main pipe 10 of the uncured resin that advances further outward from the lining core 50. The above-described tubular impermeable membrane 30 can be supplemented by deformation and breakage of the sewer main pipe 10 and the completed rehabilitation pipe due to the stretchability and flexibility.

  FIG. 6 shows still another embodiment, and the same reference numerals are given to the same elements as those in the above embodiments. As shown in the figure, this embodiment is characterized by the reverse insertion of the tubular lining material 12 inside the unimpregnated lining core 50 performed after the introduction of the unimpregnated lining core 50 in the embodiment shown in FIG. have. That is, in the tubular lining material 12, the tubular impermeable film 30 having the above-described properties is attached. Inversion insertion of the tubular lining material 12 is performed in a state where the tubular impermeable film 30 is in close contact with the inner surface thereof. Therefore, the infilling of the uncured resin from the uncured resin filling region X as the uncured resin supply step is unimpregnated located outside the tubular water-impermeable film 30 that is reversed and moved to the outer surface of the tubular lining material 12. This is performed as ingress filling into the lining core 50.

  Accordingly, the completed rehabilitation pipe is a three-layered rehabilitation pipe having the tubular impermeable membrane 30 as an intermediate layer. 4 is different from the embodiment of FIG. 4 in that a lining pipe having a core material can be formed also in the outermost lining layer portion in contact with the sewer main pipe 10. Accordingly, all the operational effects of the repair method according to the embodiment shown in FIG. 4 can be achieved, and the reliability, such as the strength and durability of the rehabilitated pipe that is integrally completed, can be made higher.

  In addition, the tubular lining material 12 that has been inverted and the uncured resin layer filled on the outside form a new rehabilitation pipe that is sufficiently strong and durable. The tubular lining material 12 to be manufactured is reduced in weight, the smoothness of the innermost surface of the rehabilitated pipe is ensured, and the bubbles are accurately removed by the presence of the tubular lining material 12 impregnated with resin to some extent at the factory. The action of securing the rehabilitated pipe layer is the same as that according to the embodiment of FIG.

  FIG. 7 shows still another embodiment, and the same reference numerals are given to the same elements as those in the above embodiments. In the present embodiment, the uncured resin impregnated in the lining core 12 in advance and the resin of the resin layer 70 formed by ingress filling from the uncured resin filling region X in the uncured resin supply step are differently cured. Resin having the property is used.

  In the present embodiment, for example, a photocurable uncured resin is used as an uncured resin that is pre-impregnated into the inner tubular lining material 12, and the resin of the outer resin layer 70, that is, the uncured resin filling region X is filled. As the resin to be used, a thermosetting uncured resin is used. Therefore, not only accurate repair of the inner wall surface of the sewer main pipe 10 described above and facilitation of manufacturing the tubular lining material 12 in the factory, but also the accuracy and certainty of the curing operation for the lining pipe having a sufficient thickness at the same time. Has improved. That is, the inner tubular lining material 12 is cured by irradiation of ultraviolet rays, and the heat generated during the photocuring can be used to assist the curing and curing of the resin layer 70 that is the outer layer.

  That is, in this invention, since the tubular lining material 12 manufactured beforehand in an inner factory and the formation part in the sewer main pipe 10 which is a construction site exist, the property of these resin differs, respectively. It can be easily performed. Therefore, as described above, photocuring and heat curing can be used in combination, and the photocuring type has a limitation on the thickness of the rehabilitation tube because it has excellent speediness but has a problem with permeability. Although the allowable range of the thickness is large, the rehabilitation pipe that covers the drawbacks can be easily configured by combining the advantages of the thermosetting type that is inferior in the speed of curing. Of course, various known materials can be applied to the resin for thermosetting and the resin for photocuring used for forming the rehabilitation tube.

  It is also possible to use a resin for thermosetting both inside and outside, and to apply resins having different curing temperatures to the inner layer and the outer layer. In other words, since the inner tubular lining material and the outer filling resin layer are formed separately, by using a resin that cures at a lower temperature than the inner layer, the rehabilitation pipe having a large thickness as a whole can be obtained. Curing performance can be improved.

  FIG. 8 shows another configuration example of the uncured resin supply device 16 and the like used for forming the rehabilitation pipe according to each of the above embodiments. The formation of the uncured resin filling region X by the uncured resin supply device 16 must be performed while moving the uncured resin filling region X in synchronization with the reverse insertion operation of the tubular lining material 12. The movement of the region X is performed by pulling from the manhole 102 side, for example. That is, it is performed by pulling and moving the pump 20 and the uncured resin supply device 16 connected to the pump 20 by the connecting member 19. The traction can be used by providing the supply hose 22 with a strength.

  During the movement of the uncured resin filled region X, the uncured resin supply device 16 and the pump 20 bring the pressure in the uncured resin filled region X to an appropriate state with respect to the operation of reverse insertion of the tubular lining material 12. It must be done while keeping.

  That is, a brush-like brake means 80 is provided on the outer side of the pump 20 in order to appropriately move by pulling from the manhole 102 side while resisting the pressure of reverse insertion of the tubular lining material 12. Yes. The brush-like brake means 80 has a metal bristle portion 80a, and this bristle portion 80a is brought into contact with the inner wall surface of the sewer main pipe 10 to exhibit a braking function. By adopting such a brush-like brake 80, fine adjustment of the braking force can be performed relatively easily by adjusting the hardness and amount of the bristle portion 80a of the brush. Therefore, the uncured resin-filled region X can be moved while maintaining an appropriate pressure state, and the thickness of the resin layer formed outside the tubular lining material 12 can be made appropriate. Although not shown, the tip of the brush bristles 80a has an appropriate elasticity so as not to be damaged by scraping the inner wall surface of the sewer main pipe 10, which is an existing pipe. Is bent or formed to have an outer shape with no corners.

  In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible within the range of the summary of invention. For example, as the uncured resin used for the tubular lining material 12 and the uncured resin filling region X, various types of already known resins can be adopted. In addition, the means for forming the uncured resin filling region X and allowing the uncured resin to enter and fill the outer side of the tubular lining material 12 is not limited to the case of using an apparatus such as the uncured resin supply device 16 described above, but reverse insertion. It is sufficient that the uncured resin can be always filled with a predetermined pressure on the outside of the tubular lining material, and it is also possible to use uncured resin supply means having other configurations.

It is the whole sewer system explanatory drawing which shows the state where the existing pipe repair construction method which concerns on embodiment is actually applied. It is structure explanatory drawing of the rehabilitation pipe | tube introduced by the existing pipe repair construction method which concerns on embodiment. It is composition explanatory drawing of the rehabilitation pipe | tube introduce | transduced by the existing pipe repair method which concerns on other embodiment. It is composition explanatory drawing of the rehabilitation pipe | tube introduce | transduced by the existing pipe repair method which concerns on other embodiment. It is composition explanatory drawing of the rehabilitation pipe | tube introduce | transduced by the existing pipe repair method which concerns on other embodiment. It is composition explanatory drawing of the rehabilitation pipe | tube introduce | transduced by the existing pipe repair method which concerns on other embodiment. It is composition explanatory drawing of the rehabilitation pipe | tube with which the property of hardening differs in the inner and outer layers introduce | transduced by the existing pipe repair method which concerns on other embodiment. It is the whole sewer system explanatory drawing which shows the state where the existing pipe repair method concerning other embodiment is actually applied. It is explanatory drawing which shows the structural example of the brush-like brake used for embodiment of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sewer main 12 Tubular lining material 16 Uncured resin supply apparatus 16a Apparatus main body part 17 Inlet 22 Supply hose 24 Packing 30 Tubular impermeable film 50 Unimpregnated lining core 70 Resin filled from uncured resin filling area X Layer 80 Brush brake 100, 102 Manhole X Uncured resin filling area

Claims (10)

An existing pipe repair in which a tubular lining core material and a tubular lining material formed by impregnating this with an uncured resin are cured in a state where they are introduced into an existing pipe to be repaired, and the existing pipe is repaired. In the construction method,
The introduction of the tubular lining material is
After impregnating the lining core material with a predetermined amount of uncured resin, the lining core material is inserted into the existing pipe while being expanded to the existing pipe inner wall surface by reversing operation,
During the reverse insertion operation, the uncured resin is supplied from the front in the reverse insertion direction so that the uncured resin enters and fills between the inverted tubular lining material and the existing pipe inner wall. An existing pipe repair method characterized in that a supply process is performed. Before the inverted insertion of the tubular lining material into the existing pipe,
A tubular impermeable membrane having flexibility, stretchability and adhesion after curing to the uncured resin is introduced into the existing pipe,
The inversion insertion operation performed while expanding the tubular lining material to the existing pipe inner wall surface side is performed from the inside of the tubular impermeable film,
In the uncured resin supply step, the uncured resin enters not between the inverted tubular lining material outer surface and the existing pipe inner wall surface, but between the inverted tubular lining material outer surface and the tubular impermeable film. Filling is performed, The existing pipe repair method of Claim 1 characterized by the above-mentioned. In the tubular lining material before the reverse insertion, a tubular water-impermeable film having flexibility, stretchability and adhesion to the uncured resin after curing is brought into close contact with the inner surface of the tubular lining material. It is attached in a state, and in that state, the reverse insertion operation into the existing pipe and the uncured resin supply step are performed,
In the uncured resin supply step, the tubular impermeable membrane and the existing pipe inner wall surface that are reversed and moved to the outer surface side of the tubular lining material, not between the inverted tubular lining material outer face and the existing pipe inner wall face. The existing pipe repairing method according to claim 1, wherein an uncured resin is filled in between the two. Before introducing the tubular lining material into the existing pipe, an unimpregnated lining core material introducing step of introducing a lining core material not impregnated with uncured resin is performed,
Thereafter, performing the reverse insertion operation of the tubular lining material into the lining core material and the uncured resin supply step,
The existing pipe repair method according to claim 1, wherein in the uncured resin supply step, the unimpregnated lining core material is also impregnated with the uncured resin. Inversion insertion of the tubular lining material into the unimpregnated lining core material performed after the introduction of the unimpregnated lining core material,
The tubular impermeable film having flexibility, stretchability and adhesion to the uncured resin after curing is performed by reversing insertion of a tubular lining material adhered in a state where the outer surface is in close contact with the inner surface,
In the uncured resin supply step, the uncured resin is impregnated and filled into the unimpregnated lining core material positioned outside the tubular impermeable film that has been reversed and moved to the outer surface of the tubular lining material. The existing pipe repair method according to claim 4, wherein   The uncured resin that is impregnated in advance into the lining core and the uncured resin that is supplied in the uncured resin supply step are those having different curability. The existing pipe repair method described in item 1.   A photo-curing uncured resin is used as the uncured resin impregnated in advance in the lining core material, and a thermosetting uncured resin is used as the uncured resin supplied in the uncured resin supply step. The existing pipe repair method according to claim 5, wherein: Supply of uncured resin from the front in the reverse insertion direction during the reverse insertion operation,
A closed space is formed in the existing pipe in front of the tubular lining material that has been inverted and inserted, and the closed space is filled with the uncured resin to form an uncured resin-filled region, to the existing pipe of the tubular lining material. The reversal insertion operation is performed while the leading portion enters the uncured resin-filled area ahead, and the uncured resin-filled area sequentially moves in the insertion direction as the tubular lining material is inserted. The existing pipe repair method according to any one of claims 1 to 7, wherein the pipe repair method is formed. Formation of the uncured resin filled region is
Closed means for forming the closed space movably installed in the existing pipe, an uncured resin injection mechanism for injecting an uncured resin into the closed space with a predetermined pressure, and a reverse inversion insertion of the closed means The existing pipe repairing method according to claim 8, wherein the existing pipe repairing method is performed by an uncured resin supply device that includes a brake unit that is provided forward in the direction and is pressed against an inner wall surface of the existing pipe to perform a braking function. The brake means of the uncured resin supply device is:
A brush-like outer surface is provided, which restrains the uncured resin supply device against an internal pressure of the uncured resin filling region caused by the injection of the uncured resin and generates a braking force capable of pulling and moving. Pipe repair method.

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