JP5620675B2 - Pipe repair structure, repair method and laminated lining material - Google Patents

Description

  The present invention uses a repair structure when a deteriorated pipeline is repaired by a lining material impregnated with a curable resin, a repair method for repairing a deteriorated pipeline, and a repairing method for a deteriorated pipeline. And an advantageous laminated lining material.

  At present, many pipes such as pipes for sewers, pipes for industrial water, and pipes for agricultural water are laid and used. For example, a sewer pipe 50 shown in FIG. 5 is generally configured by connecting a plurality of pipes 51 typified by a fume pipe, and a manhole 52 is installed at an appropriate distance. Is.

  The pipe 51 constituting the pipe line 50 includes a straight pipe part 51b having a preset thickness, and an enlarged diameter part 51d having a tapered part 51c formed at one end of the straight pipe part. Generally, it is configured. And when connecting the some pipe | tube 51 when comprising the pipe line 50, the edge part of the straight pipe part 51b of the other pipe | tube 51 is inserted in the enlarged diameter part 51d of one pipe | tube 51. FIG. For this reason, the joint part 53 of the pipes 51 is formed with a joint between the pipe ends.

  The pipe 50 as described above deteriorates with an increase in the period of use, and the inner peripheral surface 51a of each pipe 51 becomes rough, or the connection portion 53 between the pipes 51 is affected by ground subsidence, earthquake, or the like. It may shift. And in the pipe 50 in which the internal peripheral surface 51a of the pipe 51 deteriorated, there exists a possibility that the intensity | strength of each pipe 50 may fall, and in the pipe 50 in which the connection part 53 shifted | deviated, there exists a possibility that a joint may expand and groundwater may leak. is there. For this reason, it is common to repair the pipe 50 between adjacent manholes 52 by lining it.

  In such a pipeline that has deteriorated until repair is required, the inner peripheral surfaces of the individual pipes constituting the pipeline are rough, and aggregates (sand and gravel) are exposed on the entire surface. In general, an uneven surface is formed.

  When repairing by lining the inside of a deteriorated pipe, the method of using a lining material impregnated with a curable resin in the impregnated base material, the method of using a ready-made renovated pipe piece, etc. It is selectively adopted corresponding to various conditions including the aperture.

  For example, in Patent Document 1, a lining layer is formed using a sleeve in which a fiber base material is impregnated with a thermosetting resin, or a lining material in which a fiber base material is impregnated with a photocurable resin and a thermosetting resin. A method for repairing pipelines is proposed. In this method, after the uncured lining material is drawn into the inside of the pipeline and expanded to adhere to the inner wall surface, a light source is run inside the expanded lining material to irradiate the light, and the inner light The curable resin is cured. At this time, the photocurable resin generates heat as the curing progresses, and this heat is transmitted to the outer thermosetting resin and the thermosetting resin is cured. Can be rehabilitated.

  In the repair method described above, two manholes can be connected by a single pipe made of a cured lining material, regardless of the number of pipes constituting the pipe line and the state of displacement between the connected pipes. For this reason, the strength of the pipeline whose strength is reduced due to the deterioration of the inner peripheral surface can be improved, and water leakage can be prevented even in the pipeline where the joint portion is displaced and the joint is enlarged.

  Further, in Patent Document 2, when repairing a deteriorated existing pipe, a conventional repair method using a rehabilitated pipe piece and a repair method using a lining material impregnated with a curable resin are used. Proposals have been made to solve the problem that gaps are formed between them.

  That is, in the conventional repair method using a rehabilitated pipe piece, it is essential to feed the filler into the gap between the existing pipe and the rehabilitated pipe after the rehabilitated pipe piece is inserted into the existing pipe, but the gap is not so large. Therefore, there is a problem that the operation of uniformly injecting the curable filler is not easy. In addition, the repair method using a lining material impregnated with a curable resin has a smaller gap than the repair method using a rehabilitated pipe piece, but the lining material shrinks when cured, creating a gap between existing pipes. Has the problem of fear. Furthermore, when the work is performed while feeding the curable filler into the gap between the lining material and the existing pipe, there is a problem that this work becomes complicated and difficult.

  For this reason, in the technique described in Patent Document 2, at least before the introduction of the rehabilitated pipe into the existing pipe, the deformability deformed by receiving at least the pressing force, and between the rehabilitated pipe and the existing pipe after the rehabilitated pipe is introduced. A cylindrical intermediate member having a size that fills the gap in a pressed state is installed in the existing pipe. According to this repair method, the gap between the existing pipe to be repaired and the renovated pipe can be easily and reliably eliminated. For this reason, the effect that the stable favorable installation state of the renovated pipe with respect to the existing pipe can be ensured is exhibited.

  In the method described in Patent Document 1, compressed air of about 0.05 MPa to 0.07 MPa is blown into the interior of an uncured lining material drawn into the pipe and expanded. For this reason, the outer peripheral surface (outer film) of the lining material is constrained by being pressed against the inner peripheral surface of the pipe, and an uneven surface is formed along the unevenness of the inner peripheral surface. Although the diameter of the lining material is reduced as the lining material is cured, the outer peripheral surface of the cured lining material maintains an uneven shape.

  In the pipe line repaired by the lining material cured as described above, a slight gap is formed between the inner peripheral surface of the pipe line by slightly reducing the diameter by hardening the lining material. The concavo-convex shape of these substantially coincides. However, since the lining material located at the connecting portion of the pipe faces the gap formed by the tapered portion that forms the expanded diameter portion, the outer peripheral surface of the expanded lining material is not constrained and maintains a smooth state. And harden.

  In the method using a curable lining material made of a thermoplastic material described in Patent Document 2, the cylindrical intermediate member is connected to the inner surface of the sewer main and the tubular lining material in a state where the restoring operation of the tubular lining material is almost completed. The gap between is completely filled.

JP 2003-033970 A JP 2009-101596 A

  When the pipe line deteriorated by the lining material impregnated with the curable resin is repaired as in the technique described in Patent Document 1, the pipe and the lining material are constrained by meshing with each other. However, the lining material located at the connecting portion between the tubes is not restricted by the individual tubes. For this reason, when a force in the axial direction or the direction crossing the axis acts on the pipe due to an earthquake or ground subsidence, the hardened lining material facing the inner peripheral surface of each pipe and each pipe is The relative movement of the pipes that move together and are connected to each other is concentrated on the connecting portion.

  However, the pipes in the connecting portion are not firmly connected to each other, and are configured to move relative to each other according to the force acting on the individual pipes. For this reason, with the relative movement of the tubes, a large force acts on the cured lining material located at the connecting portion of the tubes. When the force acting on the lining material exceeds the ultimate strength of the lining material, the lining material is broken. When the lining material breaks, there is a risk that groundwater leaks from the connecting portion of the pipe. If groundwater leaks into the pipeline, the amount of sewage treatment increases, which may increase the cost required for sewage treatment.

  In the technique described in Patent Document 2, a cylindrical intermediate member is previously installed on the inner side surface of an existing pipe, and thereafter, an operation of inserting a rehabilitating pipe piece or an operation of inserting a curable lining material is performed. For this reason, when inserting the rehabilitation pipe piece, the outer peripheral surface rubs against the inner peripheral surface of the cylindrical intermediate member, which may cause a large frictional resistance. Further, when the curable lining material is inserted, a special process for making the cylindrical intermediate member self-supporting along the inner side surface of the existing pipe is necessary, and the work may be complicated.

  The object of the present invention is to allow relative movement between the individual pipes constituting the pipe and the lining material, thereby causing movement caused by an earthquake or ground subsidence in the pipe. Even in such a case, the pipe repair structure that reduces the force acting on the lining material located at the joint of the pipe, the repair method that realizes this repair structure, and the lamination that is advantageous when this repair method is carried out It is to provide a lining material.

In order to solve the above-described problems, the pipe repair structure according to the present invention includes a deteriorated pipe impregnated with a curable resin and a flexible lining material, and expands the lining material. It is a repair structure of a pipe line that has been repaired by curing a curable resin, and is made of an elastic nonwoven fabric or foam between the inner peripheral surface of the deteriorated pipe line and the outer peripheral surface of the cured lining material. A material is elastically deformed and a synthetic resin film is disposed between the elastic material and the cured lining material .

In the pipe repair structure, the synthetic resin film has stretchability and can allow relative movement between at least an elastic material or a cured lining material. preferable.

  The lining material impregnated with the curable resin includes an impregnated base material impregnated with the curable resin, and prevents leakage of the curable resin impregnated at the time of storage or transportation, and blocks heat or blocks light. And a film disposed on the outer surface. And when this lining material is pulled and pulled from the front-end | tip part, the said film becomes an outer film left as it is. When the lining material is pulled in while being reversed, the impregnated base material may be exposed on the outer peripheral surface of the lining material after the reversal so that no film exists. In this case, the outer film becomes an inner film.

  Thus, when the outer film arrange | positioned on the outer surface of a lining material is left behind, it is possible to utilize this outer film as a synthetic resin film. However, it is natural that a synthetic resin film may be provided in addition to the outer film.

  In any one of the above-described pipe repair structures, the elastic material is formed in a cylindrical shape, and the outer diameter of the elastic material exceeds the inner diameter of the pipe in which the outer diameter deteriorates when no force is applied in the diameter direction. It is preferable that it is formed in a small size with no dimension, and is configured so that it can be elastically deformed by being constricted by the inner peripheral surface of the deteriorated pipe line and expanding in accordance with the force acting in the diametrical direction.

In the first pipe repair method according to the present invention, a deteriorated pipe is formed by disposing an elastic material made of a nonwoven fabric or foam having elasticity between the inner peripheral surface of the deteriorated pipe and the cured lining material. A repair method for repairing a road, which is elastic and flexible, formed of a non-woven fabric or foamed elastic material, or elastic and flexible and formed in a cylindrical shape. A synthetic resin film made of non-woven fabric or foam and having stretchability on at least a surface facing a cured lining material and allowing relative movement between at least the elastic material or the cured lining material The elastic material provided is drawn into the pipe of the sewer which has deteriorated in a reduced diameter state, and then the elastic material drawn into the pipe is impregnated with a curable resin and is flexible. Pull the uncured lining material with Then, the uncured lining material is expanded, the elastic material outside the uncured lining material is pressed against the inner peripheral surface of the pipe line, and elastically deformed, and then the uncured The lining material in a state is expanded, the elastic material is pressed against the inner peripheral surface of the pipe line, the elastically deformed state is maintained, and the curable resin impregnated in the lining material is cured. Is.

  When pulling an elastic material into a pipe line or pulling an uncured lining material impregnated with a curable resin into an elastic material, the manhole on one side is pulled while the tip of the elastic material or the lining material is constrained To the other side of the manhole (retraction method) and the tip of the elastic material or lining material is restrained and fixed to one manhole, while the other side is reversed while the inner surface on the back side is reversed from the tip There is a method of laying in the manhole (reversal method), both of which are generally employed. For this reason, in the present invention, an elastic material or a lining material, and further, a laminated lining described later is referred to as “drawing” into the pipe line, and in this case, any of the above-described drawing method or reversing method is included.

In the second pipe repair method according to the present invention, a deteriorated pipe is formed by disposing an elastic material made of a nonwoven fabric or foam having elasticity between the inner peripheral surface of the deteriorated pipe and the cured lining material. A repair method for repairing a road, which is previously formed into a cylindrical shape having elasticity and flexibility, or an elastic material made of a nonwoven fabric or foam having elasticity and flexibility, or having elasticity and flexibility. Synthetic resin made of a non-woven fabric or foam, which has elasticity at least on the surface facing the cured lining material and can allow relative movement between at least the elastic material or the cured lining material The elastic material provided with a film is impregnated with a curable resin and laminated with a flexible uncured lining material, and the laminated elastic material and the uncured lining material are reduced in diameter. Pull inside the deteriorated pipeline Then, the uncured lining material is expanded, the elastic material outside the uncured lining material is pressed against the inner peripheral surface of the pipe line, and elastically deformed, and then the uncured The lining material in a state is expanded, the elastic material is pressed against the inner peripheral surface of the pipe line, the elastically deformed state is maintained, and the curable resin impregnated in the lining material is cured. Is.

Further, the laminated lining material according to the present invention is a laminated lining material which is disposed inside a deteriorated pipeline and has flexibility for repairing the deteriorated pipeline, and is impregnated with a curable resin. And an elastic material made of a nonwoven fabric or foam having elasticity provided on a surface of the impregnation layer facing the inner peripheral surface of the deteriorated pipe line, and at least the impregnation of the elastic material A synthetic resin film is provided on the surface facing the layer .

In the laminated lining material, the synthetic resin film, be between the stretchability has and at least between the elastic material or the cured impregnating layer as it is capable of permitting relative movement preferable.

  In the pipe repair structure according to the present invention, the elastic material having elasticity between the inner peripheral surface of the deteriorated pipe and the outer peripheral surface of the hardened lining material is disposed in an elastically deformed state. The material contacts the inner peripheral surface of the deteriorated tube, and the outer peripheral surface of the lining material does not contact the inner peripheral surface of the tube. For this reason, even if unevenness is generated on the inner peripheral surface of the deteriorated pipe, no unevenness is formed on the outer peripheral surface of the lining material, and the cured lining material is isolated from the inner peripheral surface of the pipe by the elastic material. Will be.

  Thus, the individual tubes and the cured lining material are allowed to move relative to each other. For this reason, when an axial force or a force intersecting the axis acts on the pipe due to an earthquake or ground subsidence, the individual pipes constituting the pipe move according to the acting force. The cured lining material can tolerate the movement of individual tubes and can prevent the lining material from breaking.

  When the repair structure is configured by providing an elastic material provided with a synthetic resin film having elasticity and allowing relative movement between at least the elastic material on the surface facing the inner peripheral surface of the pipeline Since the synthetic resin film is in contact with the inner peripheral surface of the pipe line, even if the ground water has entered through the cracks of the pipes that make up the pipe line or the connecting parts of the pipes, It is possible to prevent groundwater from penetrating into the elastic material. In particular, when trying to repair a pipeline where groundwater is leaking with a lining material impregnated with a curable resin, the lining material may be cooled by the groundwater, preventing smooth hardening of the lining material. By preventing the intrusion of groundwater, it is possible to achieve smooth hardening. Furthermore, when a force acts on the pipe line due to an earthquake or ground subsidence, and individual pipes try to move, relative movement between the pipe line and the elastic material can be allowed.

  Further, by using an elastic material provided with a synthetic resin film which has elasticity on the surface facing the cured lining material and which can allow relative movement between at least the elastic material or between the cured lining material. When the repair structure is configured, friction with the outer peripheral surface of the cured lining material can be reduced. For this reason, the operation | work at the time of drawing in an uncured lining material inside an elastic material can be performed easily. Furthermore, when a force acts on the pipeline due to an earthquake or ground subsidence, and individual tubes are about to move, the elastic material is allowed to move relative to the cured lining material via the synthetic resin film. Therefore, a large force does not concentrate on the portion corresponding to the joint between the individual pipes constituting the pipe line in the cured lining material.

  The elastic material is formed in a cylindrical shape and has a dimension that does not exceed the inner diameter of the pipeline whose outer diameter has deteriorated when no force in the diametrical direction is applied, and expands according to the force acting in the diametrical direction. The elastic material disposed between the deteriorated pipe line and the hardened lining material is wrinkled by being configured to be elastically deformed by being constrained by the inner peripheral surface of the deteriorated pipe line. It is possible to maintain an elastically deformed state without any problems. In particular, since the elastic material does not wrinkle, the inner peripheral surface of the elastic material becomes a flat surface, and the relative movement between the pipe line and the cured lining material can be made smooth.

  In the first pipe repair method according to the present invention, the elastic material having elasticity and flexibility and having a cylindrical shape is reduced in diameter (for example, a state in which the elastic material is folded so that the diameter is reduced). Incorporating a curable resin into the elastic material that has been drawn in, and then drawing in the uncured lining material that is flexible, By expanding the uncured lining material, the elastic material outside can be pressed against the inner peripheral surface of the pipe and elastically deformed. Then, the curable resin impregnated in the lining material is cured while maintaining the expanded state of the uncured lining material, so that elasticity is provided between the inner peripheral surface of the pipe line and the outer peripheral surface of the cured lining material. Materials can be placed and repaired.

  Further, in the second pipe repair method according to the present invention, the elastic material having elasticity and flexibility is impregnated with a curable resin in advance and has flexibility. After the uncured lining material is laminated at the factory or on the ground, the laminated elastic material and the uncured lining material are drawn into the deteriorated pipeline in the reduced diameter state, and then uncured. The cured lining material is expanded and an elastic material outside is pressed against the inner peripheral surface of the pipe line, and can be elastically deformed. Then, the curable resin impregnated in the lining material is cured while maintaining the expanded state of the uncured lining material, so that elasticity is provided between the inner peripheral surface of the pipe line and the outer peripheral surface of the cured lining material. Materials can be placed and repaired.

  In each repair method described above, since the elastic material has elasticity, the elastic material is compressed by being sandwiched between the outer peripheral surface of the lining material and the inner peripheral surface of the pipe line as the lining material expands. The And it expand | swells (restores) with the diameter reduction accompanying hardening of a lining material. For this reason, an elastic material can be arrange | positioned, without forming a clearance gap between the internal peripheral surface of a pipe line, and the outer peripheral surface of a lining material. In this elastic material, the surface facing the inner peripheral surface of the pipe line is in close contact with the unevenness formed on the inner peripheral surface of each pipe constituting the pipe line, and the surface facing the outer peripheral surface of the lining material is not uneven. A smooth surface can be maintained. Therefore, the outer peripheral surface of the lining material does not mesh with the irregularities formed on the inner peripheral surface of the pipe line, and movement in the axial direction can be allowed.

  Further, in the laminated lining material according to the present invention, the elastic material is provided on the outer peripheral surface of the impregnated layer, so that the laminated lining material is drawn into the deteriorated pipe line to be expanded, so that the inner peripheral surface of the pipe line is expanded. An elastic material can be disposed between the outer peripheral surface of the impregnation layer, and the deteriorated pipeline can be repaired by curing the curable resin in this state. For this reason, easy construction can be realized.

It is a figure explaining the repair structure of a pipe line. It is a figure which illustrates typically the procedure of the 1st repair construction method. It is a figure which illustrates typically the procedure of the 2nd repair construction method. It is a figure explaining the structure of a laminated lining material. It is a figure which illustrates typically the composition of the pipe for sewage laid in the ground.

  Hereinafter, preferred embodiments of a pipe repair structure and repair method and a laminated lining material according to the present invention will be described.

  First, the pipe repair structure will be described with reference to FIGS. In the repair structure shown in the figure, the cured lining material 2 is formed by disposing the elastic material 1 between the inner peripheral surface 51a of the pipe 51 constituting the deteriorated pipeline 50 and the outer peripheral surface 2a of the cured lining material 2. And a relative movement between the pipe 50 and the pipe 50 are allowed. With this configuration, it is possible to reduce the force acting on the lining material 2 located at the connecting portion 53 between the pipes 51 when a force resulting from an earthquake or ground subsidence acts on the pipe line 50.

  As described above, the inner peripheral surface 51a of each pipe 51 constituting the deteriorated pipe line 50 is formed with unevenness due to rough skin due to deterioration. In particular, when the tube 51 is a fume tube, the inner peripheral surface 51a is formed with unevenness in an unmanaged state in which the aggregate is exposed.

  The elastic material 1 is disposed between the inner peripheral surface 51a of the tube 51 and the outer peripheral surface 2a of the cured lining material 2, and is compressed by being pressed toward the inner peripheral surface 51a of the tube 51 as the lining material 2 expands. (Elastic deformation). Then, by curing the curable resin impregnated in the lining material 2 in a state where the lining material 2 is inflated, the tube 51, the elastic material 1 and the lining material 2 maintain their respective arrangement positions and the tube. The road 50 is being repaired.

  That is, the hardened lining material 2 connects between the manholes 52 provided in the pipe line 50 as a single pipe, and the inner peripheral surface of the pipe line 50 deteriorated by the hardened lining material 2 is lined and repaired. Even when there is a deviation between the pipes 51, it is possible to prevent water leakage by the cured lining material 2 functioning as one pipe.

  In this embodiment, at least the surface (inner peripheral surface 1 b) of the elastic material 1 facing the lining material 2 has stretchability and is at least relative to the elastic material 1 or the lining material 2. Synthetic resin film 3 (3a) which can permit a general movement is provided. In addition to the inner peripheral surface 1 b of the elastic member 1, synthetic resin films 3 and 3 a are provided on both sides of the surface (outer peripheral surface 1 a) facing the inner peripheral surface 51 a of the pipe 50. In particular, the synthetic resin film 3 a provided on the outer peripheral surface 1 a of the elastic material 1 has stretchability and allows at least relative movement between the elastic material 1. Therefore, the elastic material 1 and the lining material 2 are in contact via the synthetic resin film 3 without being in direct contact. It should be noted that whether the synthetic resin film 3 and the lining material 2 are attached or not attached is not limited, and may be either an attached state or a non-attached state.

  As described above, the elastic material 1 is arranged in a state of being elastically deformed between the pipe 51 constituting the pipe line 50 and the lining material 2, and as shown in FIG. 1a contacts with the inner peripheral surface 51a of the tube 51 and becomes an uneven surface corresponding to the unevenness formed on the inner peripheral surface 51a. The inner peripheral surface 1 b holds a relatively flat surface regardless of the irregularities of the outer peripheral surface 1 a and is in contact with the outer peripheral surface 2 a of the lining material 2 cured through the synthetic resin film 3.

  Further, as shown in FIG. 3C, the outer peripheral surface 1 a of the elastic material 1 faces the seam formed in the connection portion 53 of the tube 51 at a position corresponding to the connection portion 53 of the tube 51.

  In the repair structure configured as described above, a force is applied to the pipe 50 during an earthquake or due to ground subsidence, and when this force is transmitted to each pipe 51, the force is applied to the inner peripheral surface 51a of the pipe 51. It is transmitted to the elastic material 1 through the formed unevenness. When the transmitted force is small, the elastic member 1 is deformed within a range where it can be elastically deformed and absorbs the force. When the transmitted force is large, it is transmitted from the elastic material 1 to the cured lining 2 through the synthetic resin film 3, but the anti-friction function between the synthetic resin film 3 and the elastic material 1 or between the lining material 2. To produce a relative movement (slip) between the elastic material 1 and the lining material 2.

  Accordingly, the cured lining material 2 is not firmly restrained by the respective pipes 51 and can be moved relative to the opposing pipes 51. For this reason, even if it is a case where a relative axial movement or relative rotation has occurred between the pipes 51 at the connecting portion 53, the position corresponding to the seam is accompanied by these movements. It is possible to prevent the force from being concentrated on the cured lining material 2.

  Further, by providing the synthetic resin film 3 on the inner peripheral surface 1b of the elastic material 1, when the uncured lining material 2 is drawn into the elastic material 1, the frictional resistance generated along with the drawing is reduced. It becomes possible to do. For this reason, when it uses when implementing the 1st repair method which concerns on this invention mentioned later, a load is reduced and it is advantageous.

  Further, when the pipe 51 is cracked or the like, or the connecting portion 53 is displaced and the groundwater is infiltrated, the infiltrated groundwater permeates the elastic material 1. However, since the infiltrated groundwater is muddy water, this mud penetrates into the elastic material 1 to cause clogging, and further penetration of water can be prevented. Therefore, the inundation of groundwater is limited to the local area and does not adversely affect the sewage flowing through the pipeline 50.

  FIG. 4D shows an example in which the synthetic resin film 3 a is provided on the outer peripheral surface 1 a of the elastic material 1. In this embodiment, the outer peripheral surface 1a of the elastic member 1 is in direct contact with the inner peripheral surface 51a of the conduit 50 via the synthetic resin film 3a. However, since the synthetic resin film 3a has elasticity and can move at least relative to the elastic material 1, the elastic material 1 and the synthetic resin film 3 are connected to the pipe line 50 as the lining material 2 expands. As the pressure comes into contact with each other, elongation occurs according to the unevenness of the inner peripheral surface 51a. For this reason, irregularities are also formed on the outer peripheral surface 1a of the elastic material 1. However, since the friction coefficient with the synthetic resin film 3a is small and relative movement is allowed, the influence of the irregularities can be reduced. is there.

  In the repair structure configured as shown in FIG. 4D, when the pipe 51 is cracked or the connecting portion 53 is displaced and the groundwater is infiltrated, the infiltrated groundwater is the inner peripheral surface of the pipe 50. And the synthetic resin film 3a. However, since the synthetic resin film 3a is kept in pressure contact with the inner peripheral surface 51a of the pipe line 50, the accumulated groundwater does not flow, and further infiltration of the groundwater can be prevented. Therefore, the inundation of groundwater is limited to the local area and does not adversely affect the sewage flowing through the pipeline 50. Further, there is no adverse effect when the uncured lining material is cured.

  In the repair structure configured as described above, the elastic member 1 needs to have elasticity, and preferably has flexibility. The elasticity of the elastic material 1 is not particularly limited as long as it is compressed according to the force when pressed with a strong force and can be restored when the force is removed. Further, the thickness of the elastic member 1 is not particularly limited, and is formed on the inner peripheral surface 51a or a thickness enough to absorb the unevenness formed on the inner peripheral surface 51a of the tube 51 when compressed. Even if the unevenness is reflected, it is preferable that the thickness is such that it does not affect the outer peripheral surface 2a of the lining material 2.

  The shape of the elastic material 1 is not particularly limited, and any one formed in a sheet shape or one formed in a cylindrical shape can be preferably used. For example, in the case of the elastic material 1 formed in a sheet shape, before being drawn into the pipe 50, by winding it around the outer peripheral surface 2a of the uncured lining material 2 at the factory or on the ground, It is possible to arrange between the pipe line 50 and the lining material 2. In the case of the elastic material 1 formed in a cylindrical shape, the elastic material 1 is drawn into the conduit 50 alone, and the uncured lining material 2 is drawn into the pipe 50, or is formed in a cylindrical shape in advance at the factory or on the ground. The uncured lining material 2 is drawn into the elastic material 1 and laminated (including reverse drawing), so that it can be disposed between the pipe line 50 and the lining material 2.

  As a material constituting the elastic material 1 as described above, it is possible to selectively use a nonwoven fabric (felt) made of plant fibers or chemical fibers or a foam of synthetic resin (for example, urethane foam). The elastic material 1 has a thickness of about 3 mm to about 10 mm in a free state and about 1 mm to about 5 mm in a compressed state, although the thickness varies depending on the material to be used and the density of the material. Anything that can be used can be used.

  Further, when the elastic material 1 is formed in a cylindrical shape, the end portions of the sheet-like elastic material 1 may be brought into contact with each other and stitched, or may be bonded by an adhesive or heat-welded. In any case, it is preferable to join by using an optimum method according to the material forming the elastic material 1.

  The elastic material 1 formed in a cylindrical shape has a dimension that does not exceed the inner diameter of the pipe line to be repaired. That is, the outer diameter of the elastic material 1 is set in consideration of the expansion / contraction performance of the material. And it expand | swells with expansion | swelling of the lining material 2, and press-contacts to the internal peripheral surface 51a of the pipe line 50. FIG. Therefore, the elastic material 1 is in a state of being stretched in the circumferential direction when pressed against the inner peripheral surface 51a of the pipe 50, and does not sag. That is, the elastic material 1 can be pressed against the inner peripheral surface 51a of the pipe line 50 in a state of being elastically deformed uniformly.

  The elastic material 1 may contact the outer peripheral surface 2a of the lining material 2 without interposing the synthetic resin 3, and the inner peripheral surface 1b is preferably a surface with low friction. For example, when the elastic material 1 is a non-woven fabric made of synthetic resin fibers, the exposed fiber portion is melted and re-welded by heating almost the entire inner peripheral surface 1b to form a smooth film surface. By making this, it is possible to reduce the friction. In the case of a synthetic resin foam, it is preferable to select a material having a small friction coefficient in advance.

  The lining material 2 is impregnated with a curable resin in an impregnated base material 2d, has sufficient flexibility in an uncured state, exhibits high strength when cured, and can repair a deteriorated pipeline 50. It is configured. As such a lining material 2, it is possible to use a lining material impregnated with a conventionally used curable resin as it is.

  The lining material 2 has a dimension in which the outer diameter is substantially equal to the inner diameter of the pipe line to be repaired, and is formed in a long shape. The length of the lining material 2 is not limited, and may be any length as long as it can be laid between two manholes 52 provided in the pipeline 50 to be repaired. The lining material 2 is stored in a state in which the curable resin is uncured, that is, in a flexible state, folded in the longitudinal direction and transported to a construction site.

  Examples of the curable resin constituting the lining material 2 include a photocurable resin that is cured by light irradiation and a thermosetting resin that is cured by heating. The thickness of the lining material 2, the material of the impregnated substrate 2d, and the like. It is suitably selected according to the conditions. For example, when the curable resin is a photocurable resin, the thickness through which the irradiated light can be transmitted is about 13 mm at the maximum. For this reason, when the thickness of the lining material 2 is smaller than 13 mm, it is possible to constitute the lining material 2 impregnated with only the photocurable resin. However, in the case of the lining material 2 having a thickness larger than 13 mm, the impregnated base material 2d is impregnated with only the thermosetting resin, or the photocurable resin is used in the thickness range where light can be transmitted. It is possible to form the lining material 2 by impregnating a portion that cannot permeate with a thermosetting resin.

  Also, prevent leakage of the impregnated curable resin during storage, transportation and construction, and if the curable resin is a photocurable resin, prevent light from being irradiated before construction on site. For this purpose, the outer peripheral surface of the uncured lining material 2 is protected by a light shielding film. In particular, it is difficult to uniformly impregnate the impregnated base material 2d with the curable resin. After the light shielding film is disposed outside the impregnated base material, the impregnated base material 2d is infiltrated with the curable resin from the outside. We work to press and impregnate mechanically. For this reason, there are some methods in which no film is arranged on the inner peripheral surface depending on the method employed.

  When the pulling method is adopted when the uncured lining material 2 is drawn into the elastic material 1, the outer peripheral surface of the lining material 2 becomes a surface facing the inner peripheral surface of the pipe 50, and the light shielding disposed on this surface. An outer film 2b is disposed as a film, and an inner film 2c is disposed on the inner periphery. In this case, the outer peripheral surface 2a of the lining material 2 is constituted by the outer peripheral surface of the outer film 2b.

  Further, as described above, when the reversal method is adopted when the uncured lining material 2 is drawn into the elastic material 1, a film may not be disposed on the inner surface. In this case, as the lining material 2 is reversed and pulled, the impregnated base material 2d impregnated with the curable resin is directly exposed to become the outer peripheral surface 2a and contact the inner peripheral surface 1b of the elastic material 1.

  The impregnated base material 2d constitutes a main part of the lining material 2 by impregnating a curable resin. The impregnating substrate 2d is not limited as long as it can be impregnated with a curable resin. However, since it is necessary to exhibit sufficient strength when the lining material 2 is cured, the impregnated substrate 2d is also preferably capable of exhibiting high strength as the curable resin is cured. Examples of such impregnated base material 2d include a woven fabric made of glass fiber and a non-woven fabric made of organic fiber, and these can be selectively employed.

  The synthetic resin film 3 provided on at least the inner peripheral surface 1b of the elastic material 1 has a property of being stretchable and capable of moving relative to at least the elastic material 1 or the cured lining material 2. ing. For this reason, it is possible to follow the elastic deformation when the elastic material 1 is restored from the expanded or compressed state. Such a synthetic resin film 3 may be made of a material that has a low frictional resistance with respect to at least the elastic material 1 or the lining material 2 and is allowed to move relative to the elastic material 1 or the lining material 2. is necessary.

  The material of the synthetic resin film 3 having elasticity and low frictional resistance is not particularly limited, and is selected from a film such as a polyethylene film, a polypropylene film, or a soft vinyl chloride film. It is possible.

  In particular, the synthetic resin film 3 is preferably a film having high waterproof properties. By providing such a synthetic resin film 3 on the outer peripheral surface 1a or the inner peripheral surface 1b of the elastic member 1, it is possible to reduce the risk of water leakage in the pipeline 50 after repair, and the load during construction Can be reduced.

  The thickness of the synthetic resin film 3 is not particularly limited as long as it can achieve high waterproofness or low frictional resistance. However, it is not preferable that the elastic material 1 is transported to the site or damaged during construction at the site. For this reason, the synthetic resin film 3 preferably has a thickness of about 0.2 mm to about 0.5 mm.

  The joining structure of the synthetic resin film 3 to the elastic material 1 is not particularly limited, and it is preferable to employ an optimum joining method corresponding to the material of the elastic material 1 or the material of the synthetic resin film 3. As such a joining method, for example, there are a method such as adhesion by adhesive, thermal welding, or a non-adhesion joining method by overlapping both end portions in the width direction, and these methods are appropriately selected and adopted. It is possible.

  Next, the first repair method according to the present invention will be described with reference to FIG. In the first repair method, after the elastic material 1 is drawn into the deteriorated pipe 50, the flexible resin lining material 2 is drawn into the drawn elastic material 1, and then the flexible lining material 2 is drawn. The lining material 2 is expanded and cured.

  First, as shown in FIG. 2A, the elastic material 1 having elasticity and flexibility is accommodated in one of the two manholes 52 in the deteriorated pipeline 50 in a folded state in the longitudinal direction. And the winch 12 is installed on the other side. Next, the winch 12 is passed through the manhole 52, the duct 50, and the manhole 52 to reach the container 11 a through the wire 13, and the elastic material 1 is connected to the wire 13.

  Thereafter, the wire 13 is wound up by the winch 12, thereby reducing the diameter of the elastic material 1 and drawing it into the pipe 50. After the elastic material 1 is drawn into the manhole 52 in the pipe line 50, both end portions of the drawn elastic material 1 are cut, and the end packer 14 is attached to this end portion. The end packer 14 includes a ring 14 a disposed on the inner periphery of the lining material 2, a plate 14 b that closes the end of the ring 14 a, a plurality of pipes 14 c provided through the plate 14 b, and an outer periphery of the lining material 2. And a fastening ring 14d for fastening the lining material 2 at a position facing the pipe 14a.

  In the end packer 14 configured as described above, the end packer 14 can be attached to the end of the lining material 2 and the wire 13 can be passed through the pipe 14c, and compressed air can be supplied through the other pipe 14c. Alternatively, it is possible to discharge the supplied compressed air to the atmosphere.

  In this embodiment, the elastic material 1 accommodated in the container 11a is formed in advance in a cylindrical shape and is formed of felt having a thickness of about 3 mm to about 10 mm in a free state, and is synthesized on the inner peripheral surface 1b. A resin film 3 is provided. The synthetic resin film 3 has a small coefficient of friction. Thus, by providing a layer with a small coefficient of friction in advance on the inner peripheral surface of the elastic material 1, work in the next process is easily performed. It becomes possible.

  Next, in one manhole, a container 11b is placed in which the impregnated curable resin is uncured and the flexible lining material 2 is folded in the longitudinal direction. It is not limited whether the curable resin impregnated in the lining material 2 is a photocurable resin or a thermosetting resin. In the present embodiment, in the lining material 2, the impregnated base material 2d made of glass fiber is impregnated with a photocurable resin.

  Next, as shown in FIG. 4B, the elastic member 1 drawn from the winch 12 into the manhole 52 and the conduit 50, and the manhole 52 through the wire 13 reach the container 11b, and the wire 13 is shrunk. The diameter lining material 2 is connected. Thereafter, the wire 13 is wound up by the winch 12 to draw the lining material 2 into the elastic material 1 drawn into the pipe 50.

  Since the synthetic resin film 3 is provided on the inner peripheral surface 1b of the elastic material 1 when the lining material 2 is drawn into the elastic material 1, the inner peripheral surface 1b of the elastic material 1 and the outer peripheral surface of the lining material 2 2a comes in contact through the low friction layer and can be pulled in with a small force. That is, even when the elastic material 1 is not in contact with the inner peripheral surface 51 a of the pipe 50 and is not self-supporting, the lining material 2 can be easily drawn into the pipe 50.

  After pulling the lining material 2 into the elastic material 1 as described above, both ends are cut off. Then, the light irradiation device 15 and the operation device 16 including the power source are installed in one manhole 52, and the air compressor 17 having the hose 18 connected is installed in the other manhole 52.

  Thereafter, as shown in FIG. 2C, the end packer 14 is attached to the end of the lining material 2 on the other manhole 52 side, and the wire 13 is inserted into the end packer 14 and the lining material 2 to It reaches the manhole 52 side. A light irradiation device 15 is connected to the wire 13, the light irradiation device 15 is inserted into the lining material 2, and an end packer 14 is attached to an end portion on one manhole side. Further, the hose 18 is drawn into the other manhole 52 side and connected to the end packer 14.

  Thereafter, the air compressor 17 is driven to supply compressed air into the lining material 2 to expand the lining material 2. As the lining 2 expands, the elastic material 1 expands and is pressed by the lining material 2 against the inner peripheral surface 51a of each pipe 51 constituting the pipe 50 without forming a crease due to slack, and the outer peripheral surface 1a is 51 is in pressure contact with the inner peripheral surface 51a.

  The pressure of the compressed air supplied to the lining material 2 is set in the range of about 0.05 MPa to about 0.07 MPa. For this reason, the elastic member 1 maintains a state of being elastically deformed (compressed to about 1 mm to about 3 mm) in accordance with the force acting on the basis of the pressure, and the outer peripheral surface 1 a is formed on the inner peripheral surface 51 a of the tube 51. Hold the pressure contact state. At this time, if unevenness due to deterioration is formed on the inner peripheral surface 51 a of the tube 51, the unevenness along the unevenness is formed on the outer peripheral surface 1 a of the elastic material 1.

  In a state where the supply of compressed air to the lining material 2 is continued, the photo-curing resin impregnated in the lining material 2 is pulled by the winch 12 while irradiating the lining material 2 with light from the light irradiation device 15. Harden. Although heat is generated as the photocurable resin is cured, since the supply of compressed air from the air compressor 17 continues, fresh and low temperature air is always supplied into the lining material 2. The generated heat can be discharged from one manhole 52 side.

  The lining material 2 is cured as the photocurable resin is cured. And after hardening, when the temperature returns to room temperature, the diameter is slightly reduced (about 0.3 mm to about 2.0 mm depending on the tube diameter). For this reason, the elastic material 1 in a compressed state is restored in thickness by the reduced diameter of the lining material 2.

  After the lining material 2 is cured as described above, as shown in FIG. 4D, the bound portions at the ends corresponding to the respective manholes 52 of the cured lining material 2 are cut, and the inner wall surface of the manhole 52 is cut. Repair for the pipe 50 that has deteriorated due to water stoppage at the joint portion is completed.

  Next, the second repair method according to the present invention will be described. The second repair method uses a laminated lining material obtained by previously laminating the elastic material 1 and the lining material 2 when repairing the deteriorated pipeline 50.

  Prior to describing the second repair method, the configuration of the laminated lining material will be described with reference to FIG. In the drawing, the same reference numerals are given to the same parts and the parts having the same functions as those of the above-described embodiments, and the description thereof is omitted.

  The laminated lining material 20 shown in FIG. 4A includes a lining material 2 configured by disposing an outer film 2b on an outer peripheral side of an impregnated base material 2d impregnated with a curable resin, and an inner film 2c on an inner peripheral side. The elastic material 1 provided with the synthetic resin film 3 having elasticity and flexibility and having the stretchability on the outer peripheral surface 1a is laminated. As the elastic material 1 and the lining material 2, those described above can be used as they are.

  Further, the laminated lining material 21 shown in FIG. 2B is a lining material 2 configured by disposing an outer film 2b on the outer peripheral side of the impregnated base material 2d impregnated with a curable resin and an inner film 2c on the inner peripheral side, It is constructed by laminating an elastic material 1 that is provided with a synthetic resin film 3 that has elasticity and flexibility, has elasticity on the inner peripheral surface 1b, and is movable relative to the elastic material 1 or the lining material 2. Has been.

  In the laminated lining materials 20 and 21, the procedure for laminating the lining material 2 and the elastic material 1 is not particularly limited, and the lining material 2 and the elastic material 1 may be laminated as a result.

  For example, as a procedure for forming the laminated lining material 20, the elastic material 1 in which the lining material 2 is formed into a cylindrical shape having a predetermined dimension and the synthetic resin film 3 is provided on the outer peripheral surface 1a is formed into a sheet shape. There is a method in which a lining material 2 that has been formed and previously impregnated with a curable resin is placed on a sheet-like elastic material 1 and then laminated so that the lining material 2 is wrapped by the elastic material 1 and the end portions are stitched. is there.

  When the laminated lining material 21 is formed, the elastic material 1 provided with the synthetic resin film 3 on the lining material 2 and the inner peripheral surface 1b is formed in a cylindrical shape having predetermined dimensions, and a curable resin is used. There is a method in which the impregnated lining material 2 is inserted into the elastic material 1 and laminated. In this case, since the synthetic resin film 3 is provided on the inner peripheral surface 1b of the residual material 1, it is possible to reduce friction when the lining material 2 is pulled in when the lining material 2 is inserted, and is small. It becomes possible to laminate easily with a load. In particular, when the outer film 2b is provided on the outer peripheral surface of the lining material 2, the outer film 2b is composed of a film having the same properties as the synthetic resin film 3, that is, a film having elasticity and low friction. Thus, the outer film 2b can be shared with the synthetic resin film 3.

  In the laminated lining materials 20 and 21 configured as described above, since the elastic material 1 and the lining material 2 are laminated, the conventional uncured lining material is inserted into a deteriorated pipeline and repaired. It is possible to realize the pipe repair structure of the present invention by the same operation as that.

  Here, the second repair method according to the present invention will be described. In this repair method, the laminated lining 20 configured as described above is used. However, even when the laminated lining material 21 is used, it can be repaired by the same procedure.

  First, as shown in FIG. 3A, one of the two manholes 52 in the deteriorated pipe 50 is impregnated with the curable resin impregnated in an uncured state and has flexibility and elasticity. A container 19 is installed in which a laminated lining material 20 in which a flexible elastic material 1 having flexibility is laminated is folded in the longitudinal direction. It is not limited whether the curable resin impregnated in the lining material 2 constituting the laminated lining material 20 is a photocurable resin or a thermosetting resin. In the present embodiment, in the lining material 2, the impregnated base material 2d made of glass fiber is impregnated with a photocurable resin.

  A winch 12 is installed in the other manhole 52, and the manhole 52, the conduit 50, and the manhole 52 are passed through the wire 13 from the winch 12 to reach the container 19, and the laminated lining material 20 is reduced in diameter and connected to the wire 13. To do. Thereafter, the laminated lining material 20 is drawn into the pipe 50 by winding the wire 13 with the winch 12.

  After the laminated lining material 20 is drawn between the manholes 52 in the conduit 50 as described above, both end portions are cut, and the end packer 14 is attached to the other manhole side end. Then, the light irradiation device 15 and the operation device 16 including the power source are installed in one manhole 52, and the air compressor 17 having the hose 18 connected is installed in the other manhole 52.

  Thereafter, as shown in FIG. 5B, the light irradiation device 15 is connected to the wire 13 that has passed through the end packer 14 attached to the end of the lining material 2 constituting the laminated lining material 20, The light irradiation device 15 is inserted into the laminated lining material 20 and the end packer 14 is attached to the end portion on one manhole side. Further, the hose 18 drawn from the other manhole 52 side is connected to the end packer 14.

  Thereafter, the air compressor 17 is driven to supply compressed air into the lining material 2 constituting the laminated lining material 20 to expand the laminated lining material 20. As the laminated lining 20 expands, the elastic member 1 comes into pressure contact with the inner peripheral surface 51 a of each pipe 51 constituting the pipe 50.

  The pressure of the compressed air supplied to the lining material 2 constituting the laminated lining material 20 is set in the range of about 0.05 MPa to about 0.07 MPa. For this reason, the elastic member 1 maintains a state of being elastically deformed (compressed to about 1 mm to about 3 mm) in accordance with the force acting on the basis of the pressure, and the outer peripheral surface 1 a is formed on the inner peripheral surface 51 a of the tube 51. Hold the pressure contact state. At this time, if unevenness due to deterioration is formed on the inner peripheral surface 51 a of the tube 51, the unevenness along the unevenness is formed on the outer peripheral surface 1 a of the elastic material 1.

  The lining material 2 is impregnated by being pulled by the winch 12 while irradiating light to the lining material 2 from the light irradiation device 15 while supplying compressed air to the lining material 2 constituting the laminated lining material 20. The cured photocurable resin is cured. Although heat is generated as the photocurable resin is cured, since the supply of compressed air from the air compressor 17 continues, fresh and low temperature air is always supplied into the lining material 2. The generated heat can be discharged from one manhole 52 side.

  The lining material 2 is cured as the photocurable resin is cured. And after hardening, when the temperature returns to room temperature, the diameter is slightly reduced (about 0.3 mm to about 2.0 mm depending on the tube diameter). For this reason, the elastic material 1 in a compressed state is restored in thickness by the reduced diameter of the lining material 2.

  After the lining material 2 constituting the laminated lining material 20 is cured as described above, as shown in FIG. 5C, the bound portions at the ends corresponding to the respective manholes 52 of the cured laminated lining material 20 are formed. The pipe 50 that has been deteriorated by cutting and water-stopping the joint portion with the inner wall surface of the manhole 52 is completed.

  In the first and second repair methods described above, an example in which the elastic material 1, the lining material 2, and the laminated lining materials 20 and 21 are drawn into the pipe 50 or the elastic material 1 by the pull-in method, respectively. did. However, when the elastic material 1, the lining material 2, and the laminated lining materials 20 and 21 are drawn into the pipe 50 or the elastic material 1, it is natural that an inversion method may be adopted. Further, both the pulling method and the reversing method are generally performed, and it is not a special method.

  The repair structure of a deteriorated pipeline according to the present invention, the repair method is a pipeline represented by a pipeline for sewerage, and the pipeline has a deteriorated inner peripheral surface or a reduced strength due to long-term use. It is advantageous to use for repair. Further, the laminated lining material according to the present invention is advantageous when used in carrying out the repair method.

DESCRIPTION OF SYMBOLS 1 Elastic material 1a Outer peripheral surface 1b Inner peripheral surface 2 Lining material 2a Outer peripheral surface 2b Outer film 2c Inner film 2d Impregnation base material 3 Synthetic resin film 11a, 11b, 19 Container 12 Winch 13 Wire 14 End packer 14a Ring 14b Plate 14c Pipe 14d Clamping ring 15 Light irradiation device 16 Operating device 17 Air compressor 18 Hose 20, 21 Laminated lining material 50 Pipe line 51 Pipe 51a Inner peripheral surface 51b Cylindrical part 51c Taper part 51d Expanded part 52 Manhole 53 Connecting part 54 Gap

Claims (7)

A pipeline repair structure in which a lining resin is impregnated inside a deteriorated pipeline and a flexible lining material is disposed, the lining material is expanded and the curable resin is cured, and repaired.
Between the inner peripheral surface of the deteriorated pipeline and the outer peripheral surface of the cured lining material, an elastic material made of elastic nonwoven fabric or foam is elastically deformed ,
A pipe repair structure , wherein a synthetic resin film is disposed between the elastic material and the cured lining material . 2. The tube according to claim 1, wherein the synthetic resin film has elasticity and can allow relative movement between at least an elastic material or a cured lining material. Road repair structure.   The elastic material is formed in a cylindrical shape, and when the force in the diametric direction is not applied, the elastic material is formed in a size that does not exceed the inner diameter of the pipeline whose outer diameter has deteriorated, and the force that acts in the diametrical direction. The pipe repair according to claim 1 or 2, characterized in that it is configured to be elastically deformed by being constrained by an inner peripheral surface of a deteriorated pipe and expanding in accordance with the diameter. Construction. A repair method for repairing a deteriorated pipeline by arranging an elastic material made of a nonwoven fabric or foam having elasticity between the inner peripheral surface of the deteriorated pipeline and the cured lining material,
Elastic material made of non-woven fabric or foam having elasticity and flexibility, or lining made of non-woven fabric or foam having elasticity and flexibility, and at least cured The elastic material provided with a synthetic resin film having a stretchability on the surface facing the material and allowing relative movement between at least the elastic material or the cured lining material is in a reduced diameter state. Pull inside the deteriorated pipeline,
Then, an uncured lining material impregnated with a curable resin and having flexibility is drawn into the elastic material drawn into the pipe line,
Next, the uncured lining material is expanded and the elastic material outside the uncured lining material is pressed against the inner peripheral surface of the conduit to be elastically deformed,
Next, the curable resin impregnated in the lining material is cured while the uncured lining material is expanded and the elastic material is pressed against the inner peripheral surface of the pipe line to be elastically deformed. This is a repair method for pipelines. A repair method for repairing a deteriorated pipeline by arranging an elastic material made of a nonwoven fabric or foam having elasticity between the inner peripheral surface of the deteriorated pipeline and the cured lining material,
Elastic material made of a nonwoven fabric or foam having elasticity and flexibility, or a nonwoven fabric or foam having elasticity and flexibility, and at least cured. Cured inside the elastic material provided with a synthetic resin film that has elasticity on the surface facing the lining material and at least allows relative movement between the elastic material and the cured lining material Laminating an uncured lining material impregnated with a functional resin and having flexibility,
Pulling the laminated elastic material and the uncured lining material into the deteriorated pipe line in a reduced diameter state,
Next, the uncured lining material is expanded and the elastic material outside the uncured lining material is pressed against the inner peripheral surface of the conduit to be elastically deformed,
Next, the curable resin impregnated in the lining material is cured while the uncured lining material is expanded and the elastic material is pressed against the inner peripheral surface of the pipe line to be elastically deformed. This is a repair method for pipelines. A laminated lining material that is arranged inside a deteriorated pipeline and has flexibility for repairing the deteriorated pipeline,
An impregnated layer impregnated with a curable resin, and an elastic material made of a nonwoven fabric or foam having elasticity provided on a surface facing the inner peripheral surface of the deteriorated pipe line in the impregnated layer ,
A laminated lining material, wherein a synthetic resin film is provided on at least a surface of the elastic material facing the impregnation layer . The synthetic resin film, according to claim 6, characterized in that it is capable of permitting relative movement between the between the stretchability has and at least the elastic material or the cured impregnating layer Laminated lining material.

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