JP5733903B2 - Partial repair structure for pipes for sewerage - Google Patents

Description

The present invention relates to a partial repair structure of the pipe for sewer for displacement seam of the tube with each other to constitute a conduit for sewerage or to repair cracks formed in the tube partially.

  In the case of sewer pipes, due to an earthquake, ground subsidence, etc., there may be a gap between the embedded pipes including a dropout or a crack in the pipes. When the sewer pipes are displaced or cracked, there is a risk that groundwater or earth and sand may penetrate into the sewer pipes or the roots of trees may enter through these parts. And in the pipe for sewage in which the groundwater infiltrated, the problem that an excessive burden will be placed on the sewage treatment equipment provided in the downstream side arises.

  For this reason, the inner peripheral surface of the sewer pipe is regularly observed, and whether or not the target sewer pipe should be repaired based on the observation result is examined. For example, when the inner peripheral surface of the pipe constituting the pipe for sewerage is peeled over almost the entire length or cracks are formed, the repair is performed with the length between adjacent manholes as the repair unit. It takes place over the entire length of the repair unit. However, when the parts to be repaired are limited to several joints or cracks, partial repair is performed to repair only the target part.

  When partially repairing a sewer pipe, first, a flexible sleeve impregnated with a curable resin and having a length that can reliably cover a portion to be repaired is used for a sewer. Press and adhere to the inner peripheral surface of the part to be repaired in the pipeline. Next, in a state where the sleeve is pressed and adhered to the inner peripheral surface of the portion to be repaired, the sleeve is heated and cured from the inner surface side, or the sleeve is irradiated with light from the inner surface side and cured. The portion to be repaired in the sewer pipe is partially repaired by the sleeve thus cured.

  By performing partial repairs as described above, it is possible to partially repair the gaps and cracks that occur at the joints of pipes in the sewerage system, and intrusion of groundwater from these parts Can be prevented. However, after partial repairs have been made to sewer pipes, earthquakes or ground subsidence will occur, and there will be further shifts in the joints between pipes that have already been partially repaired, and cracks will grow into larger cracks. There is. In this case, the hardened sleeve cannot follow the relative movement between the pipe and the growth of cracks and cracks, and the contact state with the inner peripheral surface of the sewer pipe is destroyed. There is a risk that a gap will be formed between the two.

  As described above, the conventional partial repair structure can sufficiently repair the displacement and cracking of the pipes that are currently occurring, but the displacement and crack growth of the pipes due to earthquakes and land subsidence that may occur in the future. There is a possibility that it cannot respond to.

The purpose of the present invention is that after partial repairs to the sewer pipes, earthquakes and land subsidence occurred, resulting in further displacement of pipes and growth of cracks at the seam pipe joints. result, even if a relative movement between the conduit and the repair material for sewer occurs, to provide a partial repair structure of the pipe for sewer can follow this movement is there.

  In order to solve the above problems, a partial repair structure for a sewer pipe according to the present invention is a repair structure that partially repairs a sewer pipe, and is to be repaired in a sewer pipe. A cylindrical elastic material having an outer diameter corresponding to the diameter of the inner peripheral surface of the sewer pipe to be repaired, which has non-permeability and elasticity, is disposed on the inner peripheral surface side of the cylindrical elastic material. A repair material that is impregnated with a curable resin and has flexibility in an uncured state and has an outer diameter corresponding to the diameter of the inner peripheral surface of the pipe for sewer to be repaired is the longitudinal direction of the cylindrical elastic material. It is disposed so as to cover the end portion, and is cured in a state where the cylindrical elastic material is compressed to the inner peripheral surface of the pipe for sewerage, so that the cylindrical elastic material is cured for the sewer by the repair material. The pipe for sewage is partially repaired while being pressed against and supported by the inner peripheral surface of the pipe.

  In the partial repair structure of the pipe for sewage, it is preferable that a contraction portion is formed in advance in the cylindrical elastic material in order to ensure stretchability.

  Further, in any of the above-mentioned partial repair structures for sewer pipes, a groove that is shallower than the thickness of the cylindrical elastic material is formed at the arrangement position of the cylindrical elastic material in the repair material. Preferably it is.

  In any one of the above-mentioned partial repair structures for a sewer pipe, the repair material is one piece facing a portion to be repaired in a sewer pipe, or a sewer pipe It is preferable to arrange a plurality of parts corresponding to the dimension in the length direction of the part to be repaired.

  In the present invention, a cylindrical elastic material having water permeability and stretchability is disposed at a site to be repaired in a sewer pipe (hereinafter simply referred to as “pipe”), and the inner peripheral surface side of the cylindrical elastic Since the repair material is hardened in a state where it is arranged so as to cover both ends of the cylindrical elastic material, the pipes that make up the seam are displaced or cracks grow during an earthquake or ground subsidence. Even if relative movement occurs between the pipe and the repair material as in the case, it is possible for the cylindrical elastic material to follow and maintain adhesion to the inner peripheral surface of the pipe. No gap is formed between the inner peripheral surface of the pipe line. Therefore, groundwater does not enter the inside of the pipe and high water stopping performance can be exhibited.

  In particular, the cylindrical elastic material is in close contact with the inner peripheral surface of the pipe against the relative movement between the pipe and the repair material that occurs when the pipes that make up the pipe are displaced or cracks grow. It is possible to follow by holding and elastically deforming. For this reason, the earthquake resistance of a pipe line can be improved and water stop performance can be maintained.

  By forming the contraction portion in the cylindrical elastic material, the following property of the cylindrical elastic material can be ensured.

  By forming a groove shallower than the thickness of the cylindrical elastic material in the repair material, it becomes possible to accommodate the cylindrical elastic material in this groove, and as the repair material is pressed against the inner peripheral surface of the pipe, Partial repair can be performed by reliably bringing the cylindrical elastic material into contact with the inner peripheral surface of the pipe.

  By arranging one or a plurality of repair materials so as to face the site to be repaired in the pipe line, a reasonable partial repair can be realized regardless of the length of the site to be partially repaired in the pipe line.

It is a figure explaining the structure which repaired the pipe line partially. It is a figure explaining the structure which repaired the pipe line partially. It is sectional drawing explaining the structure of a cylindrical elastic material. It is sectional drawing explaining the example of repair material. It is a figure explaining the construction method which repairs a pipe line partially.

  Hereinafter, the partial repair structure of the pipe line according to the present invention will be described. The partial repair structure of a pipe line according to the present invention needs to be repaired by causing a shift including a gap between pipes constituting a joint of the pipe line or causing a crack in a part of the pipe. However, when the pipe line still has sufficient durability, the pipe line is used to partially repair the joints and cracks.

  The pipeline targeted by the present invention is a pipeline for sewerage. In the present invention, the structure of the pipe constituting the pipe line is not particularly limited, and the structure of the joint portion between the pipes is not particularly limited.

  In this invention, the cylindrical elastic material arrange | positioned in the site | part which should be repaired of a pipe line is formed using the material which has a water-impermeable property and a stretching property. The material having non-water permeability and stretchability is not particularly limited as long as it can exhibit the above properties over a long period of time.

  The cylindrical elastic material needs to have a strength that can sufficiently resist the groundwater pressure. However, the thickness of the cylindrical elastic material is not limited, and it is preferable to appropriately set the thickness that exhibits strength that can resist groundwater pressure according to the inner diameter of the target pipe line. Since the cylindrical elastic material has a strength capable of resisting groundwater pressure, it does not break even if groundwater enters through gaps or cracks formed in the seams when the pipes are displaced.

  Styrene butadiene rubber (SBR), which is used as a packing material in a sewer pipe, is a material having such a non-water permeability and stretchability and a strength capable of resisting groundwater pressure. And if it is this SBR, it can be preferably used as a cylindrical elastic material. As the cylindrical elastic material, SBR having a thickness of about 1.5 mm to about 5 mm can be preferably used.

  The cylindrical elastic material of the present invention has an outer diameter corresponding to the diameter of the inner peripheral surface of the pipe. Here, the outer diameter corresponding to the inner peripheral surface of the pipe does not mean that the diameter of the inner peripheral surface of the pipe is equal to the outer diameter of the cylindrical elastic material, but is pressed against the pipe by a repair material described later. Then, the outer diameter is such that it is compressed and deformed with the inner peripheral surface of the pipe line in response to this pressing, and the pressure contact state with respect to the inner peripheral surface of the pipe line due to this compressive deformation can be maintained. Accordingly, the outer diameter of the cylindrical elastic material has a value equal to or larger than the diameter of the inner peripheral surface of the pipe.

  Further, the dimension in the longitudinal direction of the cylindrical elastic material (the length in the extending direction of the pipe line) is not particularly limited, and may be a dimension that can sufficiently cover and repair the portion to be repaired.

  The expansion / contraction performance of the cylindrical elastic material is not particularly limited. However, it is said that the permissible amount of permanent distortion during an earthquake is about 1.5%. And when a pipe line is for sewers, since the standard length of the fume pipe | tube which comprises this pipe line is 2.43 m, it is preferable that a cylindrical elastic material has an expansion-contraction performance of about 40 mm. By causing the cylindrical elastic material to exhibit the expansion and contraction performance as described above, the pipes that have undergone partial repairs undergo further displacement between pipes during the earthquake, and cracks grow and cause relative movement between the pipes. Even so, it becomes possible to follow this movement, and it is possible to demonstrate high seismic performance.

  In particular, in order to ensure the stretchability of the cylindrical elastic material, it is preferable to provide a contraction portion over the entire circumference at a predetermined position in the longitudinal direction of the cylindrical elastic material. The configuration of the contraction is not particularly limited. When the pipes at the joint move, or when cracks grow and cracks occur around the entire circumference of the pipe, the pipes on both sides of the crack move. In such a case, what is necessary is just to be able to follow the movement of the tubes.

  The cylindrical elastic material is supported in a state where it is pressed to the inner peripheral surface side of the pipe line by the repair material disposed on the inner peripheral surface side and cured. For this reason, it is preferable that the cylindrical elastic material is firmly integrated with the repair material by means such as adhesion. Accordingly, the surface of the cylindrical elastic material that contacts the repair material is preferably configured as a surface having moderate irregularities, and particularly preferably a surface on which grooves or protrusions are formed.

  In the present invention, the repair material is impregnated with a curable resin, has flexibility in an uncured state, and has an outer diameter corresponding to the diameter of the inner peripheral surface of the pipeline to be repaired when cured. That is, the repair material is formed in a cylindrical shape having an outer diameter corresponding to the diameter of the inner peripheral surface of the pipe line when cured. For this reason, it is not limited whether the repair material is in a cylindrical shape when the repair material is in an uncured state, and has a dimension that becomes an outer diameter corresponding to the diameter of the inner peripheral surface of the target pipe line in advance. It can be formed into a sleeve-like shape, and an uncured long sheet is wound in a spiral shape, and when it is cured, it is configured in a cylindrical shape in which the overlapping portions are integrated. Is also possible. In consideration of workability when performing partial repair, a high degree of freedom with respect to the diameter of the target pipe line, etc., it is preferable to use a long sheet having flexibility in an uncured state.

  The repair material is configured by impregnating a curable resin into a fiber base material made of woven fabric or non-woven fabric. The material of the fiber base material is not particularly limited, and fibers such as organic fibers including glass fibers and polyester fibers can be selectively employed. In particular, when a woven fabric made of glass fiber is employed as the fiber base material, it is preferable because high strength and cure shrinkage can be prevented. In addition, when organic fibers are used, the strength is lower than when glass fibers are used, but there is an advantage that costs are reduced.

  As the curable resin impregnated in the fiber base material constituting the repair material, a thermosetting resin in which a thermosetting agent or a photocuring agent is added to a resin such as an unsaturated polyester resin, a vinyl ester resin, or an epoxy resin, or There are photo-curing resins, and it is possible to constitute the repair material by selecting these curable resins alone or by laminating and impregnating both curable resins. In particular, repair materials impregnated with thermosetting resins or repair materials impregnated with photo-curable resins have unique characteristics during storage, transportation and construction, and are therefore suitable in consideration of these characteristics. Is preferably adopted.

  In the present invention, the thickness of the repair material is not limited, and is preferably set as appropriate according to conditions such as the diameter of the target pipe line, the groundwater level of the ground, and the length of the repair portion. In particular, when a photocurable resin is selected as the curable resin and a repair material is configured by impregnating the photocurable resin alone into a fiber base material, light irradiated when the repair material is cured is transmitted. It is preferable that the thickness be such that it is possible.

  The repair material configured as described above is arranged so as to cover the end portion in the longitudinal direction of the cylindrical elastic material on the inner peripheral surface side of the cylindrical elastic material when partially repairing the pipe line. In this state, it is pressed to the inner peripheral surface side of the pipeline. For this reason, the repairing material is deformed along the cylindrical elastic material while the cylindrical elastic material is pressed and compressed against the inner peripheral surface of the pipe line, and the end portion exceeds the end portion of the cylindrical elastic material. Will contact the inner circumferential surface of the pipe. Then, when the repair material is cured in this state, the cylindrical elastic material is wrapped by the cured repair material including the both ends in the longitudinal direction to maintain the compressed state, and as a result, the cylindrical elastic material is The pressure contact state with respect to the inner peripheral surface of the pipe line is maintained.

  In particular, since both ends in the longitudinal direction of the cylindrical elastic material are respectively covered with the repair material, even if the contact state of the repair material with respect to the inner peripheral surface of the pipeline is destroyed by an earthquake or ground subsidence, the cylinder There is no change in the structure in which both end portions in the longitudinal direction of the elastic material are pressed against and supported by the inner peripheral surface of the pipe. For this reason, the cylindrical elastic material is in pressure contact with the inner peripheral surface of the pipe line at least at both ends in the longitudinal direction, and it is possible to maintain the initial water stop performance.

  In the present invention, the repair material covering the end portion in the longitudinal direction of the cylindrical elastic material is not limited to covering both ends of the cylindrical elastic material with one repair material, but the cylindrical shape. This includes covering both ends in the longitudinal direction of the elastic material with two independent repair materials.

  As described above, when the longitudinal end portion of the cylindrical elastic material is covered with two repair materials, the interval between the repair materials is not limited, and the two repair materials are substantially in contact with each other (cylindrical elastic material). It may be in a state where the material is not exposed) or may be in a state where a space is provided between the two repair materials (a state where the cylindrical elastic material is exposed from between the repair materials). Furthermore, you may arrange | position one or more independent repair materials between the two repair materials which cover the both ends of the longitudinal direction of a cylindrical elastic material. In any case, it is natural that the cylindrical elastic material needs to have sufficient strength against the groundwater pressure.

  Next, a first embodiment of the pipe partial repair structure will be described with reference to FIG. In the drawing, a crack B is formed in the pipe 10 constituting the pipe line A. A cylindrical elastic material 1 is disposed at a position corresponding to the crack B on the inner peripheral surface of the tube 10, and a cured repair material 2 is disposed on the inner peripheral surface side of the cylindrical elastic material 1. The cylindrical elastic member 1 is supported by the repaired material 2 while being pressed and compressed to the inner peripheral surface side of the tube 10.

  In the present embodiment, the repair material 2 has a longer dimension than the length (longitudinal dimension) of the cylindrical elastic material 1, and one repair is performed at both ends in the longitudinal direction of the cylindrical elastic material 1. Covered with material.

  For this reason, when the tubular elastic member 1 is kept in the pressure contact state, if a displacement due to the growth of the crack B occurs in the tube 10 constituting the conduit A, the displacement of the tube 10 causes the displacement of the tube 10. There may be a deviation between the inner peripheral surface of the material and the repair material 2 in contact with the inner peripheral surface. In this case, since the pressure contact state of the tubular elastic material 1 with respect to the inner peripheral surface of the tube 10 is maintained, the tubular elastic material 1 expands in response to the displacement generated in the tube 10, thereby the tubular elastic material. 1. Partial repair of the crack B by the repair material 2 can maintain the repaired state.

  Next, a second embodiment of the pipe partial repair structure will be described with reference to FIG. In the figure, a gap 11 is formed at the joint C between the pipes 10 constituting the pipe line A due to a slippage due to a disconnection or the like. For this reason, the cylindrical elastic member 1 having a length that can sufficiently cover the joint C in the longitudinal direction of the pipe A is disposed on the inner peripheral surface of the pipe A corresponding to the gap 11. Two repair materials 2 that are hardened are disposed at both ends in the longitudinal direction on the inner peripheral surface side of the cylindrical elastic material 1, and the cylindrical elastic material 1 is placed on the inner peripheral surface side of the tube 10 by the hardened repair material 2. It is pressed and compressed.

  The repair material 2 arranged to cover both ends in the longitudinal direction of the cylindrical elastic material 1 is configured as a repair material 2 independent of each other, and a gap 3 is formed between the repair materials 2. Yes. The dimension of the gap 3 should not be set uniquely, but is appropriately set according to conditions such as the length of the cylindrical elastic member 1 and the posture of the pipe line A. Accordingly, when two independent repair materials 2 are arranged so as to cover both ends of the cylindrical elastic material 1, the two repair materials 2 may be in contact with each other at the longitudinal ends, and are separated from each other. Thus, the gap 3 is formed, and the cylindrical elastic member 1 may be exposed in the gap 3.

  As described above, the gap 11 formed in the seam C in the pipe A is arranged on the inner peripheral surface side of the pipe A and on the inner peripheral surface side of the cylindrical elastic material 1. By covering the longitudinal ends of the cylindrical elastic material 1 with the two repair materials 2, the cylindrical elastic material 1 can be pressed against and supported by the inner peripheral surface side of the pipeline A.

  For this reason, when the cylindrical elastic member 1 is kept in the pressure contact state, when the gap 11 grows due to further displacement between the pipes 10 in the joint C of the pipe line A, they are connected in the longitudinal direction. Deviation may occur between the inner peripheral surface of the pipe 10 and the repair material 2 in contact with these inner peripheral surfaces. Even in this case, since the pressure contact state with respect to the inner peripheral surface of the tube 10 to which the cylindrical elastic material 1 is connected is maintained, the cylindrical elastic material 1 expands in response to the further deviation generated in the tube 10. Thus, the partial repair of the gap 11 at the joint C by the cylindrical elastic member 1 and the repair member 2 can maintain the repair state.

  In each of the above embodiments, the cylindrical elastic member 1 is held between the repair member 2 and the inner peripheral surface of the pipe 10 constituting the pipe A by the hardened repair member 2 and maintains a compressed state. doing. When the tube 10 is displaced due to further growth of the crack B and the growth of the gap 11 at the seam C, the tubular elastic member 1 is expanded in accordance with the displacement and follows, thereby partially repairing. Hold. For this reason, the cylindrical elastic material 1 is comprised so that sufficient stretchability can be ensured.

  The stretchability of the cylindrical elastic member 1 includes the stretchability of the material itself and the stretchability of the special cross-sectional shape. In particular, in this embodiment, the expansion and contraction performance of the material itself can be sufficiently exhibited by appropriately setting the thickness of the cylindrical elastic member 1 in the range of 1.5 mm to 5 mm.

  Moreover, when exhibiting expansion-contraction performance by making the cylindrical elastic material 1 into a special cross-sectional shape, for example, as shown in FIG. 3A, the longitudinal direction of the cylindrical elastic material 1 (extending direction of the pipe line A) A large wave-shaped bent portion 1a is formed in the center, and sufficient bending performance can be exhibited by the bent portion 1a.

  Further, as shown in FIG. 5B, a small wave-like bent portion 1b is formed at the approximate center in the longitudinal direction of the cylindrical elastic member 1, and sufficient bending performance can be exhibited by the bent portion 1b. is there.

  Furthermore, as shown in FIG. 3C, it is also possible to form a glasses-like bridge 1c at the approximate center in the longitudinal direction of the cylindrical elastic member 1, and to exhibit sufficient expansion / contraction performance by this bridge 1c.

  Appropriate irregularities, grooves, or protrusions are formed on the surface (the inner peripheral surface, the lower surface in the figure) of the cylindrical elastic member 1 configured as described above that faces the repair material 2. Is preferred. When the repair material 2 arranged on the inner peripheral surface side is expanded by forming such irregularities and grooves, the flexible repair material 2 enters and engages with the irregularities and grooves to repair. As the material 2 is cured, it is possible to achieve a strong integration.

  When the cylindrical elastic member 1 is pressed against the inner peripheral surface of the pipe A and compressed by the repair member 2 arranged on the inner peripheral surface side of the cylindrical elastic member 1, the cylindrical elastic member 1 and the repair member 2 are repaired. If the position of the material 2 shifts, there is a possibility that the cylindrical elastic material 1 cannot be stably pressed and supported by the repair material 2. For this reason, as shown in FIG. 4, it is preferable to form a groove 2 a having a dimension smaller than the thickness of the cylindrical elastic material 1 in the approximate center of the repair material 2. By forming such a groove 2a, when the pipe A is partially repaired, when the cylindrical elastic member 1 is pressed against the inner peripheral surface of the pipe A by the repair material 2, the positions of both are shifted. This makes it possible to achieve stable support.

Next, a repair method for realizing the partial repair structure of the pipe line according to the above embodiment will be described with reference to FIG. In this repair method , it is assumed that a crack B is generated in the pipe 10 constituting the pipe line A. That is, an exploration robot is introduced in the pipe A in advance to carry out an internal exploration, and the crack B in the pipe A is recognized from the search result, and the distance from the manhole D to the crack B is recognized. deep.

  First, as shown in FIG. 5 (a), a cylindrical inflatable member (balloon) 15 that is previously formed in a manhole D by, for example, rubber and sealed at both ends is installed. The expansion member 15 is provided with rollers 16 at the front and rear, and can be moved to a desired position in the pipe A by connecting the rope 17 to the frame to which the roller 16 is attached and pulling. It is configured as follows.

  A hose 18 extended from an air compressor installed on the ground is connected to the expansion member 15, and the expansion member 15 can be expanded by supplying compressed air through the hose 18. Further, as shown in FIG. 3C, the light irradiation device 20 is disposed inside the expansion member 15, and the power cable 19 is connected to the light irradiation device 20.

In this repair method , since a material impregnated with a photocurable resin is used as the repair material 2, the light irradiation device 20 is disposed inside the expansion member 15, but the repair material 2 is a thermosetting resin. In the expansion member 15, it is necessary to raise the temperature of the expansion member 15 to about 60 ° C. to about 80 ° C. In this case, a heater is disposed inside the expansion member 15 or a boiler is installed on the ground. The generated steam can be introduced into the expansion member 15.

The repair material 2 is attached to the outer peripheral surface of the expansion member 15 configured as described above. In this repair method , the repair material 2 is configured in a sheet shape in which a long fiber base material is impregnated with a photocurable resin. For this reason, the sheet-shaped repair material 2 is wound around the outer peripheral surface of the expansion member 15 in a spiral shape so that the outer diameter is a dimension corresponding to the diameter of the inner peripheral surface of the pipe A. At this time, the overlapping portion of the repair material 2 that is overlapped by being wound around the expansion member 15 may be sewn and integrated, or may be left as it is.

  When the repair material 2 is wound around the expansion member 15, for example, compressed air is supplied to the expansion member 15 to expand the expansion member 15 to an extent that is approximately equal to or slightly larger than the inner diameter of the pipe A. It is possible to wrap the collecting material 2 around the surface.

  In the case where the repair material 2 is formed in a sleeve shape having an outer diameter corresponding to the diameter of the inner peripheral surface of the pipe A, by inserting the expansion member 15 through the inner peripheral side of the repair material 2, The repair material 2 can be attached to the expansion member 15.

  After the repair material 2 is wound around the outer peripheral surface of the expansion member 15, the cylindrical elastic material 1 is attached to the wound repair material 2. In this case, the tubular elastic member 1 can be attached to the repair member 2 by inserting the expansion member 15 in which the repair member 2 is wound around the inner peripheral side of the tubular elastic member 1.

  Next, as shown in FIG. 2B, after the repair material 2 and the cylindrical elastic material 1 are attached to the expansion member 15 as described above, the expansion member 15 is pulled by the rope 17 and repaired. The cylindrical elastic material 1 is stopped at a position facing the crack B.

  Next, as shown in FIG. 3C, compressed air is supplied to the elastic member 15 through the hose 18 to expand the expansion member 17. As the expansion member 15 expands, the cylindrical elastic material 1 and the repair material 2 are pressed against the inner peripheral surface of the pipe A, and the cylindrical elastic material 1 is sandwiched between the inner peripheral surface of the pipe A and the repair material 1. Compressed. The repair material 2 is deformed along the cylindrical elastic material 1, covers the end portion in the longitudinal direction of the cylindrical elastic material 1, and comes into contact with the inner peripheral surface of the pipe A.

  By maintaining the pressure of the compressed air supplied from the hose 18 at a preset value, conditions such as the pressure contact force on the inner peripheral surface of the pipe A of the cylindrical elastic material 1 by the repair material 2 and the compression rate are set. In this state, the light irradiation device 20 disposed inside the expansion member 15 is operated to irradiate the repair material 2 with light. The photocurable resin impregnated in the repair material 2 is cured with light irradiation from the light irradiation device 20, and the pressure contact state of the tubular elastic material 1 by the repair material 2 with respect to the inner peripheral surface of the pipe A is changed. It can be held and supported.

  After the irradiation of the repair material 2 is completed and the repair material 2 is sufficiently cured, the compressed air inside the expansion member 15 is excluded to the outside through the hose 18 as shown in FIG. To do. With this exclusion, the expansion member 15 contracts and returns to the initial state. Thereafter, the expansion member 15 is pulled by the rope 17 and moved to the adjacent manhole.

  By performing a series of operations as described above, it is possible to partially repair the crack B generated in the pipe A and the gap 11 generated between the fittings 10 in the joint C.

Partial repair structure of the conduit according to the present invention is not limited to the conduit for sewerage, it can be utilized in the laid pipeline generally ground.

A Pipe line B Crack C Seam D Manhole 1 Tubular elastic material 1a, 1b Bending part 1c Bridge 2 Repair material 2a Groove 3 Gap 10 Tube 11 Gap 15 Expansion member 16 Roller 17 Rope 18 Hose 19 Power cable 20 Light irradiation device

Claims (4)

A repair structure that partially repairs the pipeline for sewerage,
A cylindrical elastic material having an outer diameter corresponding to the diameter of the inner peripheral surface of the sewer pipe to be repaired is disposed at the site to be repaired of the sewer pipe,
The cylindrical elastic member is impregnated with a curable resin on the inner peripheral surface side and is flexible in an uncured state and has an outer diameter corresponding to the diameter of the inner peripheral surface of the pipe for sewer to be repaired. The material is disposed so as to cover the end portion in the longitudinal direction of the cylindrical elastic material, and is cured in a state where the cylindrical elastic material is compressed to the inner peripheral surface of the pipe for sewerage,
The tubular elastic material is pressed against and supported by the inner peripheral surface of the sewer pipe by the cured repair material, and the sewer pipe is partially repaired. Partial repair structure for pipes.   The partial repair structure for a pipe for sewage according to claim 1, wherein a contraction portion is formed in advance in the cylindrical elastic material in order to ensure stretchability.   The pipe for a sewer system according to claim 1 or 2, wherein a groove shallower than the thickness of the cylindrical elastic material is formed at an arrangement position of the cylindrical elastic material in the repair material. Partial repair structure.   One repair material is provided opposite to the portion to be repaired in the sewer pipe or a plurality of repair materials corresponding to the length dimension of the portion to be repaired in the sewer pipe. The partial repair structure of a pipe for sewage according to any one of claims 1 to 3, wherein the partial repair structure is arranged.

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