JP5842303B2 - Pipe inner peripheral side structure and pipe inner peripheral surface lining method - Google Patents

Description

  The present invention relates to an inner circumference of a pipe line which is lined with a backing material made of a thermoplastic resin or a backing material impregnated with a thermosetting resin or a photocurable resin, on the inner peripheral surface of an extending pipeline embedded in the ground. The present invention relates to a side structure and a method for lining a pipe inner peripheral surface.

  2. Description of the Related Art Conventionally, there are pipes buried in the ground such as a sewage pipe through which sewage flows and an underground cable pipe in which a power cable is accommodated. This pipe may be cracked or the joint portion may be separated to form a gap due to an earthquake or aging, or the joint portion may be displaced to cause a step. Even if the pipe is not aging, a gap or a step may be formed at the joint when a pipe is newly laid. If cracks, gaps or steps are present in the pipeline, sewage or the like in the pipeline may leak out, and rainwater or earth and sand may enter the pipeline.

  As a technique for repairing a pipe line in which cracks or gaps exist, a technique has been proposed in which a backing material impregnated with a thermosetting resin is pressed against the inner peripheral surface of the pipe line (for example, Patent Document 1).

  In addition, a technology for drawing an optical fiber into a pipe along with a backing material, placing the optical fiber between the backing material outer peripheral surface and the pipe inner peripheral surface, and measuring the temperature of the backing material using the optical fiber, and the backing A technique for detecting deformation generated in a material using an optical fiber has been proposed (for example, Patent Document 2).

Japanese Patent Laid-Open No. 2002-1818 JP 2010-38829 A

  However, the optical fiber has much smaller allowable tensile load and allowable bending stress than the backing material and the pipe line. For this reason, when the optical fiber is drawn into the pipe, a tensile load may be generated on the optical fiber due to friction generated between the pipe and the optical fiber, and the optical fiber may be disconnected. Moreover, the optical fiber may be worn by this friction.

  Furthermore, the edge of the inner peripheral surface of the pipe line in which the gap portion or the step portion is generated may be a corner portion. When the backing material is pressed against the inner peripheral surface of the pipe, the optical fiber may be pressed against a corner portion present in a gap portion or a step portion of the pipe and the optical fiber may be disconnected.

  In view of the above circumstances, an object of the present invention is to provide a pipe inner peripheral side structure and a pipe inner peripheral surface lining method capable of reducing damage such as wear and disconnection of an optical fiber.

The pipe inner peripheral structure of the present invention that solves the above-mentioned object is a backing made of a backing material or a thermoplastic resin impregnated with a thermosetting resin on the inner peripheral surface of an extending pipe buried in the ground. In the pipe inner periphery side structure lined with material,
An optical fiber for temperature measurement that extends in the extending direction of the pipe line between the backing material and the bottom of the inner peripheral surface and whose outer periphery is covered with a coating material, and the optical fiber and the inner peripheral surface A protective member extending in the extending direction of the pipe line between,
The protective member is a sheet-like member having a thickness of 1 mm or less .

  According to the pipe inner peripheral structure of the present invention, since the protective member is present between the optical fiber and the pipe, the wear and tensile load of the optical fiber due to the friction between the optical fiber and the pipe can be reduced. Can do. Moreover, even if a corner exists in the gap portion or step portion of the pipe, the optical fiber is difficult to be disconnected because the protective member is provided between the corner and the optical fiber.

  Here, the optical fiber may be for temperature measurement, or may be for deformation measurement of the backing material.

  The backing material may be impregnated with a thermosetting resin, or may be made of a thermoplastic resin. Further, the backing material may be impregnated with a photocurable resin.

  Since the protective member is in the form of a sheet, it is easy to create a pipe inner peripheral structure. That is, when the protective member is cylindrical, it takes time to insert the backing material and the optical fiber into the cylinder. This trouble is reduced by forming the protective member into a sheet shape.

  Here, the protective member may be a metal sheet.

  Further, the backing material backs a predetermined area of at least the lower half of the inner peripheral surface of the pipe line, and each of the optical fiber and the protection member is provided between the backing material and the predetermined area. It may be arranged in. More specifically, the backing material backs at least the bottom of the inner peripheral surface of the pipe line, and the optical fiber and the protection member are respectively disposed between the backing material and the bottom. It may be what was done.

  Further, the optical fiber may be in contact with the backing material.

Further, the pipe inner peripheral surface lining method according to the present invention is a cylinder made of a cylindrical backing material or a thermoplastic resin in which an inner peripheral surface of an extended pipe line embedded in the ground is impregnated with a thermosetting resin. In the method of backing the inner peripheral surface of the pipe lined with a lining material
An advancing step for advancing the tubular backing material into the pipeline;
A pressing step of pressing the outer peripheral surface of the cylindrical backing material that has advanced into the pipe line toward the inner peripheral surface;
In the advancement step, an optical fiber for temperature measurement whose outer periphery is covered with a coating material and a protective sheet having a thickness of 1 mm or less are advanced into the pipeline together with the cylindrical backing material, and the cylindrical backing material The step of disposing the optical fiber on the outer peripheral surface side of the cylindrical backing material between the outer peripheral surface and the bottom of the inner peripheral surface of the conduit and disposing the protective sheet on the inner peripheral surface side of the conduit It is characterized by being.

  According to the inner peripheral surface backing method of the present invention, a protective sheet is provided between the optical fiber and the pipe, and the optical fiber and the protective sheet are advanced together with the backing material into the pipe. It is possible to reduce the wear and tensile load of the optical fiber due to the friction. Moreover, even if a corner exists in the gap portion or step portion of the pipe, the optical fiber is difficult to be disconnected because the protective member is provided between the corner and the optical fiber.

  Here, the advance may be drawn in or sent out.

  The pressing step may be a step of pressing the outer peripheral surface of the cylindrical backing material toward the inner peripheral surface of the pipe line while applying heat to the thermosetting resin or thermoplastic resin.

Further, in the pipe inner peripheral surface lining method of the present invention, before carrying out the advancement step, the optical fiber, the protective sheet, and the cylindrical backing material that is folded in the longitudinal direction are separately provided on the ground side. prepared for the tip of the cylindrical backing member, after fixing the front end and the distal end of the protective sheet of the optical fiber, characterized that you implement the expansion process.

  By folding the cylindrical backing material in a zigzag manner, the cylindrical backing material before advancement can be accommodated in a compact manner.

  According to the pipe inner peripheral side structure and the pipe inner peripheral surface backing method of the present invention, since the protective member is provided between the optical fiber and the pipe, damage to the optical fiber can be suppressed.

It is the schematic showing the pipe inner peripheral side structure which is one embodiment of this invention formed in the inner peripheral surface of a pipe. It is sectional drawing which cut | disconnected the pipe inner peripheral structure and the pipe line by the AA line shown in FIG. It is the schematic showing a mode that the cylindrical backing material, the optical fiber, and the protection sheet were prepared in the vicinity of the entrance of a manhole. It is the schematic showing the process which advances a cylindrical backing material, an optical fiber, and a protection sheet to a pipe line. It is the schematic showing the process of pressing a cylindrical backing material on the inner peripheral surface of a pipe line. It is sectional drawing which cut | disconnected the pipe inner peripheral structure of the modification.

  Embodiments of the present invention will be described below with reference to the drawings.

  Fig.1 (a) is the schematic showing the pipe inner peripheral side structure which is one Embodiment of this invention formed in the inner peripheral surface of a pipe. FIG. 1B is an exaggerated view of the gap portion generated in the pipeline, and FIG. 1C is an exaggerated view of the step portion generated in the pipeline.

  A plurality of manholes 23 connecting the pipeline 20 and the ground surface are provided at predetermined intervals in the pipeline 20 such as a sewer pipe buried in the underground 21. Some of the pipe lines 20 have cracks 20a shown in FIG. Further, the pipe line 20 may have a gap portion 20b shown in FIG. 1 (b) and a step portion 20c shown in FIG. 1 (c). The gap portion 20b and the stepped portion 20c may be generated when the pipe line 20 is newly laid, or may be caused by an earthquake after laying. When the gap portion 20b and the step portion 20c are generated, the edge of the inner peripheral surface of the pipe line 20 becomes a corner portion 20d.

  For the purpose of repairing these pipe lines 20, the pipe inner peripheral side structure 10 composed of the cylindrical backing material 11, the optical fiber 12, and the protective sheet 13 is formed. The cylindrical backing material 11 in the present embodiment corresponds to an example of the backing material of the present invention. Further, the protective sheet 13 in the present embodiment corresponds to an example of the protective member of the present invention.

  The cylindrical backing material 11 backs the inner peripheral surface of the pipe line 20 over the entire length between adjacent manholes 23. Further, the optical fiber 12 and the protective sheet 13 also extend over the entire length between the adjacent manholes 23. The cylindrical backing material 11 is composed of a nonwoven fabric impregnated with a thermosetting resin, and an impermeable film provided on the inner and outer peripheral surfaces of the nonwoven fabric. An impermeable film is a film that does not transmit gas or liquid.

  FIG. 2 is a cross-sectional view of the pipe inner peripheral side structure taken along line AA shown in FIG. As shown in FIG. 2, the cylindrical backing material 11 is formed in a cylindrical shape substantially along the inner peripheral surface of the pipe line 20.

  The optical fiber 12 includes a core and a clad made of quartz glass, and a coating material made of a resin such as polyethylene covering the core and the clad. The optical fiber 12 is disposed between the bottom of the inner peripheral surface of the pipe line 20 and the cylindrical backing material 11. The optical fiber 12 is in contact with the cylindrical backing material 11 and extends in the extending direction of the pipe line 20 without contacting the pipe inner peripheral surface.

  The protective sheet 13 extends in the extending direction of the pipe line 20 between the inner peripheral surface of the pipe line 20 and the optical fiber 12. The protective sheet 13 covers an area of about 120 ° on the inner peripheral surface of the pipe line 20 with the bottom of the pipe line 20 as the center. This protective sheet 13 is a sheet-like member made of hard vinyl chloride. The thickness of the protective sheet 13 is preferably thinner in consideration of the flow ability of the pipeline 20 after lining, and is preferably at least 1 mm or less. In the present embodiment, the thickness of the protective sheet 13 is set to 0.4 mm in consideration of the rigidity. The protective sheet 13 may be a member having a low friction coefficient, a high hardness, a difficulty in extending, and a high rigidity, even if it is not a hard vinyl chloride sheet. Examples of such a member include a cloth, a thermoplastic resin sheet, a metal sheet, or a fiber-reinforced coating sheet. However, a rigid vinyl chloride sheet is preferable from the viewpoint of cost and availability.

  Next, a pipe inner peripheral surface lining method for lining the cylindrical backing material 11 on the inner peripheral surface of the pipe 20 will be described with reference to FIGS. 3 to 5. The pipe inner peripheral surface lining method described here has an advancing process and a pressing process. FIG. 3 is a schematic view showing a state in which the cylindrical backing material 11, the optical fiber 12, and the protective sheet 13 are prepared near the entrance of the manhole 23. FIG. 4 is a schematic diagram showing the advancement process, and FIG. 5 is a schematic diagram showing the pressing process, which will be described in detail later.

  As shown in FIG. 3, first, an optical fiber roll 12a in which an optical fiber 12 is wound in the vicinity of an entrance of one manhole 23 (hereinafter referred to as an insertion side manhole 231) connected to a line 20 to be lined, The protective sheet roll 13a around which the protective sheet 13 is wound and the cylindrical backing material 11 are transported. A winch 29 (see FIG. 4) is installed on the entrance of the other manhole 23 (hereinafter referred to as the drawing-in manhole 232) connected to the pipe line 20 to be lined. Further, a pulley 30 (see FIG. 4) is installed at a connection portion between the drawing-in manhole 232 and the pipe line 20. Subsequently, the leading end of the drawing wire 28 wound around the winch 29 via the pulley 30 is inserted into the drawing side manhole 232, and the drawing wire 28 is penetrated to the insertion side manhole 231.

  The cylindrical backing material 11 includes a hot water supply hose 34 (see FIG. 5), which will be described later, and is prepared in advance at a factory. Thereafter, the cylindrical backing material 11 is transported to the vicinity of the entrance of the insertion-side manhole 231 while being kept cold by the cold insulation vehicle 24 so as not to be cured by the outside air temperature. The tubular backing material 11 is placed in the inside of the above-described cold-insulated vehicle 24 in a state of being folded in the longitudinal direction until it is drawn into the insertion-side manhole 231 from transportation. By placing it in a zigzag manner, the cylindrical backing material 11 can be accommodated in a compact manner, and transportation with a cold car becomes easy.

  The optical fiber 12 is separated from the cylindrical backing material 11 and transported to the vicinity of the insertion side manhole 231. The reason why they are transported separately is that they cannot be folded in the longitudinal direction like the cylindrical backing material 11 at the bending radius allowed for the optical fiber 12. The protective sheet 13 is also separated from the cylindrical backing material 11 and the optical fiber 12 and transported to the vicinity of the insertion side manhole 231.

  Next, the tip of the optical fiber 12 is inserted into the cylindrical steel pipe 14, and the optical fiber 12 is fixed to the steel pipe 14. Thereafter, the steel pipe 14 is sandwiched between the tip of the protective sheet 13 and the tip of the cylindrical backing material 11 and bound by the binding wire 15. Hereinafter, the cylindrical backing material 11, the optical fiber 12, and the protective sheet 13 with the tips bound together are referred to as a lining material M. By binding, the tip of the protective sheet 13 is fixed to the tip of the cylindrical backing material 11, and the tip of the optical fiber 12 is also fixed to the cylindrical backing material 11 through the steel pipe 14. In addition, the steel pipe 14 is for protecting the front-end | tip of the optical fiber 12 from the clamping pressure by bundling. When the binding is completed, the leading end of the drawing wire 28 is tied to the leading end of the cylindrical backing material 11.

  Next, the advancing process will be described with reference to FIG. FIG. 4 is a schematic diagram showing an advancing process for advancing the lining material M into the pipeline 20. In the drawing-in process, the drawing-in wire 28 is wound up by the winch 29 installed on the inlet of the drawing-in manhole 232 and drawn into the pipe line 20 that lines the lining material M. At the time of this drawing, the protection sheet 13 is drawn along the bottom portion on the inner peripheral surface of the pipe line. The optical fiber 12 is also drawn along the bottom portion on the inner peripheral surface of the pipe line via the protective sheet 13.

  During drawing into the pipe line 20, only the tip of the optical fiber 12 is fixed to the cylindrical backing material 11 via the steel pipe 14. Since the portions other than the tip are not fixed, the cylindrical backing material 11 and the optical fiber 12 freely expand and contract without being constrained to each other in the extending direction. When the cylindrical backing material 11 is drawn into the duct 20, the cylindrical backing material 11 may extend in the extending direction. Even in this case, the cylindrical backing material 11 can freely expand and contract independently of the optical fiber 12, so that a tensile load due to the expansion and contraction of the cylindrical backing material 11 does not act on the optical fiber 12.

  When the leading end of the lining material M is drawn to the connecting portion of the line 20 to be lined with the drawing side manhole 232, the winch 29 is stopped to complete the drawing. When the pull-in is completed, the protective sheet 13 extends between the outer peripheral surface of the tubular backing material 11 and the inner peripheral surface of the pipe line 20 and extends in the longitudinal direction of the pipe line 20 at the lower portion of the pipe line 20. doing. The optical fiber 12 extends in the longitudinal direction of the pipe line 20 at the bottom of the pipe line 20 via the protective sheet 13. The rear end of the lining material M that has been retracted is located above the entrance of the insertion-side manhole 231. Next, the binding wire 15 and the drawing wire 28 are removed from the lining material M, and the steel pipe 14 is pulled out from the tip of the optical fiber 12.

  Next, the pressing process will be described with reference to FIG. FIG. 5 is a schematic diagram showing a pressing process of pressing the cylindrical backing material 11 against the inner peripheral surface of the pipe line 20. In the pressing step, hot water is supplied into the cylindrical backing material 11.

  First, as shown in FIG. 5, the rear end of the cylindrical backing material 11 is closed with a rear end side plug body 31. Further, fastening bands 32 are attached to both ends of the cylindrical backing material 11 so that gas and liquid do not leak from the cylindrical backing material 11. Thereafter, the support frame 33 is assembled just above the insertion-side manhole 231, and the rear end side plug body 31 is fixed to the support frame 33. Further, the end of the optical fiber 12 is connected to a temperature measuring device 351 that is provided in the boiler wheel 35 and measures the temperature of hot water. Then, after the operator determines the temperature measurement result of the optical fiber, the target heating temperature is input to a temperature controller (not shown), and the heating time is adjusted. In addition, about the temperature control of the heating medium after inputting target heating temperature, automatic control by feedback control is performed by the temperature sensor (not shown) installed in the temperature regulator and the circulation system.

  Subsequently, hot water is supplied from the boiler wheel 35 to the hot water supply hose 34 that is disposed in the cylindrical backing material 11 at the factory.

  The supplied hot water is discharged from a hose tip hole 34 a provided at the tip of the hot water supply hose 34. By supplying hot water to the inside, the diameter of the cylindrical backing material 11 is increased, and the optical fiber 12 and the protective sheet 13 outside the cylindrical backing material 11 are formed on the inner peripheral surface of the pipe line 20 together with the cylindrical backing material 11. Pressed.

  A distal end of a hot water recovery hose 37 is installed in the rear end side plug body 31. The hot water supplied from the hose tip hole 34 a is collected through the tip of the hot water collection hose 37. The arrows in FIG. 5 indicate the flow of hot water. Moreover, while the hot water supplied from the hose tip hole 34a is circulated to the hot water recovery hose 37, the tubular backing material 11 is deprived of heat and the temperature is lowered. The hot water whose temperature has been lowered is recovered by the hot water recovery hose 37 and then heated again by the boiler wheel 35 and supplied to the hot water supply hose 34. On the other hand, the cylindrical backing material 11 is gradually heated while being pressed against the pipe line 20 by absorbing the heat of the hot water. When the temperature of the cylindrical backing material 11 reaches a predetermined temperature, curing of the thermosetting resin existing in the cylindrical backing material 11 starts.

  It is desirable that this curing proceeds uniformly throughout the tubular backing material 11. However, the hot water supplied from the hose tip hole 34a has a characteristic that when the temperature is lowered, a density difference is generated and the hot water moves to a lower position in the cylindrical backing material.

  Moreover, since the outer peripheral surface of the cylindrical backing material 11 is farthest from the hot water, the heating by the hot water is delayed as compared with the inner peripheral surface, and the heating temperature itself is also lowered.

  Furthermore, if there is a crack or a gap in the pipe line 20, rainwater or the like enters from the outside and accumulates at the bottom of the cylindrical backing material 11, thereby hindering temperature rise at the bottom. For these reasons, the temperature of the outer peripheral surface near the bottom of the cylindrical backing material 11 tends to be particularly low, and the curing tends to be delayed.

  Therefore, in the present embodiment, the temperature of the cylindrical backing material 11 is measured using the optical fiber 12 as a measuring means when hot water is supplied. In this measurement, the temperature over the entire length in the longitudinal direction of the cylindrical backing material 11 is measured by using the optical fiber 12 extending in the entire length in the longitudinal direction of the cylindrical backing material 11 as a measuring means. According to the measured temperature, the temperature and supply time of the hot water supplied to the hot water supply hose 34 are adjusted.

  Further, since the optical fiber 12 is disposed in contact with the outer peripheral surface of the cylindrical backing material 11 at the bottom of the inner peripheral surface of the pipe line 20, the temperature of the lowest temperature portion of the cylindrical backing material 11 is measured. By measuring the temperature of the coldest part of the cylindrical backing material 11, the temperature and the supply time are adjusted using a temperature controller.

  When all the portions of the cylindrical backing material 11 are at a predetermined temperature or higher and the time necessary for curing has passed in this state, the entire cylindrical backing material 11 is cured and the backing by the cylindrical backing material 11 is completed. When the backing is completed, the fastening bands 32 at both ends of the cylindrical backing material 11 are removed, and the rear end side plug body 31 is removed from the cylindrical backing material 11. Next, the excess cylindrical backing material 11, the optical fiber 12, and the protective sheet 13 extending from the pipe line 20 are cut off. The state where the cutting is finished is a state in which the pipe inner peripheral structure 10 is formed in the pipe 20 as shown in FIGS. 1 and 2.

  After the pipe inner peripheral structure 10 is formed on the pipe 20, the state management of the cylindrical backing material 11 is performed using the optical fiber 12 as a measuring means. The state when the pipe inner peripheral structure 10 is formed on the pipe 20 is measured using the optical fiber 12 and the measurement result is recorded. By comparing the recorded measurement result with the measurement result after formation, it is possible to diagnose the deformed state after formation and grasp whether or not repair is necessary and the position where repair is necessary.

  According to the configuration of the present embodiment, since the protective sheet 13 is provided between the conduit 20 and the optical fiber 12, the optical fiber 12 contacts the conduit 20 when the optical fiber 12 is drawn into the conduit 20. It will not wear out. Further, a tensile load does not act on the optical fiber 12.

  Moreover, in this Embodiment, since the protective sheet 13 is provided between the pipe line 20 and the optical fiber 12, the corner | angular part 20d and the optical fiber 12 do not contact directly. Even if the optical fiber 12 is pressed against the inner peripheral surface of the pipe line 20 when the diameter of the cylindrical backing material 11 is increased, the corner portion 20d and the optical fiber 12 do not come into contact with each other, so that the optical fiber 12 may be disconnected by the corner portion 20d. Can be greatly reduced.

  In addition, even when a deformation such as a step occurs in the pipe line 20 after the pipe inner peripheral structure 10 is formed in the pipe line 20, the optical fiber 12 is not in contact with the corner portion 20 d and the optical fiber 12. It becomes difficult to break.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope described in the claims. For example, as shown in FIG. 6, it is conceivable to deform the pipe inner peripheral structure 10. FIG. 6 is a cross-sectional view of a modified pipe inner periphery side structure 10. In the pipe inner peripheral structure 10 of this modification, a metal guide sheet 40 is provided between the outer peripheral surface of the cylindrical backing material 11 and the optical fiber 12. The guide sheet 40 has a friction coefficient of a predetermined value or less. In this modification, first, the guide sheet 40, the optical fiber 12, and the protection sheet 13 are arranged in the pipe line 20. Thereafter, the tubular backing material 11 is drawn. By providing the guide sheet 40 with a low coefficient of friction, even when the optical fiber 12 is disposed in the pipe line 20 before the cylindrical backing material 11, the cylindrical backing material 11 is drawn into the pipe line 20. The abrasion of the optical fiber 12 and the generation of a tensile load due to the friction between the lining material 11 and the optical fiber 12 are suppressed. Further, the tensile load is not generated on the optical fiber 12 by the pulling of the cylindrical backing material 11. The protective sheet 13 may not be made of metal as long as it can efficiently transmit the temperature of the cylindrical backing material 11 to the optical fiber 12 and has a low friction coefficient.

  Moreover, in this Embodiment, although it was set as the example provided with only one optical fiber 12 in the pipe inner peripheral structure 10, you may provide two or more and may provide two or more protection sheets 13. . Further, the optical fiber 12 may be used for only one of temperature measurement and deformation detection. In addition, the optical fiber 12 is preferably disposed at the bottom of the inner peripheral surface of the pipe line 20 in order to measure the temperature of the low temperature portion, but may be located at other positions as long as it is the lower half of the inner peripheral surface of the pipe line 20. It may be arranged. Furthermore, if it is the objective which detects the deformation | transformation of the cylindrical backing material 11, you may arrange | position in any position of the circumferential direction in the internal peripheral surface of the pipe line 20. FIG. Moreover, although the example which uses the sheet-like protection sheet 13 was given in this Embodiment, cylindrical shape may be sufficient. However, in the case of a cylindrical shape, it takes time to store the cylindrical backing material 11 and the optical fiber 12 inside the cylindrical protective sheet 13. In the case of a sheet shape, the workability is good because it is only necessary to draw the protective sheet 13 together with the cylindrical backing material 11 and the optical fiber 12 into the conduit 20. In the case of a sheet shape, the length in the width direction of the protective sheet 13 may be a length covering the lower half of the inner peripheral surface of the pipe line 20, or a length over the entire inner circumference of the pipe line 20. There may be. Furthermore, the length in the width direction of the protection sheet 13 may be a length that wraps both ends in the width direction of the protection sheet 13 beyond the entire inner circumference of the pipe line 20. Alternatively, an optical fiber 12 may be disposed between the cylindrical backing material 11 and the protective sheet 13 and the end of the protective sheet 13 in the width direction may be bonded to the cylindrical backing material 11 at a factory. However, when bonded, the cylindrical backing material 11 cannot be folded in a zigzag manner, so that the cylindrical backing material cannot be accommodated in a compact manner, and a cold car having a large accommodation space is required for transportation. become. Further, the tubular backing material 11, the optical fiber 12, and the protective sheet 13 may be advanced to the pipeline 20 by being sent out from the insertion side manhole 231 side. Further, the resin impregnated in the cylindrical backing material 11 may be a photocurable resin, and the cylindrical backing material 11 itself may be made of a thermoplastic resin.

  In the case of a thermosetting resin or a thermoplastic resin, steam or hot air may be used as means for warming the resin. In the case of a photocurable resin, visible light or ultraviolet light may be used. Moreover, in this Embodiment, although the optical fiber 12 and the protection sheet 13 were prepared near the entrance of a manhole, you may prepare these in a manhole. Furthermore, what is supplied to the inside of the cylindrical backing material 11 in the pressing step is not limited to hot water, but may be mixed steam in which air and steam are mixed. These modifications can be combined as appropriate.

DESCRIPTION OF SYMBOLS 10 Pipe inner peripheral side structure 11 Cylindrical backing material 12 Optical fiber 13 Protection sheet 20 Pipe line 20a Crack 20b Gap part 20c Step part 20d Corner part

Claims (3)

In the pipe inner peripheral side structure, the inner peripheral surface of the extending pipe line buried in the ground is lined with a backing material impregnated with a thermosetting resin or a backing material made of a thermoplastic resin,
An optical fiber for temperature measurement that extends in the extending direction of the pipe line between the backing material and the bottom of the inner peripheral surface and whose outer periphery is covered with a coating material, and the optical fiber and the inner peripheral surface A protective member extending in the extending direction of the pipe line between,
The pipe inner peripheral structure, wherein the protective member is a sheet having a thickness of 1 mm or less .   In a pipe inner peripheral surface lining method in which the inner peripheral surface of an extended pipe line buried in the ground is lined with a cylindrical backing material impregnated with a thermosetting resin or a cylindrical backing material made of a thermoplastic resin ,
  An advancing step for advancing the tubular backing material into the pipeline;
  A pressing step of pressing the outer peripheral surface of the cylindrical backing material that has advanced into the pipe line toward the inner peripheral surface;
  In the advancement step, an optical fiber for temperature measurement whose outer periphery is covered with a coating material and a protective sheet having a thickness of 1 mm or less are advanced into the pipeline together with the cylindrical backing material, and the cylindrical backing material The step of disposing the optical fiber on the outer peripheral surface side of the cylindrical backing material between the outer peripheral surface and the bottom of the inner peripheral surface of the conduit and disposing the protective sheet on the inner peripheral surface side of the conduit A method for lining the inner peripheral surface of a pipe, characterized by being Before carrying out the advancement step, the optical fiber, the protective sheet, and a cylindrical backing material that is folded in the longitudinal direction are separately prepared on the ground side, and the light is applied to the tip of the cylindrical backing material. The pipe inner peripheral surface lining method according to claim 2, wherein the advancing step is performed after fixing the tip of the fiber and the tip of the protective sheet .

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