WO2013180170A1 - 更生管引込み方法及び更生された管路 - Google Patents
更生管引込み方法及び更生された管路 Download PDFInfo
- Publication number
- WO2013180170A1 WO2013180170A1 PCT/JP2013/064894 JP2013064894W WO2013180170A1 WO 2013180170 A1 WO2013180170 A1 WO 2013180170A1 JP 2013064894 W JP2013064894 W JP 2013064894W WO 2013180170 A1 WO2013180170 A1 WO 2013180170A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- jig
- rehabilitation pipe
- rehabilitation
- manhole
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
- E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining
Definitions
- the present invention relates to a rehabilitation pipe drawing method for rehabilitating an existing pipe by drawing a new resin rehabilitation pipe into the pipe.
- Patent Documents 1 and 2 disclose a method and an apparatus for solving such a problem.
- the drainage pipe repair device described in Patent Document 1 shown in FIG. 17 forms a new drainage pipe made of resin inside an aging sewer pipe. According to the drainage pipe repair device, it is possible to easily form a pipe body in an existing pipe without requiring a construction facility for excavating earth and sand.
- the drainage pipe repairing apparatus is configured such that a flexible resin pipe 50 (generally referred to as a “corrugated pipe” or “corrugated pipe”) is fed from a rotating drum 51 and passed through a left manhole 52 to an existing sewage pipe 53. Is inserted from one of the two, and pulled in from the right manhole 52 by the winch 54.
- a pull-in cap 55 is attached to the tip of the resin tube 50, and a wire 56 is connected to the cap 55.
- a rehabilitation pipe made of a thermoplastic material having an outer diameter smaller than the inner diameter of the sewer pipe is drawn into the sewage pipe to be rehabilitated through a manhole, and the rehabilitation pipe has a temperature of 100 ° C. or higher.
- the hot air is fed and the hot air is appropriately sealed in the rehabilitation pipe so that the rehabilitation pipe is heated and expanded in diameter, and is brought into close contact with the inner wall of the sewage pipe.
- the rehabilitation pipe used in this pipe rehabilitation method is formed into a flattened shape in the radial direction when drawn into the sewer pipe, and after drawing into the sewer pipe, the shape is deformed into a cylindrical shape by the hot air. And the diameter is forcibly expanded.
- the inner wall of the sewage pipe can be lined by bringing the rehabilitation pipe into close contact with the inner wall of the sewage pipe.
- Sewage pipes buried in the soil may be displaced or bent at the connection part over the years.
- a rehabilitation pipe is inserted into a sewer pipe with such deviation or bending, even if the rehabilitation pipe has flexibility, the degree of deviation or bending is large, or an obstacle is caught in the connection part.
- the conventional method and apparatus Since it is necessary to avoid the above-mentioned problem in order to perform a safe and efficient pull-in operation over the entire length of the sewer pipe, the conventional method and apparatus have a rehabilitation of an outer diameter that is considerably smaller than the inner diameter of the sewer pipe. You must use a tube.
- the sewage pipe has a problem that the diameter becomes considerably small and the drainage capacity is greatly reduced. Furthermore, although it is not structurally necessary, post-treatment is performed by injecting a filler into the gap between the outer wall of the rehabilitation pipe and the inner wall of the sewer pipe that occurs when the rehabilitation pipe is drawn into the sewer pipe at the request of the client. If this process is performed, the next pipeline rehabilitation becomes virtually impossible.
- Patent Document 1 In the drainage pipe repair device described in Patent Document 1, it is necessary to install a rotating drum and a winch near the manhole. In the pipeline rehabilitation method described in Patent Document 2, it is necessary to install a hot air generator and a pressurizer near the manhole.
- the rehabilitation pipe used in the method of Patent Document 2 must be thin due to the above configuration, it is difficult to ensure sufficient mechanical strength. Therefore, the method of Patent Document 2 has long-term stability and safety. It cannot be said that it is preferable in ensuring.
- the present invention has been made in consideration of the problems in the conventional drainage pipe repair method as described above, and a rehabilitation pipe drawing method and a rehabilitation pipe that can smoothly draw a rehabilitation pipe having a larger diameter than the conventional one into a sewer pipe. It is a first object to provide a pipeline.
- the rehabilitation pipe in the rehabilitation pipe retraction process, the rehabilitation pipe can no longer be retracted in the middle of the retraction, and the rehabilitation pipe that has been pulled in halfway can be removed, or a smaller diameter rehabilitation pipe can be reintroduced.
- a secondary objective is to provide a rehabilitation pipe pull-in method that can prevent the occurrence of inefficient situations.
- the second object of the present invention is to provide a rehabilitation pipe retracting method capable of retracting the rehabilitation pipe even when the area around the manhole on the ground cannot be occupied.
- the present invention is a rehabilitation pipe drawing method for drawing a flexible resin pipe as a rehabilitation pipe into an existing pipe, Preparing a dummy rehabilitation pipe simulating the above rehabilitation pipe; A determination jig mounting step of mounting a determination jig for determining whether or not the rehabilitation pipe can be pulled in at the distal end of the dummy rehabilitation pipe; A dummy drawing-in step of drawing the dummy rehabilitation pipe with the judgment jig into the existing pipe; After confirming the completion of the passage of the dummy rehabilitation pipe with the judgment jig, a retraction jig attaching step of attaching a retraction jig to the tip of the rehabilitation pipe, Including a placement step of placing the rehabilitated pipe over the entire length of the existing pipe by inserting the rehabilitated pipe with the retraction jig into the existing pipe from the opening of the existing pipe and pulling the retraction jig with a wire.
- the rehabilitation pipe retracting method characterized by the above.
- the existing pipe is a drainage channel connected between manholes, and the rehabilitation pipe with a drawing jig is carried in from the upper opening of one manhole, and further the opening of the drainage channel It can insert into the said drainage channel from a part, and the said drawing jig
- tool can be pulled with a wire from the other manhole side.
- the rehabilitation pipe retracting method further includes a retracting jig attaching step of attaching a retracting jig to a rear end portion of the dummy rehabilitating pipe.
- a retracting jig attaching step of attaching a retracting jig to a rear end portion of the dummy rehabilitating pipe.
- the determination jig includes a conical insertion portion, a cylindrical main body portion extending from the skirt portion of the insertion portion, a diameter reduced from the cylindrical main body portion, and extended rearward. It is preferable to provide a cylindrical fixing part for fixing the dummy rehabilitation pipe.
- the outer diameter of the cylindrical main body is larger than the outer diameter of the rehabilitation pipe.
- the determination jig further includes a twist back member inside the insertion portion and the cylindrical main body portion.
- a diagnostic step for passing a diagnostic jig for detecting a narrow portion in the existing pipe and excavating and expanding the detected narrow portion in the existing pipe.
- a drilling step for passing a diagnostic jig for detecting a narrow portion in the existing pipe and excavating and expanding the detected narrow portion in the existing pipe.
- the rehabilitation pipe retracting method further includes a drum installation step of installing a drum around which the rehabilitation pipe is wound above the uppermost manhole in the manhole communicating with the existing pipe; A winch installation step of installing a winch on the most downstream manhole separated from the side manhole by at least two spans and a connection step of connecting a wire unwound from the winch to the drawing jig, By winding the winch, the rehabilitated pipe can be continuously drawn into the existing pipe having two or more spans.
- the existing pipe is a sewer pipe
- the rehabilitated pipe can be drawn into the existing pipe under sewage service.
- the rehabilitation pipe passing through the intermediate manhole interposed between the most upstream manhole and the most downstream manhole is cut in accordance with the inner wall surface of the intermediate manhole after the rehabilitation pipe is drawn. .
- the pipe line according to the present invention is rehabilitated by the rehabilitation pipe drawing method.
- the rehabilitation pipe retracting method of the present invention it is possible to easily determine whether or not the rehabilitation pipe can be retracted with respect to the existing pipe to be rehabilitated, so that the rehabilitation pipe having a diameter larger than that of the conventional pipe is smoothly drawn into the existing pipe. be able to.
- the existing pipe can be rehabilitated continuously over a plurality of spans (the existing pipe length connecting adjacent manholes is one span) under sewage service.
- Rehabilitation pipes can be retracted even if the area around the manhole cannot be occupied.
- FIG. 1 It is explanatory drawing which shows the drainage channel to which the rehabilitation pipe drawing-in method of this invention is applied.
- (A)-(c) is a front view which shows the bending
- (d) is a top view which shows a horizontal shift.
- (A) is side surface sectional drawing of the determination jig
- (A) is side surface sectional drawing of the drawing jig
- (A) is side sectional drawing of another drawing-in jig
- FIG. 7 is an external view of a diagnostic jig 60 according to Modification 1.
- FIG. It is a flowchart which shows the procedure of the pipe renovation work in the modification 1. It is explanatory drawing which shows the drainage channel to which the pipe line renovation method of this invention is applied.
- FIG. 1 shows a drainage channel as an aging existing pipe to which the rehabilitation pipe drawing method of the present invention is applied.
- a drainage channel 1 is formed by connecting a plurality of concrete drainage pipes 1a and burying them in the soil.
- One end of the drainage channel 1 is connected to, for example, a lower opening 2 a provided at the lower portion of the upstream manhole 2.
- the other end of the drainage channel 1 is connected to a lower opening 3 a provided at the lower part of the downstream manhole 3.
- the drainage channel 1 is first inspected. Specifically, a high-pressure washing vehicle is arranged, and the inside of the drainage channel 1 to be rehabilitated is washed with high-pressure water (cleaning process). Next, a self-propelled camera is inserted into the drainage channel 1 to investigate whether there is an obstacle such as a tree root that obstructs the retraction of the rehabilitation pipe (survey process).
- FIG. 1 shows a water stop plug 4 for preventing sewage from the upstream side from entering the drainage channel 1 and a drum 5 around which a rehabilitation pipe is wound.
- FIG. 2 (a) Checking operation in rehabilitation pipe drawing
- the pipe body of the drain pipe 1a is bent with age (see section A), or as shown in FIG. 2 (b) (See section B), a step (vertical misalignment) occurs as shown in FIG. 2 (c) (see section C), and a lateral misalignment as shown in the plan view of FIG. 2 (d). May occur (see part D).
- the permissible values are set for the bending angle, gap, step, and lateral displacement between drain pipes.
- the allowable values are set such that the bending angle between the drain pipes 1a is about 10 ° or less, the gap is about 100 mm or less, the step is about 10 mm or less, and the lateral displacement is about 10 mm or less.
- each said tolerance value is set based on the pullability data obtained by factory experiment or field construction for every combination of a sewer pipe and the renovated pipe to be inserted into the sewer pipe.
- Judgment Jig Prepare a dummy rehabilitation pipe (preparation process) in which a rehabilitation pipe (described later) is cut to a length of about 50 to 60 cm (preparation step). The determination jig shown in b) is mounted (determination jig mounting step).
- a plurality of types of dummy rehabilitation pipes 30 ' (see FIG. 7) prepared by cutting a plurality of types of rehabilitation pipes having different diameters are prepared. Also, a plurality of types of determination jigs having different diameters are prepared, and the plurality of types of determination jigs are attached to the insertion-side end portions of the corresponding plurality of types of dummy rehabilitation pipes.
- FIG. 3A is a side sectional view of the determination jig.
- FIG. 3B is a right side view thereof. However, FIG. 3B shows a state in which the rear eyenut 15 (described later) is removed.
- the determination jig 10 includes a conical insertion portion 11a, a cylindrical main body portion 11b extending from the skirt portion of the insertion portion 11a, and the cylindrical main body portion 11b.
- the jig main body 11 made of a metal member made of iron or steel, which is integrally formed with a cylindrical fixing portion 11c for fixing the dummy rehabilitating pipe 30 ', having a diameter reduced from the rear, is provided. is doing.
- the outer diameter ⁇ E of the cylindrical fixing portion 11c is substantially equal to the inner diameter of the dummy rehabilitation pipe, and is fixed in a state where the dummy rehabilitation pipe 30 ′ is in close contact.
- the outer diameter ⁇ F of the cylindrical main body 11b is formed to be slightly larger than the outer diameter of the dummy rehabilitation pipe 30 ′. Specifically, ⁇ F is formed to be about 1 mm larger than the outer diameter of the dummy rehabilitation pipe 30 ′ so as not to be freely inserted through the drainage channel 1 (so as to give some restrictions to the free insertion). is doing.
- a step 11d is provided at a boundary portion between the cylindrical main body portion 11b and the cylindrical fixing portion 11c.
- the axial length L of the cylindrical main body 11b is set to about 40 to 60 mm, for example.
- the axial length of the insertion portion 11a is set to approximately F / 2.
- the dummy rehabilitation pipe 30 ' is formed to have an appearance corresponding to the corrugated pipe or the corrugated pipe.
- the cylindrical fixing portion 11c is provided with a plurality of screw holes at equal intervals along the direction of the ridge reinforcing portion formed in a spiral shape on the outer surface of the dummy rehabilitation pipe 30 '.
- the one end portion of the dummy rehabilitation pipe 30 'and the cylindrical fixing portion 11c can be detachably fixed using a plurality of screws.
- a nut 12 is welded to the inside of the tip of the determination jig 10.
- a bolt 13 disposed on the center line CL of the jig body 11 is screwed to the nut 12.
- the front end of the bolt 13 protrudes from the tip of the jig body 11 by a predetermined length.
- a front eye nut 14 is screwed to the front end of the bolt 13 and is integrated with the jig body 11.
- a rear eyenut 15 is screwed to the rear end (rear end) of the bolt 13. By tightening another nut 16, the screwed rear eye nut 15 is fixed. The length of the bolt 13 is adjusted so that the rear eye nut 15 is accommodated in the jig body 11.
- FIG. 4A is a side sectional view of the retracting jig
- FIG. 4B is a right side view thereof.
- the pull-in jig 20 is made of a metal member made of iron or steel, like the determination jig 10.
- a hemispherical insertion portion 21a and a cylindrical fixing portion 21b for fixing the rehabilitation pipe are integrally formed to constitute the jig body 21.
- the outer diameter ⁇ G of the insertion portion 21a is formed equal to or smaller than the outer diameter of the rehabilitation pipe. Specifically, the outer diameter ⁇ G is formed to be equal to or smaller than the outer diameter of the ridge reinforcing portion (ridge portion) formed in a spiral shape on the outer surface of the rehabilitation pipe. Thereby, the drawing-in jig
- a step 21c is formed at the boundary between the insertion portion 21a and the cylindrical fixing portion 21b.
- the cylindrical fixing portion 21b is provided with a plurality of screw holes at equal intervals along the direction of the ridge reinforcing portion of the rehabilitation pipe.
- the one end portion of the rehabilitation tube and the cylindrical fixing portion 21b can be detachably fixed using a plurality of screws.
- FIG. 5 (a) is a side sectional view of another drawing jig
- FIG. 5 (b) is a rear view of the drawing jig.
- symbol is attached
- the drawing jig 25 is made of a metal member made of iron or steel, like the judgment jig 10 and the drawing jig 20.
- a hemispherical insertion portion 26a and a cylindrical fixing portion 21b for fixing the rehabilitation pipe are integrally formed to constitute the jig body 26.
- the insertion portion 26a has a hole for containing the twist back 27 in the center of the insertion portion 21a in FIG.
- the twist back 27 is for removing the twist generated in the wire, and is contained in the center of the jig body 26.
- a nut 28 is welded to the outside of the rear end portion of the drawing jig 25.
- An eye bolt 29 is screwed onto the nut 28 and is integrated with the jig body 26. In place of the nut 28 and the eyebolt 29, a bolt and an eyenut may be used.
- the front eyenut 14 at the front end of the retraction jig 20 is separately attached with a twist back.
- the torsion return 27 does not protrude from the tip of the retraction jig 25 because the torsion return 27 is included in the retraction jig 25. Therefore, since the rehabilitation pipe can be drawn to a position where the tip of the retraction jig 25 comes close to the end of the pulley 32 (see FIG. 7), work efficiency such as removal work of the retraction jig 25 and rehabilitation pipe cutting work. Can be improved.
- FIG. 6 is a front view showing the structure of the rehabilitation pipe.
- the rehabilitation pipe 30 is composed of a corrugated resin pipe having a straight pipe portion 30a and a ridge reinforcing portion 30b formed in a spiral shape on the outer surface of the straight pipe portion 30a.
- the rehabilitation tube 30 has, for example, an outer diameter of 150 to 450 mm, an inner diameter of 135 to 435 mm, a helical pitch of 8 to 40 mm, a core material height of 6 to 20 mm, and a core material width of 6 to 30 mm.
- the width of the core material is preferably set in the range of 30 to 75% with respect to the helical pitch.
- the thickness is preferably set in the range of 10 to 50% of the core height for the same reason as described above.
- the straight pipe portion 30a is composed of a lower wound soft resin layer 30c and an upper wound soft resin layer 30d.
- a ridge reinforcing portion 30b composed of a core material covering portion 30e and a hard resin core material 30f is wound and laminated.
- the appearance of the rehabilitation pipe 30 is similar to a conventional corrugated pipe, in the first embodiment, the strength of each component of the rehabilitation pipe 30 is optimized, so that the rehabilitation pipe 30 is a self-supporting rehabilitation pipe. It is configured. Therefore, it is not necessary to fill the entire gap between the inner wall of the drainage channel 1 and the outer wall of the rehabilitation pipe 30 with the grout as a filler. Only the inlet and outlet portions of the rehabilitation pipe 30 can be filled with grout as necessary.
- the lower winding soft resin layer 30c is composed of a thermoplastic resin excellent in chemical resistance, such as a vinyl chloride resin, a polyolefin resin, or an olefin-based or styrene-based thermoplastic elastomer, or the like. Can do.
- the upper wound soft resin layer 30d is a thermoplastic resin having good adhesion and chemical resistance to the lower wound soft resin layer 30c, such as styrene, olefin, nylon, polyester, polyamide. It can be molded with a thermoplastic elastomer such as polystyrene or polystyrene.
- thermoplastic elastomers it is more preferable to add an olefin resin to these thermoplastic elastomers because the internal pressure, external pressure, flat strength, compressive strength, and tensile strength can be improved.
- PP, PE, etc. are shown as said olefin resin.
- the core material covering section 30e is made of a material having the same or similar properties as the above-described upper wound soft resin layer 30d. When wound spirally around the outer surface of the resin layer 30d, the upper soft resin layer 30d is heat-sealed and integrated.
- the hard resin core material 30f is made of PE (polyethylene), PP (polypropylene), PPE (polyphenylene ether), PPS (polyphenylene sulfide), PEI (polyetherimide), PAR Polyarylate), PES (polyethersulfone), PEEK (polyetheretherketone), PTFE (polytetrafluoroethylene), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PA (polyamide), POM (polyacetal) Any one of saturated polyesters and polymer blends thereof is preferred. In the process of forming the core material covering portion 30e into a cylindrical shape, the core material covering portion 30e is wound into the cylinder.
- the hard resin core material 30f and the core material covering portion 30e are heat-sealed, and the core material covering portion 30e wraps the entire circumference of the hard resin core material 30f, so that the substantially hard resin core material 30f is wrapped. Is integrated with the core covering portion 30e.
- the hard resin core material 30f and the core material covering portion 30e are made of glass fiber, carbon fiber, aramid fiber, potassium titanate whisker, talc, mica, calcium carbonate, carbon black, hydrous calcium silicate, magnesium carbonate, etc. It can also be reinforced with reinforcements and fillers.
- the rehabilitation pipe 30 of the first embodiment since the straight pipe portion 30a is composed of a soft resin layer, when the drum 5 (see FIG. 1) is carried into the upstream manhole 2, the upstream manhole 2 is subsequently continued. When inserted into the drainage channel 1 from the inside, the rehabilitation pipe 30 can be bent with a necessary and sufficient curvature, and the construction can be easily performed.
- the rehabilitated pipe in which the ridge reinforcing part is formed in a spiral has been described.
- the ridge reinforcing part is not limited to a spiral, and concentric rings are repeatedly formed in a mountain / valley shape in the pipe axis direction. It may be.
- FIGS. 7 to 10 are explanatory views showing a rehabilitation pipe retraction method.
- [6-1] Confirmation with Judgment Jig In FIG. 7, before the rehabilitation pipe is drawn, first, it is confirmed whether or not the rehabilitation pipe can be drawn into the drainage channel 1 (see FIG. 1). In FIG. 7, the same components as those in FIG.
- a dummy rehabilitation pipe 30 ′ equipped with a determination jig 10 (see FIG. 3) is inserted into the drainage channel 1 from the upstream manhole 2.
- One end of a wire 31 is connected to the front eye nut 14 of the determination jig 10.
- the other end of the wire 31 is wound up by a winch 33 via a pulley 32 disposed in the downstream manhole 3.
- another wire 34 is also connected to the rear eye nut 15 (see FIG. 3) in the determination jig 10.
- the dummy rehabilitation pipe 30 ′ with the determination jig 10 is connected via the wire 34.
- a guide body (not shown) having a shape similar to that of the determination jig 10 can be provided at the rear end portion of the dummy rehabilitation pipe 30 '.
- a dummy rehabilitation pipe 30 'with a determination jig 10 is inserted into the drainage channel 1 including various displacements shown in FIG. 2 (dummy pull-in process).
- the judgment jig 10 Since the cylindrical main body 11b is parallel to the inner wall on the downstream side of the drainage pipe 1a, it contacts the inner wall, and the smooth passage of the dummy rehabilitation pipe 30 'with the judgment jig 10 is prevented.
- the length of the cylindrical main body portion 11b of the determination jig 10 is shorter than the allowable value of the gap. Smooth passage of the dummy rehabilitation pipe 30 'with the tool 10 is hindered.
- the dummy rehabilitating pipe 30 ′ with the judging jig 10 passes smoothly through the drainage channel 1, it is determined that the rehabilitating pipe can be retracted even if the sewer pipe is deformed.
- the winding resistance of the winch 33 increases. Therefore, by monitoring the winding resistance, it is possible to identify a location that is obstructing passage.
- step (vertical deviation) shown in FIG. 2C is generated at the specified location, an in-pipe working robot is inserted into the sewer pipe, and the inner wall of the drain pipe 1a is cut so that the step is reduced. To do. Thereby, the environment which can draw in a rehabilitation pipe is prepared.
- a guide roller device 40 for smoothly feeding the rehabilitation pipe 30 into the upstream manhole 2 is installed in the upper opening 2b. Further, a guide device 41 is installed at the bottom of the upstream manhole 2 to change the traveling direction of the rehabilitating pipe descending in the upstream manhole 2 toward the drainage channel 1, that is, in the lateral direction.
- the winch 33 and the pulley 32 shown in FIG. 7 are installed in the upper opening 3b of the downstream manhole. Thereby, preparation for drawing in the rehabilitation pipe 30 is completed.
- FIG. 9 a retraction jig 20 is attached to the tip of the rehabilitation pipe 30 unwound from the drum 5, and the rehabilitation pipe 30 with the retraction jig 20 passes through the upper opening 2b to the upstream manhole 2.
- the wire 31 unwound from the winch 33 that is used when the dummy rehabilitating tube 30 ′ with the determination jig 10 is inserted is connected to the front eye nut 14 (see FIG. 4) of the drawing jig 20.
- a filler capable of obtaining a high water-stop and strength after curing, such as an epoxy resin or a mortar containing a quick setting admixture.
- a backfill material is injected into the clearance between the inner wall of the drainage channel 1 and the outer wall of the rehabilitation pipe 30 other than the inlet part and the outlet part as necessary.
- FIG. 10 shows the rehabilitation pipe 30 in a state of being penetrated and fixed in the drainage channel 1.
- a filling material that is easy to fill, such as a grout in which mortar and a chemical solution are mixed, or a plastic foam such as polyurethane foam in which isocyanate and polyol are mixed.
- the rehabilitation pipe in the rehabilitation pipe retraction process, the rehabilitation pipe cannot be withdrawn during the retraction, and the rehabilitation pipe withdrawn to the middle is removed, or the rehabilitation pipe with a smaller diameter. It is possible to prevent the occurrence of an inefficient situation such as redrawing.
- a diagnosis jig (to be described later) is passed through the drainage channel 1 in order to detect a narrow portion in the drainage channel 1.
- the diagnostic process it is preferable to perform the operation while inserting a camera from behind the diagnostic jig and confirming the passing state of the diagnostic jig.
- an excavator is inserted into a narrow spot in the drainage channel 1 detected by the diagnosis process, and the inner wall of the drainage path 1 is cut so that the narrow spot becomes wider.
- FIG. 11 is an external view of a diagnostic jig 60 according to the first modification.
- a diagnostic jig 60 according to Modification 1 includes a conical insertion portion 61a, a cylindrical main body portion 61b extending from the skirt portion of the insertion portion 61a, and a conical pullback portion 61c.
- a jig body 61 made of a metal member made of iron or steel is formed.
- the outer diameter ⁇ F ′ of the cylindrical main body 61b is slightly smaller than the outer diameter of the dummy rehabilitation pipe 30 ′. Specifically, ⁇ F ′ is formed to be smaller than the outer diameter of the dummy rehabilitation pipe 30 ′ by about 35 mm, and is easily inserted into the drainage channel 1.
- the axial length of the diagnostic jig 60 is not more than the inner diameter of the manhole (900 mm in Japan) from the viewpoint of workability.
- the axial length L1 of the cylindrical main body 61b is set to about 250 to 500 mm, for example, and the axial length L2 of the insertion portion 61a and the axial length L3 of the pull-back portion 61c are about 200 to 300 mm. Is set.
- the diagnostic jig 60 further includes a plurality of roller portions 62 protruding from the surface of the cylindrical main body portion 61b by, for example, about 15 mm.
- the roller portion 62 rotates against the inner wall of the drainage channel 1 when the diagnostic jig 60 passes through the drainage channel 1.
- the roller portion 62 includes a mechanism for retracting into the cylindrical main body portion 61b in accordance with the pressure received from the inner wall. When the roller portion 62 passes through a narrow portion in the drainage channel 1, the roller portion 62 reacts with a built-in sensor.
- the diagnostic jig 60 has output means such as sound, light, and signal. When the sensor reacts, the diagnostic jig 60 outputs an output to notify the operator that the vehicle is passing through a narrow part. An operator who has received an output indicating that he is passing through a narrow portion can confirm and record the position of the diagnostic jig 60 based on the length of the wire 31 wound around the winch 33 or the like.
- An eye nut 63a is screwed into the distal end portion of the insertion portion 61a.
- An eye nut 63c is screwed to the distal end portion of the retracting portion 61c.
- FIG. 12 is a flowchart showing a procedure of pipe rehabilitation work in the first modification. Below, along with FIG. 12, the procedure of pipe renovation work is demonstrated. (1) A high-pressure washing vehicle is arranged, and the inside of the drainage channel 1 to be rehabilitated is washed with high-pressure water (cleaning process).
- a self-propelled camera is inserted into the drainage channel 1 to investigate whether there are obstacles such as tree roots that obstruct the rehabilitation pipe pull-in (survey process).
- an in-pipe work robot is inserted into the drainage channel 1 to perform pretreatment such as obstacle removal (obstacle removal step).
- the diagnostic jig 60 is passed through the drainage channel 1 to detect a narrow portion in the drainage channel 1 (diagnosis process). In addition, you may perform a diagnostic process simultaneously with the investigation process of said (2).
- An excavator is inserted into a narrow spot detected in the diagnosis process, and the inner wall of the drainage channel 1 is excavated and widened so that the narrow spot becomes wide (excavation process). The excavation process may be performed simultaneously with the obstacle removal process.
- a dummy rehabilitation pipe 30 ' is prepared (preparation process).
- the determination jig 10 is attached to the insertion-side tip of the dummy rehabilitation pipe 30 '(determination jig attachment step).
- the dummy rehabilitation pipe 30 ′ with the determination jig 10 is drawn into the drainage channel 1 (dummy drawing step).
- the retraction jig 20 or 25 is attached to the tip of the rehabilitation pipe 30 (retraction jig attachment process).
- FIG. 13 shows a drainage channel as an aging existing pipe to which the pipe rehabilitation method of the present invention is applied.
- the drainage channel 201 is formed by connecting a plurality of concrete drainage pipes 201a and burying them in the soil.
- One end of the drainage channel 201 is connected to, for example, a lower opening 202a provided in a lower portion of the manhole 202 on the most upstream side.
- the other end of the drainage channel 201 is connected to a lower opening 203 a provided at the lower part of the downstream manhole 203.
- the drainage channel 201 is first inspected. Specifically, the high-pressure washing vehicle is disposed in the vicinity of the manhole 203 on the downstream side, and the inside of the drainage channel 201 is washed with high-pressure water (cleaning process). Next, a self-propelled camera (not shown) is inserted into the drainage channel 201 to investigate whether there is an obstacle such as a tree root that obstructs the retraction of the rehabilitation pipe (survey process).
- an in-pipe work robot is inserted into the drainage channel 201 and pretreatment such as obstacle removal is performed (obstacle removal step).
- a water stop plug 204 for preventing sewage from the upstream side from entering the drainage channel 201 and a drum 205 around which a rehabilitation pipe is wound are shown.
- the rehabilitation pipe can be drawn in service without using the water stop plug 204.
- the same inspection is performed for all drainage channels to be rehabilitated.
- the configuration of the rehabilitation pipe in the second embodiment is the same as that of the rehabilitation pipe 30 in the first embodiment shown in FIG.
- the rehabilitation pipe 30 is configured as a self-supporting rehabilitation pipe because each component of the rehabilitation pipe 30 is optimized to achieve both strength and flexibility. Therefore, after the renovated pipe 30 is drawn into the drainage channel 201, a heating diameter expansion process for bringing the renovated pipe 30 into close contact with the inner wall of the drainage channel 201 is not required. Therefore, if the drainage channel 201 is rehabilitated using the rehabilitation pipe 30 having the above-described configuration, a hot air generator / pressurizer for heating and expanding the diameter becomes unnecessary.
- the grout can be filled as a backfill material. Not only the grout but also a plastic foam such as polyurethane foam in which isocyanate and polyol are mixed can be used as the backfill material.
- the rehabilitation pipe 30 of this embodiment since the straight pipe portion 30a is composed of a soft resin layer, the rehabilitation pipe 30 is carried from the drum 205 (see FIG. 13) into the uppermost manhole 202 and continuously. Therefore, when inserting into the drainage channel 201 from the manhole 202 on the most upstream side, the rehabilitation pipe 30 can be bent with a necessary and sufficient curvature, and the construction can be performed easily.
- a drum 205 around which the rehabilitation pipe 30 is wound is disposed in the vicinity of the upper opening 202b in the manhole 202 on the most upstream side (drum installation step).
- a drawing jig 211 is attached to the tip of the rehabilitation pipe 30.
- the drainage channel 201 connects a manhole 202 on the most upstream side and a manhole 203 on the downstream side. Further, the drainage channel 201 ′ connects the manhole 203 and the manhole 206 on the most downstream side.
- a guide roller device 220 for smoothly feeding the rehabilitation pipe 30 into the most upstream manhole 202 is installed in the upper opening 202b of the most upstream manhole 202.
- a guide device 230 is installed at the bottom of the most upstream manhole 202 to change the moving direction of the rehabilitation pipe 30 descending in the most upstream manhole 202 toward the drainage channel 201, that is, in the lateral direction. To do.
- the winch 240 and the pulley 241 are installed in the upper opening 206b of the manhole 206 on the most downstream side (winch installation process). Thereby, preparation for drawing in the rehabilitation pipe 30 is completed.
- a lower opening 206a is provided in the lower portion of the most downstream manhole 206.
- the equipment installed on the manholes of the drainage channels 201 and 201 ′ to be rehabilitated is only the drum 205 and the winch 240 that do not require a large space.
- FIG. 15 the drawing jig 211 is attached to the tip of the rehabilitation pipe 30 unwound from the drum 205, and the rehabilitation pipe 30 with the drawing jig is fed into the uppermost manhole 202 through the upper opening 202b.
- the wire 240a unwound from the winch 240 installed in the manhole 206 on the most downstream side is connected to the drawing jig 211 (connection process).
- the rehabilitation pipe 30 When the winch 240 is driven in the winding direction in this state, the rehabilitation pipe 30 is pulled in the direction of the arrow H through the drainage channel 201 via the wire 240a. As a result, the rehabilitation pipe 30 is drawn into the drainage channel 201 connecting the uppermost manhole 202 and the intermediate manhole 203, and subsequently connects the intermediate manhole 203 and the most downstream manhole 206. Continuously drawn into the drainage channel 201 '.
- the part A which crosses the manhole is cut
- the cut end of the rehabilitation pipe 30 is processed.
- the rehabilitation pipe 30 is cut so that the rehabilitation pipe 30 drawn into the most upstream manhole 202 is substantially flush with the inner wall of the most upstream manhole 202.
- the inner wall of the drainage channel 201 and the rehabilitation pipe 30 Each end portion of the rehabilitated pipe 30 that has been cut is fixed by filling the gap with the outer wall with a pipe finish.
- FIG. 16 shows drainage channels 201 and 201 ′ rehabilitated by the pipe rehabilitation method of the present invention.
- the pipe guide device, pipe insertion system, and pipe rehabilitation system of the present invention can be widely and suitably applied to rehabilitate underground pipes such as main pipes and branch pipes of drain pipes buried in the ground.
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Abstract
Description
このような問題を解消する方法及び装置が、特許文献1及び2に開示されている。
上記更生管を模擬したダミー更生管を用意する用意工程と、
上記更生管の引込みが可能かどうかを判定するための判定治具を上記ダミー更生管の挿入側先端部に装着する判定治具装着工程と、
上記既設管内に上記判定治具付きダミー更生管を引込むダミー引込み工程と、
上記判定治具付きダミー更生管の通過完了を確認した後、上記更生管の先端部に引込治具を装着する引込治具装着工程と、
上記引込治具付き更生管を上記既設管の開口部からその既設管内に挿入し、上記引込治具をワイヤで引っ張ることにより、上記既設管全長にわたって上記更生管を配置する配置工程とを含むことを特徴とする更生管引込み方法である。
本発明において、最上流側マンホールと最下流側マンホールの間に介設されている中間マンホール内を通過している上記更生管については、更生管引込み後にその中間マンホール内壁面に合わせて切断される。
本発明に係る管路は、上記更生管引込み方法により更生される。
以下、図面に示した実施形態に基づいて本発明を詳細に説明する。
[1]排水路の点検
図1は、本発明の更生管引込み方法が適用される老朽化した既設管としての排水路を示したものである。
具体的には、高圧洗浄車を配置させ、更生対象の排水路1の内部を高圧水で洗浄する(洗浄工程)。
次に、排水路1内に自走式カメラを挿入し、更生管の引込みに支障となる木根等の障害物があるかどうか調査が行われる(調査工程)。
図2(a)において、老朽化に伴なって排水管1aの管本体が屈曲していたり(A部参照)、図2(b)に示すように、隙間が生じていたり(B部参照)、図2(c)に示すように段差(縦ズレ)が生じていたり(C部参照)、また、図2(d)の平面図に示すように横ズレが生じていたり(D部参照)する場合がある。
更生管(後述する)を長さ50~60cm程度に切断したダミー更生管を用意し(用意工程)、その一方端(挿入側先端部)に図3(a)、(b)に示す判定治具を装着する(判定治具装着工程)。
図3(a)は判定治具の側面断面図である。図3(b)はその右側面図である。ただし、図3(b)では後側アイナット15(後述する)を取り外した状態を示している。
筒状本体部11bの外径φFは、ダミー更生管30′の外径よりも若干大きく形成されている。具体的には、φFはダミー更生管30′の外径よりも1mm程度大きく形成されており、排水路1内を敢えて自由に挿通しないように(自由な挿通に若干の制約を与えるように)している。
筒状本体部11bの軸方向長さLは例えば40~60mm程度に設定されている。挿入部11aの軸方向長さは略F/2に設定されている。
筒状固定部11cには、ダミー更生管30′の外面に螺旋状に形成されている突条補強部の向きに沿って複数のネジ孔が等間隔に設けられている。ダミー更生管30′の一方端部と筒状固定部11cとを複数のネジを用いて着脱可能に固定することができるようになっている。
ボルト13の前側端部は治具本体11の先端から所定長さ突出している。ボルト13の前端部に前側アイナット14が螺合され、治具本体11と一体化されている。
次に、更生管を排水路内に引込むための引込治具の構成について説明する。
図4(a)は引込治具の側面断面図であり、同図(b)はその右側面図である。なお、図3に示した判定治具10と同じ構成要素については同一符号を付してその説明を省略する。
また、筒状固定部21bには更生管の突条補強部の向きに沿って複数のネジ孔が等間隔に設けられている。更生管の一方端部と筒状固定部21bは複数のネジを用いて着脱可能に固定することができるようになっている。
捩れ戻し27はワイヤに生じた捩れを取るためのものであり、治具本体26の中央に内包される。
引込治具25の後端部外側にはナット28が溶接されている。ナット28にアイボルト29が螺合され、治具本体26と一体化されている。なお、ナット28とアイボルト29の代わりにボルトとアイナットを用いてもよい。
一方、引込治具25を用いて引込みを行う場合には、捩れ戻し27が引込治具25に内包されているので、引込治具25の先端から捩れ戻しがはみ出すことがない。よって、引込治具25の先端が滑車32(図7参照)のギリギリ近くにくる位置まで、更生管を引込むことができるので、引込治具25の取り外し作業や更生管の切断作業等の作業効率を向上させることができる。
図6は更生管の構成を示す正面図である。
図6において更生管30は、直管部30aと、その直管部30aの外面に螺旋状に形成された突条補強部30bとを有する波付き樹脂管から構成されている。
下巻軟質樹脂層30cは、耐薬品性に優れた熱可塑性樹脂、例えば塩化ビニル樹脂、ポリオレフィン樹脂、或いは例えばオレフィン系、スチレン系の熱可塑性エラストマー等から構成することができる。
上巻軟質樹脂層30dは、下巻軟質樹脂層30cと接着性が良く耐薬品性に優れた熱可塑性樹脂、例えばスチレン系、オレフィン系、ナイロン系、ポリエステル系、ポリアミド系、ポリスチレン系の熱可塑性エラストマー等で成形することができる。
芯材被覆部30eは、上記上巻軟質樹脂層30dと同じかまたは類似性質の材質からなり、更生管30の製造工程において筒状に成形されるとともに、上巻軟質樹脂層30dの外面に螺旋状に巻回される際にその上巻軟質樹脂層30dと熱融着し一体化されるようになっている。
硬質樹脂製芯材30fは、棒状に押し出されるPE(ポリエチレン)、PP(ポリプロピレン)、PPE(ポリフェニレンエーテル)、PPS(ポリフェニレンサルファイド)、PEI(ポリエーテルイミド)、PAR(ポリアリレート)、PES(ポリエーテルサルホン)、PEEK(ポリエーテルエーテルケトン)、PTFE(ポリテトラフロロエチレン)、PET(ポリエチレンテレフタレート)、PBT(ポリブチレンテレフタレート)、PA(ポリアミド)、POM(ポリアセタール)、飽和ポリエステル及びこれらのポリマーブレンド体のいずれか一つが好ましい。上記芯材被覆部30eが筒状に成形される過程でその筒内に巻き込まれるようになっている。
図7~10は更生管引込み方法を示した説明図である。
[6-1]判定治具による確認
図7において、更生管を引込む前に、まず、排水路1(図1参照)内に更生管を引込むことが可能かどうかの確認作業を行う。なお、図7において図1と同じ構成要素については同一符号を付してその説明を省略する。
判定治具10の前側アイナット14にはワイヤ31の一方端が接続されている。ワイヤ31の他方端は下流側マンホール3内に配置された滑車32を介しウインチ33で巻き取られるようになっている。
図2(a)の場合、連結部分の屈曲角が許容値を超えている2個の排水管1aの間に判定治具10付きダミー更生管30′を通過させようとすると、判定治具10の筒状本体部11bが排水管1aの下流側の内壁と平行であるためその内壁に接触し、判定治具10付きダミー更生管30′の円滑な通過が妨げられる。
図8において、上流側マンホール2における上部開口部2bの近傍に、更生管30が巻き付けられたドラム5を配置する。更生管30の先端部には図4に示した引込治具20、または図5に示した引込治具25を装着する(引込治具装着工程)。
さらに、上流側マンホール2の底部には、上流側マンホール2内を降下してくる更生管の進行方向を排水路1に向けて、すなわち横方向に変更するガイド装置41が設置される。
それにより、更生管30の引込み準備が完了する。
次に、図9において、ドラム5から巻き解かれた更生管30の先端部には、引込治具20が装着され、引込治具20付き更生管30は、上部開口部2bを通じて上流側マンホール2内に送り込まれ、引込治具20の前側アイナット14(図4参照)に対し、判定治具10付きダミー更生管30′の挿入時に使用されウインチ33から巻き解かれたワイヤ31が接続される。
排水路1内を更生管30が貫通し、下流側マンホール3側から更生管30の先端部が所定長さ突出した状態でその突出した部分を切断する。
上流側マンホール2側でも排水路1から延長している更生管30を切断する。
なお、上記入口部分及び出口部分以外の排水路1内壁と更生管30外壁との隙間については、必要に応じて裏込め材(充填材)が注入される。
上記裏込め材には、例えばモルタルと薬液を混合したグラウトや、イソシアネートとポリオールとを混合するポリウレタンフォーム等のプラスチック製発泡体などのように、充填し易い充填材を使用することが望ましい。
実施形態1に係る管路更生方法によれば、更生すべき既設管について更生管の引込みが可能かどうかを簡便に判定することができるので、従来よりも径が大きな更生管を下水管に円滑に引込むことができる。
変形例1は、実施形態1のダミー引込み工程より前に、診断工程と掘削工程とを行う。
掘削工程は、診断工程により検知された排水路1内の狭い箇所に、掘削機を挿入し、その狭い箇所が広くなるように排水路1の内壁を切削する。
図11は、変形例1に係る診断治具60の外観図である。図11において、変形例1に係る診断治具60は、円錐状の挿入部61aと、挿入部61aの裾部から延設された筒状本体部61bと、円錐状の引戻部61cとから形成された、鉄製または鋼製の金属製部材からなる治具本体61を有している。
診断治具60の軸方向長さは、作業性の観点から、マンホールの内径(日本の場合は900mm)以下であれば問題ない。例えば、筒状本体部61bの軸方向長さL1は例えば250~500mm程度に設定され、挿入部61aの軸方向長さL2及び引戻部61cの軸方向長さL3は、200~300mm程度に設定されている。
ローラ部62は、診断治具60が排水路1内を通過する際に、排水路1の内壁に当たって回転する。またローラ部62は、内壁から受ける圧力に応じて筒状本体部61bの内部へ引っ込む機構を備えており、排水路1内の狭い箇所を通過する際に大きく引っ込んで内蔵するセンサーを反応させる。
挿入部61aの先端部には、アイナット63aが螺合されている。
引戻部61cの先端部には、アイナット63cが螺合されている。
図12は、変形例1における管更生作業の手順を示す流れ図である。
以下に、図12に沿って、管更生作業の手順を説明する。
(1)高圧洗浄車を配置させ、更生対象の排水路1の内部を高圧水で洗浄する(洗浄工程)。
(3)障害物を除去する必要があれば管内作業用ロボットを排水路1内に挿入し障害物除去等の前処理を行う(障害物除去工程)。
(5)診断工程において検知された狭い箇所に掘削機を挿入し、その狭い箇所が広くなるように排水路1の内壁を掘削して広げる(掘削工程)。なお、掘削工程は障害物除去工程と同時に行ってもよい。
(7)判定治具10をダミー更生管30′の挿入側先端部に装着する(判定治具装着工程)。
(9)判定治具10付きダミー更生管30′の通過完了を確認した後、更生管30の先端部に引込治具20または25を装着する(引込治具装着工程)。
(11)排水路1から突出している更生管30を切断し、隙間に管口仕上げ材を充填することにより、切断した更生管30の両端部を固定する(仕上工程)。
変形例1に係る管路更生方法によれば、排水路1内に狭い箇所が複数存在する場合に、診断工程において診断治具60を一度通過させるだけで、狭い箇所が全てわかるので、ダミー引込み工程を行う前に診断工程と掘削工程とを行うことにより、ダミー引込み工程において途中まで引込んだ判定治具10付きダミー更生管30′を引込み直す手間が大幅に減り、作業効率を高めることができる。
[1]排水路の点検
図13は、本発明の管路更生方法が適用される老朽化した既設管としての排水路を示している。
具体的には、高圧洗浄車を下流側のマンホール203の近傍に配置させ、排水路201の内部を高圧水で洗浄する(洗浄工程)。
次に、排水路201内に図示しない自走式カメラを挿入し、更生管の引込みに支障となる木根等の障害物があるかどうか調査を行う(調査工程)。
実施形態2における更生管の構成は、図6に示した実施形態1における更生管30の構成と同様である。
実施形態2においては、更生管30の各構成要素について強度と柔軟性を両立させるべく最適化が図られているので、更生管30は自立更生管として構成されている。そのため、更生管30を排水路201内に引込んだ後に、更生管30を排水路201の内壁に密着させるための加熱拡径工程を必要としない。したがって、上記構成を有する更生管30を用いて排水路201を更生すれば、加熱拡径のための熱風発生・加圧器も不要となる。
[3-1]引込み準備(引込み準備工程)
図14において、本発明では最上流側のマンホール202から少なくとも2スパン以上離れた最下流側のマンホール206に至るまでの排水路201,201′を連続的に更生することを目的としている。
なお、排水路201は最上流側のマンホール202とその下流側のマンホール203とを接続している。また排水路201′は上記マンホール203と最下流側のマンホール206とを接続している。
さらに、最上流側のマンホール202の底部には、最上流側のマンホール202内を降下してくる更生管30の進行方向を排水路201に向けて、すなわち横方向に変更するガイド装置230を設置する。
図15において、ドラム205から巻き解かれた更生管30の先端部に、引込治具211を装着し、引込治具付き更生管30を、上部開口部202bを通じて最上流側のマンホール202内に送り込み、引込治具211に対し、最下流側のマンホール206に設置されたウインチ240から巻き解かれたワイヤ240aを接続する(接続工程)。
それにより、更生管30は、最上流側のマンホール202と中間のマンホール203とを接続している排水路201内に引込まれ、引き続いてその中間のマンホール203と最下流側のマンホール206とを接続している排水路201′内に連続的に引込まれる。
排水路201′内を更生管30が貫通し、最下流側のマンホール206の下部開口部206aから更生管30の先端部が所定長さ突出した状態でその突出している先端部を切断する。
次に、最上流側のマンホール202の下部開口部202a、中間のマンホール203の各下部開口部203a、及び最下流側のマンホール206の下部開口部206aについて、排水路201の内壁と更生管30の外壁との隙間に管口仕上げ材を充填することにより、切断した更生管30の各端部を固定する。
本発明の管路更生方法に用いる更生管は工場にて円筒状の自立管として製造されているため、更生管を現場で加熱硬化・冷却する工程を省略することができ、施工時間を大幅に短縮することができる。また、従来の樹脂系更生管では現場での加熱硬化が必要であり、それ故に、臭気を除去するための対策が必要となるが、本発明の管路更生方法ではそのような対策を講じる必要がない。
図16は本発明の管路更生方法によって更生された排水路201、201′を示している。
また、矛盾が生じない限り、実施形態1、変形例1、及び実施形態2を適宜組み合わせることができる。
1a 排水管
2 上流側マンホール
2a 下部開口部
2b 上部開口部
3 下流側マンホール
3a 下部開口部
3b 上部開口部
4 止水プラグ
5 ドラム
10 判定治具
11 治具本体
11a 挿入部
11b 筒状本体部
11c 筒状固定部
11d 段差
12 ナット
13 ボルト
14 前側アイナット
15 後側アイナット
16 別のナット
20 引込治具
21 治具本体
21a 挿入部
21b 筒状固定部
21c 段差
25 引込治具
26 治具本体
26a 挿入部
27 捩れ戻し
28 ナット
29 アイボルト
30 更生管
30a 直管部
30b 突条補強部
30c 下巻軟質樹脂層
30d 上巻軟質樹脂層
30e 芯材被覆部
30f 硬質樹脂製芯材
30′ ダミー更生管
31 ワイヤ
32 滑車
33 ウインチ
34 別のワイヤ
40 ガイドローラ装置
41 ガイド装置
60 診断治具
61 治具本体
61a 挿入部
61b 筒状本体部
61c 引戻部
62 ローラ部
63a アイナット
63c アイナット
201 排水路
201′ 排水路
201a 排水管
202 マンホール
202a 下部開口部
202b 上部開口部
203 マンホール
203a 下部開口部
204 止水プラグ
205 ドラム
206 マンホール
206a 下部開口部
206b 上部開口部
211 引込治具
220 ガイドローラ装置
230 ガイド装置
240 ウインチ
240a ワイヤ
241 滑車
Claims (11)
- 既設管内に、可撓性を有する樹脂管を更生管として引込む更生管引込み方法であって、
上記更生管を模擬したダミー更生管を用意する用意工程と、
上記更生管の引込みが可能かどうかを判定するための判定治具を上記ダミー更生管の挿入側先端部に装着する判定治具装着工程と、
上記既設管内に上記判定治具付きダミー更生管を引込むダミー引込み工程と、
上記判定治具付きダミー更生管の通過完了を確認した後、上記更生管の先端部に引込治具を装着する引込治具装着工程と、
上記引込治具付き更生管を上記既設管の開口部からその既設管内に挿入し、上記引込治具をワイヤで引っ張ることにより、上記既設管全長にわたって上記更生管を配置する配置工程とを含むことを特徴とする更生管引込み方法。 - 上記既設管が、マンホールとマンホールとの間に接続されている排水路であり、
上記引込治具付き更生管を、一方のマンホールの上部開口から搬入し、さらに上記排水路の開口部から上記排水路内に挿入し、上記引込治具を他方のマンホール側からワイヤで引っ張る請求項1に記載の更生管引込み方法。 - 前記更生管引込み方法は、さらに、
上記ダミー更生管の後端部に引戻治具を装着する引戻治具装着工程を含み、
前記ダミー引込み工程において、上記既設管内で上記判定治具付きダミー更生管の引込み不良が発生した際に、上記引戻治具に接続されたワイヤを介して上記判定治具及び引戻治具付きダミー更生管を引き戻す請求項1に記載の更生管引込み方法。 - 上記判定治具は、円錐状の挿入部と、その挿入部の裾部から延設された筒状本体部と、その筒状本体部から縮径して後方に延設され上記ダミー更生管を固定するための筒状固定部とを備える請求項1に記載の更生管引込み方法。
- 上記筒状本体部の外径が上記更生管の外径よりも大きく形成されている請求項4に記載の更生管引込み方法。
- 上記判定治具は、さらに、上記挿入部、及び上記筒状本体部の内部に、捩れ戻し部材を備える請求項1に記載の更生管引込み方法。
- さらに、上記ダミー引込み工程より前に、
上記既設管内に、該既設管内の狭い箇所を検知するための診断治具を通過させる診断工程と、
検知された狭い箇所を掘削して広げる掘削工程とを含む請求項1に記載の更生管引込み方法。 - 前記更生管引込み方法は、さらに、
上記既設管と連通しているマンホールのうち最上流側マンホール近傍上方に上記更生管を巻回したドラムを設置するドラム設置工程と、
上記最上流側マンホールから少なくとも2スパン以上離れた最下流側マンホール上にウインチを設置するウインチ設置工程と、
上記引込治具に上記ウインチから巻き解かれたワイヤを接続する接続工程とを含み、
前記配置工程は、
上記ウインチを巻き取ることにより、2スパン以上の上記既設管内に上記更生管を連続して引込むことを特徴とする請求項1に記載の更生管引込み方法。 - 上記既設管が下水管であり、下水供用下で上記更生管を上記既設管内に引込む請求項8に記載の更生管引込み方法。
- 最上流側マンホールと最下流側マンホールの間に介設されている中間マンホール内を通過している上記更生管については、更生管引込み後にその中間マンホール内壁面に合わせて切断する請求項8に記載の更生管引込み方法。
- 請求項1に記載の更生管引込み方法により更生された管路。
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CN201380007012.0A CN104093919B (zh) | 2012-05-29 | 2013-05-29 | 修复管引入方法和修复后的管道 |
JP2013551450A JP5452789B1 (ja) | 2012-05-29 | 2013-05-29 | 更生管引込み方法及び更生された管路 |
US14/365,216 US8985157B2 (en) | 2012-05-29 | 2013-05-29 | Method for pulling in restoration pipe and restored pipeline |
HK15103411.8A HK1202909A1 (en) | 2012-05-29 | 2015-04-08 | Method for pulling in restoration pipe, and restored pipeline |
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CN110630847A (zh) * | 2019-09-25 | 2019-12-31 | 南方工程检测修复技术研究院 | 一种含多种病害混凝土排水管道的非开挖整体修复方法 |
CN111335448A (zh) * | 2020-04-10 | 2020-06-26 | 济南市市政工程设计研究院(集团)有限责任公司 | 一种倒虹系统及清淤方法 |
CN111536363B (zh) * | 2020-05-12 | 2022-04-01 | 天津市艺智汇科技发展有限公司 | 排水管道快速热熔接管内衬修复工艺 |
CN113418076A (zh) * | 2021-06-21 | 2021-09-21 | 杭州介通电缆保护管有限公司 | 一种地埋管防漏修补方法 |
CN114840935B (zh) * | 2022-04-14 | 2023-07-28 | 深圳市巍特环境科技股份有限公司 | 管道修复方法、装置、设备及存储介质 |
CN115475806A (zh) * | 2022-05-30 | 2022-12-16 | 国网山东省电力公司东明县供电公司 | 一种地埋式电缆管道保护管修复装置 |
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JPWO2013180170A1 (ja) | 2016-01-21 |
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US20140366977A1 (en) | 2014-12-18 |
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