JP3786506B2 - Lining method for existing pipes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In order to rehabilitate an aging existing pipe, the present invention sequentially arranges a strip-like profile along the inner peripheral surface of the existing pipe in a spiral manner and manufactures the helical pipe in the existing pipe. The present invention relates to an existing pipe lining method for lining the inner peripheral surface of a pipe.
[0002]
[Prior art]
Water supply and sewerage systems composed of metal pipes, fume pipes, etc., are subject to aging due to long-term use, and there is a risk of water leakage due to cracks and the like caused by corrosion. For this reason, a method of inserting a synthetic resin pipe into an aging existing pipe and lining the inner peripheral surface of the existing pipe with the synthetic resin pipe has been implemented.
[0003]
An example of such a lining method is disclosed in JP-A-6-190922. In the lining method disclosed in this publication, a profile made of a synthetic resin in the form of a strip and a reinforcing material in the form of a strip are individually supplied, and the profile is set immediately before the profile is wound spirally. Reinforcing materials are sequentially attached to the positions . Then, by winding the profile with the reinforcing material in a spiral shape to form a spiral tube, inserting the formed spiral tube into the existing tube, and filling the backfill material between the existing tube and the spiral tube The inner peripheral surface of the existing pipe is lined. In this way, by attaching a reinforcing material made of a steel plate or the like to the profile of the spiral tube, the strength of the formed spiral tube is remarkably improved, and the backfilling material is provided between the existing tube and the spiral tube. There is no risk that the helical tube will buckle when filled.
[0004]
[Problems to be solved by the invention]
Recently, a lining method has been developed in which profiles are sequentially arranged in a spiral along the inner peripheral surface of an existing pipe, and the spiral pipe is manufactured in the existing pipe. In this case, the profile is left in the existing pipe in a state along the inner peripheral surface of the existing pipe by moving the pipe making machine along the axial direction while rotating in the existing pipe. Therefore, the profile is supplied through the existing pipe to the pipe making machine moving in the existing pipe. In such a case, it is not easy to sequentially attach the reinforcing material inside the narrow existing pipe to the profile supplied to the pipe making machine, and there is a problem that workability is poor.
[0005]
The present invention solves such a problem, and an object of the present invention is to provide an existing pipe lining method capable of remarkably improving the workability when lining an existing pipe with a profile to which a reinforcing material is attached. There is to do.
[0006]
[Means for Solving the Problems]
The lining method for an existing pipe according to the present invention is a strip-shaped reinforcing material that is formed in a W-shaped cross section between a pair of reinforcing ribs that are continuously provided in the longitudinal direction of a strip-shaped profile. Is a profile with a reinforcing material previously mounted by a reinforcing material mounting device having a positioning roller and a pressure roller, and the profile with the reinforcing material is prepared in a state of being wound around a profile drum. A step of arranging the wound profile drum rotatably on the ground surface close to the manhole, and a profile with a reinforcing material from the profile drum wound around the profile drum and rotatably arranged on the ground surface close to the manhole . Sequentially supply into the existing pipe and arrange it spirally along the inner peripheral surface of the existing pipe. Sequentially, characterized in that it comprises the step of producing a helical tube, a.
[0007]
In addition, each side edge portion of the reinforcing material is engaged with a front end portion of a pair of reinforcing ribs provided in the profile to form a profile with a reinforcing material.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view showing one step in an example of an embodiment of an existing pipe lining method according to the present invention. In the existing pipe lining method of the present invention, the sewage pipe 41 which is an old existing pipe disposed between a pair of manholes 42 is rehabilitated. In the sewage pipe 41, a synthetic resin profile 10 having a strip shape is passed through one manhole 42, and a reinforcing member 20 (see FIG. 2) having a W-shaped cross section made of a strip-shaped steel plate is mounted in advance. The pipe making machine 50 disposed in the sewage pipe 41 sequentially arranges along the inner peripheral surface of the sewage pipe 41 to form a spiral pipe 10a. The profile 10 is prepared in a state in which the reinforcing material 20 is attached throughout and wound around the profile drum 31. The profile drum 31 around which the profile with reinforcing material 10 is wound is rotatably arranged on the ground surface close to one manhole 42.
[0009]
FIG. 2 is a cross-sectional view of the profile 10 with the reinforcement 20 engaged. The profile 10 has a band plate-shaped main body substrate 11, and a fitting protrusion 12 extending continuously in the longitudinal direction is provided at an appropriate interval from one side edge of the main body substrate 11. Yes. The fitting protrusion 12 is raised perpendicularly to the surface of the main body substrate 11, and an engaging portion 12 a having a semispherical cross section is continuously provided in the longitudinal direction at the tip portion.
[0010]
The side edge portion on the opposite side to the side edge of the main body substrate 11 to which the fitting protrusion 12 is close becomes a stepped portion 13 that has dropped to the protruding side of the fitting protrusion 12 by the thickness of the main body substrate 11. The main body substrate 11 is spirally wound around the stepped portion 13 so that the side edge portion provided with the fitting protrusion 12 of the adjacent main body substrate 11 can be fitted. It has become. In the stepped portion 13, a fitting recess 14 in which a semicircular cross-sectional space into which the fitting protrusion 12 provided on the side edge of the main body substrate 11 to be fitted is fitted is formed in the longitudinal direction. Is provided. A flange portion 14 a parallel to the main body substrate 11 is provided on the outer peripheral surface of the fitting recess 14 on the protruding side. The fitting recess 14 is provided with an inclined rib 15 that is inclined so as to be positioned on the protruding side of the fitting recess 14 as the distance from the body substrate 11 increases. The one side edge of is formed.
[0011]
A pair of reinforcing ribs 16, which are continuous in the longitudinal direction, are provided on the surface of the main body substrate 11 between the fitting protrusion 12 and the stepped portion 13 at an appropriate interval. Each reinforcing rib 16 protrudes vertically from the surface of the main body substrate 11 in the same direction as the fitting protrusion 12. The front ends of the reinforcing ribs 16 are in a state of protruding to the respective sides in parallel with the main body substrate 11. The ends of the reinforcing ribs 16 arranged adjacent to the fitting ridge 12 are in a state of protruding largely toward the fitting ridge 12, and the fitting ridge 12 is fitted into the fitting recess 14 at the protruding portion. When fitted inside, the tip end portion of the inclined rib 15 provided continuously to the fitting recess 14 is engaged.
[0012]
On the surface of the main body substrate 11 close to the fitting protrusion 12, a band-like waterstop 17 of the fitting protrusion 12 is continuously provided in the longitudinal direction. When the fitting protrusion 12 and the fitting concave portion 14 are fitted to each other and the leading end of the inclined rib 15 is engaged with the leading end of the reinforcing rib 16, The portion between the fitting recess 14 and the main body substrate 11 is press-contacted.
[0013]
Such a profile 10 is made of synthetic resin such as polyvinyl chloride, polyethylene, polypropylene, polycarbonate, polyester, etc., for example, the distance from the center of the fitting protrusion 12 to the center of the fitting recess 14 is 79 mm, The thickness is 3.4 mm, and the distance from the back surface of the main body substrate 11 to the tip of each reinforcing rib 16 is 21.5 mm.
[0014]
Between the pair of reinforcing ribs 16 in the profile 10, a band-shaped reinforcing material 20 continuous in the longitudinal direction is mounted. The reinforcing member 20 is formed by bending a strip-shaped steel plate that is continuous in the longitudinal direction so that the central portion in the width direction has an acute angle, and the intermediate position between each side edge and the central portion in the width direction is set at the center in the width direction. It is formed into a W-shaped cross section by being bent at an acute angle so as to protrude in a direction opposite to the bent portion of the portion. Each side edge portion of the reinforcing member 20 is engaged with the distal end portions of a pair of reinforcing ribs 16 provided in the profile 10 and is integrally attached to the profile 10.
[0015]
The profile 10 with the reinforcing material 20 mounted at a predetermined position is prepared in a state of being wound around the profile drum 31. For example, as shown in FIG. 3, the reinforcing material 20 is a profile 10 in which a profile 10 in a state where the reinforcing material 20 is extruded into a predetermined cross-sectional shape by an extrusion molding apparatus and wound around the winding drum 32 is fed out from the winding drum 32. On the other hand, the reinforcing material mounting device 60 is mounted at a predetermined position. The reinforcing member 20 is formed in a predetermined cross-sectional shape over an appropriate length, and is stored in a state of being wound in the reinforcing member storage container 33. The profile 10 on which the reinforcing material 20 is mounted by the reinforcing material mounting device 60 is wound around the profile drum 31.
[0016]
FIG. 4 is a front view showing a part of the main part of the reinforcing material mounting device 60 in a broken state. The reinforcing material mounting device 60 includes a positioning roller 61 that is engaged with the profile 10 in a positioning state, and a pressure roller 62 that is disposed to face the positioning roller 61. The profile 10 and the reinforcing material 20 pass between the pressure roller 62.
[0017]
The pressure roller 62 is configured by attaching a roll main body 62b having a constant outer diameter to a roll shaft 62a, and the outer peripheral surface of the roll main body 62b is brought into rolling contact with the back surface of the main body substrate 11 in the profile 10. It has become.
[0018]
The positioning roller 61 is configured by attaching a roll body 61b to a roll shaft 61a. The roll body 61b is composed of seven roll parts, a first roll part 61c to a seventh roll part 61k, which are arranged side by side in the axial direction. The first roll portion 61c located at one end of the roll body 61b is provided with a recess 61m in the outer peripheral portion thereof into which the fitting protrusion 12 of the profile 10 is fitted. It is configured to be pressed against the surface of the main body substrate 12 on both sides of the joint protrusion 12. The second roll portion 61d disposed adjacent to the first roll portion 61c is fixed so as to be in pressure contact with the tip end portion of one reinforcing rib 16 disposed adjacent to the fitting protrusion 12 in the profile 10. It has the outer peripheral surface of the outer diameter. The outer peripheral surface of the second roll portion 61d is knurled over the entire circumference.
[0019]
The third roll portion 61e disposed adjacent to the second roll portion 61d is fitted with a bent portion at the center in the width direction of the reinforcing member 20 having a W-shaped cross section that is mounted between the pair of reinforcing ribs 20 in the profile 10. A groove having a V-shaped cross section is provided on the outer peripheral surface. The fourth roll portion 61f disposed adjacent to the third roll portion 61e is fixed so as to be pressed against the tip of the other reinforcing rib 16 disposed adjacent to the fitting recess 14 in the profile 10. The outer peripheral surface has an outer diameter. The outer peripheral surface of the fourth roll portion 61f is knurled over the entire circumference.
[0020]
The fifth roll portion 61g disposed adjacent to the fourth roll portion 61f is pressed between the inclined portion between the stepped portion 13 and the main body substrate 11 in the profile 10. A part of the outer peripheral surface is inclined. The 6th roll part 61h arrange | positioned adjacent to the 5th roll part 61g has the outer peripheral surface of a fixed outer diameter so that it may press-contact with the flange part 14a of the fitting recessed part 14 in the profile 10. FIG. The outer peripheral surface of the sixth roll portion 61h is knurled over the entire circumference.
[0021]
Furthermore, the 7th roll part 61k arrange | positioned adjacent to the 6th roll part 61h is located in the other edge part of the roll main body 61b, and between the fitting recessed part 14 and the inclination rib 15 in the profile 10 is. The outer peripheral surface portion has a constant outer diameter so as to be pressed against the surface of the stepped portion 13, and the outer peripheral surface portion is inclined so as to be pressed against the surface of the inclined rib 15.
[0022]
The positioning roll 61 and the pressure roll 62 arranged to face each other have a width dimension of the profile drum 31 in synchronization with the winding speed of the profile drum 31 on which the profile 10 on which the reinforcing material 20 is mounted is wound. It is designed to reciprocate along the axial direction integrally over an equal distance.
[0023]
In such a reinforcing material mounting device 60, the reinforcing material 20 having a W-shaped cross section is mounted in a predetermined state between the pair of reinforcing ribs 16 at the end of the profile 10, and the positioning roll 61 is added. Inserted between the pressure roll 62 and each roll portion of the positioning roll 61 is brought into contact with a predetermined position of the profile 10. Then, the end portion of the profile 10 to which the reinforcing material 20 is attached is wound around the profile drum 31.
[0024]
In this state, the positioning roll 61 and the pressure roll 62 are rotated at the same speed in the same direction, and the profile drum 31 is rotationally driven so as to wind up the profile 10 at a predetermined speed. As a result, the profile 10 inserted between the positioning roll 61 and the pressure roll 62 is positioned between the positioning roll 61 and the pressure roll 62 at a constant speed by each roll portion of the positioning roll 61. Pass in state. Then, while the profile 10 passes between the positioning roll 61 and the pressure roll 62, the reinforcing material 20 is fitted to the third roll portion 61 e of the positioning roll 61 and the pair of reinforcements of the profile 10. By sequentially pushing between the ribs 16, the side edges of the reinforcing material are respectively engaged with the reinforcing ribs 16. Then, the profile 10 in which the reinforcing member 20 is mounted between the reinforcing ribs 16 is wound around the profile drum 31.
[0025]
At this time, the positioning roll 61 and the pressure roll 62 are reciprocated over a distance equal to the width dimension of the profile drum 31 in synchronization with the winding speed of the profile 10 with the reinforcing material by the profile drum 31. The profile 10 to which 20 is attached is wound along the entire width direction of the profile drum 31.
[0026]
In this way, when the reinforcing material 20 is mounted at a predetermined position of the profile 10 and wound around the profile drum 31 by the reinforcing material mounting device 60, the profile drum 31 has one of the profiles drum 31 as shown in FIG. It is rotatably arranged on the ground surface close to the manhole 42. Then, the profile 10 to which the reinforcing member 20 is attached is sequentially drawn out from the profile drum 31 and supplied into the sewer pipe 41 through the manhole 42. In the sewage pipe 41, a self-propelled pipe making machine 50 is disposed. While the pipe making machine 50 is self-propelled from one end of the sewer pipe 41 toward the other end, The profile 10 with the reinforcing material supplied into the sewage pipe 41 is spirally arranged along the inner peripheral surface of the sewage pipe 41 by the pipe making machine 50, and the adjacent fitting protrusions 12 and fitting recesses are adjacent to each other. 14 are fitted to each other to form a spiral tube 10a.
[0027]
The self-propelled pipe making machine 50 arranged in the sewage pipe 41 is driven by a hydraulic unit 51 arranged in the sewage pipe 41, and the hydraulic unit 51 arranged in the sewage pipe 41. Electricity is supplied from the power source vehicle 52. The power supply wheel 52 is arranged on the ground surface close to the manhole 42 different from the manhole 42 into which the profile 10 with the reinforcing material is inserted.
[0028]
Each roll part of the positioning roll 61 in the reinforcing material mounting device 60 can be attached to and detached from the roll shaft 62. When the cross-sectional shapes of the profile 10 and the reinforcing material 20 are changed, the changed cross-sectional shape is obtained. It can be replaced with various types of rolls.
[0029]
The reinforcing member 20 is attached at a predetermined position corresponding to the cross-sectional shape of the profile 10. Further, if necessary, a plurality of reinforcing members 20 may be attached to the profile 10. For example, as shown in FIG. 5, the fitting recess 14 in the profile 10 and the reinforcing rib 16 adjacent to the fitting recess 14 Further, a reinforcing member 20 having a W-shaped cross section may be engaged between the two. In this case, the fifth roll portion 61 g of the positioning roll 61 in the reinforcing material mounting device 60 can be replaced with a shape corresponding to the reinforcing material 20. Accordingly, the pair of reinforcing members 20 are simultaneously mounted on the profile 10 by the reinforcing member mounting device 60.
[0030]
Further, the profile 10 in the above embodiment has a configuration in which the spiral side tube 10a is formed by mutually engaging adjacent side edges when wound in a spiral shape. For example, as shown in FIGS. 6A and 6B, when the profile 10 is spirally wound, adjacent side edges are connected separately from the profile 10. The spiral tube 10a may be formed by connecting with the member 19. In this case, a plurality of reinforcing ribs 16 having a T-shaped cross section are continuously provided in the longitudinal direction at appropriate intervals in the width direction on the surface of the strip-shaped body substrate 11 in the profile 10. Each side edge of the main body substrate 11 protrudes perpendicularly in the same direction as each reinforcing rib 16, protrudes at a right angle to each side at the protrusion direction tip, and further perpendicularly at the protrusion direction tip. Locking grooves 18 projecting at right angles to the main body 11 side are respectively provided continuously in the longitudinal direction. Locking portions 18a projecting inward are provided at the end portions of the side edge portions located on the outer sides of the locking grooves 18, respectively. The outer side edge portions of the respective locking grooves 18 are brought into contact with each other when being wound spirally.
[0031]
The connecting member 19 is configured in a band shape having a U-shaped cross section, and each side edge portion is fitted into each locking groove 18 in contact with each other of the profile 10 wound spirally. To get. Then, at the front end portion of each side edge portion of the connecting member 19 , a locking portion 19a that locks to a locking portion 18a provided at the front end of each side edge portion that is located outside the locking groove 18, respectively. Is provided.
[0032]
In the center of the profile body 10 in the width direction of the substrate body 11, a reinforcing member 20 having a W-shaped cross section is sandwiched between the pair of reinforcing ribs 16 and the side edges are locked to the reinforcing ribs 16. It is designed to be engaged. In the profile 10 having such a configuration, the reinforcing member 20 is attached to the profile 10 in advance by the reinforcing member attaching device 60.
[0033]
In the above-described embodiment, the profile 10 formed in a predetermined cross-sectional shape is wound around the winding drum 32 and then wound around the profile drum 31 so that the reinforcing member 20 is attached to the profile 10. However, as shown in FIG. 7, the profile 10 extruded into a predetermined cross-sectional shape by the extruder 35 is directly coupled with the reinforcing material 20 between the positioning roll 61 and the pressure roll 62 in the reinforcing material mounting device 60. The reinforcing material 20 may be attached to the profile 10 through the gap. Further, as shown in FIG. 8, the reinforcing material 20 molded into a predetermined cross-sectional shape by the reinforcing material molding machine 36 together with the profile 10 extruded by the extrusion molding machine 35 is directly positioned by the reinforcing material mounting device 60. The reinforcing member 20 may be attached to the profile 10 by passing between the roll 61 and the pressure roll 62.
[0034]
【The invention's effect】
As described above , the existing pipe lining method of the present invention is continuous in the longitudinal direction formed in a W-shaped cross section between a pair of reinforcing ribs continuously provided in the longitudinal direction of the strip-like profile. The band-shaped reinforcing material is made into a profile with a reinforcing material previously mounted by a reinforcing material mounting device having a positioning roller and a pressure roller, and this reinforcing material profile is prepared in a state of being wound around a profile drum. A profile drum around which a profile with a material is wound is rotatably arranged on the ground surface near the manhole, and a profile with a reinforcing material is sequentially supplied from the profile drum into the existing pipe to the inner peripheral surface of the existing pipe. by arranging in a spiral shape along at existing pipe, successively, to adapted to produce a spiral tube, the narrow existing pipe There is no need to implement the operation of attaching the reinforcing member in a spiral tube, the workability is significantly improved.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of an implementation process of an existing pipe lining method according to the present invention.
FIG. 2 is a cross-sectional view showing an example of a profile to which a reinforcing material used in the lining method is attached.
FIG. 3 is a schematic view showing an example of a step of attaching a reinforcing material to a profile.
FIG. 4 is a front view of a main part of a reinforcing material mounting apparatus used when a reinforcing material is mounted on a profile.
FIG. 5 is a cross-sectional view showing another example of a profile to which a reinforcing material used in the lining method of the present invention is attached.
FIG. 6A is a cross-sectional view showing still another example of a profile to which a reinforcing material used in the lining method of the present invention is attached, and FIG. 6B is a perspective view of an essential part thereof.
FIG. 7 is a schematic view showing another example of a step of attaching a reinforcing material to a profile.
FIG. 8 is a schematic view showing still another example of a step of attaching a reinforcing material to a profile.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Profile 10a Spiral tube 11 Main body board | substrate 12 Fitting protrusion 13 Step drop part 14 Fitting recessed part 15 Inclination rib 16 Reinforcement rib 20 Reinforcement material 31 Profile drum 32 Take-up drum 41 Sewage pipe 50 Pipe making machine 60 Reinforcement material mounting apparatus 61 Positioning roll 62 Pressure roll

Claims (2)

Between a pair of reinforcing ribs provided continuously in the longitudinal direction of the strip-like profile, a longitudinal reinforcing strip formed in a W-shaped cross section has a positioning roller and a pressure roller. A profile with a reinforcing material that has been pre-mounted by the reinforcing material mounting device is prepared in a state where the profile with the reinforcing material is wound around the profile drum, and the profile drum on which the profile with the reinforcing material is wound is close to the manhole. A step with a rotational arrangement on the ground surface and a profile with a reinforcing material are sequentially fed into the existing pipe from the profile drum wound around the profile drum and arranged on the ground surface close to the manhole. In the existing pipe, by sequentially arranging the spiral pipe along the inner peripheral surface of the pipe,
An existing pipe lining method characterized by including The existing pipe lining method according to claim 1, wherein each side edge portion of the reinforcing material is engaged with a tip portion of a pair of reinforcing ribs provided in the profile to form a profile with a reinforcing material.

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