JP5320262B2 - Connection structure and connection method between manhole and composite pipe - Google Patents

Description

  The present invention relates to a connection structure between a manhole and a composite pipe and a connection method thereof.

  Conventionally, in order to rehabilitate an aging existing pipe, a belt-like member 100 having joints 101 (concave grooves 103) and 102 (protrusions 104) formed on both side ends is supplied into the existing pipe, and the belt-like member 100 is provided. Are spirally wound, and the joint groove 103 and the joint protrusion 104 of the adjacent belt member 100 are joined to each other to form a rehabilitation pipe, and the rehabilitation pipe is newly supplied to add the rehabilitation pipe. Forming is carried out (see FIG. 14 and FIG. 15).

  For example, as described in Patent Documents 1 and 2, a pipe making machine is installed in an existing pipe, and a transport winding body in which a belt-like member is wound in a hollow cylindrical shape is installed on the ground. The strip-shaped member drawn out in a spiral shape is supplied to a pipe-making machine in the existing pipe, and the pipe-making machine is rotated around the axis of the existing pipe to join the joint portions of the adjacent band-shaped members together to produce a regenerated pipe. A strip-shaped member is newly supplied to a rehabilitated pipe that has been piped and manufactured without rotation, and the rehabilitated pipe is additionally formed in the axial direction of the existing pipe. A gap between the outer peripheral surface of the rehabilitated pipe and the inner peripheral surface of the existing pipe is filled with a filler such as mortar to form a composite pipe integrated with the existing pipe.

  By the way, when ground changes occur due to an earthquake or the like, the existing pipe may be displaced with respect to the manhole, and in that case, it becomes difficult to ensure the water stop performance of the connecting portion between the manhole and the existing pipe. .

  Here, a lining pipe made of a thermoplastic resin is closely attached to the inner peripheral surface of the existing pipe to form a rehabilitation pipe, and when the existing pipe is rehabilitated by the rehabilitation pipe, an extensible part that can be extended in the radial direction is formed. A water stop member with a flange is arranged between the inner wall surface of the manhole and the inner peripheral surface of the rehabilitation pipe, so that the displacement of the existing pipe due to earthquakes and the rehabilitation pipe can be displaced independently of the existing pipe. On the other hand, the invention which ensured the water stop performance is proposed (for example, refer patent document 3).

Japanese Patent No. 3072015 Japanese Patent No. 3035466 JP 2008-248602 A

  However, in the water-stopping member with a part that can be extended, one end of the water-stopping member is fixed to the inner peripheral surface of the rehabilitation pipe via a diameter expansion ring. It will reduce the ability. In addition, the extensible part of the water stop member can absorb the displacement of the rehabilitating pipe with respect to the manhole, but it may not be able to reliably absorb the displacement of the rehabilitating pipe with respect to the manhole and the displacement due to bending. is there.

  Furthermore, the water flow in the pipe is a natural flow due to a water gradient, and if the existing pipe falls out of the manhole due to ground deformation such as an earthquake, or if their connection part is damaged, the internal water pressure in the pipe where there is almost no pressure Since the external water pressure having a high water pressure is damaged by the groundwater level and acts on the water-stopping member through crushing the water-stopping member to greatly reduce the cross-sectional area, it is impossible to ensure the flow-down capability. In addition, if the existing pipe falls off the manhole, the pipe end of the existing pipe contacts the water stop member, and the water stop member may be damaged, cut, and leaked by repeated movement of the existing pipe due to aftershocks, etc. There is also. Furthermore, an invert is usually formed at the bottom of the manhole in order to secure running water and communicates with an existing pipe. Interferes with invert and the extendable part cannot function. For this reason, a water stop member cannot be adopted for an existing manhole having an invert.

  The present invention has been made in view of such problems. Even in the case of an existing manhole having an invert, the manhole and the composite can be prevented against the displacement of the existing pipe and the composite pipe integrated with the existing pipe due to an earthquake or the like. The present invention provides a connection structure between a manhole and a composite pipe that can be connected to a pipe while maintaining water-stopping performance, and a method for connecting the structure.

  The connection structure between a manhole and a composite pipe according to the present invention is a connection structure between a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of an existing pipe buried in the ground over an adjacent manhole, The pipe is remanufactured in the existing pipe, and the rehabilitation pipe is formed to protrude into the manhole by a set length, and the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the renovated pipe in the existing pipe and the manhole protrudes. In a manhole formed from an inner peripheral surface of a cylindrical body inserted on the outer peripheral surface side of the rehabilitated pipe and a filler filled across a gap between the outer peripheral surface of the rehabilitated pipe in the cylindrical body and inverted A flexible water-proof material having a displacement absorbing portion is inserted into the outer peripheral surface of the cylindrical body of the composite pipe formed to protrude to the set length, and the flange-like one end and the tubular other end of the flexible water-proof material are Manho Cushion material is fixed to the inner wall surface of the barrel and the outer peripheral surface of the cylinder in a sealed state, and a cushion material covering the lower half of the outer peripheral surface side of the flexible waterproof material is disposed at the bottom of the manhole, and the cushion material is restored. It is characterized by being embedded in the inverted invert.

  According to the present invention, the water flow cross-sectional area of the composite pipe is reduced by fixing the flexible water-proof material in a sealed state over the outer peripheral surface of the composite pipe protruding in the manhole and the inner wall surface of the manhole. Even if the connecting part between the manhole and the existing pipe is damaged and the external water pressure acts on the flexible water-stopping material through the damaged part, the water-stopping performance is ensured. And does not affect the flow capacity of the composite pipe.

  In addition, even if the existing pipes drop off from the manhole due to ground deformation such as an earthquake, or their connecting parts are broken out, protruding, or bent, the outer peripheral surface of the composite pipe and the manhole The displacement absorbing portion of the flexible water-stopping material fixed over the inner wall surface follows and deforms, and can easily absorb various displacements.

  Furthermore, by covering the substantially lower half of the outer peripheral surface side of the flexible water-stopping material and arranging the cushion material to restore the invert, it is possible to stably secure the flow-down ability by the invert, and the cushion material It is possible to protect the flexible water stop material and ensure the deformation of the displacement absorbing portion. Therefore, when the composite pipe that is integral with the existing pipe is projected due to an earthquake, etc., and the flexible water-stopping material fixed to the composite pipe follows the projection of the composite pipe, the displacement absorbing portion is deformed while compressing and deforming the cushion material. Can be absorbed. Further, when the composite pipe is pulled out and the flexible water blocking material fixed to the composite pipe follows the composite pipe, the displacement absorbing portion can be deformed and absorbed.

  As a result, it is possible to connect the manhole and the composite pipe while maintaining the water-stopping performance against the displacement of the existing pipe and the composite pipe that rehabilitates the existing pipe due to an earthquake or the like.

  The connection structure between a manhole and a composite pipe according to the present invention is a connection structure between a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of an existing pipe buried in the ground over an adjacent manhole, The pipe is remanufactured in the existing pipe, and the rehabilitation pipe is formed to protrude into the manhole by a set length, and the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the renovated pipe in the existing pipe and the manhole protrudes. In a manhole formed from an inner peripheral surface of a cylindrical body inserted on the outer peripheral surface side of the rehabilitated pipe and a filler filled across a gap between the outer peripheral surface of the rehabilitated pipe in the cylindrical body and inverted A flexible water-proof material having a displacement absorbing portion is inserted into the outer peripheral surface of the cylindrical body of the composite pipe formed to protrude to the set length, and the flange-like one end and the tubular other end of the flexible water-proof material are Manho A cover material is disposed on the inner wall surface of the cylinder and the outer peripheral surface of the cylinder in a sealed state, and covers a displacement absorbing portion of the flexible waterproof material over the entire circumference. It is embedded in the restored invert.

  According to the present invention, the water flow cross-sectional area of the composite pipe is reduced by fixing the flexible water-proof material in a sealed state over the outer peripheral surface of the composite pipe protruding in the manhole and the inner wall surface of the manhole. Even if the connecting part between the manhole and the existing pipe is damaged and the external water pressure acts on the flexible water-stopping material through the damaged part, the water-stopping performance is ensured. And does not affect the flow capacity of the composite pipe.

  In addition, even if the existing pipes drop off from the manhole due to ground deformation such as an earthquake, or their connecting parts are broken out, protruding, or bent, the outer peripheral surface of the composite pipe and the manhole The displacement absorbing portion of the flexible water-stopping material fixed over the inner wall surface follows and deforms, and can easily absorb various displacements.

  Furthermore, by arranging a cover material that covers the displacement absorbing portion of the flexible waterproof material over the entire circumference and restoring invert, it is possible to stably secure the flow ability by invert, and in the cover material, It is possible to protect the flexible water stop material and ensure the deformation of the displacement absorbing portion. Therefore, when the composite pipe integrated with the existing pipe is pulled out due to an earthquake or the like, and the flexible waterproof material fixed to the composite pipe follows the composite pipe, the displacement absorbing portion of the flexible waterproof material is deformed. Can be absorbed. Further, when the composite pipe protrudes and the flexible water-proof material fixed to the composite pipe follows the protrusion of the composite pipe, the displacement absorbing portion of the flexible water-proof material can be deformed and absorbed.

  As a result, it is possible to connect the manhole and the composite pipe while maintaining the water-stopping performance against the displacement of the existing pipe and the composite pipe that rehabilitates the existing pipe due to an earthquake or the like.

  In the present invention, one end of the flange of the flexible water-stopping material is fixed via an adhesive anchor bolt, a presser plate and a nut fixed to the peripheral wall of the manhole, and the other end of the tubular is the outer peripheral surface of the cylinder. It is preferable to be fixed to a fixing band or a plurality of fixing plates. Thereby, a flexible waterproofing material can be secured and secured easily over the outer peripheral surface of the composite tube and the inner wall surface of the manhole. In addition, even if a crack or the like occurs on the peripheral wall of the manhole due to an earthquake, etc., and external water pressure acts on the bolt hole through the crack, the water should be reliably stopped without leaking into the manhole through the bolt hole by the adhesive. Can do.

  A method for connecting a manhole and a rehabilitation pipe according to the present invention is a method of connecting a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of an existing pipe buried in the ground over an adjacent manhole, After inverting the manhole that communicates with the existing pipe, the rehabilitation pipe is produced by projecting the set length into the existing pipe and the manhole, and then on the outer surface of the rehabilitation pipe protruding into the manhole. The cylinder is inserted and filled with the filler over the gap between the inner circumference of the existing pipe and the outer circumference of the rehabilitation pipe in the existing pipe and the gap between the inner circumference of the cylinder and the outer circumference of the rehabilitation pipe in the cylinder. Then, a flexible water-proof material having a displacement absorbing portion is fitted on the outer peripheral surface side of the cylindrical body in the composite tube, and one end of the flange is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the cylindrical body. On the outer surface Then, after covering the substantially lower half of the outer peripheral surface side of the flexible water-proofing material and disposing the cushioning material at the bottom of the manhole, the concrete is cast to embed the cushioning material and restore the invert. It is characterized by this.

  According to the present invention, after inverting a manhole communicated with an existing pipe to be rehabilitated, the rehabilitation pipe is formed in the existing pipe, and further, the rehabilitation pipe is continuously projected by projecting a set length into the manhole. Pipe making. Next, after inserting the cylindrical body into the outer peripheral surface side of the rehabilitating pipe protruding into the manhole, the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the rehabilitating pipe in the existing pipe, and the inner peripheral surface of the cylindrical body and the cylinder Filling material is filled across the gap between the outer peripheral surface of the rehabilitation tube in the body. Next, a flexible water-stopping material having a displacement absorbing portion is fitted on the outer peripheral surface side of the tubular body in the rehabilitation pipe, and one end of the flange is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the outer periphery of the tubular body. Secure to the surface. Next, a cushioning material is disposed at the bottom of the manhole so as to cover the substantially lower half of the outer peripheral surface side of the flexible waterstop material. After that, concrete is cast to bury the cushioning material, and the invert is restored.

  As a result, it is possible to efficiently connect the manhole and the composite pipe while maintaining the water stopping performance against the displacement of the existing pipe and the composite pipe that rehabilitates the existing pipe due to an earthquake or the like.

  A method for connecting a manhole and a rehabilitation pipe according to the present invention is a method of connecting a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of an existing pipe buried in the ground over an adjacent manhole, After inverting the manhole that communicates with the existing pipe, the rehabilitation pipe is produced by projecting the set length into the existing pipe and the manhole, and then on the outer surface of the rehabilitation pipe protruding into the manhole. The cylinder is inserted and filled with the filler over the gap between the inner circumference of the existing pipe and the outer circumference of the rehabilitation pipe in the existing pipe and the gap between the inner circumference of the cylinder and the outer circumference of the rehabilitation pipe in the cylinder. Then, a flexible water-proof material having a displacement absorbing portion is fitted on the outer peripheral surface side of the cylindrical body in the composite tube, and one end of the flange is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the cylindrical body. On the outer surface Next, after covering the entire circumference of the displacement absorbing portion of the flexible water-stopping material and disposing the cover material, placing the concrete to bury the substantially lower half of the cover material and restoring the invert It is characterized by.

  According to the present invention, after inverting a manhole communicated with an existing pipe to be rehabilitated, the rehabilitation pipe is formed in the existing pipe, and further, the rehabilitation pipe is continuously projected by projecting a set length into the manhole. Pipe making. Next, after inserting the cylindrical body into the outer peripheral surface side of the rehabilitating pipe protruding into the manhole, the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the rehabilitating pipe in the existing pipe, and the inner peripheral surface of the cylindrical body and the cylinder Filling material is filled across the gap between the outer peripheral surface of the rehabilitation tube in the body. Next, a flexible water-stopping material having a displacement absorbing portion is fitted on the outer peripheral surface side of the tubular body in the rehabilitation pipe, and one end of the flange is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the outer periphery of the tubular body. Secure to the surface. Next, a cover material that covers the entire circumference of the displacement absorbing portion of the flexible water blocking material is disposed over the outer peripheral surface of the composite pipe and one end of the flange shape of the flexible water blocking material. Thereafter, concrete is cast to bury the substantially lower half of the cover material, and the invert is restored.

  As a result, the manhole and the composite pipe can be efficiently connected while maintaining the water stop performance against the displacement of the existing pipe due to an earthquake or the like and the rehabilitation pipe rehabilitating the existing pipe.

  According to the present invention, even in an existing manhole having an invert, the manhole and the composite pipe are connected to each other while maintaining the water-stopping property against the displacement of the existing pipe and the composite pipe integrated with the existing pipe due to an earthquake or the like. be able to.

It is a top view which shows one Embodiment of the connection structure of the manhole of this invention, and a composite pipe. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is a half sectional view showing a flexible waterproof material. It is a perspective view which shows the external shape of the cushion material shape | molded previously. It is process drawing explaining the construction point of the connection structure of FIG. It is process drawing explaining the construction point of the connection structure of FIG. It is CC sectional view taken on the line of FIG. It is the X section enlarged view of FIG. It is a front view which abbreviate | omits and shows some other embodiment of the connection structure of the manhole of this invention, and a composite pipe. It is the DD sectional view taken on the line of FIG. It is the EE line expanded sectional view of FIG. It is a principal part enlarged view which shows another embodiment of the connection structure of the manhole and composite pipe of this invention. It is sectional drawing which shows an example of the strip | belt-shaped member which manufactures a rehabilitation pipe | tube. It is sectional drawing explaining the joining process of the strip | belt-shaped member of FIG. It is sectional drawing which shows the other strip | belt-shaped member and connector which manufacture a rehabilitation pipe | tube. It is a disassembled perspective view explaining the joining process of the strip | belt-shaped member of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment of a connection structure between a manhole and a composite pipe according to the present invention.

  This connection structure is fitted on the outer peripheral surface of a composite pipe 3 that rehabilitates an existing pipe 2 such as a fume pipe that is connected across adjacent manholes 1 and a composite pipe 3 that protrudes in a set length in the manhole 1. 1 is a flexible water-proof material 4 with each end fixed to the inner wall surface of the composite pipe 3 and the outer peripheral surface tip of the composite pipe 3, and a cushion material 7 that covers a substantially lower half of the outer surface of the flexible water-proof material 4. The cushion material 7 is embedded in the restored invert 1a of the manhole 1, and the lower half portion of the inner peripheral surface of the composite pipe 3 is communicated.

  As described above, the composite pipe 3 is a mortar filled in the gap between the rehabilitated pipe 31 formed by spirally winding a belt-shaped member and the inner peripheral surface of the existing pipe 2 and the outer peripheral surface of the regenerated pipe 31. And the like, and is integrated with the existing pipe 2.

  Here, the rehabilitation pipe 31 protrudes into the manhole 1 with a set length from the existing pipe 2, and the upper half of the protrusion 311 is cut off. Thereby, when the cushion material 7 to be described later is disposed, the outer peripheral surface side substantially lower half of the protruding portion 311 of the rehabilitated pipe 31 that protrudes from the flexible water blocking material 4 that is inserted into the composite pipe 3. It can arrange | position to a part and can support the outer peripheral surface side substantially lower half part of the flexible water-proof material 4 reliably.

  As shown in FIG. 4, the flexible water blocking material 4 is continuous with the flange-shaped one end 41, the tubular other end 42, the flange-shaped one end 41, and the tubular other end 42, and has a cross section over the entire circumference. It consists of a substantially Z-shaped displacement absorbing portion 43 and is integrally formed of rubber or synthetic resin that is not affected by hydrogen sulfide generated in a sewer pipe or the like. A plurality of anchor bolt mounting holes 41a are formed in the flange-shaped one end portion 41 of the flexible water blocking material 4 at intervals in the circumferential direction, and the outer periphery of the anchor bolt mounting holes 41a is formed on the outer surface thereof. A plurality of water stopping protrusions 411 are formed in a circumferential shape on the side and the inner peripheral side. Further, a retaining flange 421 for preventing the fixing band 5 to be pulled out later is formed on the outer peripheral surface of the distal end of the tubular other end portion 42 of the flexible water-proof material 4, and an axial line is formed on the inner peripheral surface thereof. A plurality of water stop protrusions 422 are formed over the entire circumference at intervals in the direction. Further, the flange-like one end 41 and the tubular other end 42 of the flexible water-proof material 4 are formed on end faces orthogonal to the axis, and are fixed to the inner wall surface of the manhole 1 via an adhesive anchor bolt. At the same time, it is fixed to the outer peripheral surface of the composite pipe 3 through a fixing band 5.

  The cushion material 7 is provided to prevent the concrete placed for restoring the invert 1a from coming into contact with the flexible water-proof material 4 and to allow the displacement absorbing portion 43 to be deformed. It is formed by the foam. Specifically, the cushion material 7 is a foamed material obtained by foaming foamed plastic by foaming in the field, and is a flexible water-proof material that is fitted and fixed to the composite pipe 3 having a set length protruding into the manhole 1. 4 is formed so as to cover the substantially lower half of the outer peripheral surface side of the outer peripheral surface side of the protruding portion 311 of the rehabilitating pipe 31 that protrudes inward from the flexible waterproofing material 4. is there.

  In this case, as the cushion material 7, a substantially lower half portion on the outer peripheral surface side of the flexible water blocking material 4, the protruding portion 311 of the rehabilitated tube 31 protruding further inward than the composite tube 3 protruding into the manhole 1. In the manhole 1, the length corresponding to the length of the flexible water-proof material 4 and the stepped inner peripheral surface corresponding to the substantially lower half of the outer peripheral surface are covered so as to cover the substantially lower half of the outer peripheral surface. The section corresponding to the length of the protruding portion 311 of the rehabilitated pipe 31 protruding from the protruding composite pipe 3 and the inner length of the outer peripheral surface side of the inner peripheral surface corresponding to the substantially lower half of the section are substantially concave. It may be formed in advance in a letter-shaped block body (see FIG. 5).

  The shape of the cushion material 7 is not particularly limited. For example, the cushion material 7 may be formed in a substantially semicircular tubular outer surface shape instead of a substantially rectangular parallelepiped outer surface shape.

  Here, the adhesive anchor bolt that fixes the flange-shaped one end portion 41 of the flexible water-proof material 4 to the inner wall surface of the manhole 1 is formed on the flange-shaped one end portion 41 of the flexible water-proof material 4 on the peripheral wall of the manhole 1. Bolt holes are formed corresponding to the bolt mounting holes 41a, and the anchor bolts 5 are fixed to the bolt holes with an adhesive. As a result, cracks and the like are generated in the peripheral wall of the manhole 1 due to an earthquake and the like, and even if external water pressure acts on the bolt hole through the crack, the adhesive leaks into the manhole 1 through the bolt hole. There is no such thing and water can be reliably stopped.

  The fixing band 6 for fixing the tubular other end 42 of the flexible water-proof material 4 to the outer peripheral surface of the composite pipe 3 is not shown in detail, but nuts and nuts are provided at both ends of a substantially semicircular band main body 61. A sleeve is provided, and a pair of band main bodies 61 are attached to the outer peripheral surface of the tubular other end 42 of the flexible water-proof material 4 so that the nut and the sleeve face each other, and a bolt is screwed into the nut through the sleeve. Thus, the pair of band main bodies 61 can be connected and fixed. Thereby, the fixing band 6 can apply a substantially uniform tightening force to the outer peripheral surface of the tubular other end portion 42 of the flexible water blocking material 4 via the band main body 61. Therefore, the water stop protrusion 422 provided on the inner peripheral surface of the tubular other end 42 of the flexible water stop material 4 can be brought into close contact with the outer peripheral surface of the composite pipe 3 and can be fixed in a sealed state.

  Next, a procedure for constructing the connection structure configured as described above will be described below.

  First, in the manhole 1 to which the existing pipe 2 to be rehabilitated is connected, the invert 1a is suspended to form an arrangement space for the cushion material 7 on the pipe bottom side of the existing pipe 2. Next, when the flexible water blocking material 4 is inserted into the outer peripheral surface of the composite pipe 3, the manhole 1 corresponds to the anchor bolt mounting hole 41 a formed in the flange-shaped one end 41 of the flexible water blocking material 4. After the bolt hole is formed in the peripheral wall, an adhesive is filled in the bolt hole, and the anchor bolt 5 is driven and fixed.

  When the peripheral wall of the manhole 1 is eroded by hydrogen sulfide or the like, the peripheral wall is repaired using an epoxy resin or the like.

  If the adhesive is hardened and the anchor bolt 5 is fixed, the belt-like member is spirally wound by a pipe making machine, and the rehabilitating pipe 31 is placed in the existing pipe 2 across the adjacent manhole 1 although not shown in detail. Is manufactured. At this time, the rehabilitating pipe 31 is continuously formed so as to protrude by the length set in the manhole 1, and the upper half of the rehabilitating pipe 31 protruding into the manhole 1 is set to the set length. Excision is made over the entire length to form a protrusion 311 only in the lower half.

  Next, a cylindrical body 33 having a length obtained by subtracting the length of the protruding portion 311 from the length of the portion of the rehabilitating pipe 31 protruding into the manhole 1 and an inner diameter slightly larger than the inner diameter of the existing pipe 2 protrudes into the manhole 1. The rehabilitation pipe 31 is inserted into the outer peripheral surface side, the tip is abutted against the inner wall surface of the manhole 1, and is temporarily fixed using the anchor bolt 5 or the like. Then, the filler 32 is filled over the gap between the outer peripheral surface of the rehabilitated pipe 31 and the inner peripheral surface of the existing pipe 2 and the gap between the outer peripheral surface of the rehabilitated pipe 31 protruding into the manhole 1 and the inner peripheral surface of the cylindrical body 33. Then, the composite pipe 3 protruding in the set length is continuously formed in the existing pipe 2 and the manhole 1.

  If the composite pipe 3 is formed in this way, butyl rubber or the like is provided on the outer peripheral side and the inner peripheral side of the anchor bolt 5 which is a portion of the inner wall surface of the manhole 1 where the flange-shaped one end portion 41 of the flexible water blocking material 4 contacts. After adhering the sealing material 52 (see FIG. 9) over the entire circumference, the flexible waterproof material 4 is fitted to the outer peripheral surface side (the outer peripheral surface side of the cylindrical body 33) of the composite pipe 3 protruding into the manhole 1. At the same time, the anchor bolt mounting hole 41 a of the flange-shaped one end 41 is inserted into the anchor bolt 5. Next, a steel retainer plate 45 (see FIGS. 2 and 9) in which a plurality of mounting holes corresponding to the anchor bolt mounting holes 41a of the flange-shaped one end portion 41 is previously inserted is inserted into the anchor bolt 5 to be flexible. After being applied to the inner surface of the flange-shaped one end portion 41 of the water blocking material 4, a nut 51 is screwed into the anchor bolt 5, and the flange-shaped one end portion 41 of the flexible water blocking material 4 is fixed to the inner wall surface of the manhole 1. Thereby, the outer surface of the flange-shaped one end portion 41 of the flexible water blocking material 4 and the inner wall surface of the manhole 1 are sealed through the sealing material 52 and the water blocking protrusion 411.

  Further, a pair of band main bodies 61 are mounted around the vicinity of the tip of the tubular other end 42 of the flexible water-proof material 4, and bolts are screwed into nuts through sleeves, and the flexible water-stopping material 4 is fixed via the pair of band main bodies 61. The tubular other end 42 of the water material 4 is fixed to the outer peripheral surface of the composite tube 3 (the outer peripheral surface of the cylindrical body 33). Thereby, the outer peripheral surface of the composite pipe 3 and the inner peripheral surface of the tubular other end portion 42 of the flexible water blocking material 4 are sealed through the water blocking protrusion 422.

  At this time, the manhole 1 is an on-site assembly manhole, that is, the inner wall surface is formed in an arc shape when viewed from above, so that the flange-shaped one end portion 41 and the displacement absorbing portion 43 of the flexible water-proof material 4 are Since both the left and right sides are curved along the radius of curvature of the inner wall surface with respect to the top and bottom of the tube, the bent state of the displacement absorbing portions 43 on both the left and right sides is large. Therefore, it is preferable to arrange the connecting portions of the fixing band 6 with the bolts and nuts at the top and bottom of the pipe in order to secure work space.

  When the mounting work of the flexible water blocking material 4 is completed, the space formed in the lower half of the outer peripheral surface side of the flexible water blocking material 4 fitted and fixed to the composite pipe 3 by holding the invert 1a. And the cushion material 7 is arrange | positioned in the space formed in the outer peripheral surface side substantially lower half part of the protrusion part 311 of the rehabilitation pipe | tube 31 protruded inward rather than the flexible water stop material 4. FIG. That is, a foamed plastic such as urethane foam is injected over the space formed in the lower half portion on the outer peripheral surface side of the flexible water blocking material 4 and the space formed in the lower half portion on the outer peripheral surface side of the protruding portion 311 of the rehabilitation pipe 31. Then, the cushion material 7 made of foam is formed by foaming on the spot, and the substantially lower half of the outer peripheral surface side of the flexible waterproofing material 4 and the substantially lower half of the outer peripheral surface side of the protruding portion 311 of the rehabilitating pipe 31 are formed as the cushion material 7. Support by.

  Next, the concrete is placed in the first place, and the invert la continuous with the protruding portion 311 of the rehabilitated pipe 31 in the composite pipe 3 is restored while the cushion material 7 is buried. Specifically, the concrete is struck so as to fill the cushion material 7 and to form a semicircular inner peripheral surface that is continuous with the distal end surface of the protruding portion 311 of the rehabilitation pipe 31 and continuous with the inner peripheral surface thereof. Established. Thereby, the inner peripheral surface of the rehabilitation pipe 31 and the inner peripheral surface of the restored invert 1a are continuous.

  The connection structure between the manhole 1 and the composite pipe 3 configured as described above has the following advantages.

  By fixing the flexible water blocking material 4 across the outer peripheral surface of the composite tube 3 that protrudes the set length into the manhole 1 and the inner wall surface of the manhole 1, the flow cross-sectional area of the composite tube 3 is not reduced. The flow ability can be secured.

  Even if the existing pipe 2 is dropped from the manhole 1 due to ground deformation such as an earthquake, or the connecting portion thereof is broken and the existing pipe 2 is pulled out, protruded or bent, the composite pipe The displacement absorbing portion 43 of the flexible water-proof material 4 fixed over the outer peripheral surface 3 and the inner wall surface of the manhole 1 follows and deforms, and can easily absorb various displacements. In addition, the flexible water blocking material 4 is fixed in a sealed state to the inner wall surface of the manhole 1 and the outer peripheral surface of the composite tube 3, and the connection portion between the manhole 1 and the existing tube 2 is temporarily damaged, Even if an external water pressure acts on the flexible water-stopping material 4 through, water-stopping performance can be ensured and the flowability of the composite pipe 3 is not affected.

  Furthermore, by disposing the cushion material 7 covering the substantially lower half of the outer peripheral surface side of the flexible water blocking material 4 and restoring the invert 1a, it is possible to stably ensure the flow ability by the invert 1a, The cushioning material 7 can protect the flexible waterproof material 4 and ensure the deformation of the displacement absorbing portion 43. Therefore, when the composite pipe 3 integral with the existing pipe 2 is projected due to an earthquake or the like, and the flexible water blocking material 4 fixed to the composite pipe 3 follows the projection of the composite pipe 3, the cushion material 7 is compressed and deformed. However, the displacement absorbing portion 43 can be deformed and absorbed. In addition, when the composite pipe 3 is pulled out and the flexible water blocking material 4 fixed to the composite pipe 3 follows the composite pipe 3, the displacement absorbing portion 43 can be deformed and absorbed.

  Furthermore, when a crack or the like occurs on the peripheral wall of the manhole 1 due to an earthquake or the like and is transmitted to the anchor bolt 5, the anchor bolt 5 is fixed by an adhesive, and the external water pressure does not leak through the anchor bolt 5. The water stop performance can be secured.

  Moreover, since the existing pipe 2 is not cut or cut out during construction, the composite pipe 3 is formed on the existing existing pipe 2 in a healthy state. The strength can be maintained.

  In addition, since the connection work is performed on the inner wall surface of the manhole 1 and the outer peripheral surface of the composite pipe 3 in the manhole 1, workability can be ensured and efficiently performed.

  In the above-described embodiment, the case where the tubular other end 42 of the flexible water-proof material 4 is fixed to the composite pipe 3 using the fixing band 6 including the two band bodies 61 has been described. The fixing band 6 is not limited to this, and any fixing structure can be adopted.

  Hereinafter, another fixing structure for fixing the tubular other end portion 42 of the flexible water blocking material 4 to the composite pipe 3 will be described.

  As shown in FIGS. 10 to 12, the fixing structure is divided into a plurality of pieces in the circumferential direction, for example, a cylindrical body 33 formed by three segments 331 and a plurality of pieces in the circumferential direction. For example, the tubular other end portion 42 of the flexible waterproof material 4 is fixed using six arc-shaped fixing plates 62.

  Here, each segment 331 forming the cylindrical body 33 has flanges 332 toward the inner peripheral side at both ends, and a plurality of bolt holes (not shown) are formed at intervals in the circumferential direction. At the same time, the cap nut 333 is formed by watertight welding facing each bolt hole on the inner peripheral surface side.

  On the other hand, each fixed plate 62 is formed to have an inner diameter corresponding to the outer diameter of the cylindrical body 33, and a plurality of bolt holes (not shown) are spaced in the circumferential direction corresponding to the cap nut 333 of the segment 331 described above. ) Is formed.

  In this case, the tubular other end portion 42 of the flexible water blocking material 4 also has a plurality of bolt holes (not shown) spaced in the circumferential direction corresponding to the cap nut 333 of the segment 331 in the circumferential direction. ) Is formed.

  In order to fix the tubular other end 42 of the flexible waterproof material 4 to the composite pipe 3 using the plurality of segments 331 and the plurality of fixing plates 62, first, the adjacent segments 331 are opposed to each other. The flanges 332 are connected in order using bolts and nuts to form the cylindrical body 33. Next, a sealing material 52 such as butyl rubber is pasted around the entire periphery of the cylindrical body 33 with the cap nut 333 interposed therebetween. Then, after inserting the tubular body 33 into the rehabilitating pipe 31 protruding into the manhole 1, and temporarily fixing the tip abutting against the inner wall surface of the manhole 1, the gap between the rehabilitating pipe 31 and the existing pipe 2 and the inside of the manhole 1 The filling material 32 is filled in the gap between the rehabilitation pipe 31 and the cylindrical body 33 that are projected in the above-described manner, and the composite pipe 3 that projects in the set length in the existing pipe 2 and the manhole 1 is continuously formed.

  If the composite pipe 3 is formed, as described above, the flexible water-stopping material 4 is fitted and inserted into the cylindrical body 33 of the composite pipe 3 protruding into the manhole 1, and the flange-like one end 41 is connected to the anchor bolt 5, It is fixed to the inner wall surface of the manhole 1 through the presser plate 45 and the nut 51.

  Next, a fixing plate 62 is placed around the vicinity of the distal end portion of the tubular other end portion 42 of the flexible water blocking material 4, and a cutting bolt 63 is inserted through the bolt hole, and the bolt hole and segment 331 of the tubular other end portion 42 are inserted. And screwed into the cap nut 333 through the bolt hole. Thereafter, the nut 64 is screwed into the cutting bolt 63, and the tubular other end 42 of the flexible water blocking material 4 is sandwiched and fixed to the composite pipe 3 (tubular body 33) via the fixing plate 62. Hereinafter, the fixing plate 62 is fastened in order in the circumferential direction via the dimension bolts 63 and the nuts 64, and the tubular other end portion 42 of the flexible water-proof material 4 is fixed over the entire circumference. As a result, the composite pipe 3 and the flexible waterproofing material 4 can be fixed in a sealed state via the waterproofing protrusion 422.

  By the way, in embodiment mentioned above, in order to protect the flexible water-proof material 4 from the concrete which restores the invert 1a, when providing the cushion material 7 in the substantially lower half part of the outer peripheral surface side of the flexible water-proof material 4 However, you may make it cover the flexible water stop material 4 with a cover material.

  Specifically, the cover material 8 is made of a stainless steel plate, and as shown in FIG. 13, a disc part 81 having a hole with an inner diameter corresponding to the outer diameter of the composite pipe 3 and an outer peripheral edge of the disc part 81. The cylindrical portion 82 is connected to the front end of the cylindrical portion 82 along the presser plate 45 that fixes the flange-shaped one end portion 41 of the flexible water-proof material 4 curved along the inner wall surface of the manhole 1. Has been disconnected.

  Even when this cover material 8 is used, as described above, the flexible water-proof material 4 is inserted into the composite pipe 3, and the flange of the flexible water-proof material 4 is respectively attached to the inner wall surface of the manhole 1 and the outer peripheral surface of the composite pipe 3. After fixing the one end portion 41 and the tubular other end portion 42, the disc portion 81 of the cover member 8 is inserted into the outer peripheral surface of the distal end portion of the composite tube 3, and the distal end of the cylindrical portion 82 is butted against the presser plate 45, After the cover material 8 is temporarily fixed with an adhesive or the like, concrete may be cast to restore the invert 1a.

  In this case, as the cover material 8, the cylindrical portion 82 may be slidably formed in a telescope shape, and its tip may be abutted against the presser plate 45.

  Further, the cover material 8 is not limited to a stainless steel plate and may be made of rubber.

In the above-described embodiment, the manhole 1 is an on-site assembly manhole whose wall surface is arcuate when viewed from above, but it may be an on-site manhole having a flat wall surface. At this time, the flexible water blocking material 4 is flexible, so that it is not necessary to be molded according to the wall surface shape of the manhole 1 and the specifications can be made common.

  Further, as a method for producing the rehabilitated pipe 31 constituting the composite pipe 3, the remanufactured pipe is produced by rotating the pipe making machine around the axis of the existing pipe and joining the joining portions of the adjacent belt-like members together. The case where a belt-shaped member is newly supplied to a rehabilitated pipe that has been piped without rotation and a rehabilitated pipe is additionally formed has been described, but the pipe-shaped machine is installed in a manhole and the belt-shaped member supplied to the pipe-making machine. It is also possible to use a pipe making method in which spirally wound are wound, joints of adjacent belt-like members are joined to each other to produce a rehabilitated pipe, and the regenerated pipe thus produced is inserted into an existing pipe while rotating. Absent.

  In this case, when the rehabilitated pipe is manufactured by joining the joint portions of the adjacent belt-like members, even if the joint portions of the belt-like members are directly joined to each other, indirect joining using a connector separate from the belt-like member. It may be. That is, as shown in FIG. 16, the belt-like member 110 has joint portions 111 (concave grooves 112) formed at both side end portions, and the connector 120 is joined at both side end portions where the adjacent belt-like members 110 are abutted. A joint portion (convex portion 121) that can be joined to the portion 111 (concave groove 112) is formed. Then, in a state in which the edge portions of the belt-shaped members 110 that are spirally wound and are adjacent to each other are abutted with each other, the bonding groove 112 of the preceding belt-shaped member 110 and the subsequent belt-shaped belt that is juxtaposed with the bonding recess 112 The connector 120 is fitted from the inner peripheral side of the member 110 across the joining concave groove 112 to join the joining convex portion 121 (see FIG. 17), and the adjacent belt-like members 110 are joined via the connector 120. Therefore, the rehabilitation pipe is made.

  Moreover, as joining of the junction parts of the adjacent strip | belt-shaped member 100, the joining part of adjacent strip | belt-shaped members is fused and joined with molten resin other than the joining by fitting of joining parts, and a rehabilitation pipe | tube is manufactured. You may pipe.

  Furthermore, the method for producing the rehabilitated pipe constituting the composite pipe 3 is limited to a method of producing a rehabilitated pipe by winding a belt-like member in a spiral and joining the joints of adjacent belt-like members together. It is not a thing. For example, although not shown in detail, segment-like block bodies constituting a part of the tubular body are connected in the circumferential direction to form short pipe bodies having various cross-sectional shapes, and short adjacent to these axial directions. The block bodies in the tubular body may be connected to produce a rehabilitated pipe, and after assembling the hollow frame-shaped reinforcing body by a plurality of reinforcing members substantially along the inner peripheral surface of the existing pipe, A plurality of inner surface members may be sequentially attached to the inner peripheral side of the reinforcing body, and a rehabilitated pipe along the longitudinal direction of the existing pipe may be formed.

  As described above, the rehabilitating pipe 31 constituting the composite pipe 3 is a rehabilitating pipe having any structure as long as it is integrated with the existing pipe 2 through the filler 32 to ensure the load bearing strength. It does not matter.

DESCRIPTION OF SYMBOLS 1 Manhole 1a Invert 2 Existing pipe 3 Composite pipe 31 Rehabilitation pipe 32 Filler 33 Cylindrical body 4 Flexible waterproof material 41 Flange-shaped one end part 42 Tubular other end part 43 Displacement absorption part 45 Presser plate 5 Anchor bolt 51 Nut 6 Fixing band 61 Band body 62 Fixing plate 7 Cushion material 8 Cover material

Claims (5)

  It is a connection structure between a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of the existing pipe buried in the ground over the adjacent manhole, and the composite pipe is formed in the existing pipe and in the manhole. The rehabilitated pipe that has been formed to protrude for a set length, the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the renovated pipe in the existing pipe, and the outer peripheral surface of the rehabilitated pipe that protrudes into the manhole A cylinder in a composite pipe formed of a filler filled over a gap between the inner peripheral surface of the cylinder and the outer peripheral surface of the rehabilitation pipe in the cylinder, and projecting a set length into a manhole with an invert. A flexible water-stopping material having a displacement absorbing portion is fitted on the outer peripheral surface of the body, and the flange-like one end and the tubular other end of the flexible water-proofing material are sealed to the inner wall surface of the manhole and the outer peripheral surface of the cylindrical body, respectively. In state A manhole characterized in that a cushion material covering the substantially lower half of the outer peripheral surface side of the flexible waterstop material is disposed at the bottom of the manhole, and the cushion material is embedded in the restored invert Connection structure with composite pipe.   It is a connection structure between a manhole having an invert and a composite pipe that rehabilitates the inner peripheral surface of the existing pipe buried in the ground over the adjacent manhole, and the composite pipe is formed in the existing pipe and in the manhole. The rehabilitated pipe that has been formed to protrude for a set length, the gap between the inner peripheral surface of the existing pipe and the outer peripheral surface of the renovated pipe in the existing pipe, and the outer peripheral surface of the rehabilitated pipe that protrudes into the manhole A cylinder in a composite pipe formed of a filler filled over a gap between the inner peripheral surface of the cylinder and the outer peripheral surface of the rehabilitation pipe in the cylinder, and projecting a set length into a manhole with an invert. A flexible water-stopping material having a displacement absorbing portion is fitted on the outer peripheral surface of the body, and the flange-like one end and the tubular other end of the flexible water-proofing material are sealed to the inner wall surface of the manhole and the outer peripheral surface of the cylindrical body, respectively. In state A manhole characterized in that a cover material covering the entire circumference of the displacement-absorbing portion of the flexible water-stopping material is disposed, and a substantially lower half of the cover material is embedded in the restored invert Connecting structure with composite pipe.   3. A connection structure between a manhole and a composite pipe according to claim 1 or 2, wherein one end of the flexible water-proofing material is fixed via an adhesive anchor bolt, a presser plate and a nut fixed to the peripheral wall of the manhole. The connecting structure between the manhole and the composite tube is characterized in that the other end of the tube is fixed to the outer peripheral surface of the cylindrical body via a fixing band or a plurality of fixing plates.   A method of connecting a manhole having an invert to an adjacent manhole and a composite pipe for rehabilitating the inner peripheral surface of the existing pipe buried in the ground, and connecting the manhole invert connected to the existing pipe to be rehabilitated. After that, a rehabilitation pipe is produced by projecting the set length into the existing pipe and the manhole, and then a cylindrical body is fitted and inserted into the outer peripheral surface of the rehabilitation pipe protruding into the manhole. After filling the filler over the gap between the surface and the outer peripheral surface of the rehabilitated pipe in the existing pipe and the gap between the inner peripheral surface of the cylindrical body and the outer peripheral surface of the rehabilitated pipe in the cylindrical body, A flexible water-proof material having a displacement absorbing portion is inserted, one end of the flange-like shape is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the outer peripheral surface of the cylindrical body. The outer surface side of the lower half After disposing the cushion material at the bottom of the manhole covers, together with Da設 concrete embedding the cushion material, a method of connecting the manhole, characterized in that to restore the inverted composite tube.   A method of connecting a manhole having an invert to an adjacent manhole and a composite pipe for rehabilitating the inner peripheral surface of the existing pipe buried in the ground, and connecting the manhole invert connected to the existing pipe to be rehabilitated. After that, a rehabilitation pipe is produced by projecting the set length into the existing pipe and the manhole, and then a cylindrical body is fitted and inserted into the outer peripheral surface of the rehabilitation pipe protruding into the manhole. After filling the filler over the gap between the surface and the outer peripheral surface of the rehabilitated pipe in the existing pipe and the gap between the inner peripheral surface of the cylindrical body and the outer peripheral surface of the rehabilitated pipe in the cylindrical body, A flexible water-proof material having a displacement absorbing portion is inserted, one end of the flange-like shape is fixed to the inner wall surface of the manhole, and the other tubular end is fixed to the outer peripheral surface of the cylindrical body. All around the displacement absorber After providing the cover material covering, as well as embedded substantially lower half of the cover material to Da設 concrete, method of connecting the manhole and the composite tube, characterized in that to recover the inverted.

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