JP2006029561A - Existing pipe lining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an existing pipe lining method for easily and inexpensively regenerating an existing pipe into a shape approximate to the sectional shape of the existing pipe while restricting a reduction in the cross section of a pipeline. <P>SOLUTION: The lining method for the existing pipe 10 comprises using an anchor 56 for mounting strips 12 on the inner face of the existing pipe 10, connecting the strips 12 in their longitudinal directions thereto with connection members, arranging flexible joiners 16 at the corners of the existing pipe 10, and joining the strips in their cross directions thereto with joiners 14 and the flexible joiners 16. Finally, the inner face of the existing pipe 10 is covered with the strips 12 and a filler 58 is filled between the inner face of the existing pipe 10 and the strip 12. Flexible deformation portions 46 of the flexible joiners 16 are expanded to adjust spaces between the strips 12 neighboring each other in the cross directions so that the flexible joiners 16 can be arranged at the corners of the existing pipe 10. Thus, the flexible deformation portions 46 are bent corresponding to the corners of the existing pipe 10 to restrict a reduction in the cross section of the existing pipe 10 when regenerated, preventing the capacity degradation of waste water flowing down in the existing pipe 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an existing pipe lining method, and more particularly to an existing pipe lining method for rehabilitating a non-circular existing pipe such as a rectangle.

An example of a conventional existing pipe lining method is disclosed in Patent Documents 1 and 2. In this existing pipe repairing method of Patent Documents 1 and 2, three arc segments are combined to assemble a highly rigid ring-shaped reinforcing member, and a connecting member is inserted between the ring-shaped reinforcing members to form a reinforcing body. To do. A fitting member is fitted to the inner periphery of the reinforcing body, an inner surface member is attached to the fitting member, and a curable filler is injected between the existing tube and the inner surface member to repair the existing tube.
JP 2001-311387 A [E21D 9/06, F16L 55/18] JP 2002-310378 A [F16L 55/18, B29C 63/30, E03F 7/00, B29L 23:00]

  In the prior arts of Patent Documents 1 and 2, since a highly rigid ring-shaped reinforcing member is used, it is necessary to prepare the ring-shaped reinforcing member according to the cross-sectional shape and size of the existing pipe, which is troublesome and expensive. End up.

  Therefore, a main object of the present invention is to provide an existing pipe lining method that can easily and inexpensively suppress the reduction of the pipe cross-section and regenerate the existing pipe in a shape close to the cross-sectional shape of the existing pipe. It is.

  The invention of claim 1 includes: (a) a step of providing a band-like body having a predetermined length in the longitudinal direction of the existing pipe at a distance from the inner surface of the existing pipe; and (b) a step of filling a filler in the gap. This is a pipe lining method.

  In the first aspect of the present invention, if the strip is attached to the inner surface of the existing pipe by using an anchor at a distance from the inner surface of the existing pipe, for example, even if the existing pipe inner surface is uneven, the strip is not used. It can be attached to the existing pipe inner surface. And if a filler is filled between this strip and the existing pipe inner surface, the existing pipe will be rehabilitated.

  In addition, by attaching the strip in the longitudinal direction of the existing pipe, the strip can be provided not only in the circular existing pipe but also in a non-circular existing pipe such as a rectangle or a horseshoe shape. Cross-sectional reduction can be suppressed. And since the flow rate of water becomes quick with the strip | belt-shaped body with small surface roughness, the drainage capacity of the existing pipe | tube can fully be ensured.

  The invention of claim 2 is characterized in that step (a) includes (a1) providing a spacer along the inner surface of the existing pipe, and (a2) attaching the strip to the spacer. Is the method.

  In the invention of claim 2, by covering the spacer provided at a constant interval along the inner surface of the existing pipe with the band, the flow rate of water is increased by the band having a small surface roughness, and the cross section of the existing pipe Reduction can be suppressed.

  If a spacer such as a reinforcing bar is used, the existing pipe, the spacer, and the strip are integrated by filling the filler between the inner surface of the existing pipe and the strip, and the reconstructed existing pipe has an integrated strength. obtain. In particular, reinforcing bars such as rebars with high tensile strength have high compressive strength but low tensile strength to supplement the strength of fillers such as mortar and concrete. Is provided.

  Invention of Claim 3 is the lining method of the existing pipe | tube of Claim 1 or 2 with which the step (a) includes the step which joins the width direction side edge of the adjacent strip | belt-shaped body with a joiner.

  In the invention of claim 3, if a strip is attached to the inner surface of the existing pipe and the adjacent strips are joined with a joiner, the inner surface of the existing pipe is covered without a gap, and a filler is filled between the inner surface of the existing pipe and the strip. be able to.

  The invention according to claim 4 uses, in the width direction, a joiner that includes an expansion / contraction variable joiner including two engaging portions that fit on the side edges in the width direction and an expansion / contraction deformation portion formed between the two engaging portions. The lining method for an existing pipe according to claim 3, wherein an interval between adjacent strips is adjusted.

  In the invention of claim 4, even if the interval between adjacent belt-like bodies is different, the belt-like bodies can be coupled with the stretchable variable joiner by extending or contracting the expansion / contraction deformation part of the variable expansion / contraction joiner according to the interval. The strips can be spread over any length of the surface without any gaps. In other words, when the length of the belt-like body connected by a fixed-length joint is shorter or longer than the width of the existing pipe inner surface, a variable expansion / contraction variable joiner is used instead of the fixed-length joint, and the expansion / contraction deformation part is expanded and contracted. Then, the interval between the engaging portions is adjusted, and the engaging portions are fitted to the belt-like bodies to join the belt-like bodies adjacent in the width direction.

  The invention according to claim 5 is the lining method for an existing pipe according to claim 4, wherein an extendable and variable joiner is used at a corner of the existing pipe.

  According to the fifth aspect of the present invention, the angle of the two engaging portions of the telescopic variable joiner is changed in accordance with the corner portion of the existing pipe by bending the telescopic deformation portion of the telescopic variable joiner. The joint can be fitted and joined. Thereby, the cross-sectional reduction of the existing pipe can be suppressed to be small, and the belt-like body can be provided on the inner surface of the existing pipe without being limited by the shape of the existing pipe.

  According to the present invention, by providing a belt-like body having a predetermined length in the longitudinal direction of the existing pipe, the flow capacity is not reduced by minimizing the cross-sectional reduction of the pipe line, and the existing pipe is formed in a shape close to the shape of the existing pipe. The tube can be renovated easily and inexpensively.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

  In the existing pipe lining method according to the embodiment of the present invention shown in FIG. 8, the strip 12 is provided on the inner surface of the existing pipe 10, the width direction thereof is joined by the joiner 14 or the variable stretchable joiner 16, and the longitudinal direction thereof is connected. The existing pipe 10 is rehabilitated by connecting with members.

  The strip 12 shown in FIG. 1 is formed by extruding a synthetic resin such as hard vinyl chloride, and includes a strip-shaped main body 20. Legs 22 having a T-section in cross section are provided on the outer surface of the main body 20, and grooves 24 are formed on both side edges in the width direction of the main body 20. The groove 24 is formed by the connecting portion 26 and the T-shaped leg portion 22, and a projection 28 having a substantially sawtooth cross section is continuously formed along the groove 24 on the inner surface of the T-shaped leg portion 22.

  When the strip 12 is long, the reinforcing tool 30 is attached to the plurality of T-shaped leg portions 22 with respect to one strip 12. The reinforcing tool 30 covers the bottom portion 22a of the T-shaped leg portion 22 to prevent the strip 12 from bending in the length direction, and is formed of a metal such as iron or aluminum. The T-shaped leg portion 22, the groove 24, the connecting portion 26, and the reinforcing tool 30 are formed along the entire length of the main body 20.

  The joiner 14 shown in FIG. 2 is formed of a synthetic resin such as hard vinyl chloride, and includes a belt-like portion 32. Two U-shaped leg portions 34, sandwiching portions 36, and protrusions 38 are provided on the outer surface of the band-shaped portion 32, in a left-right manner. The cross-sectional shape of the sandwiching portion 36 is bent in a square shape, and a projection 40 having a substantially serrated cross section is formed on the protrusion 38, and the longitudinal direction of the strip-shaped portion 32 is formed between the protrusion 38 and the sandwiching portion 36. A sealing material 42 is attached. This U-shaped leg part 34, the clamping part 36, and the protrusion 38 are continuously formed over the whole along the length direction of a board part.

  The expansion / contraction variable joiner 16 shown in FIG. 3 includes two engaging portions 44, which are formed of a hard synthetic resin such as hard vinyl chloride. A protrusion 38 and a sandwiching part 36 for fitting with the groove 24 of the strip 12 protrude on the outer surface of the engaging part 44, and a sealing material 42 is mounted between them. The protrusions 38, the sandwiching portions 36, and the sealing material 42 are the same as the joiner 14, and are continuously formed along the longitudinal direction of the engaging portion 44. In addition, a stretchable deformation portion 46 formed of synthetic rubber, soft synthetic resin, elastomer, or the like is fixed to each side edge in the width direction of the engaging portion 44.

  The connecting member 18 shown in FIG. 4 is formed by injection molding of a synthetic resin such as vinyl chloride and includes a plurality of connecting portions 48 to be connected. Each connection portion 48 includes a bottom surface 50 and side surfaces 52 that rise vertically from both ends of the bottom surface 50 in the width direction, and are connected by a central connection wall 54.

When rehabilitating the inner surface of the existing pipe 10 having a rectangular cross section, as shown in FIG. 5, first, an anchor 56 to which a locking portion 55 such as a nut is attached is hit on the inner surface of the existing pipe 10. The locking portion 55 prevents the strip 12 from moving even if a force pressing the strip 12 against the inner surface side of the existing pipe 10 is applied. At this time, the distance between adjacent strips 12 in the width direction is calculated so that the width direction of the existing pipe 10 can be covered with the strip 12 and the joiner 14 and the extendable variable joiner 16 can be attached to the corner of the existing pipe 10. And hit the anchor 56. Although the widths of the strip 12 and the joiner 14 are constant, the width of the stretchable variable joiner 16 is stretched to, for example, 0 to 4 cm by the stretchable deforming portion 46. Therefore, the adjustment of the interval between the adjacent strips 12 in the width direction is stretchable. Then, the strip 12 is extended in the longitudinal direction, the outer surface provided with the T-shaped leg portion 22 and the like is directed to the inner surface of the existing pipe 10, and the T-shaped leg portion 22 on the side edge in the width direction of the strip 12 is previously provided. The strip 12 is attached through the anchor 56 to the through-hole 57 provided. The length direction of the attached strip 12 is joined by the connecting member 18. As shown in FIGS. 6A and 6B, an adhesive having a water-stopping property is applied to the connection portion 48 provided on one side of the connection plate 54 of the connection member 18, and The T shape of the strip 12 is such that the bottom surface 50 is in surface contact with the flat surface 12a between the two T-shaped legs 22 of the strip 12 and the side surface 52 is in surface contact with the two opposite surfaces 22b of the T-shaped leg 22 respectively. A connecting portion 48 is inserted between the leg portions 22. The same adhesive or the like is also applied to the remaining connection portions 48 and inserted between the T-shaped leg portions 22 of the other strips 12 to connect the strips 12 in the length direction.

  Then, as shown in FIG. 7, the strip 12 is attached to the inner surface of the existing pipe 10 in the width direction of the existing pipe 10 in the same manner as the strip 12.

  When the strip 12 is attached to the inner surface of the existing pipe 10, the joiner 14 and the telescopic variable joiner 16 are then joined to the strip 12 as shown in FIG. 8. In order to adjust the distance between the strips 12, a telescopic variable joiner 16 is fitted to a wide or narrow part and the corner of the existing pipe 10, and a joiner 14 is fitted to the other part.

  That is, when the interval between adjacent strips 12 is equal to the regular joiner 14, the protrusions 38 of the joiner 14 are fitted into the grooves 24 of the strip 12, as shown in FIG. As a result, the bent portion 36 a of the sandwiching portion 36 of the joiner 14 abuts on the T-shaped leg portion 22 of the strip 12, and the protrusion 40 of the protrusion 38 of the joiner 14 engages with the protrusion 28 of the T-shaped leg portion 22 of the strip 12. By doing so, the ridge 38 and the clamping part 36 of the joiner 14 cooperate with each other to clamp the T-shaped leg part 22 of the strip 12. Further, the T-shaped leg portion 22 of the strip 12 is pressure-bonded to the sealing material 42 of the joiner 14 to ensure the water tightness of the joint portion between the strip 12 and the joiner 14.

  When the interval between the adjacent strips 12 is narrow, as shown in FIG. 10, the expansion / contraction deformation part 46 of the expansion / contraction variable joiner 16 is folded, the two engagement parts 44 are brought into contact with each other, and the protrusion 38 is attached to the strip 12. It fits into the groove 24 and joins adjacent strips 12 together. On the other hand, when the interval between the adjacent strips 12 is wide, as shown in FIG. 11, the expansion / contraction deformation portion 46 of the expansion / contraction variable joiner 16 is widened, the two engagement portions 44 are separated, and the protrusions 38 are separated from the strip 12. It fits into the groove 24 and joins adjacent strips 12 together.

  Further, at the corner of the existing pipe 10, as shown in FIGS. 12 and 13, the expansion / contraction deformation portion 46 of the expansion / contraction variable joiner 16 is bent according to the corner of the existing pipe 10, and the two engaging portions 44 are respectively connected to the existing pipe 10. The protrusions 38 are fitted into the groove 24 of the strip 12 along the inner surface of the strip 10, and the adjacent strips 12 are joined to each other.

  A strip 12 or the like is attached to the inner surface of the existing pipe 10, and finally a filler 58 such as mortar or concrete is filled between the inner surface of the existing pipe 10 and the strip 12 as shown in FIG. At this time, the T-shaped leg portion 22 and the like of the strip 12 are embedded in the filler 58, and after the filler 58 is cured, the strip 12 and the like are firmly fixed to the filler 58.

  As described above, when the strip 12 is attached to the inner surface of the existing tube 10 with the anchor 56 spaced from the inner surface of the existing tube 10, the strip 12 is not used even if the inner surface of the existing tube 10 is uneven. Can be easily attached to the inner surface of the existing pipe 10.

  Further, by attaching the strip 12 so as to extend in the longitudinal direction of the existing pipe 10, the strip 12 can be provided not only in the circular existing pipe 10 but also in a non-circular existing pipe 10 such as a rectangle or a horseshoe shape. . Then, by adjusting the distance between adjacent strips 12 by expanding and contracting the expansion / contraction variable joiner 16, the strips 12 can be laid without gaps on any length of surface, and the expansion / contraction variable joiner 16 is installed in the existing pipe. It can be provided at 10 corners. And since the expansion / contraction variable joiner 16 freely changes the angle according to the angle of the existing pipe 10, the cross-sectional reduction of the existing pipe 10 can be suppressed to be small, and the strip 12 is not limited by the shape of the existing pipe 10. It can be provided on the inner surface.

  In addition, although the anchor 56 was struck to the strip 12 and the strip 12 was attached to the inner surface of the existing pipe 10, the holder 60 shown in FIG. 14 can be used instead of the anchor 56. The holding tool 60 has an anchor head having a U-shape or S-shape, and this head supports the bottom portion 22 a of the T-shaped leg portion 22 of the strip 12. The holder 60 is attached to the inner surface of the existing pipe 10, the strip 12 is hung on the holder 60, and the strip 12 is attached to the inner surface of the existing pipe 10. In this way, the strip 12 can be attached to the inner surface of the existing pipe 10 more simply by hanging the strip 12 on the holder 60.

  The lining method of the existing pipe 10 according to another embodiment of the present invention shown in FIG. 18 is substantially the same as the lining method of the existing pipe 10 shown in FIG. 1, but the method of attaching the strip 12 to the inner surface of the existing pipe 10 is the same. Different. In the embodiment of FIG. 1, the strip 12 is directly attached to the inner surface of the existing pipe 10 with the anchor 56, but in the embodiment of FIG. 18, the spacer 62 is provided on the inner surface of the existing pipe 10 and the strip 12 is attached to the spacer 62. Is attached to the inner surface of the existing pipe 10. Since the other parts are the same as the lining method of the existing pipe 10 shown in the embodiment of FIG.

  The spacer 62 is made of a metal such as a reinforcing bar, a punching metal, or an expanded metal assembled in a lattice shape, and can be attached to the strip 12.

  As shown in FIG. 15, the lattice reinforcing bars 62 are fixed to the inner surface of the existing pipe 10 with anchors 64. The grid-like reinforcing bars 62 are bound to the holes 66 formed in the T-shaped leg portions 22 on both side edges in the width direction of the strip 12 shown in FIG. Then, as shown in FIG. 17, the strip 12 is attached to the inner surface of the existing pipe 10, and the length direction of the strip 12 is connected by the connecting member 18 (FIG. 6A). As shown in FIG. 18, the adjacent strips 12 are joined by a joiner 14 or a telescopic variable joiner 16, and the strip 12 is joined by bending the telescopic variable joiner 16 at the corner of the existing pipe 10. Finally, if the inner surface of the existing tube 10 is covered with the strip 12 or the like, the filler 58 is filled between the inner surface of the existing tube 10 and the strip 12.

  As described above, when the existing pipe 10, the spacer 62, and the strip 12 are integrated by the filler 58 using the metal spacer 62, the spacer 62 such as a rebar having a high tensile strength has the strength of the filler 58 having a low tensile strength. In order to compensate, the renovated existing pipe 10 has sufficient strength to withstand earth pressure and water pressure.

  Further, when the joiner 14 and the expansion / contraction variable joiner 16 are fitted to the strip 12 in close contact with the spacer 62, the spacer 62 supports the strip 12 from the outer surface side, so that the joiner 14 and the like can be easily fitted to the strip 12. Excellent.

  Although the strip 12 is attached to the spacer 62 with the binding band 68, an S-shaped hook 70 shown in FIG. 19 may be used instead of the binding band 68. The S-shaped hook 70 is formed by bending a wire or the like into an S-shape, and one end 70 a can be hung on the spacer 62, and the other end 70 b can be hung on the bottom 22 a of the T-shaped leg portion 22 of the strip 12. For this reason, it is not necessary to make a hole 66 in the T-shaped leg portion 22 of the strip 12, and the spacer 62 and the strip 12 can be hung on the S-shaped hook 70 as compared with the case where the spacer 62 and the strip 12 are connected by the binding band 68. It is easier to attach the strip 12 to the spacer 62.

  As a method of attaching the strip 12 to the spacer 62, a hook member 72 shown in FIG. The hook member 72 includes a plate-like support surface 74 along the bottom portion 22 a of the T-shaped leg portion 22 of the strip 12, and a first curved portion 76 and a second curved portion 78 are formed on the support surface 74. The first bent portion 76 and the second bent portion 78 are bent from the support surface 74 in directions opposite to each other, the first bent portion 76 is used for hanging on the spacer 62, and the second bent portion 78 is a T-shape of the strip 12. Used to support the leg 22. If the hook member 72 shown in FIG. 20 (B) in which the length of the support surface 74 and the distance L between the first and second curved portions 76 and 78 are changed is prepared, the spacers as shown in FIG. Since the position 62 can be freely attached, the interval between the strips 12 adjacent to each other in the width direction can be changed.

  Since the support surface 74 of the hook member 72 is a plate extending in the longitudinal direction along the bottom 22a of the T-shaped leg portion 22 of the strip 12, it can hold the strip 12 more stably than the S-shaped hook. Can do.

It is sectional drawing which shows the strip which can be used for the lining method of the existing pipe | tube of one Example of this invention. It is sectional drawing which shows the joiner which can be used for the lining method of the existing pipe | tube of FIG. 1 Example. It is sectional drawing which shows the expansion-contraction variable joiner which can be used for the lining method of the existing pipe | tube of FIG. 1 Example. It is a perspective view which shows the connection member which can be used for the lining method of the existing pipe | tube of FIG. 1 Example. It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe with the anchor. (A) is a perspective view which shows the state which connects a strip with a connection member, (B) is sectional drawing which shows the state which connected the strip with the connection member. It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe with the anchor. It is sectional drawing which shows the state which couple | bonded the strip with the joiner and the expansion / contraction variable joiner. It is sectional drawing which shows the state which couple | bonded the strip with the joiner. It is sectional drawing which shows the state which couple | bonded the adjacent strip with a narrow space | interval of the width direction with the expansion-contraction variable joiner. It is sectional drawing which shows the state which couple | bonded the adjacent strip with a wide space | interval of the width direction with the expansion-contraction variable joiner. It is sectional drawing which shows the state which connected the adjacent strip with the expansion-contraction variable joiner provided along the corner | angular of the existing pipe. It is sectional drawing which shows the state which connected the adjacent strip with the expansion-contraction variable joiner provided along the corner | angular of the existing pipe. It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe | tube with the holder which can be used for the lining method of the existing pipe | tube of another Example of this invention. It is sectional drawing which shows the state which attached to the inner surface of the existing pipe | tube the grid | lattice reinforcement which can be used for the lining method of the existing pipe | tube of another Example of this invention. It is sectional drawing which shows the state which tied the strip to the lattice-shaped reinforcing bar of FIG. 15 with the binding band. It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe. It is sectional drawing which shows the state which couple | bonded the strip with the joiner and the expansion / contraction variable joiner. It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe with the S-shaped hook which can be used for the lining method of the existing pipe of another Example of this invention. (A) is a perspective view which shows the hook member which can be used for the lining method of the existing pipe | tube of another Example of this invention, (B) is a perspective view which shows a hook member longer than (A). It is sectional drawing which shows the state which attached the strip to the inner surface of the existing pipe | tube with the hook member of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Existing pipe 12 ... Strip 14 ... Joiner 16 ... Expansion / contraction variable joiner 44 ... Engagement part 46 ... Expansion / contraction deformation part 58 ... Filler 62 ... Spacer

Claims (5)

(A) A step of providing a strip having a predetermined length in the longitudinal direction of the existing pipe at a distance from the inner surface of the existing pipe, and (b) a method for lining the existing pipe, including a step of filling the gap with a filler.   The existing pipe lining method according to claim 1, wherein step (a) includes: (a1) providing a spacer along the inner surface of the existing pipe; and (a2) attaching the strip to the spacer.   3. The existing pipe lining method according to claim 1 or 2, wherein the step (a) includes a step (a3) of joining adjacent widthwise side edges of the strips with a joiner.   The belt-like shape adjacent to the width direction by using an expansion / contraction variable joiner including two engagement portions that fit on the side edge in the width direction and an expansion / contraction deformation portion formed between the two engagement portions. The lining method of the existing pipe | tube of Claim 3 which adjusts the space | interval of a body.   The lining method of the existing pipe | tube of Claim 4 using the said expansion-contraction variable joiner in the corner | angular part of the said existing pipe | tube.

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