JP5774467B2 - Pipe rehabilitation method - Google Patents

Description

  The present invention is a tube in which a long strip-shaped tube constituent member is spirally wound in an existing pipe, a tubular body is assembled, the tubular body is integrated with an existing pipe by a backing material, and the existing pipe is rehabilitated. It relates to the rehabilitation method.

  As a pipe rehabilitation method for rehabilitating an existing pipe, for example, there is a pipe making method as disclosed in Patent Document 1 as a conventional technique. In this pipe manufacturing method, after installing a spacer on the upper surface of the existing pipe (see FIG. 10 of Patent Document 1), a long strip-shaped pipe constituent member is spirally wound in the existing pipe, and adjacent windings are wound. The tubular body is assembled by joining the side edges. By performing this assembling process with the pipe making apparatus, it is possible to reduce human power and increase the amount of daily advancement.

  Then, a nozzle and a hose for injecting the backing material are passed between the existing pipe and the spacer, the backing material is injected from the nozzle, and the backing material is filled between the existing pipe and the tubular body (patent) (See FIG. 14 of Document 1). At this time, the spacer secures a space for inserting the nozzle and the hose and a space for facilitating the spreading of the backing material, and prevents the tubular body from being lifted by the buoyancy of the backing material. Thereafter, the backing material is cured, so that the existing pipe and the tubular body are integrated, and the existing pipe is rehabilitated.

  However, if a spacer is installed at the upper part of the inner surface of the existing pipe, the inner space of the existing pipe after rehabilitation is greatly decentered, and the effective cross section (the cross section of the inner space) is reduced. In the pipe rehabilitation method, it is required to increase the effective cross section of the existing pipe after rehabilitation.

  In the pipe rehabilitation method, it is also required to increase the strength of the existing pipe after rehabilitation. Therefore, for example, as disclosed in Patent Document 2, reinforcement is performed by arranging a reinforcing bar between an existing pipe and a pipe constituent member.

  On the other hand, for example, as disclosed in Patent Document 3, there is a method of reinforcing the wall surface of a concrete structure using reinforcing fiber lattice lines formed by laminating and forming carbon fibers or glass fibers in a lattice shape. In this reinforcing method, the reinforcing fiber lattice is fixed to the concrete wall surface with an anchor bolt, and then the mortar is sprayed or applied to increase the thickness.

  In the pipe rehabilitation method called the PFL method, a carbon fiber lattice is fixed to the inner surface of an existing pipe with an anchor bolt, a polyethylene panel is installed, and mortar is injected between the panel and the existing pipe. On the back side of the polyethylene panel, protrusions are provided at predetermined intervals in the longitudinal direction and the short direction.

  However, when anchor bolts are driven into the inner surface of a deteriorated existing pipe to fix the reinforcing fiber lattice, the existing pipe may be cracked or the crack may become large, and the existing pipe may be greatly damaged. There is.

JP 2002-364774 A JP-A 64-21124 JP 2010-189834 A

  The subject of this invention is providing the pipe rehabilitation method which can enlarge the effective cross section of the existing pipe after rehabilitation, and can raise intensity | strength, suppressing the damage of an existing pipe.

  In the present invention, a long band-shaped tube constituent member is spirally wound in an existing pipe, a tubular body is assembled, a backing material is filled between the existing pipe and the tubular body, and the backing material is cured. In the pipe rehabilitation method in which the existing pipe and the tubular body are integrated to regenerate the existing pipe, a plurality of support members extending in the longitudinal direction are temporarily fixed to the inner surface of the existing pipe at predetermined intervals, and After the reinforcing fiber lattice is attached in parallel with the inner surface of the existing pipe with a gap, the tubular body is assembled inside the reinforcing fiber lattice.

  According to the above, the reinforcing fiber lattice is interposed between the existing pipe and the tubular body in parallel with the inner surface of the existing pipe via the plurality of support members without installing a spacer on the upper surface of the existing pipe. For this reason, a gap equivalent to the height of the support member can be secured between the existing pipe and the reinforcing fiber lattice. Then, injecting the backing material from the gap, spreading the backing material to the back side of the tubular body through the lattices of reinforcing fiber lattices, and filling the backing material between the existing pipe and the tubular body Can do. Moreover, since the reinforcing fiber lattice line supports the tubular body from the circumferential direction, it is possible to prevent the tubular body from moving due to the buoyancy caused by the backing material.

  Moreover, since the space | interval of an existing pipe and a tubular body becomes constant over a perimeter, the hardening state of the backing material with which it filled between the existing pipe and the tubular body can be made uniform. For this reason, the inner space of the existing pipe after rehabilitation is not decentered and becomes a perfect circle, and the strength of the existing pipe after rehabilitation is made uniform over the entire circumference, and the effective cross section (cross section of the inner space) Can be increased.

  Furthermore, after the tubular body is assembled, the supporting member is pressed against the inner surface of the existing pipe through the reinforcing fiber lattice by the extension force of the pipe constituent member, and after the backing material is cured, the existing pipe, the tubular body, The reinforcing fiber lattice and the support member are integrated. For this reason, it is sufficient to temporarily fix the support member for attaching the reinforcing fiber lattice streak to the inner surface of the existing pipe by simple means until that time, and it is not necessary to use a strong fixing tool. Can be suppressed.

  In the present invention, in the pipe rehabilitation method, the support member may be temporarily fixed to the inner surface of the existing pipe with the longitudinal direction of the support member facing the pipe axis direction of the existing pipe.

  Thereby, it is not necessary to bend the support member according to the curvature of the existing pipe, and the linear support member can be fitted along the inner surface of the existing pipe without a gap. For this reason, it can suppress that the space | interval of an existing pipe and a tubular body expands by a support member, and the effective cross section of the existing pipe after rehabilitation shrinks. Moreover, the cost concerning the support member can be kept low, and the construction cost can be kept low accordingly.

  Further, in the present invention, in the pipe rehabilitation method, the supporting member is pressed against the inner surface of the existing pipe by the pressing piece, and the pressing piece is attached to the inner surface of the existing pipe with a screw, a screw or a bolt, thereby Temporarily fix to the inner surface.

  Thereby, the stress which arises in an existing pipe can be made small and damage to an existing pipe can be suppressed more.

  Furthermore, in the present invention, in the pipe rehabilitation method, short fibers may be mixed into the backing material.

  As a result, when the backing material is filled between the existing pipe and the tubular body, the short fibers are entangled with the reinforcing fiber lattice, the support member, and the pipe constituent member. For this reason, after hardening of a backing material, the joining force of a backing material, a reinforcing fiber lattice line, a support member, and a pipe constituent member becomes large, and the strength of an existing pipe after rehabilitation can be further increased.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the pipe rehabilitation method which can raise the intensity | strength by enlarging the effective cross section of the existing pipe after rehabilitation, suppressing the damage of an existing pipe.

It is the figure which showed the temporarily fixed state of the supporting member of the pipe rehabilitation method by one Embodiment of this invention. It is the figure which showed the attachment state of the carbon fiber lattice reinforcement of the pipe rehabilitation method. It is the perspective view which showed the temporarily fixed state of the supporting member of the same pipe rehabilitation method, and the attachment state of the carbon fiber lattice reinforcement. It is the elements on larger scale which showed the temporarily fixed state of the support member of the same pipe rehabilitation method, and the attachment state of the carbon fiber lattice reinforcement. It is the figure which showed the assembly state of the tubular body of the same pipe rehabilitation method. It is the figure which showed the assembly state of the tubular body of the same pipe rehabilitation method. It is the figure which showed the strip and joiner which are used with the pipe rehabilitation method. It is the figure which showed the filling state of the backing material of the pipe reorganization method. It is sectional drawing of the axial direction of the existing pipe after the rehabilitation by the pipe rehabilitation method. It is sectional drawing of the radial direction of the existing pipe after the rehabilitation by the pipe rehabilitation method. It is sectional drawing of the radial direction of the existing pipe after the rehabilitation by other embodiment. It is the elements on larger scale which showed the temporarily fixed state of the support member by other embodiment, and the attachment state of the carbon fiber lattice reinforcement. It is sectional drawing of the radial direction of the existing pipe after the rehabilitation by other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  First, materials and apparatuses used in a pipe rehabilitation method according to an embodiment of the present invention will be described with reference to FIGS.

  The support member 3 shown in FIGS. 1 to 4 and the like is made of equilateral mountain steel that extends in the longitudinal direction. As shown in FIGS. 3 and 4, the support member 3 is formed with a plurality of holes 3 a and 3 b. A plurality of the support members 3 are temporarily fixed to the inner surface of the existing pipe P at a predetermined interval with the apex 3c directed toward the center of the existing pipe P and the longitudinal direction directed to the pipe axis direction of the existing pipe P.

  Specifically, as shown in FIG. 4, the screw 5 that is a fixing member in a state where the pressing piece 4 is passed through the long hole 3 a of the supporting member 3 and the supporting member 3 is pressed against the inner surface of the existing pipe P by the pressing piece 4. Thus, the holding piece 4 is attached to the inner surface of the existing pipe P. The support member 3 is locked to the inner surface of the existing pipe P by performing such temporary fixing with the pressing piece 4 and the screw 5 at least at both ends of the support member 3. A screw or a bolt can be used instead of the screw 5. The screw 5 is attached to the inner surface of the existing pipe P by an electric tool or a hammer.

  The carbon fiber lattice 6 shown in FIGS. 2 to 4 is composed of FRP (Fiber Reinforced Plastics) lattice that is integrally laminated while impregnating a resin with high-performance continuous reinforcing fibers such as carbon and glass. . Since the specific gravity of the carbon fiber lattice reinforcement 6 is very light and the crossing portion of the lattice is flush, the carbon fiber lattice reinforcement 6 is thinner than the reinforcement. In addition, the carbon fiber lattice 6 has the same reinforcing effect as that of the reinforcing bar because the continuous reinforcing fibers having high strength and high elasticity are arranged in two directions. Furthermore, the carbon fiber lattice 6 does not generate rust and has excellent corrosion resistance. The carbon fiber lattice 6 is an example of the “reinforced fiber lattice” of the present invention.

  The carbon fiber lattice 6 is formed in the rectangle as shown in FIG. For example, the carbon fiber lattice reinforcement 6 can be easily carried into the existing pipe P by contracting it into a scroll shape.

  As shown in FIGS. 3, 4, and 6, the carbon fiber lattice 6 is attached on the support member 3 in parallel with the inner surface of the existing pipe P, and covers the inner surface of the existing pipe P over the entire circumference. Specifically, as shown in FIGS. 3 and 4, the carbon fiber lattice reinforcement 6 is placed so as to hang over the apexes 3 c of the plurality of support members 3, and appropriate portions of the carbon fiber lattice reinforcement 6 are bound to the support member 3. It is fixed by the member 7. As the binding member 7, for example, a wire or a resin binding band is used.

  The method, strength, and location for attaching the carbon fiber lattice line 6 to the support member 3 may be such a simple level that the carbon fiber lattice line 6 does not fall off due to its own weight, and does not need to be further strengthened. In addition, the method, strength, and location for temporarily fixing the support member 3 to the inner surface of the existing pipe P may be a simple level so that the support member 3 and the carbon fiber lattice 6 do not fall off due to their own weight, and are stronger than that. There is no need to make it.

  The strip 1 and the joiner 2 shown in FIGS. 5 to 7 and the like are formed by molding a synthetic resin such as hard vinyl chloride into a long band shape. As shown in FIG. 7A, a plurality of T-shaped leg portions 1a are formed on the back surface of the strip 1 at a predetermined interval. L-shaped leg portions 1 b are formed on the back side of the both side edges of the strip 1. On the surface side of both side edges of the strip 1, an uneven fitting portion 1 c is formed. The T-shaped leg portion 1 a, the L-shaped leg portion 1 b, and the fitting portion 1 c are formed so as to extend over the entire length of the strip 1.

  As shown in FIGS. 7A and 7B, the width of the strip 1 is larger than the width of the joiner 2. As shown in FIG. 7B, concave-convex fitting portions 2 c and ribs 2 b are formed on the back surfaces of both side edges of the joiner 2. A sealing material 2a for water stop is provided in the concave portion of the fitting portion 2c. The fitting portion 2 c and the rib 2 b are formed so as to extend over the entire length of the joiner 2.

  By winding the strip 1 spirally and fitting the fitting portion 2c of the joiner 2 to the fitting portion 1c of the adjacent winding side edge of the strip 1 as shown in FIG. Adjacent winding side edges of the strip 1 are joined. The tubular body R is assembled by continuously performing this joining. The strip 1 and the joiner 2 are examples of the “tube constituent member” of the present invention.

  The body 10 of the pipe making apparatus 100 shown in FIGS. 5 and 6 includes an operation unit 11, a traveling unit 12, a turning unit 13, and a drive source 14. The operator operates the pipe making device 100 by operating a lever, a button, or the like provided in the operation unit 11. The drive source 14 is composed of, for example, an electric motor with a reduction gear or an air motor.

  The traveling unit 12 transmits the power of the drive source 14 and rotates the wheel 15 to cause the pipe making device 100 to travel in the tube axis direction of the existing pipe P. The swivel unit 13 transmits the power of the drive source 14 and rotates the rotary shaft 17 around the axis, thereby causing the arms 19a, 19b, 19c, and 19d connected to the rotary shaft 17 to move around the pipe axis of the existing pipe P. Turn to.

  A fitting unit 20 is connected to the tip of the arm 19a. As shown in FIG. 6, a positioning unit 30 is connected to the side of the fitting unit 20. A feed unit 40 is connected to the tip of the arm 19b. Guide units 50 are connected to the ends of the arms 19c and 19d, respectively.

  The pipe making apparatus 100 spirals the units 20, 30, 40, 50 in the existing pipe P by turning the arms 19 a, 19 b, 19 c, 19 d by the turning unit 13 while traveling by the traveling unit 12. Advance in the tube axis direction.

  The guide unit 50 is provided with a plurality of rollers (reference numerals omitted). The guide unit 50 spirals in the existing pipe P in the direction of the pipe axis (advances to the right in FIG. 5), and feeds the strip 1 fed from the outside into the existing pipe P between the rollers. Guide to unit 40.

  The feed unit 40 is provided with a plurality of rollers, an electric motor, a transmission mechanism, and the like (reference numerals omitted). The feed unit 40 spirally advances in the existing pipe P in the pipe axis direction, passes the strip 1 guided from the guide unit 50 between the rollers, and sends the strip 1 to the inner surface of the existing pipe P at a predetermined angle. As a result, the strip 1 is spirally wound in the existing pipe P.

  The fitting unit 20 is provided with a pressing roller 21. As shown in FIG. 6, the positioning unit 30 is connected to the fitting unit 20 on the feed unit 40 side by a link mechanism 60. The fitting unit 20 and the positioning unit 30 advance in the pipe axis direction spirally within the existing pipe P.

  At that time, the positioning unit 30 moves the strips 1 spirally wound by the feed unit 40 in the width direction, and positions adjacent winding side edges 1d (FIG. 7) of the strips 1 at a predetermined interval. The fitting unit 20 moves the fitting portion 2c of the joiner 2 fed into the existing pipe P from the outside to the fitting portion 1c of the winding side edge 1d of the strip 1 positioned by the positioning unit 30, and presses the pressing roller 21. To fit. The joiner 2 is sent to the vicinity of the fitting unit 20 through the supply pipe 16 from the rear side (left side in FIG. 5) of the pipe making apparatus 100.

  The pipe making apparatus 100 assembles the tubular body R by winding the strip 1 spirally in the existing pipe P and joining the adjacent winding side edges of the strip 1 with the joiner 2.

  The nozzle 8 for injecting the backing material M and the hose 9 shown in FIG. 8 are connected. The hose 9 is connected to a supply device (not shown) installed outside the existing pipe P. The nozzle 8 and the hose 9 are inserted into the gap S between the existing pipe P and the carbon fiber lattice line 6. By pulling the hose 9, the nozzle 8 moves in the direction of the pipe axis of the existing pipe P. The distance between the existing pipe P and the carbon fiber lattice reinforcement 6, that is, the height from the inner surface of the existing pipe P to the apex 3 c (FIG. 4, etc.) of the support member 3 that supports the carbon fiber lattice reinforcement 6 is It is larger than the diameter. The diameter of the hose 9 is smaller than the diameter of the nozzle 8.

  The backing material M is made of a cement-type chemical solution that hardens in a short time, has high fluidity, and has no volume change. The backing material M mixed and stirred by the supply device is supplied to the nozzle 8 through the hose 9 and injected at a predetermined pressure from the injection port 8a of the nozzle 8 to be filled between the existing pipe P and the tubular body R. Is done.

  Next, a pipe rehabilitation method according to an embodiment of the present invention will be described with reference to FIGS.

  First, as shown in FIGS. 1 to 4, a plurality of support members 3 are temporarily fixed to the inner surface of the existing pipe P at a predetermined interval while the longitudinal direction of the support member 3 is directed to the pipe axis direction of the existing pipe P. Then, the carbon fiber lattice reinforcement 6 is mounted on the support member 3 in parallel with the inner surface of the existing pipe P with a gap S therebetween, and the inner surface of the existing pipe P is spaced at a predetermined interval over the entire circumference. Cover with 6.

  Next, the pipe making apparatus 100 is installed in the existing pipe P. Then, as shown in FIGS. 5 and 6, the strip 1 is spirally wound by the pipe making device 100 inside the carbon fiber lattice 6, and the adjacent winding side edges of the strip 1 are joined by the joiner 2. As a result, the tubular body R is assembled.

  After assembling the tubular body R, the pipe making apparatus 100 is removed from the existing pipe P. Thereafter, as shown in FIG. 8, a nozzle 8 and a hose 9 for injecting the backing material are inserted into the gap S between the existing pipe P and the carbon fiber lattice reinforcement 6. Then, while moving the nozzle 8 and the hose 9 in the direction of the tube axis of the existing pipe P, the backing material M is injected at a predetermined pressure from the injection port 8a of the nozzle 8, and between the tubular body R and the existing pipe P. Is filled with the backing material M. After filling, the nozzle 8 and the hose 9 are pulled out from the gap S between the existing pipe P and the carbon fiber lattice line 6.

  Thereafter, the backing material M is cured after a predetermined time, so that the existing pipe P, the tubular body R, the carbon fiber lattice reinforcement 6 and the support member 3 are backed up as shown in FIGS. 9 and 10. Integrated with M, the existing pipe P is rehabilitated.

  On the other hand, when the existing pipe P is, for example, a sewer pipe, and a liquid such as sewage flows in the existing pipe P, the support member 3 is temporarily fixed as described above while the liquid flows. The process, the installation process of the carbon fiber lattice 6 and the assembly process of the tubular body R by the pipe making apparatus 100 are performed. In FIGS. 1, 2, 5, and 6, the liquid flows in a portion indicated by cross hatching below the broken line.

  Then, after assembling the tubular body R and removing the pipe making apparatus 100 from the existing pipe P, the liquid is guided to the inside of the tubular body R so that the liquid flows in the tubular body R (see FIG. 9 and FIG. 9). In FIG. 10, a portion indicated by cross hatching below the broken line). Note that the liquid interposed between the existing pipe P and the tubular body R flows downstream along the gradient of the existing pipe P.

  After a while, when the liquid is removed from between the existing pipe P and the tubular body R, the backing material M is filled between the tubular body R and the existing pipe P as described above. And as mentioned above, the backing material M is hardened and the existing pipe P is rehabilitated.

  According to the above embodiment, the carbon fiber lattice reinforcement 6 is connected between the existing pipe P and the tubular body R via the plurality of support members 3 without installing a spacer on the inner surface of the existing pipe P. It is interposed in parallel with the inner surface of. For this reason, the clearance gap S equivalent to the height of the supporting member 3 can be ensured between the existing pipe P and the carbon fiber lattice reinforcement 6. Then, the backing material M is injected from the gap S, and the backing material M is spread to the back side of the tubular body R through the gaps between the carbon fiber lattice bars 6, and between the existing pipe P and the tubular body R. The backing material M can be filled.

  In particular, on the back side of the tubular body R (the inner surface side of the existing pipe P), the leg portions 1a, 1b, and 2a of the strip 1 and the joiner 2 extend in a spiral shape, thereby blocking the flow of the backing material M. There is a risk of becoming. However, if the gap S is secured between the existing pipe P and the carbon fiber lattice reinforcement 6 as in the above embodiment, the backing material M injected from the gap S is used as the lattice of the carbon fiber lattice reinforcement 6. In between the strip 1 and the legs 1a, 1b, 2a of the joiner 2 or between the adjacent legs 1a, 1b, 2a from between the legs 1a, 1b, 2a Thus, the backing material M can be spread over every corner between the existing pipe P and the tubular body R.

  Further, since the carbon fiber lattice reinforcement 6 supports the tubular body R from the circumferential direction, it is possible to prevent the tubular body R from being lifted and moved by buoyancy due to the backing material M.

  In addition, since the interval between the existing pipe P and the tubular body R is constant over the entire circumference, the cured state of the backing material M filled between the existing pipe P and the tubular body R is made uniform. Can do. For this reason, as shown in FIG. 10, the inner space K of the existing pipe P after rehabilitation is not decentered and becomes a perfect circle, and the strength of the existing pipe after rehabilitation is made uniform over the entire circumference. The effective cross section (the cross section of the inner space K) can be increased. In addition, since the rehabilitation thickness of the existing pipe P is reduced, the amount of advancement of the pipe rehabilitation method can be increased.

  Further, after the tubular body R is assembled, the support member 3 is pressed against the inner surface of the existing pipe P through the carbon fiber lattice reinforcement 6 by the extension force of the strip 1 and the joiner 2, and after the backing material M is cured. The existing pipe P, the tubular body R, the carbon fiber lattice 6 and the support member 3 are integrated. For this reason, it is only necessary to temporarily fix the support member 3 for attaching the carbon fiber lattice reinforcement 6 to the inner surface of the existing pipe P by a simple means such as the pressing piece 4 or the screw 5 until then. As a result, it is not necessary to use a strong fixture such as an anchor bolt, the stress generated in the existing pipe P can be reduced, and damage to the existing pipe P can be suppressed.

  Further, in the above embodiment, the support member 3 is temporarily fixed to the inner surface of the existing pipe P with the longitudinal direction of the support member 3 facing the pipe axis direction of the existing pipe P. For this reason, it is not necessary to bend the support member 3 according to the curvature of the existing pipe P, and the linear support member 3 can be fitted along the inner surface of the existing pipe P without a gap. As a result, the support member 3 can prevent the interval between the existing pipe P and the tubular body R from expanding and reducing the effective cross section of the existing pipe P after rehabilitation. Moreover, the cost concerning the support member 3 can be kept low, and the construction cost can be reduced accordingly.

  In the above embodiment, after assembling the tubular body R, the nozzle 8 and the hose 9 are inserted into the gap S between the existing pipe P and the carbon fiber lattice reinforcement 6, and the backing material M is inserted from the inlet 8 a of the nozzle 8. Injecting. For this reason, it becomes easy for the backing material M to reach the back side of the tubular body R from the gap S between the existing pipe P and the carbon fiber lattice reinforcement 6 through the lattice of the carbon fiber lattice reinforcement 6, and the existing pipe P and the tubular body. The backing material M can be reliably filled with R.

  Moreover, in the said embodiment, even when the liquid is flowing in the existing pipe P, the pipe rehabilitation method can be applied with the liquid flowing, and facilities such as a temporary water distribution and a temporary closed waterway are separately provided. There is no need to provide. Further, since the liquid is allowed to flow inside the tubular body R after the assembly of the tubular body R, it is possible to prevent the backing material M filled between the tubular body R and the existing pipe P from being diluted with the liquid. it can.

  Moreover, in the said embodiment, the width | variety of the transversal direction of the supporting member 3 is smaller than the lattice space | interval of the carbon fiber lattice reinforcement 6, as FIG. 4 shows. For this reason, the backing material M injected from between the existing pipe P and the carbon fiber lattice reinforcement 6 passes between the lattice of the carbon fiber lattice reinforcement 6 and the support member 3, and the carbon fiber lattice reinforcement 6 and the tubular body R The backing material M can be easily filled between the existing pipe P and the tubular body R.

  In the above embodiment, the support member 3 is provided with a plurality of holes 3a and 3b. For this reason, the backing material M injected from between the existing pipe P and the carbon fiber lattice reinforcement 6 is distributed through the plurality of holes 3 a and 3 b of the support member 3, so that the existing pipe P and the tubular body R are interposed. Further filling can be facilitated.

  Furthermore, in the said embodiment, the height of the supporting member 3 from the inner surface of the existing pipe P is made larger than the diameter of the nozzle 8 and the diameter of the hose 9. For this reason, while inserting the nozzle 8 and the hose 9 into the gap S between the existing pipe P and the carbon fiber lattice reinforcement 6 and moving the nozzle 8 and the hose 9, the backing material M is injected, and the existing pipe P and The space between the tubular body R can be quickly filled.

  The present invention can employ various embodiments other than those described above. For example, in the supply device for the backing material M, short fibers such as polypropylene may be mixed into the backing material M. As the short fibers, those which are quickly mixed into the backing material M and are difficult to form a fiber mass are preferable. Then, in the pipe rehabilitation method, after assembling the tubular body R in the existing pipe P, the backing material M mixed with the short fibers is interposed between the existing pipe P and the tubular body R via the hose 9 and the nozzle 8. To fill.

  Accordingly, as shown in FIG. 11, the short fibers B mixed in the backing material M are applied to the carbon fiber lattice 6, the support member 3, the legs 1 a and 1 b of the strip 1, and the legs 2 b of the joiner 2. Tangle. As a result, after the backing material M is cured, the bonding strength between the backing material M and the carbon fiber lattice reinforcement 6, the support member 3, the strip 1, and the joiner 2 is increased, and the strength of the existing pipe P after the rehabilitation is increased. Can be further increased.

  Moreover, in the said embodiment, the nozzle 8 and the hose 9 were inserted in the clearance gap S between the existing pipe P and the carbon fiber lattice reinforcement 6, and the backing material M was filled between the tubular body R and the existing pipe P. However, the present invention is not limited to this. Other than this, for example, the tubular body R is drilled from the inside by a drill or the like, and the backing material M is filled between the tubular body R and the existing pipe P by the nozzle or hose for injecting the backing material through the hole. You may do it. In this case, the location and number of holes to be perforated in the tubular body R may be appropriately set in consideration of the size of the tubular body R and the gap S.

  Moreover, in the said embodiment, although the example which used the equilateral mountain type steel as the supporting member 3 was shown, this invention is not limited to this. In addition to this, for example, a support member 18 made of a round bar as shown in FIGS. 12 and 13 may be used.

  In this case, at least both ends of the support member 18 may be temporarily fixed to the inner surface of the existing pipe P using the pressing piece 4 and the screw 5. Further, the support member 18 and the carbon fiber lattice line 6 may be fixed by being bound by the binding member 7. Further, the width of the support member 18 may be made smaller than the lattice spacing of the carbon fiber lattice reinforcement 6. Moreover, what is necessary is just to make the height of the supporting member 18 from the inner surface of the existing pipe P larger than the diameter of the nozzle for injection | pouring of the backing material M, and a hose. The material of the support member 18 is, for example, metal, resin, or wood.

  The height from the inner surface of the existing pipe P of the support member 18 shown in FIG. 13 is lower than the height from the inner surface of the existing pipe P of the support member 3 shown in FIG. That is, since the gap S between the existing pipe P and the carbon fiber lattice reinforcement 6 becomes narrower when the support member 18 is used than when the support member 3 is used, the renewal thickness of the existing pipe P becomes thinner. The effective cross section of the existing pipe P after rehabilitation becomes large. Thus, by changing the height of the support member, the rehabilitation thickness of the existing pipe P and the size of the effective cross section of the existing pipe P after rehabilitation can be adjusted.

  Moreover, in the said embodiment, although the longitudinal direction of the supporting member 3 was orient | assigned to the pipe-axis direction of the existing pipe P, the example which temporarily fixed the supporting member 3 to the inner surface of the existing pipe P was shown, However, This invention is limited to this. Not what you want. In addition to this, for example, the support member 3 may be temporarily fixed to the inner surface of the existing pipe P with the longitudinal direction of the support member 3 oriented in the circumferential direction of the existing pipe P or a direction inclined with respect to the pipe axis. . Further, the support member 3 may be temporarily fixed to the inner surface of the existing pipe P continuously or discontinuously.

  Moreover, in the said embodiment, although the example which temporarily fixed the supporting member 3 to the inner surface of the existing pipe P with the pressing piece 4 and the bis | screw 5 was shown, this invention is not limited to this. In addition to this, for example, the support member 3 may be temporarily fixed to the inner surface of the existing pipe P using a simple fixing member such as a small peg or a nail. That is, the means for temporarily fixing the support member 3 may be any means that reduces the stress generated in the existing pipe P when it is attached to the inner surface of the existing pipe P.

  Moreover, in the said embodiment, although the example using the carbon fiber lattice reinforcement 6 was shown as a reinforced fiber lattice reinforcement, this invention is not limited to this. Other than this, for example, it is composed of inorganic fibers such as carbon, glass and ceramic, metal fibers such as titanium and steel, organic fibers such as aramid, polyester and polyamide, or a mixture of these fibers. Reinforcing fiber lattices may be used.

  Moreover, in the said embodiment, although the example using the strip 1 and the joiner 2 was shown as a pipe structural member, this invention is not limited to this. In addition to this, for example, a long belt-like body in which a tenon is provided on one side edge in the width direction and a tenon groove is provided on the other side edge may be used as the tube constituent member. In this case, the tubular body may be assembled by winding the belt-like body spirally and fitting the tenons of the adjacent winding side edges into the tenon grooves to join the adjacent winding side edges.

  Moreover, in the said embodiment, although the example which assembled the tubular body R using the pipe manufacturing apparatus 100 was shown, this invention is not limited to this. The assembly of the tubular body R may be performed manually using another machine or tool. However, by assembling the tubular body with the pipe manufacturing apparatus 100, it is possible to reduce human power and increase the amount of daily advancement.

  Furthermore, in the above embodiment, the example in which the present invention is applied when rehabilitating a circular existing pipe P has been described. However, when rehabilitating other existing pipes such as a rectangle or a horseshoe shape, the pipe rehabilitation of the present invention is also performed. It is possible to apply the construction method.

DESCRIPTION OF SYMBOLS 1 Strip 2 Joiner 3 Support member 4 Pressing piece 5 Screw 6 Carbon fiber lattice line B Short fiber M Backing material P Existing pipe R Tubular body S Crevice

Claims (4)

A long band-shaped tube constituent member is spirally wound in an existing pipe, a tubular body is assembled, a backing material is filled between the existing pipe and the tubular body, and the backing material is cured. In the pipe rehabilitation method for integrating the existing pipe and the tubular body and rehabilitating the existing pipe,
A plurality of support members extending in the longitudinal direction are temporarily fixed to the inner surface of the existing pipe at a predetermined interval,
On the support member, a reinforcing fiber lattice is attached in parallel with the inner surface of the existing pipe with a gap therebetween,
A pipe rehabilitation method comprising assembling the tubular body inside the reinforcing fiber lattice. In the pipe rehabilitation method according to claim 1,
A pipe rehabilitation method characterized by temporarily fixing the support member to the inner surface of the existing pipe with the longitudinal direction of the support member facing the pipe axis direction of the existing pipe. In the pipe rehabilitation method according to claim 1 or claim 2,
Temporarily fixing the support member to the inner surface of the existing pipe by pressing the support member on the inner surface of the existing pipe with a pressing piece and attaching the pressing piece to the inner surface of the existing pipe with screws, screws, or bolts; Pipe rehabilitation method characterized by that. In the pipe rehabilitation method according to any one of claims 1 to 3,
A pipe rehabilitation method characterized in that short fibers are mixed into the backing material.

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