JP2009085004A - Repair method of existing pipelines, repair materials used therefor, and pipelines - Google Patents

Abstract

[PROBLEMS] To obtain a sufficiently high-strength pipe even when external water pressure or the like does not directly act only on an inner surface member forming the inner face of the pipe after repair, and the existing pipe itself is weak. And a method of repairing an existing pipe line, which can provide a margin for the dimensions of the reinforcing body and the inner surface member, and can improve the degree of freedom in selecting the material of the inner surface member, and the repair material and the method. Provide the resulting conduit.
A reinforcing member 11 having a fitting recess is assembled in an existing pipe line to assemble a hollow frame reinforcing body, and a fitting member 2 is attached to each of the plurality of fitting recesses on the inside thereof. By assembling a plurality of inner surface members 3 to the fitting member 2 to form a cylinder along the tube length direction of the existing pipe line, between the inner surface member 3 and the inner surface of the existing pipe P Inject a curable filler in the voids.
[Selection] Figure 11

Description

  The present invention relates to a method for repairing an existing pipeline that has been deteriorated with a repair material, a repair material used in the repair method, and a pipeline that has been repaired by the above-described method. The present invention relates to a method, a repair material, and a repaired pipeline suitable for repairing a rainwater pipeline or a tunnel used for various transportation facilities.

As a method of repairing existing pipelines such as large-diameter sewer pipelines, conventionally, a steel bar or other elastic spring rod is wound spirally along the inner surface of the existing pipeline, A method of forming a cylindrical liner by spirally winding a resin plate and injecting a curable filler (backing material) such as mortar between the liner and the inner surface of an existing pipe ( see, for example, Patent Document 1 ) Alternatively, a long reinforcing body including a reinforcing bar is previously locked to a flexible belt-shaped resin plate that is to be spirally wound in an existing pipe to become a cylindrical liner, and the resin plate is A method is known in which a liner is formed by spirally winding along an existing pipe inner surface, and a backfilling material such as mortar is injected between the liner and the existing pipe inner surface ( see, for example, Patent Document 2 ). .
JP-A-8-2777992 JP-A-10-166444

  By the way, all the above-described conventional methods for repairing existing pipelines use reinforcing bars to increase the strength of the pipe after repair, but these have the following problems.

According to the prior art disclosed in Patent Document 1 , rebars such as piano wires are not engaged with the resin plate, and therefore the resin plate itself is not reinforced, so it is applicable for repairing buried pipes. In this case, if a crack occurs in the curable filler such as a mortar layer due to vibrations caused by vehicle traffic or an earthquake, the external water pressure acts directly on the resin plate, and the curable filler layer such as mortar and the resin plate resin plate is likely to bulge into conduit surface in weak adhesion strength points.

On the other hand, according to the prior art disclosed in Patent Document 2 , the resin plate is preliminarily combined with the reinforcing body including the reinforcing bars, but the resin plate needs to be spirally wound in the existing pipeline. As the reinforcing body, one having sufficient rigidity cannot be used, and when the existing pipe line itself is weak, reinforcement against earth pressure is insufficient.

  Moreover, in the above-described conventional repair methods for existing pipelines, it is difficult to say that the resin plate is sufficiently reinforced, and when injecting mortar or the like between the existing tube and the liner, It is necessary to take measures to lay support work so that the spirally wound resin plate is not deformed by the pressure, or to perform backfilling with mortar etc. several times, and the construction is complicated However, there is a drawback that the required time becomes longer.

  The present invention has been made in view of such circumstances, and external water pressure does not directly act on an inner surface member such as a resin plate that forms the inner surface of a pipeline after repair. It can be reinforced sufficiently even if the strength is weak, and it can be easily installed without requiring any measures such as setting up a support when injecting curable fillers (backfilling materials) such as mortar. It aims at providing the repair method of a pipe line, the repair material used for the method, and the pipe line obtained by the said repair method.

In order to achieve the above object, the repair method for an existing pipe of the present invention is substantially along the inner surface of the existing pipe using a plurality of reinforcing members that can be carried into the existing pipe and have fitting recesses. A hollow frame-shaped reinforcing body is assembled, and a fitting member is attached to each of the plurality of fitting recesses inside the reinforcing body, and a plurality of inner surface members are fitted to the fitting member. It is characterized by injecting a curable filler into the gap between the inner surface member and the existing inner surface of the pipe after assembling into a cylindrical shape along the tube length direction of the pipe (Claim 1).

Here, in the repair method of the existing pipe line of this invention, it is preferable that said fitting member is a long member continuous in the cylinder length direction of the existing pipe line (Claim 2 ).

Moreover, in the repair method of the existing pipeline of this invention, it is desirable to use the elongate body continuous in the cylinder length direction of the existing pipeline as the said inner surface member (Claim 3 ).

In the existing pipe line repairing method of the present invention, the reinforcing body is formed by arranging a plurality of ring-shaped reinforcing members having a shape substantially along the inner peripheral surface of the existing pipe at predetermined intervals in the cylinder length direction of the existing pipe line. And a method of assembling each ring-shaped reinforcing member by integrating them with each other in the tube length direction of the existing pipe line by the connecting member (Claim 4 ).

In the method of the present invention, the reinforcing body is assembled in advance by a ring-shaped reinforcing member and a connecting member that are divided in advance in the circumferential direction outside the existing pipe, and then the partial reinforcing body is placed in the existing pipe. It is possible to suitably employ a method of carrying in and assembling (Claim 5 ).

In the present invention method, it provided Matsume member on the outer periphery of the reinforcing member, be not less properly the gap between the reinforcing member and the existing pipe periphery (claim 6) is desirable by during filling member.

In the present invention method, the existing pipe surface, after placing the existing pipe surface along a cylindrical outer surface material, it is possible to employ a method (claim 7) for assembling the reinforcing member.

On the other hand, the repair material for existing pipe line repair of the present invention is a repair material suitable for use in the method invention according to each of the above claims, and the repair material of the invention according to claim 8 is described in claim 1. A repair material for use in such a method invention, comprising a plurality of recessed recesses for fitting inside, a plurality of circumferentially divided ring-shaped reinforcing members assembled into a hollow frame structure substantially along the inner surface of an existing pipe line A plurality of fitting members formed with a reinforcing body formed on the outside, a first fitting portion fitted into the fitting recess, and a second fitting portion formed on the inside; and an outer surface or an end portion Further, it is characterized in that the inner surface on which the fitting portion to be fitted to the second fitting portion is formed is composed of a plurality of smooth inner surface members. In using such a fitting member, it is desirable that each fitting member be a long member continuous in the tube length direction of the existing pipe line (Claim 9).

Moreover, it is desirable that the inner surface member used in the repair material for repairing the existing pipe line of the present invention is a long body continuous in the cylinder length direction of the existing pipe line (Claim 10 ).

Further, in the repair material according to the present invention, a plurality of ring-shaped reinforcing members having a shape substantially along the inner peripheral surface of the existing pipe for disposing a predetermined interval in the cylinder length direction of the existing pipe as the reinforcing body. It is further desirable to have a plurality of connecting members that are connected and integrated with each other (claim 11 ).

Moreover, in the repair material of this invention, it is preferable to form the unevenness | corrugation for forming the groove-shaped space | gap which continues at least in the existing pipe cylinder length direction on the outer periphery of a reinforcement body (Claim 12 ), In addition to this, or in addition to this, it is preferable to form a hole penetrating in the longitudinal direction of the existing pipe tube in the reinforcing body (claim 13 ).

Furthermore, the repair material of the present invention includes a filling member that can be attached to the outer periphery of the reinforcing body and that reduces or eliminates a gap between the inner surface of the existing pipe line by the attachment (claim). 14 ).

And the pipe line of the present invention is a pipe line after being repaired by the repair method of the existing pipe line of the present invention, and the hollow frame reinforcing material substantially along the inner surface of the existing pipe is provided in the existing pipe line. The fitting members are respectively attached to the plurality of fitting recesses formed on the inner side of the reinforcing material, and the plurality of inner surface members that are continuous in the tube length direction of the existing pipe line are connected via the fitting members. It is attached to the reinforcing member in a state of being arranged in a cylindrical shape extending along the tube length direction, and is characterized by filling a curable filler between the inner surface member and the existing pipe inner surface. (Claim 15 ).

Moreover, in the pipe line of this invention, it is preferable that said fitting member shall be a fitting member which consists of a long member continuous in the cylinder length direction of the existing pipe line (Claim 16 ).

Further, in the pipe line of the present invention, the reinforcing body is connected to and integrated with a plurality of ring-shaped reinforcing members substantially along the inner peripheral surface of the existing pipe, and each ring-shaped reinforcing member in the tube length direction of the existing pipe line. It is preferable to include a plurality of connecting members to be converted (claim 17 ).

Further, in the pipe line of the present invention, a structure in which a hole penetrating in the cylinder length direction of the existing pipe line is formed in the reinforcing body and a curable filler is filled in the hole is suitably used (claim 18 ). Can be adopted.

In yet conduit of the present invention may also be in between the reinforcing member and the existing pipe surface, adopting the inner surface along a cylindrical outer surface material is interposed structure of the existing pipe (claim 19) .

  The present invention is necessary as a reinforcing body by attaching an inner surface member that forms the surface (inner surface) of a pipe line after repair to a reinforcing body assembled in a hollow frame shape substantially along the inner surface of the existing pipe line. In order to achieve the intended purpose, the reinforcing member receives the force acting on the inner surface member with sufficient strength according to the above.

Here, in the present invention, the means for attaching the inner surface member to the reinforcing material is a fitting with a fitting member interposed.

The repair method (Claim 1) of the existing pipe line and the repair material (Claim 8 ) used in the repair method of the present invention are a hollow frame-shaped reinforcement body in which the divided reinforcing members are substantially along the inner surface of the existing pipe. Therefore, depending on the conditions of the existing pipeline, the shape and dimensions of the reinforcing member can be changed as appropriate, and a reinforcing body with sufficient strength can be built in the existing pipeline according to the degree of damage. Even if the existing pipe line loses strength, it can be reliably reinforced, and the pipe line after repair can exhibit the same strength as the reinforcing bar structure.

  Moreover, in the method of this invention which assembles a reinforcement member in a hollow frame-shaped reinforcement body in an existing pipe line, it can respond easily also to deformed pipe lines, such as a horseshoe-type pipe line. At the same time, as a result of the strength of the reinforcing body being sufficient, as a curable filler (backing material), it is possible to select a material with good fluidity and low cost, such as a mortar or air mortar with a high moisture ratio, It can be a low cost and excellent workability method.

In the present invention, since the inner surface member is attached to and supported by the reinforcing body via the fitting member , external water pressure or the like does not act directly on the inner surface member, and curable filling Even when the material is injected, there is no need to take measures such as forming a support work or adding and adding the material, and the construction can be performed easily and in a short time.

Further, the invention method according to claim 1, repair material according to claim 8, and the line according to claim 15, since attaching the inside member through the engaging member relative to the reinforcing member, the inside member in a rigid Compared to the case where it is directly fitted to a certain reinforcing body, it is possible to give a margin to the size of the fitting portion between the reinforcing body and the inner surface member, improving workability and making the material of the inner surface member into the pipe line. The degree of freedom to select according to the required function is improved. For example, if a thermoplastic resin molded product is used as the fitting member, it is possible to use a rigid body for the inner member, and the repair material such as flame retardancy can be used. Functions can be added.

When such a fitting member is used, a plurality of fitting members that are continuous in the cylinder length direction of the existing pipe line are employed as in the method and the repair material according to claim 2 and claim 9 , and claim 16. If the pipe line is constructed, it is possible to provide a structure that reinforces the inner surface member that is attached between the plurality of reinforcing members that constitute the reinforcing body, prevents deformation of the inner surface member, and enables use of a thinner inner surface member. Become. In addition, there is an advantage that a seamless watertight structure can be easily obtained by using a fitting member that is continuous in a tube length direction of an existing pipeline, for example, with a length extending between adjacent manholes.

Further, like the method of the invention according to claim 3 and the repair material of the invention according to claim 10 , the inner surface member is continuous in the cylinder length direction of the existing pipe line, and a plurality of long bodies are used to form a cylinder. When the pipe of the invention according to claim 15 is constructed, a seamless pipe can be obtained in the cylinder length direction, and the flowability of the in-pipe matter can be greatly improved. In this case, the inner surface member is divided into a plurality of circumferential pipes in the circumferential direction of the existing pipes, such as horseshoe-shaped pipes, box culverts (rectangular pipes), or deformed pipes such as tunnels having various cross-sectional shapes. An inner surface member having the same shape and size as the above can be applied. Therefore, it can arrange | position easily according to pipe cross-sectional shape, and workability | operativity improves.

As in the inventions according to claim 4 and claim 11 , as the reinforcing body, a plurality of ring-shaped reinforcing members having a shape substantially along the inner peripheral surface of the existing pipe are provided at predetermined intervals in the cylinder length direction of the existing pipe line. If it arrange | positions, the pipe line which can oppose the external pressure reinforcement of a pipe line effectively can be obtained. Further, when the ring-shaped reinforcing member is connected and integrated in the cylinder length direction of the existing pipe line by the connecting member, and the pipe line of the invention according to claim 17 is constructed, a state in which the core is formed in the existing pipe line Thus, the strength of the structure can be extremely increased. Further, by adjusting the length of the connecting member between the ring-shaped reinforcing members, the gap shape between the ring-shaped reinforcing members can be made to have a square shape, and can correspond to the bending of the existing pipe line. In addition, it is possible to cope with a step by forming a letter C and an inverted letter C.

  Further, like the invention according to claim 5, by using the connecting member, the ring-shaped reinforcing member is divided into, for example, three in the circumferential direction, and the divided body and the connecting member are used outside the pipeline. For example, a method in which a partial reinforcing body that is divided into three in the circumferential direction and has a length that can be easily brought into an existing pipeline is assembled in advance, and a plurality of the partial reinforcing bodies are brought into the pipeline and incorporated. As a result, the assembly time can be shortened, and when applied to a deformed pipe, for example, a corner portion that is difficult to assemble can be assembled in advance outside the pipe, so that workability is improved.

If the method of the invention according to claim 6 and the repair material of the invention of claim 14 are adopted and the space between the reinforcing material and the existing pipe inner surface is reduced or eliminated by the clogging member, the clogging will occur. By attaching the member to the top of the reinforcing body, it is possible to prevent the reinforcing body from being lifted by the buoyancy when the curable filler is injected. Further, by attaching the filling member to the side portion of the reinforcing body, the reinforcing body functions so as to be restrained by stretching the reinforcing body in the vertical direction against the inner surface of the existing pipe, and the reinforcing body is hardly deformed.

In addition, as in the case of the method of the invention according to claim 7 and the pipe line of the invention of claim 19 , by arranging a cylindrical outer surface material on the inner surface of the existing pipe in advance, the existing pipe is severely damaged. In addition, it is possible to prevent the curable filler from escaping out of the pipeline, and it is possible to prevent the groundwater from coming into contact with the curable filler. Therefore, the physical properties of the curable filler such as mortar do not deteriorate depending on the condition of the existing pipeline. In addition, by using a water-permeable material for the outer surface material and using a cement-based material such as mortar for the curable filler, excess moisture and air during the injection of the curable filler are filtered out. The cementitious material in the outer surface material is in a compacted state, forming a state that is not easily affected by groundwater even before complete curing, and reliably exhibits high strength after curing. it can.

If the groove | channel-shaped unevenness | corrugation which continues at least in the cylinder length direction of an existing pipe line is provided in the outer periphery of a reinforcement body like the repair material of the invention which concerns on Claim 12 , the inner peripheral surface of an existing pipe, a reinforcement body, Since a gap that is continuous in the cylinder length direction is formed, the resistance during injection of a curable filler such as mortar is reduced. Moreover, the formation of such irregularities is also effective in reducing the weight of the reinforcing body.

Further, as in the repair material of the invention according to claim 13 , even when a hole penetrating the reinforcing body in the tube length direction is formed, the resistance at the time of injecting the curable filler is reduced in the same manner as described above. It is effective to reduce the weight of the reinforcing body, and when such a repaired body is used to construct the pipe line of the invention according to claim 21, the hole of the reinforcing body and the curability cured inside thereof Due to the anchor effect of the filler, the bonding force between the curable filler and the reinforcing material can be increased.

  According to the present invention, a hollow frame-shaped reinforcing body is assembled in an existing pipe line, and an inner surface member is attached to the reinforcing body by a technique such as fitting, between the existing pipe inner surface and the inner surface member. Since it is filled with a curable filler, the shape and dimensions of the reinforcing members that make up the reinforcement are appropriately changed according to the conditions such as the shape and strength of the existing pipe line, and sufficient strength according to the degree of damage, etc. The reinforcement body which has can be constructed | assembled. Therefore, even after repairing a pipeline that cannot be expected to have strength such as an existing pipeline that has deteriorated or a large-diameter pipe such as a tunnel, the pipeline after repair can have high strength.

  In addition, since the strength of the reinforcing body can be sufficiently increased, it is possible to select an inexpensive material with good fluidity as the curable filler, and it is possible to realize good workability and low cost. In this case, even if there is a step or bend in the middle of the existing pipe line, it can be easily handled, and a reinforcing body corresponding to the shape is also applied to deformed pipes such as horseshoe pipes and box culvert pipes. It can be assembled and repaired with good workability. Moreover, since the material of the inner surface member is a thermoplastic resin molded product, the inner surface member is easily deformed with respect to the arrangement of the reinforcing body, so that the inner surface of the pipeline after repair can be made smooth.

  Further, in the present invention, since the inner surface member is supported by fitting or the like with respect to the reinforcing body, external water pressure or the like does not directly act only on the inner surface member, and there is no possibility that the inner surface member is deformed. In addition, even when the curable filler is injected, the injection pressure can be withstood, and it is not necessary to take a measure such as setting a support as in the prior art, and the construction period can be shortened.

  And, as the inner surface member, along the tube length direction of the existing pipe line, for example, by using a long body having a length between the manhole and the manhole, the pipe inner face (surface) is seamless in the flow-down direction. Compared with the case where the inner surface member is arranged in a spiral shape, the flow-down performance can be significantly improved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
First, an environment where people can work in the pipeline is created by an appropriate method according to the amount of sewage in the sewer pipeline to be repaired. For example, a water stop plug is installed on the upstream side of the pipeline to be repaired to block sewage.

  Next, FIG. 1 is a sectional view taken along the radial direction of the existing pipeline (hereinafter, the sectional view in this direction is referred to as a transverse sectional view), and FIG. As shown in a cross-sectional view taken along the line (hereinafter, a cross-sectional view in this direction is referred to as a longitudinal cross-sectional view), a plurality of ring-shaped reinforcing members 11 and the tubes of the existing pipe P are provided inside the existing pipe P. A plurality of connecting members 12 that are connected and integrated at regular intervals in the longitudinal direction are carried in from a manhole (not shown) or the like, and the hollow frame-shaped reinforcing body 1 is assembled. In this case, the ring-shaped reinforcing member 11 and the connecting member 12 may be assembled on the ground in advance so that they can be carried into the existing pipe P. The outer shape of the reinforcing body 1 is a shape substantially along the inner surface shape of the existing pipe P. In the case of the existing pipe P having a circular cross section as in this example, the outer shape of the reinforcing body 1 is a cylindrical shape. Further, the outer diameter dimension of the reinforcing body 1 is set to be slightly smaller than the inner diameter dimension of the existing pipe P in consideration of the level difference or bending of the existing pipe P.

  In this example, the ring-shaped reinforcing member 11 is obtained by assembling three arc-shaped segments 11a, 11b, and 11c to each other by a coupling member 11d, and assembling them in a ring shape substantially along the inner surface of the existing pipe P as a whole. The material is a highly rigid material, such as steel, and may be subjected to a surface treatment to improve durability. A plurality of fitting recesses 110 for fitting fitting members 2 to be described later are formed at equal intervals in the circumferential direction on the inner circumference of each ring-shaped reinforcing member 11, and the outer circumference has a circumferential circumference. Concavities and convexities 111 that are uniformly continuous in the direction are formed. Each recessed portion 110 for fitting has a substantially central portion in the depth direction and a narrow opening portion. Furthermore, through-holes 112 penetrating in the cylinder length direction are formed in each ring-shaped reinforcing member 11 at regular intervals in the circumferential direction.

  The connecting member 12 includes a pipe member 12a that is disposed between the ring-shaped reinforcing members 11 adjacent to each other in the cylinder length direction and serves as a spacer, a bolt 12b that has male screws formed at both ends, and a nut that is screwed into each male screw. The bolt 12b is inserted into the pipe member 12a interposed between the adjacent ring-shaped reinforcing members 11, and the male screws at both ends thereof are respectively inserted into the through holes 112 of the ring-shaped reinforcing member 11. In this state, the nuts 12c are screwed into the male threads, whereby the ring-shaped members 11 are connected and integrated with each other. Here, the number of through holes 112 of the ring-shaped reinforcing member 11 is larger than the number of bolts 12b of the connecting member 12 inserted. Therefore, even after the reinforcing body 1 is assembled, each ring-shaped reinforcing member 11 includes A plurality of through holes 112 remain. Further, when the existing pipe P is bent, as shown in FIG. 3, the length of the pipe material 12a at the corresponding portion is made different so that the adjacent ring-shaped reinforcing member 11 is indicated by A in the figure. This can be dealt with by connecting to the inverted C shape. Further, when there is a step in the existing pipe P, as shown in FIG. 4, the length of the pipe material 12a at the corresponding portion is made different in the same manner as described above, and the adjacent ring-shaped reinforcing member 11 is shown in FIG. This can be dealt with by providing a portion connected to the inverted C shape as shown by (2) and a portion connected to the C shape as shown by B as well.

  Next, as shown in a cross-sectional view in FIG. 5, a plurality of fitting members 2 are attached in parallel to each other along the cylinder length direction of the existing pipe P inside the hollow frame-shaped reinforcing body 1. Each fitting member 2 is a long member having a uniform cross section, and the length thereof is, for example, the length between a manhole to a manhole in an existing pipeline. The fitting member 2 is attached to the reinforcing body 1 by fitting the fitting member 2 into each of the fitting recesses 110 formed on the inner periphery of the ring-shaped reinforcing member 11. As shown in the cross-sectional view of FIG. 6, the cross-sectional shape of the fitting member 2 is substantially uniform in thickness, and its outer shape is an angular C-shape that is substantially the same as the concave portion 110 for fitting. The reinforcement 21 is attached to the reinforcing member 1 with the opening 21 facing the inside of the reinforcing body 1 so that the opening 21 coincides with the opening of the fitting recess 110. The material of the fitting member 2 can be a thermoplastic resin, a thermosetting resin, or the like, similarly to the inner surface member 3 described below.

  Thereafter, as shown in FIG. 7 and FIG. 8, respectively, the inner surface member 3 is attached to the inside of the reinforcing body 1 through the fitting members 2. The inner surface member 3 in this example is a flat plate-like long body along the tube length direction of the existing pipe P, and, for example, the length between the manhole to the manhole of the existing pipe line is similar to the fitting member 2 described above. Have. Further, as shown in an enlarged view in FIG. 9, the cross-sectional shape is bilaterally symmetric, and fitting convex portions 31a and 31b are integrally formed on both side edges of one side.

  The material of the inner surface member 3 is, for example, an olefin-based thermoplastic resin such as a polyethylene resin for sewer pipes, a thermosetting resin such as an unsaturated polyester resin, a fiber reinforced plastic such as GFRP, or stainless steel. It can be a metal.

  The distance between the fitting convex portions 31a and 31b of the inner surface member 3 is equal to the distance between the fitting members 2 attached in parallel to each other inside the reinforcing body 1, and one inner surface of the inner surface members 3 adjacent to each other. The fitting convex portion 31a of the member 3 and the fitting convex portion 31b of the other inner surface member 3 are inserted into the opening 21 of the fitting member 2 in a state where the fitting convex portion 31a abuts on the other inner surface member 3. In this inserted state, the tip protrusions of the fitting protrusions 31 a and 31 b are wider than the opening 21 of the fitting member 2, so that the inner surface member 3 is reinforced via the fitting member 2. 1 is held securely.

  The inner surface member 3 may be wound around a reel or the like, introduced into the reinforcement body 1 in the existing pipe P through a manhole, and fitted into the fitting member 2. Further, in order to obtain water-tightness between the inner surface members 3 adjacent to each other, as shown in an enlarged cross-sectional view of the main part in FIG. 10, the front end surfaces of the fitting convex portions 31 a and 31 b of each inner surface member 3 and the fitting member 2. It is desirable to interpose a sealing material 5 such as synthetic rubber or water-swollen rubber between them.

  Next, as shown in a cross-sectional view in FIG. 11, the curable filler 4 is injected between the existing pipe P and the inner surface member 3 and cured. As the curable filler 4, for example, cement-based materials such as cement milk, mortar and concrete, or thermosetting resins such as unsaturated polyester resins and epoxy resins can be used. Is done. At the time of this injection, the end of the existing pipe may be infused with a wife frame or the like, or the inner surface member 3 may be provided with an inlet and injected in a batch system.

  In the above-described embodiment, a particularly notable point is a hollow in which a plurality of high-rigidity ring-shaped reinforcing members 11 are connected and integrated in the cylinder length direction of the existing pipe P by a connecting member 12 inside the existing pipe P. A skeleton-shaped reinforcement body 1 is provided, and the inner surface member 3 is fitted and supported to the reinforcement body 1 via the fitting member 2 to be curable and filled between the inner surface member 3 and the existing pipe P. This is the point that the material 4 is filled. As a result, a rebar structure pipe is built in the existing pipe P, and the strength of the pipe after repair is extremely high. Further, since the curable filler 4 is cured in a state where the curable filler 4 enters the through-hole 112 formed in the ring-shaped reinforcing member 11, the curable filler 4 and the reinforcing body 1 have a large mutual bonding force due to the anchor effect. Thus, a stable strength can be obtained.

  Even if the inner diameter of the existing pipe P is slightly larger than the planned dimension, the outer diameter of the ring-shaped reinforcing member 11 can be changed using the through hole 112. Furthermore, the through-hole 112 is effective for reducing the resistance when the curable filler 4 is injected and reducing the weight of the reinforcing body 1, as well as the irregularities formed on the outer periphery of the ring-shaped reinforcing member 11.

  Further, in the above-described embodiment of the present invention, since the inner surface member 3 is a plate-like member that is continuous in the tube length direction of the existing pipe P, the inner surface of the pipe after repair is a seam in the tube length direction. There is no, and the flow ability can be increased.

  Here, in the above embodiment, when there is a possibility that the reinforcing body 1 may be lifted when the curable filler 4 is injected, as shown in the cross-sectional view of FIG. 6 may be attached. Further, in order to prevent deformation of the reinforcing body 1 due to the action of external pressure, such a filling member 6 may be provided on the side of the reinforcing body 1. The spacing member 6 provided on the side functions so that the repair body 1 is in contact with the existing pipe line and hardly deforms when an external pressure is applied. The interposing member 6 can be attached using the through hole 112 of the ring-shaped reinforcing member 11 or the like.

  In the above embodiment, an example in which the present invention is applied to an existing pipe having a circular cross section has been described. However, the present invention is equally applied to an existing pipe having an arbitrary cross section such as a horseshoe tube or a rectangular tube (box culvert). Can be applied.

FIG. 13 shows a cross-sectional view when the present invention is applied to a horseshoe tube. The example of FIG. 13 uses the embodiment shown in FIGS. 1 to 11 almost as it is, and the shape of the segment constituting the ring-shaped reinforcing member 11 of the reinforcing body 1 is a variant to be repaired. The pipe P ′ is appropriately changed in accordance with the shape of the pipe P ′, and these are connected to each other by the same connecting member 11d as in the previous example, so that the entire shape is substantially along the inner surface of the deformed pipe P ′ to be repaired. Thus, the present invention can be easily applied.

In addition, in any case of using any form of the inner surface member, there is no particular limitation with respect to the fitting position of the reinforcing body to the fitting concave portion or the forming position of the fitting convex portion for fitting to the fitting member. If the case where the flat plate-like inner surface member 3 is arranged along the cylinder length direction of the existing pipe P is described as an example, the fitting convex portions 31a and 31b are provided on both side edges as shown in FIG. As shown in the cross-sectional view of the main part in the fitted state in FIG. 14 , symmetrical projections 31 a and 31 b that are equivalent to the above are provided on both side edges, and these are combined in the middle part. Needless to say, the fitting convex portion 31c is provided, and the intermediate fitting convex portion 31c can be deformed by being fitted into the fitting member 2 or the fitting concave portion 110 of the reinforcing body 1 alone.

Further, in each of the above embodiments, before assembling the reinforcing body 1, it is preferable to arrange the cylindrical outer surface material 7 along the inner periphery of the existing pipe P as shown in a cross-sectional view in FIG. 15 . . The outer surface material 7 can prevent the curable filler 4 from escaping outside the existing pipe line, and can also prevent the performance of the curable filler 4 from contacting with the groundwater and deteriorating. For example, a fiber sheet or a waterproof sheet is used as the outer surface material 7 and is fixed to the inner surface of the existing pipe P by an appropriate fixing method using a nail or an adhesive. By using a water-permeable material such as a fiber sheet for the outer surface material 7 and using a cement-based material for the curable filler material 4, excess moisture and air contained in the curable filler material 4 are passed through the outer surface material 7. Can be discharged to the outside. Therefore, the cementitious material can be brought into a consolidated state, is not easily affected by groundwater even before complete curing, and can reliably exhibit high strength after curing.

It is explanatory drawing of the construction procedure of embodiment of this invention, and is a cross-sectional view which shows the state which assembled the reinforcement body 1 inside the existing pipe line. It is a longitudinal cross-sectional view which shows the state of FIG. It is explanatory drawing of the coping method when the existing pipe P has a curve. It is explanatory drawing of the coping method when there exists a level | step difference in the existing pipe P. FIG. It is explanatory drawing of the construction procedure of embodiment of this invention, and is a cross-sectional view which shows the state which attached the fitting member 2 inside the reinforcement body 1. FIG. It is a cross-sectional view of the fitting member 2 used in the embodiment of the present invention. It is explanatory drawing of the construction procedure of embodiment of this invention, and is a cross-sectional view which shows the state which attached the inner surface member 3 inside the reinforcement body 1. FIG. It is a longitudinal cross-sectional view which shows the state of FIG. It is a cross-sectional view of the inner surface member 3 used in the embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of a main part showing a state in which a sealing material 5 is interposed between an inner surface member 3 and a fitting member 2 in the embodiment of the present invention. It is explanatory drawing of the construction procedure of embodiment of this invention, and is a cross-sectional view which shows the state which inject | poured the curable filler 4 between the inner surface member 3 and the inner surface of the existing pipe P. It is explanatory drawing of the 2nd Embodiment of this invention, and is a cross-sectional view which shows the state which attached the padding material 6 in order to prevent the lifting to the reinforcement body 1. FIG. It is a transverse cross section at the time of applying the present invention to a horseshoe tube. It is a cross-sectional view for demonstrating the other example of the convex part for a fitting of the inner surface member used in this invention. It is a cross-sectional view which shows the example in the case of using an outer surface material in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reinforcement body 11 Ring-shaped reinforcement member 11a, 11b, 11c Arc-shaped segment 11d Coupling member 110 Recess for fitting 111 Concavity and convexity 112 Through-hole 12 Connection member 12a Pipe material 12b Bolt 12c Nut 2 Fitting member 21 Opening portion 3 Inner surface member 31a, 31b Protruding part for fitting 4 Curable filler 5 Sealing material 6 Filling member 7 External material P Existing pipe P 'Deformed pipe

Claims (19)

Assembling a hollow frame-shaped reinforcing body approximately along the inner surface of the existing pipe using a plurality of reinforcing members that can be carried into the existing pipe line and provided with concave portions for fitting . A fitting member is attached to each of the fitting recesses, and a plurality of inner surface members are fitted to the fitting member to assemble it into a cylindrical shape along the tube length direction of the existing pipeline, and then the inner surface member. A method of repairing an existing pipe line, wherein a curable filler is injected into a gap between the pipe and the existing pipe inner surface. The method for repairing an existing pipe line according to claim 1 , wherein a long member continuous in the cylinder length direction of the existing pipe line is used as the fitting member. The method for repairing an existing pipeline according to claim 1 or 2 , wherein a long body continuous in the cylinder length direction of the existing pipeline is used as the inner surface member. The reinforcing body is assembled by arranging a plurality of ring-shaped reinforcing members having a shape substantially along the inner surface of the existing pipe at predetermined intervals in the cylinder length direction of the existing pipe line, and integrated with each other in the cylinder length direction by the connecting member. The method for repairing an existing pipe line according to any one of claims 1 to 3, wherein the pipe is assembled. A partial reinforcing body is assembled by a ring-shaped reinforcing member and a connecting member divided in the circumferential direction in advance outside the existing pipeline, and then the partial reinforcing body is carried into the existing pipeline and assembled. The repair method of the existing pipe line of any one of Claims 1, 2, 3, or 4 characterized by these. 6. A stuffing member is provided on the outer periphery of the reinforcing body, and the stuffing member reduces or eliminates the gap between the existing inner peripheral surface of the pipe and the reinforcing body . The repair method of the existing pipe line of any one item . 7. The reinforcing body is assembled after disposing a cylindrical outer surface material along the inner surface of the existing pipe on the inner surface of the existing pipe , and any one of claims 1, 2, 3, 4, 5 and 6 Repair method for existing pipelines as described in. A repair material for use in the method according to claim 1, comprising a concave portion for a plurality of fitting inside, substantially along the existing pipe surface by assembling a plurality of circumferentially divided annular reinforcement member hollow a reinforcing member which forms the frame structure, the first fitting portion is formed to be fitted to the fitting recessed portion on the outer side, and a plurality of fitting members which second fitting portion is formed on the inside An existing pipe line repair material comprising a plurality of inner surface members having smooth inner surfaces on which outer surfaces or end portions are formed with fitting portions that fit into the second fitting portions. The repair material for repairing an existing pipe line according to claim 8 , wherein each of the fitting members is a long member that is continuous in a cylinder length direction of the existing pipe line. 10. The repair material for repairing an existing pipe line according to claim 8 , wherein each of the inner surface members is a long body continuous in the cylinder length direction of the existing pipe line. The reinforcing body includes a plurality of ring-shaped reinforcing members arranged at predetermined intervals in the cylinder length direction of the existing pipe line, and a plurality of connecting members that mutually connect and integrate the ring-shaped reinforcing members. The repair material for existing pipe line repair according to any one of claims 8, 9 and 10 . The unevenness | corrugation for forming the groove-shaped space which continues at least in the existing pipe cylinder length direction is formed in the outer periphery of the said reinforcement body, The any one of Claim 8, 9, 10 or 11 characterized by the above-mentioned. Repair material for repairing existing pipelines as described in the section . The hole for penetrating in the existing pipe cylinder length direction is formed in the said reinforcement body, The repair for existing pipe line repairs of any one of Claim 8, 9, 10, 11 or 12 characterized by the above-mentioned. Wood. To the reinforcing member, it can be attached to its periphery, and claims, characterized in that it comprises a Matsume member to eliminate or reduce the gap between the existing pipe inner surface by a mounting 8,9,10,11,12 Or the repair material for existing pipe line repair of any one of 13 . In the existing pipe line, a hollow frame-shaped reinforcing material is arranged substantially along the inner surface of the existing pipe, and fitting members are respectively attached to a plurality of fitting recesses provided inside the reinforcing body . A plurality of inner surface members that are continuous in the tube length direction are arranged in a cylindrical shape extending along the tube length direction, and are attached to the reinforcing member via the fitting member , and the inner surface member and the existing pipe line A pipe formed by filling a curable filler between the inner surface. The pipe line according to claim 15 , wherein the fitting member is a long member that is continuous in a cylinder length direction of an existing pipe line. The reinforcing body includes a plurality of ring-shaped reinforcing members substantially along the inner peripheral surface of the existing pipe, and a plurality of connecting members that connect and integrate the ring-shaped reinforcing members in the tube length direction of the existing pipe line. The pipe line according to claim 15 or 16 , characterized by. Together are holes penetrating the cylinder length direction of the existing pipe line is formed in the reinforcing member, either of claims 15, 16 or 17 the curable filler material to the hole is characterized in that it is filled Or the pipe according to claim 1 . The cylindrical outer surface material along the inner surface of the existing pipe is interposed between the reinforcing body and the inner surface of the existing pipe, and a curable filler is filled between the outer surface material and the inner surface member. 19. Pipe line according to any one of claims 15, 16, 17 or 18 .

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