JP4541946B2 - Repair structure of existing pipeline - Google Patents

Description

  The present invention relates to a lining repair structure for existing pipelines such as sewer pipes, and more particularly to a repair structure for existing pipelines suitable for covering and repairing the inner surface of a large-diameter existing pipeline. .

Many methods have been proposed for covering the inner surface of an existing pipeline with a lining material as a repair structure for an existing pipeline such as an aged sewer pipeline.
As such a lining repair structure, for example, in Patent Document 1 below, a hollow frame-shaped reinforcing material that is substantially along the inner surface of the existing pipeline is arranged in the existing pipeline, and the inside of the reinforcing material is arranged. By attaching a plurality of inner surface materials that are continuous in the axial direction of the existing pipe line in close contact with the circumferential direction of the existing pipe line, the whole is assembled into a cylindrical shape along the axial direction of the existing pipe line, and assembled into the cylindrical shape. A repair method is disclosed in which a curable filler is filled between the formed inner surface material and an existing pipe line.
Further, in Patent Document 2 below, a hollow frame-shaped reinforcing material is arranged in an existing pipeline, and an inner surface material along the axial direction of the existing pipeline is continuously provided in the circumferential direction inside the reinforcing material. Pipelined lining structures have been proposed that can solve problems in manufacturing and transportation even if the length of attachment and repairing of the pipeline is long and the required length of the inner surface material is long.

However, in the above-described conventional existing pipeline repair structure, if the former tries to use the inner surface material and the fitting member that are continuous in the axial direction as the repair length of the existing pipeline becomes longer, Difficult cases have occurred on equipment. That is, the inner surface material and the fitting member are usually wound around a drum or a reel at the time of manufacture, but if the length exceeds a certain limit, the outer diameter of the drum or the reel after winding increases, There are problems such as installation space at the site, and when these drums and reels are transported, there is a problem that a transport vehicle becomes large and entry into a normal lane becomes difficult.
Although the latter solves these problems, the reinforcing material is composed of a number of members when the hollow frame-shaped reinforcing material is arranged in the existing pipeline, so that the reinforcing material is assembled in the existing pipeline. There is a problem that a great deal of labor is required, and furthermore, the number of inner surface materials is large, and a great deal of labor is required to lock them to the fitting members.

JP 2001-311387 A JP 2002-310378 A

  In view of the problems of the above-described conventional existing pipe repair structure, the present invention eliminates the labor for assembling without using a reinforcing material and facilitates the assembly and disposition of the inner surface material. The purpose is to provide a repair structure for existing pipelines.

In order to achieve the above object, the existing pipe repair structure according to the first aspect of the present invention is an existing pipe in which a strip-like inner surface material divided in the axial direction and circumferential direction of the existing pipe is lined on the inner surface of the existing pipe. In the road repair structure, the inner surface material is made of a thermoplastic resin , a reinforcing rib is provided in a circumferential direction on the outer peripheral side of the inner surface material, and a plurality of short bolt shafts are penetrated through the reinforcing rib and fixed by nuts. and manner, and a bolt insertion hole formed in the axial direction, the inner surface material adjacent to each other in the axial direction, as well as joining a nut bolt provided with a female screw on the head, forming a groove located on both sides of the inner surface material The inner surface materials adjacent to each other in the circumferential direction are joined to each other by connecting members having portions on both sides, and a curable filler is filled between the joined inner surface material and the existing pipe line.
The “grooves” and “living portions” here are not limited to pigeon tails, but also include T-shapes.

In order to achieve the same object, the repair structure for an existing pipe line of the second invention is lined with an inner surface of a strip-like inner surface material divided in the axial direction and the circumferential direction of the existing pipe line. In the repair structure of an existing pipeline , the inner surface material is made of a thermoplastic resin , a reinforcing rib is provided in a circumferential direction on the outer peripheral side of the inner surface material, and a plurality of short bolt shafts are penetrated through the reinforcing rib to form a nut. so as to fix, and a bolt insertion hole formed in the axial direction, the inner surface material adjacent to each other in the axial direction, as well as joining a nut bolt provided with a female screw on the head, located on one side of the inner surface material A groove is formed on the other side surface, a portion is formed on the other side surface, and inner surfaces adjacent to each other in the circumferential direction are joined to each other by the groove and the portion, and a curable filler is filled between the joined inner surface material and the existing pipe line. It is characterized by that.
The “grooves” and “living portions” here are not limited to pigeon tails, but also include T-shapes.

  In this case, the inner surface member connected in the circumferential direction can be annularly bound on the outer peripheral side by a plurality of bolts with nuts provided with internal threads on the head.

  Further, a water-expandable resin water-stopping material or rubber packing can be disposed on the end face and side face of the inner face material.

  Further, reinforcing ribs can be provided on the outer peripheral side of the inner surface material in the axial direction and / or the circumferential direction.

  Moreover, a taper can be provided in the nut receiving seat of the bolt insertion hole.

  Also, the moisture curable sealing material can be continuously filled in the connecting portion of the inner surface material vertically and horizontally.

According to the repair structure of the existing pipe line of the first aspect of the invention, it is possible to very easily assemble and arrange the inner surface material made of thermoplastic resin , and between the joined inner face material and the existing pipe line. Since the curable filler is filled in, the joining of the inner surface material can be made more secure, the existing pipe line and the inner surface material can be integrated, and the pipe line can be strengthened to withstand long-term use.
In addition, the bolt shaft fixed to the reinforcing rib exhibits an anchor effect on the curable filler, and the inner surface material made of thermoplastic resin and the curable filler can be more strongly integrated.

Moreover, according to the repair structure of the existing pipe line of the second aspect of the invention, the inner surface material made of thermoplastic resin can be assembled and disposed very easily, and the joined inner face material and the existing pipe line can be assembled. Since the curable filler is filled in between, the joining of the inner surface material can be made more secure, and the existing pipe line and the inner surface material can be integrated, and the pipe line can be reinforced to withstand long-term use.
In addition, the bolt shaft fixed to the reinforcing rib exhibits an anchor effect on the curable filler, and the inner surface material made of thermoplastic resin and the curable filler can be more strongly integrated.

  In this case, the inner surface material can be firmly connected in the circumferential direction by binding the inner surface material connected in the circumferential direction in an annular shape on the outer peripheral side with a plurality of bolts with nuts provided with internal threads on the head.

  Further, by providing a water-expandable resin water-stopping material or rubber packing on the end face and side face of the inner face material, it is possible to prevent water from entering and leaving the pipe line.

  Further, by providing reinforcing ribs in the axial direction and / or circumferential direction on the outer peripheral side of the inner surface material, the rigidity in the axial direction or circumferential direction of the inner surface material can be increased.

  Further, by providing a taper on the nut receiving seat of the bolt insertion hole, it is possible to prevent the bolt with nut from rotating.

  In addition, water can be prevented from entering and exiting the inside and outside of the pipe by continuously filling the connecting portion of the inner surface material with a moisture curable sealing material vertically and horizontally.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an existing pipeline repair structure according to the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of a repair structure for an existing pipeline according to the present invention.
As shown in FIG. 1, the repair structure of the existing pipe line is formed on, for example, the inner surface of the existing pipe line 1 (repair pipe) having an inner diameter of 1200 mm that requires repair in the axial direction and the circumferential direction of the existing pipe line 1. The divided strip-shaped inner surface material 2 is lined.
The repair structure of the existing pipe line is formed with bolt insertion holes 3 on the outer peripheral side of the inner surface material 2 as shown in FIGS. A connecting member that is joined with a bolt 4 with a nut provided with a female screw 42 and has grooves 5 on both side surfaces of the inner surface material 2, and the inner surface materials 2 adjacent to each other in the circumferential direction are provided with portions 61 on both sides. 6, a curable filler 7 is filled between the joined inner surface material 2 and the existing pipe line 1.

  In this case, as shown in FIG. 4 (b), the joining of the inner surface materials 2 adjacent in the circumferential direction forms a groove 5 on one side surface of the inner surface material 2, and a portion 61 on the other side surface. The dovetail groove 5 and the dovetail part 61 can be directly fitted to each other, whereby the bonding force between the inner surface materials 2 can be further strengthened.

The existing pipe line 1 is not particularly limited in cross-sectional shape or inner diameter length, but a repaired pipe having a diameter of 1000 to 2000 mm can be suitably selected.
In this case, the size of the inner surface material 2 can be drawn into the pipe to be repaired through the manhole first, then the amount of water flowing in the pipe, the strength of the pipe rod repair structure, and the labor of assembly are considered in advance. It is most important to design an optimal shape and size, and to form a curved surface or a flat surface in which these are securely engaged with each other and the inner surface is smooth.

As shown in FIG. 2, the inner surface material 2 has a circular arc shape along the inner surface of the existing pipe line 1 and includes reinforcing ribs 21 in the circumferential direction.
A plurality of short bolt shafts 8 are provided through the reinforcing rib 21, and the bolt shaft 8 is fixed to the reinforcing rib 21 by a pair of nuts 81.
The bolt shaft 8 exhibits an anchor effect with respect to the curable filler 7, and the inner surface material 2 and the curable filler 7 are more strongly integrated.

Further, in this embodiment, the inner surface material 2 has a width obtained by dividing the inner surface of the existing pipe line 1 into five in the circumferential direction, and has a rectangular shape made of a synthetic resin having an appropriate axial length such as 50 cm. Consists of things.
Here, as described above, the inner surface material 2 is usually made of a synthetic resin, but a thermoplastic resin can be preferably used from the viewpoint of moldability, and in particular, it is economical, flexible, adhesive and the like. Excellent vinyl resin-based vinyl chloride resin and vinyl acetate resin can be optimally used. Other resins such as olefin resin-based polyethylene resins and polypropylene resins, mixtures of these synthetic resins, copolymers of these synthetic resins with ethylene-vinyl acetate, elastomers, modified polyolefins, etc. These mixtures can also be suitably used, and most known rubbers can be used in combination, both natural and synthetic.
In addition, in order to improve the sealing performance, small protrusions and grooves that are fitted to each other are formed on the end surface and the side surface of the inner surface material 2, respectively. It is also possible to interpose a resin water-stopping material or rubber packing.

As shown in FIGS. 2 to 3, a plurality of bolt insertion holes 3 are formed continuously in a sleeve shape in the axial direction of the inner surface material, and these bolt insertion holes 3 also serve as axial reinforcing ribs. ing.
Further, the bolt insertion hole 3 has nut chambers 31 for accommodating nuts at both ends of the inner surface material 2, and the nut chamber 31 matches the taper attached to the head portion 41 of the bolt 4 with nut. The nut receiving seat 32 is provided with a taper, thereby preventing the nut-attached bolt 4 from rotating.

As shown in FIG. 3, the nut-attached bolt 4 includes a shaft portion 44 having a male screw 43 formed at the tip thereof, and a head portion 41 provided at the base end of the shaft portion 44. The female screw 42 into which the other nut-equipped bolt 4 is screwed is formed in the axial direction.
The nut-equipped bolt 4 can be made of metal or synthetic resin, but is preferably made of steel from the viewpoint of strength and economy. Further, the shaft portion 44 may be constituted by a steel rod as shown in FIG. 3 (d), or may be constituted by a flexible wire excluding the tip portion as shown in FIG. 3 (f). it can.

Further, as shown in FIG. 4, dovetail-shaped grooves 5 are formed on both side surfaces of the inner surface material 2, and the inner surface materials 2 adjacent to each other in the circumferential direction are connected to each other with portions 61. The members 6 are connected.
The connecting member 6 has a wedge-shaped loose taper and has a surface substantially parallel to the taper so that the connecting member 6 is inserted into and fixed to the groove 5, and the length of the connecting member 6 is longer than the length of the groove 5. It can be formed short.
In this case, by providing slipping property to at least one of the connecting member 6 and the dovetail groove 5, the connecting member 6 can be made to slide within the dovetail groove 5 and the joining of the inner surface materials 2 can be facilitated.
In addition, by filling the connecting portion of the inner surface material 2 with a moisture-curable sealing material continuously in the vertical and horizontal directions, it is possible to prevent water from entering and leaving the pipe.
Can do.
The connecting member 6 can be made of the same synthetic resin or rubber as the inner surface material 2 described above, and the sealing material is made of a generally known material such as a urethane-based sealing material. A thing can be used suitably.

  Moreover, as shown in FIGS. 3-4, it is generally known in the axial direction and the circumferential direction connection part of the inner surface material 2 that it is made of rubber or synthetic resin, and further has water expandability as required. It is possible to dispose the packing 9 made of the same material, thereby preventing water from entering and leaving the pipe.

In addition, as shown in FIG. 1, a curable filler 7 is injected between the joined inner surface material 2 and the existing pipe line 1, and the inner surface material 2 is more joined by the injected curable filler 7. In addition to the reliability, the existing pipe line 1 and the inner surface material 2 can be integrated to further strengthen the pipe line 1.
In addition, as the curable filler 7, for example, a material that is generally widely known, such as mortar and placon, can be used as appropriate.

On the other hand, as shown in FIG. 5, the inner surface member 2 connected in the circumferential direction can be annularly bound on the outer peripheral side by a plurality of bolts 4 with nuts provided with a female screw 42 on the head 41.
In this case, the nut-equipped bolt 4 is disposed so as to penetrate a plurality of reinforcing ribs 22 formed on the inner surface in the axial direction.
The bolt 4 with a nut has a shaft portion 44 having a male screw 43 formed at the tip thereof, and a head portion 41 provided at the base end of the shaft portion 44. Is formed in the axial direction, and the shaft portion 44 excluding the tip portion is made of a flexible wire.

  Thus, the existing pipe line repair structure of the present embodiment is an existing pipe line repair structure in which a strip-shaped inner surface material 2 divided in the axial direction and the circumferential direction of the existing pipe line is lined on the inner surface of the existing pipe line. A bolt insertion hole 3 is formed on the outer peripheral side of the inner surface material 2, and the inner surface materials 2 adjacent to each other in the axial direction are joined with a bolt 4 with a nut provided with a female screw 42 on the head 41. Since the groove 5 is formed on both side surfaces and the inner surface materials 2 adjacent to each other in the circumferential direction are joined to each other by the connecting member 6 provided with the portions 61 on both sides, the assembly and arrangement work of the inner surface material 2 is very Further, since the curable filler 7 is filled between the joined inner surface material 2 and the existing pipe line, the inner surface material 2 is more reliably joined and the existing pipe line and the inner surface material 2 are bonded. And strengthen the pipeline to withstand long-term use It can be.

  Further, as shown in FIG. 4B, the joining of the inner surface materials 2 adjacent to each other in the circumferential direction is formed on one side surface of the inner surface material 2 with a groove 5 and on the other side surface with a portion 61. By directly fitting the dovetail groove 5 and the dovetail part 61, the joining force between the inner surface materials 2 can be further strengthened.

In this case, the inner surface material 2 connected in the circumferential direction is tightly connected in the circumferential direction by tightly binding the inner surface material 2 in the circumferential direction with a plurality of bolts 4 with nuts 42 provided on the head 41 on the outer peripheral side. be able to.
Further, by providing a water-expandable resin water-stopping material or rubber packing on the end face and side face of the inner face material, it is possible to prevent water from entering and leaving the pipe line.
Further, by providing the reinforcing ribs 21 and 22 in the axial direction and / or the circumferential direction on the outer peripheral side of the inner surface material 2, the rigidity in the axial direction or the circumferential direction of the inner surface material 2 can be increased.
Further, by providing the nut receiving seat 32 of the bolt insertion hole 3 with a taper, it is possible to prevent the nut-equipped bolt 4 from rotating.
In addition, by filling the connecting portion of the inner surface material 2 with a moisture-curable sealing material continuously in the vertical and horizontal directions, it is possible to prevent water from entering and leaving the pipe.

  As mentioned above, although the repair structure of the existing pipe line of this invention was demonstrated based on the Example, this invention is not limited to the structure described in the said Example, In the range which does not deviate from the meaning, that The configuration can be changed.

  The existing pipeline repair structure of the present invention is excellent in workability, economy, durability, water resistance, strength, etc., so it is suitable for pipes such as sewers, and also suitable for vertical holes such as manholes. Can be applied.

One Example of the repair structure of the existing pipeline of this invention is shown, (a) is sectional drawing of an axial orthogonal direction, (b) is a top view of the joined inner surface material. An example of the inner surface material used in the embodiment is shown, (a) is a plan view, (b) is a sectional front view, (c) is a front view, (d) is a sectional right side view, and (e) is (d) (F) is a right side view. (A) is a sectional view showing a bolt insertion hole and a bolt with a nut, (b) is a front view of the bolt insertion, (c) is a front view showing an example in which a reinforcing rib is provided in the vicinity of the bolt insertion hole, (d) Is a front view of a bolt with a nut, (e) is a sectional view of a head nut, and (f) is a front view of a bolt with a nut having a shaft portion formed of a wire. (A) is sectional drawing which shows the joining state of the inner surface material by a connecting member and a dovetail groove, (b) is sectional drawing which shows the joining state of the inner surface material which integrally formed the dough part, (c) is three surfaces of a connecting member FIG. It is sectional drawing of the principal part which shows the binding of the inner surface material with a volt | bolt with a nut.

DESCRIPTION OF SYMBOLS 1 Existing pipe line 2 Inner surface material 21 Reinforcement rib 22 Reinforcement rib 3 Bolt insertion hole 31 Nut chamber 32 Nut receiving seat 4 Bolt with nut 41 Head 42 Female screw 43 Male screw 44 Shaft portion 5 Groove 6 Connecting member 61 Portion 7 Hardness Filler 8 Bolt shaft 81 Nut 9 Packing

Claims (7)

In the repair structure of an existing pipeline in which a strip-shaped inner surface material divided in the axial direction and circumferential direction of the existing pipeline is lined on the inner surface of the existing pipeline , the inner surface material is made of a thermoplastic resin, Reinforcing ribs are provided in the circumferential direction on the outer peripheral side , a plurality of short bolt shafts are penetrated through the reinforcing ribs and fixed with nuts, and bolt insertion holes are formed in the axial direction, adjacent to the axial direction. Joining the inner surface materials with bolts with nuts with internal threads on the head, forming grooves on both side surfaces of the inner surface material, and connecting inner surface materials adjacent in the circumferential direction with portions on both sides A repairing structure for an existing pipe, which is joined by a member and filled with a curable filler between the joined inner surface material and the existing pipe. In the repair structure of an existing pipeline in which a strip-shaped inner surface material divided in the axial direction and circumferential direction of the existing pipeline is lined on the inner surface of the existing pipeline , the inner surface material is made of a thermoplastic resin, Reinforcing ribs are provided in the circumferential direction on the outer peripheral side , a plurality of short bolt shafts are penetrated through the reinforcing ribs and fixed with nuts, and bolt insertion holes are formed in the axial direction, adjacent to the axial direction. While joining the inner surface materials with bolts with nuts provided with internal threads on the head, forming grooves on one side surface of the inner surface material, forming a portion on the other side surface, and adjacent inner surface materials in the circumferential direction A repair structure for an existing pipe line, which is joined by the dovetail groove and the part, and a curable filler is filled between the joined inner surface material and the existing pipe line.   The repair structure for an existing pipe line according to claim 1 or 2, wherein the inner surface material connected in the circumferential direction is annularly bound on the outer peripheral side by a plurality of bolts with nuts provided with female threads at the head. 4. The repair structure for an existing pipe line according to claim 1, 2, or 3, wherein a water-expandable resin water-stopping material or rubber packing is disposed on the end face and side face of the inner face material. The repair structure for an existing pipe line according to claim 1, 2, 3, or 4, wherein reinforcing ribs are provided in an axial direction and / or a circumferential direction on an outer peripheral side of the inner surface material. The repair structure for an existing pipe line according to claim 1, 2, 3, 4, or 5, wherein a taper is provided on a nut receiving seat of the bolt insertion hole.   The repair structure for an existing pipe line according to claim 1, 2, 3, 4, 5 or 6, wherein the connecting portion of the inner surface material is continuously and vertically filled with a moisture-curable sealing material.

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