JP2003328430A - Repairing member for existing conduit and repairing structure for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a repairing member for an existing conduit, which eliminates formation of an unfilled portion of a curable filler, and to provide a repairing structure for the same. <P>SOLUTION: In implementation of repairing, a divided reinforcing member 2 being a component part of a ring reinforcing member has incisions 2d formed in an inner edge thereof, which leads to formation of a cavity S between the divided reinforcing member 2 and an inner member 22 in a lengthwise direction of the existing conduit 10. By virtue of the cavity S, even if the divided reinforcing member 2 set in the vicinity of a bottom of the conduit secures a passage for stagnant water and air in the pipe, extruded by injection of the curing filler 23, which smooths flow of the curing filler 23 in the pipe in the lengthwise direction, to thereby prevent formation of the unfilled portion of the curing filler 23. Further, by connecting the incisions 2d to a through hole 2c, formation of a contour of the divided reinforcing member 2 and formation of the through hole 2c can be simultaneously carried out, and therefore processing cost is reduced. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair member and repair structure for an existing pipeline such as a sewer pipeline, and more particularly, to rehabilitate an existing pipeline having a large diameter that has deteriorated.
The present invention relates to a repair member and a repair structure for repairing an inner surface of a pipeline by using a reinforcing member carried into the pipeline.

[0002]

2. Description of the Related Art As a method of repairing existing pipelines such as deteriorating sewer pipelines, the inner surface of the existing pipeline is lined with an inner lining material.
A method of covering the entire surface with is known. As such a repairing method, particularly regarding the repairing of a large-diameter pipe in which a person can enter the pipeline and work, the present applicants have already disclosed in JP-A-2001-31.
No. 1387 proposes a repairing method that can sufficiently reinforce an existing pipe and does not require supporting work at the time of repairing, and a repairing structure of a pipeline obtained by the method. Regarding the lining material (inner surface member) used for repairing the existing pipeline, in Japanese Patent Application No. 2001-108940, even if the repair length of the pipeline is long and the required length of the inner surface member is long, problems in manufacturing and transportation We are proposing a lining structure for pipelines that can solve the above problems.

5 to 10 are shown in Japanese Unexamined Patent Publication No. 2001-311.
It is the schematic diagram which showed the repair method of the conventional existing pipeline which concerns on the proposal of No. 387, and its structure. This repairing method for the existing pipeline is carried out by assembling a hollow frame-shaped reinforcing body made of a high-rigidity material (for example, steel) inside the existing pipeline and lining a resin or metal inside the reinforcing body (inner member). )
After the attachment, the space formed by these lining materials and the inner surface of the conduit is filled with a curable filler (backfilling material).

FIG. 5 is a cross-sectional view taken along the radial direction of the existing pipe (hereinafter, a cross-sectional view in this direction is referred to as a cross-sectional view), and FIG. 6 is taken along the tube length direction of the existing pipe. FIG. 3 is a cross-sectional view cut below (hereinafter, a cross-sectional view in this direction is referred to as a vertical cross-sectional view). As shown in FIG. 5, in this repair method, first, the ring-shaped reinforcing member 1 having a shape substantially along the inner surface 10 a of the conduit is assembled inside the existing pipe 10. In this ring-shaped reinforcing member 1, a plurality of divided reinforcing members 2 (in this example, three divided reinforcing members) carried in from a manhole or the like are connected to each other by a connecting member 3, and the pipe inner surface 10 as a whole.
It is assembled in a ring shape substantially along a. A plurality of fitting recesses 2a for fitting a fitting member 21 to be described later are formed on the radially inner side of the split reinforcing member 2 at equal intervals in the circumferential direction, and the outer edges thereof are circumferentially arranged. Concavities and convexities 2b that are uniformly continuous are formed. Further, through holes 2c and 3c penetrating in the cylinder length direction are formed in the divided reinforcing member 2 and the connecting member 3 at regular intervals in the circumferential direction, and a plurality of ring-shaped reinforcing members 1 are formed. At the stage, as shown in FIG. 6, the pipe material 4a and the bolt 4b
The ring-shaped reinforcing member 1 is connected / integrated at regular intervals in the cylinder length direction of the existing pipe by the connecting member 4 including the nut 4c to form a hollow frame-like reinforcing body as a whole.

Next, as shown in the transverse sectional view of FIG. 7, long fitting members 21 are provided in parallel with each other in the fitting recesses 2a of the arcuate auxiliary member 2 along the tube length direction of the existing pipe 10. Attach to. After that, as shown in the cross-sectional view of FIG. 8 and the cross-sectional view of FIG. 8 taken along the line XX of FIG. 8, the inner surface member is provided inside the ring-shaped reinforcing member 1 via each fitting member 21. Two
2 will be attached. The inner surface member 22 in this example is an elongated body having a substantially U-shaped cross section along the tube length direction of the existing pipe 10, and like the fitting member 21 described above, for example, between the manhole and the manhole of the existing pipe 10. Has a length of.

Next, as shown in the transverse sectional view of FIG. 10, a curable filler 23 is injected into the space between the inner surface member 22 and the inner surface 10a of the conduit. As the material of the curable filler 23, for example, cement-based material such as cement milk, mortar, concrete, or thermosetting resin such as unsaturated polyester resin or epoxy resin is used.
The injected curable filler 23 was formed by the unevenness 2b of the split reinforcing member 2 while filling the partition of the voids partitioned in the cylinder length direction for each ring-shaped reinforcing member 1 from the bottom side of the existing pipe. From the gap or the gap between the split reinforcing member 2 and the inner surface 10a of the conduit, or the like, it will sequentially flow into the next void section.

This method for repairing existing pipelines makes it easy to obtain a seamless watertight structure and makes the strength of the hollow frame-like reinforcing member sufficient. As a result, fluidity as a curable filler (backfilling material) is obtained. It has a feature that it is possible to select a good and inexpensive material, such as mortar having a high water content.

[0008]

However, in the structure for repairing the existing pipeline as described above, the space between the inner surface member 22 and the pipeline inner surface 10a is provided near the bottom of the existing tube 10 when the curable filler is injected. In some cases, the accumulated water and air in the existing pipe may be trapped, and an unfilled portion of the curable filler 23 may be formed. As shown in the enlarged view of the bottom portion of the existing pipe 10 in FIG. 11, the unfilled portion R is generated in the vicinity of the portion where the radially inner edge of the split reinforcing member 2 and the inner surface member 22 are in contact (hatched portion in the figure). There is a possibility that if this unfilled part is formed, the repair of the existing pipeline may be structurally incomplete. In particular, in a horseshoe-shaped tube or a rectangular tube (box culvert) having a straight bottom surface, the unfilled portion R was significantly formed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a repair member and repair structure for an existing pipeline that does not form an unfilled portion of the curable filler. There is.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 uses a plurality of split reinforcing members in an existing pipeline to reinforce a ring shape along the inner surface of the pipeline. By assembling the members, arranging a plurality of ring-shaped reinforcing members in the longitudinal direction of the existing pipeline and integrating them with the connecting member, a hollow frame-like reinforcing body that is substantially along the inner surface of the existing pipeline is constructed. At the same time, a plurality of inner surface members are attached to the inside of the reinforcing body and assembled into a tubular shape along the cylinder length direction of the inner surface of the existing pipeline, and then cured in the space between the inner surface member and the inner surface of the existing pipeline. In a repair member used for repairing an existing pipeline for injecting a conductive filler, the inner edge of the split reinforcing member,
It is characterized in that a notch is formed so as to communicate with the space on both sides in the existing pipe tube length direction so as to contact the inner surface member.

According to the present invention, a notch is formed in the inner edge of a ring-shaped reinforcing member installed in a gap between an inner surface of an existing pipeline and an inner surface member covering the existing pipeline so as to pass the curable filler in the longitudinal direction of the pipeline. The purpose of this is to achieve the intended purpose by providing an escape route for accumulated water and air in the existing pipe.

That is, according to the invention of claim 1,
By forming cuts at the inner edge of the split reinforcing member used for constructing the ring-shaped reinforcing member to connect the spaces on both sides in the existing pipe tube longitudinal direction, the pipe tubular length is provided between the split reinforcing member and the inner surface member. A continuous gap is formed in the direction.
This gap secures passages for accumulated water and air that have been extruded by the injection of the curable filler even in the case of the split reinforcing members installed near the bottom of the existing pipeline, and these can be secured in the longitudinal direction of the pipeline. You can escape to. Therefore, the repair member for the existing pipeline of the present invention can smooth the flow of the curable filler in the pipeline length direction and prevent the non-filled portion of the curable filler from occurring.

Here, as a structure of the split reinforcing member, the notch communicates with a through hole through which the connecting member penetrates when the ring-shaped reinforcing member is integrated by the connecting member. 2) can be suitably adopted.

According to the second aspect of the present invention, the notch of the split reinforcing member can be formed at the same time as the through hole, and the shape processing of the split reinforcing member can be simplified. In particular,
When laser processing is used for this shape processing, the processing for forming the contour of the divided reinforcing member and the processing for forming the through hole, which have been conventionally performed in separate steps, can be simultaneously performed in a so-called one-stroke writing manner. This makes it possible to reduce the processing cost of the split reinforcing member. Further, it is desirable that the width of the ring-opening portion of the through hole opened by this notch is formed to be narrower than the width of the connecting member so that the connecting member inserted into the through hole does not fall out. With such a structure, it is possible to reduce the processing cost of the split reinforcing member without increasing the labor for assembling the ring-shaped reinforcing member, and thus it is possible to achieve the cost reduction of the entire existing pipe repair structure. Become.

On the other hand, according to the invention as defined in claim 3, a plurality of ring-shaped reinforcing members, which are formed by assembling a plurality of divided reinforcing members along the inner surface of the existing pipeline, are arranged in the longitudinal direction of the existing pipeline. Each ring-shaped reinforcing member is integrated with each other by a connecting member to construct a hollow frame-shaped reinforcing member, and is provided in the space between the inner surface members attached to the inside of the reinforcing member and the inner surface of the existing pipeline. In a structure for repairing an existing pipeline that is filled with a curable filler, the split reinforcing member according to claim 1 or 2 is used as the split reinforcing member, and notches formed in each split reinforcing member. Is filled with a curable filler.

That is, according to the invention of claim 3,
By using the split reinforcing member according to claim 1 or 2 for assembling the ring-shaped reinforcing member, the accumulated water or air extruded by the injection of the curable filler is piped even in the vicinity of the bottom of the existing pipeline. It is possible to allow the curable filler to escape in the lengthwise direction of the channel, and to fill the voids with no gap. In addition, during the cut of the split reinforcing member,
Since the curable filler is cured in a state where it enters, the curable filler and the ring-shaped reinforcing member have a large mutual bonding force due to the anchor effect, and more stable strength of the repair structure can be obtained.

Further, in the existing pipe repair structure, the inner surface member is attached to the reinforcing body through a plurality of fitting members mounted inside the ring-shaped reinforcing member ( Claim 4) is preferred.

According to the invention of claim 4, the size of the fitting portion between the reinforcing member and the inner surface member is smaller than that in the case where the inner surface member is directly fitted to the rigid ring-shaped reinforcing member. There is a margin and workability is improved. Further, the degree of freedom in selecting the material of the inner surface member according to the function required for the conduit is improved. Further, there is also an advantage that a seamless watertight structure can be easily obtained.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which a ring-shaped reinforcing member for repairing an existing pipeline in this embodiment is assembled in the existing pipeline, and FIG.
[Fig. 4] is an enlarged view of the P portion. Further, FIG. 3 is an enlarged view of an essential part showing a repair structure near the bottom of the existing pipeline in the present embodiment. In addition, the same code | symbol is attached | subjected to the structural member which has the same function as a prior art example.

The repairing method for the existing pipeline is basically the same as in the conventional example, in which a hollow frame-shaped reinforcing body made of a highly rigid material (for example, steel) is assembled in the existing pipeline, and the inside of the reinforcing body is assembled. After a lining material (inner surface member) made of resin, metal or the like is attached to, the space formed by these lining material and the inner surface of the conduit is filled with a curable filler (backfilling material). As shown in the cross-sectional view of FIG. 1, also in this repair method, first, the ring-shaped reinforcing member 1 having a shape substantially along the inner surface 10 a of the conduit is assembled inside the existing pipe 10. In this ring-shaped reinforcing member 1, a plurality of divided reinforcing members 2 carried in from a manhole or the like are connected to each other by a connecting member 3,
As a whole, it is assembled in a ring shape substantially along the inner surface 10a of the conduit.

A plurality of fitting recesses 2a for fitting a fitting member 21 which will be described later are formed on the radially inner side of the split reinforcing member 2 at equal intervals in the circumferential direction, and the outer edges thereof are formed. Concavities and convexities 2b that are uniformly continuous in the circumferential direction are formed. Further, through holes 2c and 3c penetrating in the cylinder length direction are formed in the split reinforcing member 2 and the connecting member 3 at regular intervals in the circumferential direction, and these through holes 2c and 3c are made to substantially coincide with each other. Ring-shaped reinforcing member 1
Is assembled.

Thereafter, in the ring-shaped reinforcing member 1 of the present embodiment, at the stage where a plurality of ring-shaped reinforcing members 1 are formed by the same method as the conventional example shown in FIG. Connecting member 4 consisting of nut 4c
Thus, these ring-shaped reinforcing members 1 are connected / integrated at regular intervals in the cylinder length direction of the existing pipe to construct a hollow frame-shaped reinforcing body as a whole. Further, in each of the fitting concave portions 2a of the arcuate auxiliary member 2, the long fitting members 21 are mutually arranged along the tube length direction of the existing pipe 10 by the same method as the conventional example shown in FIGS. 7 to 9. The long inner surface members 22 are attached in parallel, and the long inner surface member 22 is attached to the inside of the ring-shaped reinforcing member 1 via these fitting members 21.

The ring-shaped reinforcing member 1 in the present embodiment
2 is characterized in that, as shown in FIG. 2, notches 2d, 2d, 2d, 2d, which communicate with each through hole 2c are formed on the radially inner edge of the split reinforcing member 2.
... is formed. These notches 2
d is formed such that the width of the ring-opening portion 2f of each through hole 2c is smaller than the width of the connecting member 4 in order to prevent the connecting member 4 inserted into each through hole 2c from falling off. . With this structure, the split reinforcing member 2 is fitted to the fitting member 21.
Even when the inner surface member 22 and the inner surface member 22 are attached to each other, as shown in FIG.
Is formed.

Here, as in the case of FIG. 10 which is a conventional example, when the curable filler 23 is injected into the gap between the inner surface member 22 and the conduit inner surface 10a, the curable filler 23 is the same as described above. Due to the gap S formed by the gap S and the concave and convex portions 2b of the outer edge of the split reinforcing member 2, or the gap between the split reinforcing member 2 and the inner surface 10a of the pipe line, a gap is divided in the cylinder length direction for each ring-shaped reinforcing member 1. While filling the compartment from the bottom side of the existing pipe, it will flow into the next void compartment in sequence.

At the time of injecting the curable filler 23,
Particularly noteworthy is that even in the case of the split reinforcing member 2 installed near the bottom of the existing pipeline 10 as shown in FIG. 3, the pipe of the curable filler 23 is formed by the gap S continuous in the cylinder length direction. This is the point that the flow in the lengthwise direction of the road cylinder is maintained smoothly. Such an existing pipeline repair structure has a long inner surface member 22.
However, since it is attached to the ring-shaped reinforcing member via the elongated fitting member 21 as well, it is characterized by a seamless watertight structure. Therefore, the accumulated water and air remaining in the pipe
The inner surface member 22 and the existing inner surface 10a of the pipe are hermetically sealed. However, in the repair structure for the existing pipeline in the present embodiment, the retained water and air in the pipe pushed out by the injection of the curable filler 23 due to the gap S continuous in the cylinder length direction, Since it can be easily moved in the direction, it is possible to prevent the unfilled portion of the curable filler 23 from occurring.

Further, since the notch 2d cures in a state where the curable filler 23 enters, it has the effect of increasing the mutual bonding force between the curable filler 23 and the ring-shaped reinforcing member 1 by the anchor effect. You can also

In the above embodiment, an example in which the present invention is applied to repair the existing cylindrical pipe 10 has been described, but the split reinforcing member 2 of the present invention has a linear bottom surface and is located near the bottom. Needless to say, if it is used for repairing an existing pipe such as a horseshoe-shaped pipe or a rectangular pipe (box culvert) where there is a high possibility that an unfilled portion of the curable filler will occur, it is possible to achieve even higher effects.

Further, the method of processing the shape of the divided reinforcing member 2 used in the above-mentioned embodiments is not particularly limited, but when laser processing is used for this processing, it is conventionally performed in another step. This is preferable because the processing for forming the contour of the divided reinforcing member 2 and the processing for forming the through hole 2c can be performed at the same time. The shape of the cut 2d formed in the split reinforcing member 2 is not limited to this example, and tapered cuts 2e, 2e, ... As shown in FIG. May be.

Furthermore, since the connecting member 3 used for connecting the split reinforcing member 2 may be installed near the bottom of the existing pipeline 10, the same cut as the split reinforcing member 2 is formed. It is desirable to set it.

[0030]

As described in detail above, by using the split reinforcing member of the present invention for repairing the existing pipeline, the accumulated water extruded by the injection of the curable filler even near the bottom of the existing pipeline. The passage of air and air is secured, and it is possible to prevent the generation of unfilled parts of the curable filler.

Further, the notch of the divided reinforcing member enhances the mutual bonding force between the reinforcing body and the curable filler, and a repair structure having more stable strength can be obtained.

By adopting a structure in which the notch communicates with the through hole as the structure of the divided reinforcing member, the processing for forming the contour of the reinforcing member, which has conventionally been performed in another step, and the through hole. It becomes possible to simultaneously perform the processing for forming the, and the effect of reducing the processing cost of the reinforcing member can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a method for repairing an existing pipe according to an embodiment of the present invention, and is a cross-sectional view showing a state where a ring-shaped reinforcing member 1 is assembled inside an existing pipe 10.

FIG. 2 is an enlarged view of a P portion in FIG. 1 showing a cut shape of the split reinforcing member 2 according to the embodiment of the present invention.

FIG. 3 is an enlarged view of essential parts showing a repair structure near the bottom of the existing pipe in the embodiment of the present invention.

FIG. 4 is an enlarged view of a main part showing another cut shape of the split reinforcing member 2 according to the embodiment of the present invention.

FIG. 5 is an explanatory view showing a conventional method for repairing an existing pipe line, and is a transverse cross-sectional view showing a state where the ring-shaped reinforcing member 1 is assembled inside the existing pipe 10.

FIG. 6 is an explanatory view showing a conventional method for repairing an existing pipeline, and is a vertical cross-sectional view showing a state in which the ring-shaped reinforcing member 1 is integrated by a connecting member 4 in the cylinder length direction.

FIG. 7 is an explanatory view showing a conventional method for repairing an existing pipeline, and is a cross-sectional view showing a state in which a fitting member 21 is attached to the ring-shaped reinforcing member 1.

FIG. 8 is an explanatory view showing a conventional method for repairing an existing pipeline, and is a cross-sectional view showing a state in which an inner surface member 22 is attached to a fitting member 21.

9 is a cross-sectional view taken along the line XX of FIG.

FIG. 10 is a cross-sectional view showing a conventional repair structure for an existing pipeline.

FIG. 11 is an existing pipe 10 showing a conventional structure for repairing an existing pipe.
It is an enlarged view of the bottom vicinity.

[Explanation of symbols]

1 Ring-shaped reinforcing member 2 split reinforcement members 2a Fitting recess 2b unevenness 2c through hole 2d, 2e cut 2f Ring-opening site 3 coupling members 3c through hole 4 connecting members 4a Pipe material 4b bolt 4c nut 10 Existing pipe 10a Pipe inner surface 21 Fitting member 22 Inner member 23 Curable filler R unfilled part S gap

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Suzuki             2-18-17 Arakawa, Higashi-Osaka City, Osaka Prefecture F-term (reference) 2D055 AA04 BB01 CA04 JA00 KB03                       KB11 LA16                 2D063 EA07 EA08

Claims (4)

[Claims] 1. A ring-shaped reinforcing member is assembled along an inner surface of a pipeline by using a plurality of divided reinforcing members in an existing pipeline.
By arranging a plurality of the ring-shaped reinforcing members in the existing pipe tube length direction and mutually integrating them with the connecting member, a hollow frame-shaped reinforcing body that is substantially along the inner surface of the existing pipe is constructed, and After mounting a plurality of inner surface members inside the reinforcing body and assembling into a tubular shape along the tube length direction of the inner surface of the existing pipeline, a curable filler is placed in the space between the inner surface member and the inner surface of the existing pipeline. In a repair member used for repairing an existing pipeline to be injected, an inner edge of the split reinforcing member is formed with a notch that is in contact with the inner surface member and that communicates spaces on both sides in the existing pipeline tube length direction. A repair member for an existing pipeline, which is characterized in that 2. The existing structure according to claim 1, wherein the notch communicates with a through hole that allows the connecting member to penetrate when the ring-shaped reinforcing member is integrated with the connecting member. Repairing material for pipelines. 3. A plurality of ring-shaped reinforcing members formed by assembling a plurality of divided reinforcing members along the inner surface of the existing conduit are arranged in the longitudinal direction of the existing conduit, and each of the ring-shaped reinforcing members is connected by a connecting member. A hollow frame-shaped reinforcement body is constructed by being integrated with each other, and a curable filler is filled in the space between the plurality of inner surface members attached to the inside of the reinforcement body and the inner surface of the existing pipeline. In the repair structure for an existing pipeline, the split reinforcing member according to claim 1 is used as the split reinforcing member, and a notch formed in each split reinforcing member is filled with a curable filler. The existing pipe repair structure characterized by the presence of 4. The existing structure according to claim 3, wherein the inner surface member is attached to the reinforcing body via a plurality of fitting members mounted inside the ring-shaped reinforcing member. Pipe line repair structure.