JP2023094034A - Cover member used for covering structure of rehabilitation pipe, construction method of rehabilitation pipe using cover member, and rehabilitation pipe - Google Patents

Abstract

To provide, in repairing of an existing pipe, a cover member used for a covering structure of a rehabilitation pipe for smoothly carrying out a work for covering a gap between the existing pipe to be repaired and an inner surface material in a short time even in a case where the existing pipe is a large sized pipe and a case of construction work in a state of very high flow speed, and to provide a construction method of the rehabilitation pipe using the cover member, and the rehabilitation pipe.SOLUTION: A cover member 4 used for a covering structure of a rehabilitation pipe 1 comprises: a first panel portion 41 in contact with an inner peripheral surface of an existing pipe P; and a second panel portion 42 installed to stand from the first panel portion 41 toward a pipe center side of the rehabilitation pipe 1. The first panel portion 41 is fixed to the existing pipe P, and the second panel portion 42 covers a gap between the existing pipe P and an inner surface material 2 at an end portion of the inner surface material 2.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a cover member used in a rehabilitating pipe covering structure for repairing an existing pipe, a rehabilitating pipe constructing method using the cover member, and a rehabilitating pipe.

Conventionally, in order to repair existing pipes such as aged sewage pipes, many proposals have been made for repair structures for existing pipes (rehabilitation pipes) in which the inner surface of the existing pipe is entirely covered with an inner surface material (for example, Patent Document 1 ~7.).

By the way, in the repair of the existing pipe, when filling the gap between the inner surface material and the existing pipe with the filler, the gap between the existing pipe and the inner surface material should be should be coated (see, for example, Patent Documents 5 to 7).
Then, in order to cover the gap (pipe mouth) between the existing pipe and the inner surface material, a sealing agent such as resin putty or mortar is used to manually seal the pipe mouth (see, for example, Patent Document 6). Alternatively, a method of closing the pipe mouth using general-purpose members made of plates, sandbags, blocks, foamed resin materials, etc., or expansion materials such as mortar bags (see, for example, Patent Document 7) was adopted.

Japanese Patent Application Laid-Open No. 2002-310378 JP 2006-316539 A Japanese Patent No. 5746443 JP 2017-198305 A JP 2017-178669 A JP 2014-77261 A JP 2011-106537 A

By the way, when the existing pipe to be repaired is a large pipe, the gap between the inner surface material and the existing pipe becomes wide. However, in the case of manually closing the pipe mouth, the mortar used to fill the gap tends to flow to the inner part of the pipe and to the left and right. In particular, there was a problem that work on the upper part of the pipe mouth was accompanied by difficulties.
In addition, especially in the case of construction work with a large amount of water or a very high flow rate, it is not possible to adopt a method of closing the pipe mouth by hand using a sealant such as resin putty or mortar. Even when using expansive materials, it was difficult to reliably fix each material under running water.

The present invention has been made in view of such circumstances. A cover member used in a rehabilitating pipe covering structure for enabling the work of covering the gap between the existing pipe and the inner surface material to be performed smoothly and in a short time, and a rehabilitating pipe constructing method and rehabilitating pipe using the cover member intended to provide

In order to achieve the above object, the cover member used in the rehabilitating pipe covering structure of the present invention comprises:
An inner surface material arranged inside an existing pipe, a filler filling a gap between the inner surface material and the existing pipe, and a coating covering the gap between the existing pipe and the inner surface material at an end of the inner surface material. A cover member used in the covering structure of a rehabilitating pipe, comprising:
The cover member is
a first panel portion in contact with the inner peripheral surface of the existing pipe;
a second panel portion erected from the first panel portion toward the core of the rehabilitating pipe,
The first panel section is fixed to the existing pipe,
The second panel section covers the gap.

In this case, the cover member may be provided with a third panel portion extending from the second panel portion to the innermost side of the rehabilitating pipe and in contact with the inner surface member.

Further, the cover member may be composed of a plurality of parts divided in the circumferential direction of the rehabilitating pipe.

Also, the parts can be connected to each other by a connecting member.

Also, the second panel portion may be provided with a hole communicating with the gap.

Further, the second panel portion may be provided with a projecting portion toward the pipe inner side of the rehabilitating pipe in the gap.

Further, a method for constructing a rehabilitated pipe of the present invention is a method for constructing a rehabilitated pipe using the cover member,
placing the inner surface material on the inner peripheral surface of the existing pipe;
a step of using the cover member to cover the gap between the existing pipe and the inner surface member at the end of the inner surface member;
filling the gap between the existing pipe and the inner surface member with a filler.

Further, a rehabilitated pipe of the present invention is a rehabilitated pipe using the cover member,
the inner surface material arranged inside the existing pipe;
a filling material for filling the gap between the inner surface material and the existing pipe;
and the cover member covering the gap between the existing pipe and the inner surface member at the end of the inner surface member.

According to the cover member used in the covering structure of the rehabilitating pipe of the present invention, the construction method of the rehabilitating pipe using the cover member, and the rehabilitating pipe, when repairing an existing pipe, the existing pipe to be repaired is a large pipe or the volume of water is large. Even in the case of construction work in a state where the flow rate is very high or in a state where the flow velocity is very high, the work of covering the gap between the existing pipe and the inner surface material can be performed smoothly and in a short time.

1 shows an embodiment of a rehabilitating pipe to which a cover member used in the rehabilitating pipe covering structure of the present invention is applied, (a) is a front view of the pipe end of the rehabilitating pipe, (b) is a cross-sectional view of the same, and (c) is a It is the same longitudinal cross-sectional view. The parts and connection members of the same cover member are shown, (a1) is a front view of the part 4A (displayed by rotating 180 degrees with respect to FIG. 1 (a)), (a2) is a plan view of the same, (a3) ) is an end view of AA line of (a1), (a4) is a side view of the same, (b1) is a front view of the part 4B, (b2) is a plan view of the same, (b3) is BB of (b1) (b4) is a side view of the same, (c) is a vertical cross-sectional view of the position where the socket member of part 4A (part 4B) is provided, (d1) is a front view of the connecting member, (d2) is the same It is a side view. The parts and connecting members of the same cover member are shown, (a1) is a front view of part 4C (displayed by rotating it 90 degrees to the right with respect to FIG. 1 (a)), (a2) is C of (a1) -C line end view, (a3) is the same side view, (a4) is the same plan view, (b1) is the front view of the part 4D, (b2) is the DD line end view of (b1), (b3) is the same side view, (b4) is the same plan view, (c1) is a front view of the connecting member, and (c2) is the same side view. Parts and connecting members of the same cover member are shown, (a1) is a front view of part 4E, (a2) is an end view of EE line of (a1), (a3) is a side view of the same, and (a4) is the same. A plan view, (b1) is a front view of the part 4F (displayed by rotating it 90 degrees to the left with respect to FIG. 1 (a)), (b2) is an end view on the FF line of (b1), (b3) is the same side view, (b4) is the same plan view, (c1) is a front view of the connecting member, and (c2) is the same side view. Fig. 2 shows an example of a rehabilitation pipe of an existing pipe, (a) is an explanatory diagram showing a rehabilitation pipe structure of an existing pipe having a circular cross section, and (b) is an explanatory diagram showing a rehabilitation pipe structure of an existing pipe having a rectangular cross section.

Hereinafter, embodiments of a cover member used in a rehabilitating pipe covering structure of the present invention, a method for constructing a rehabilitating pipe using the cover member, and a rehabilitating pipe will be described with reference to the drawings.

1 to 4 show an embodiment of a rehabilitating pipe to which the cover member used in the rehabilitating pipe covering structure of the present invention is applied.
A rehabilitation pipe 1 for repairing an existing pipe P, as shown in FIG. and a covering structure covering the gap between the existing pipe P and the inner surface material 2 at the end of the inner surface material 2 .

Here, in the present invention, the existing pipe P to be repaired is not only the existing pipe P having a rectangular cross section in this embodiment, but also an existing pipe having an arbitrary cross-sectional shape such as an existing pipe having a circular cross section.

In addition, for the rehabilitation pipe 1, known rehabilitation pipes (see, for example, Patent Documents 1 to 7) that are used to rehabilitate existing pipes such as aged sewage pipes can be widely used. In the embodiment, as shown in FIG. 5, a rehabilitated pipe (FFT Construction Method Association "string construction method" (registered Trademark)) (see Patent Documents 3 and 4).

The cover member 4 used for the covering structure of the rehabilitating pipe 1 in the present embodiment includes a first panel portion 41 in contact with the inner peripheral surface of the existing pipe P, and a center side of the rehabilitating pipe 1 from the first panel portion 41. and a third panel portion 43 extending from the second panel portion 42 to the inner side of the rehabilitating pipe 1 and in contact with the inner surface member 2, which is provided as necessary. The first panel part 41 is fixed to the existing pipe P, and the second panel part 42 covers the gap between the existing pipe P and the inner surface material 2 at the end of the inner surface material 2 Furthermore, the third panel portion 43 is in contact with the inner peripheral surface of the inner surface member 2 (the surface on the core side of the existing pipe).
In this embodiment, the cover member 4 is used to cover the entire circumference of the gap between the existing pipe P and the inner surface member 2. The side part of the pipe mouth, etc.) may be an aspect using only a sealing agent such as resin putty or mortar (see, for example, Patent Document 6), or a general-purpose member or mortar bag made of a plate material, sandbag, block, foamed resin material, etc. (see, for example, Patent Document 7).

Here, a small hole 44 is formed in the first panel portion 41 of the cover member 4 so as to be fixed to the existing pipe P via an anchor member 44a such as a drive-in anchor provided in the existing pipe P. there is
Thereby, the cover member 4 can be fixed to the existing pipe P reliably.

At this time, if the surface of the existing pipe P is uneven and the uncured filler 3 leaks from the gap between the existing pipe P and the first panel portion 41 of the cover member 4, the concave portion should be filled with quick-drying mortar in advance. The first panel portion 41 of the cover member 4 may be fixed after filling the hole with , or cutting the convex portion to make it flat.
Alternatively, after fixing the first panel portion 41 of the cover member 4 to the existing pipe P, from the end of the first panel (opposite side of the second panel) to the surface of the existing pipe P, sealing is performed with quick-drying mortar. (sealing) is applied, a packing 48 such as a chloroprene rubber sheet is interposed between the surface of the existing pipe P and the first panel portion 41 of the cover member 4, or both are used together. can also
Incidentally, even in the case of construction work with a large amount of water or a very high flow rate, quick-drying mortar or the like can be suitably used for such sealing purposes.

On the other hand, in this embodiment, a third panel portion 43 is provided so that the uncured filler 3 is less likely to leak from the gap between the second panel portion 42 of the cover member 4 and the rehabilitating pipe 1. However, when the third panel portion 43 is not provided in order to reduce weight and manufacturing costs, the uncured filler 3 will flow out from the gap between the second panel portion 42 of the cover member 4 and the rehabilitating pipe 1. If there is leakage, use quick-drying mortar for sealing (filling) as appropriate, or seal the gap in advance with packing (not shown) such as a chloroprene rubber sheet, or use both together. You can

The third panel portion 43 in this embodiment is provided so as to come into contact with the inner peripheral surface of the inner surface member 2 as described above.
This makes it difficult for the uncured filler 3 to leak out from the gap between the cover member 4 and the rehabilitating pipe 1 . Even so, if the uncured filler 3 still leaks from the gap between the third panel portion 43 and the inner surface material 2, seal the gap with quick-drying mortar or seal the gap. can be closed in advance with a packing 49 such as a sheet made of chloroprene rubber, or both can be used together.

In the second panel portion 42 of this embodiment, a hole 45 communicating with the gap between the existing pipe P and the inner surface material 2 is formed. A socket member 45a such as a bulb socket for supplying the material 3 is attached.
The number and positions of the holes 45 for mounting the socket members 45a can be determined in consideration of the flow and filling properties of the filler 3. , at a position near the inner peripheral surface of the existing pipe P, and at a position far from the inner peripheral surface of the existing pipe P at the lower position.
Thereby, the gap between the inner surface member 2 and the existing pipe P can be efficiently filled with the filler 3 .
Note that the hole 45 may not be formed in the second panel portion 42 . In this case, a hole saw or the like is used to provide a hole (a hole for filling the filler 3) in the inner surface material 2 that communicates with the gap between the existing pipe P and the inner surface material 2, thereby supplying the filler 3. .

Further, on the second panel portion 42 in this embodiment, a projecting portion 46 made of a threaded bolt, a stud bolt, or the like is provided toward the pipe inner side of the rehabilitating pipe 1 in the gap between the existing pipe P and the inner surface material 2. I am trying to set it up.
This projecting portion 46 is for applying a fixing force to the second panel portion 42 of the cover member 4 by the filling material 3 which is filled in the gap between the inner surface material 2 and the existing pipe P and solidified. The integrity of the tube 1 and cover member 4 can be further improved.

The cover member 4 in this embodiment is composed of a plurality of parts 4A divided in the pipe circumferential direction of the rehabilitating pipe 1 and having a shape adapted to the shape of the gap between the existing pipe P and the inner surface material 2 at the end of the inner surface material 2. It consists of ~4F.
In the case of the existing pipe P having a rectangular cross section in this embodiment, the parts 4A to 4F are composed of the parts 4A to 4B arranged on the plane portion of the existing pipe P and the parts 4C to 4F arranged on the corners. However, the configuration of the parts depends on the cross-sectional shape of the existing pipe P, the shape of the gap between the existing pipe P and the inner surface material 2 at the end of the inner surface material 2, the means for carrying in the cover member, etc. The panel part has a circular arc shape to match the existing circular pipe, one part covers the entire lower part of the pipe mouth without dividing, and one part is made shorter than this embodiment for weight reduction. be able to.
Thereby, the cover member 4 suitable for the cross-sectional shape of the existing pipe P, the shape of the gap between the existing pipe P and the inner surface member 2 at the end of the inner surface member 2, and the carrying-in means can be manufactured and easily installed.

In this embodiment, when the cover member 4 is formed by combining the parts 4A to 4F, adjacent parts are connected by a connecting member 47. As shown in FIG.
The connecting member 47 has a cross-sectional shape along the parts 4A to 4F of the cover member 4, and is integrated by welding its approximate half 47a to the surface of one of the adjacent parts, and the other approximate half 47b. He is trying to adhere|attach on the surface of the other part of the adjoining parts through packing, such as a chloroprene-rubber sheet|seat.
This prevents the uncured filler 3 from leaking out from the gaps between the parts 4A to 4F that constitute the cover member 4. As shown in FIG. Even so, if the uncured filler 3 still leaks from the gaps between the parts 4A to 4F, it can be suitably sealed with quick-drying mortar.

When the cover member 4 is formed by butting the parts 4A to 4F without providing the connecting member 47, if the uncured filler 3 leaks from the gaps between the parts 4A to 4F, the Seal the part with quick-drying mortar.
In this case, the number of locations that require sealing (sealing) increases compared to the case where the connecting member 47 is provided, but the number of parts constituting the cover member 4 can be reduced, and the manufacturing cost can be reduced.

The parts 4A to 4F and the connecting member 47 constituting the cover member 4 are, in this embodiment, stainless steel plates several mm thick (the parts 4A to 4F are 3 mm thick, and the connecting member 47 is 2 mm thick). SUS304.) is formed into a predetermined shape by welding or bending.
As a result, the rigidity for reliably supporting the pressure of the filler 3 filled in the gap between the inner surface member 2 and the existing pipe P can be ensured. In addition, compared to the conventional mortar-only embodiment, it is possible to build a high-quality rehabilitating pipe coating structure that is superior in corrosion resistance and wear resistance.
The parts 4A to 4F and the connecting member 47 that constitute the cover member 4 have rigidity to reliably support the pressure of the filler 3 filled in the gap between the inner surface member 2 and the existing pipe P, corrosion resistance, and wear resistance. The material is not limited to a stainless steel plate as long as it can ensure the properties. For example, it is also possible to use aluminum plate material, iron plate material with appropriate plating, fiber reinforced plastic (including carbon fiber reinforced plastic) plate material, polyvinyl chloride resin plate material, polyolefin resin plate material such as polyethylene resin, etc. can. Moreover, these materials can be used separately for each part in the same cover member 4 .

In constructing the rehabilitation pipe 1 using this cover member 4,
(1) A step of arranging the inner surface material 2 on the inner peripheral surface of the existing pipe P (2) A step of covering the gap between the existing pipe P and the inner surface material 2 using the cover member 4 at the end of the inner surface material 2 ( 3) The rehabilitating pipe 1 can be constructed by sequentially performing the steps of filling the gap between the existing pipe P and the inner surface material 2 with the filler 3 .
When the cover member 4 is used to cover the gap between the existing pipe P and the inner surface material 2, a sealant such as resin putty, mortar, or the like is applied by hand to partially cover the gap to close the pipe mouth. A method (for example, see Patent Document 6.), A method for closing the pipe mouth using a general-purpose member made of plate material, sandbag, block, foamed resin material, etc., or an expanding material such as a mortar bag (for example, Patent Document 6) Reference 7) can also be used together.

As a result, the inner surface material 2 arranged inside the existing pipe P, the filler 3 filling the gap between the inner surface material 2 and the existing pipe P, and the existing pipe P and the inner surface material 2 at the end of the inner surface material 2 A rehabilitation pipe can be constructed with a cover member 4 covering the gap.

In addition, in repairing the existing pipe P, even when the existing pipe P to be repaired is a large pipe, or when the work is carried out in a state where the amount of water is large or the flow velocity is very high, the existing pipe P and the inner surface material 2 The work of covering the gap can be performed smoothly and in a short time, and the construction work of the rehabilitating pipe 1 including the filling work of the filler 3 can be performed smoothly and in a short time.

As described above, the cover member used in the covering structure of the rehabilitating pipe of the present invention, the method for constructing the rehabilitating pipe using the cover member, and the rehabilitating pipe have been described based on the examples. , and the configuration can be changed as appropriate without departing from the scope of the invention.

The cover member used for the covering structure of the rehabilitating pipe of the present invention, the construction method of the rehabilitating pipe using the cover member, and the rehabilitating pipe are suitable for repairing existing pipes when the existing pipe to be repaired is a large pipe or when the flow velocity is very high. Even in the case of construction work, the work of covering the gap between the existing pipe and the inner surface material can be performed smoothly and in a short time, so it can be suitably used for repairing existing pipes such as aged sewage pipes. can.

P Existing pipe 1 Rehabilitation pipe 2 Inner surface material 3 Filling material 4 Cover member (covering structure)
4A to 4F parts 41 first panel part 42 second panel part 43 third panel part 44 small hole 44a anchor member 45 hole 45a socket member 46 protrusion 47 connecting member 48 packing 49 packing

Claims (8)

An inner surface material arranged inside an existing pipe, a filler filling a gap between the inner surface material and the existing pipe, and a coating covering the gap between the existing pipe and the inner surface material at an end of the inner surface material. A cover member used in the covering structure of a rehabilitating pipe, comprising:
The cover member is
a first panel portion in contact with the inner peripheral surface of the existing pipe;
a second panel portion erected from the first panel portion toward the core of the rehabilitating pipe,
The first panel section is fixed to the existing pipe,
A cover member used in a structure for covering a rehabilitating pipe, wherein the second panel portion covers the gap. 2. The covering structure for a rehabilitating pipe according to claim 1, wherein the cover member includes a third panel portion extending from the second panel portion to the innermost side of the rehabilitating pipe and in contact with the inner surface member. Cover member used for. The cover used for the covering structure of the rehabilitating pipe according to any one of claims 1 and 2, wherein the cover member is composed of a plurality of parts divided in the pipe circumferential direction of the rehabilitating pipe. Element. 4. The cover member used for the covering structure of the rehabilitating pipe according to claim 3, wherein the parts are connected to each other by a connecting member. 5. The cover member used in the covering structure for rehabilitating pipes according to claim 1, wherein the second panel portion is provided with a hole communicating with the gap. The rehabilitating pipe covering according to any one of claims 1 to 5, characterized in that the second panel portion is provided with a projection toward the pipe inner side of the rehabilitating pipe in the gap. A cover member used for construction. A method for constructing a rehabilitation pipe using the cover member according to any one of claims 1 to 6,
placing the inner surface material on the inner peripheral surface of the existing pipe;
a step of using the cover member to cover the gap between the existing pipe and the inner surface member at the end of the inner surface member;
and filling the gap between the existing pipe and the inner surface material with a filler. A rehabilitating pipe using the cover member according to any one of claims 1 to 6,
the inner surface material arranged inside the existing pipe;
a filling material for filling the gap between the inner surface material and the existing pipe;
The rehabilitating pipe, comprising: the cover member covering the gap between the existing pipe and the inner surface member at the end of the inner surface member.

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