JPH07285175A - Lining construction method of existing pipe - Google Patents

Abstract

PURPOSE:To facilitate the lining of the inner peripheral surface of an existing pipe from the inside by spirally winding a strip like material main body having fitting parts having a specific shape formed thereto and fitting strip like materials fitted from the side opposite to the inner peripheral surface in both fitting parts adjacent each other along a side edge part. CONSTITUTION:Fitting parts 13 are formed to both side parts of a strip like material main body 10 and a plurality of ribs 12 are longitudinally extended on one surface side thereof in parallel. Each of the fitting parts 13 has a leading end part 13a rising from a main body part 11 on the arranging side of the ribs 12 and bent outwardly from the side edge of the main body 10 at a right angle at a place having the same height as the ribs and again bent toward the main body part 11 at a right angle and a recessed part 13b is formed by the leading end part 13a. A fitting strip like member 20 has the groove 21 fitted in the strip like material main body 10 and ridges 22a, 22b. Two strip like material main bodies 10, 10 are parallely arranged so that the side edge parts thereof are brought to a close contact state and, when the fitting strip like member 20 is pushed in the fitting part 13 on the side of the main body part 11, both strip like material main bodies 10, 10 can be connected by the fitting strip like member 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of lining an existing pipe for rehabilitating an aged pipe, such as a sewer.

[0002]

2. Description of the Related Art For example, in a sewer using a fume pipe, sewage may stay in the pipe for a long time. In such a case, corrosive gas such as hydrogen sulfide gas is generated, and the concrete portion of the pipe wall May be damaged. Therefore, the inner peripheral surface of the pipe is lined with a lining member made of a synthetic resin such as vinyl chloride resin.

Conventionally, such a synthetic resin lining material is generally attached to the inner peripheral surface of the pipe as follows. First of all, a lining material such as vinyl chloride is pasted on the entire outer peripheral surface of the inner peripheral formwork in advance,
By removing only the inner formwork after the concrete has hardened between this formwork and the outer steel segment,
The lining material is adhered to the inner peripheral surface of the pipe.

As for the form of the lining material, as shown in FIG. 9, the strip has a convex portion at one end and a concave portion at the other end, which is spirally wound to form a convex portion. The one in which the recesses are overlapped from above and joined together, or as shown in FIG.
As disclosed in Japanese Patent No. 152794, there is one that connects the edges in the longitudinal direction of a rectangular repair plate divided into a plurality of pieces in the circumferential direction.

[0005]

By the way, the lining of the inner peripheral surface of the pipe when the new pipe is laid with the lining material as described above is also useful for rehabilitating a pipe which is aged and severely damaged. In the structure of the conventional lining material as shown in FIG. 9, when pasting from the inside of the existing pipe,
It is impossible or extremely difficult to join the side edges of the strips together. Further, since it is composed of one member, it is difficult to adjust the position whether it is not displaced, and if the spiral tube is displaced and fitted at the side edge in a reduced diameter state, the diameter of the spiral tube becomes tapered. is there.

Further, in the conventional lining method as shown in FIG. 10 described above, it is necessary to divide the lining material according to the diameter of the existing pipe before inserting it into the existing pipe for construction.
As a work method, the worker connects the longitudinal edges of the rectangular repair plate to form a cylinder, moves it to the rear, then creates a succeeding cylinder, and glues the peripheral edges of the cylinders with an adhesive. The present invention has been made in view of such a point, which is described as being bonded and has poor workability. The object of the present invention is to easily line the inner peripheral surface of the existing pipe from the inside. The purpose is to provide existing existing pipes.

[0007]

In order to achieve the above object, the lining construction method for an existing pipe of the present invention is a construction method for lining a strip body and a fitting strip on the inner peripheral surface of the existing pipe. , Fitting in the shape of a band as a whole, on both side edges in the width direction thereof, which rises to the inner peripheral surface side of the existing pipe, then bends outward toward the edge portion, and its tip returns to the side opposite to the inner peripheral surface A step of spirally winding the strip-shaped body having the parts formed therein, and fitting the strip-shaped body from the side opposite to the inner peripheral surface to the fitting parts in a state of being adjacent to each other along the side edge of the strip-shaped body. And a step of fitting the fitting band-shaped member that fits in.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial external perspective view of a belt-shaped body according to an embodiment of the present invention, and FIG. 2 is a partial external perspective view of a fitting belt-shaped body.

A flat plate-shaped main body 11 of the belt-shaped main body 10, a plurality of parallel ribs 12 extending in the longitudinal direction on one surface side of the main body 11, and both side portions of the main body 11 are formed. It is composed of a fitting portion 13.

The rib 12 has a T-shaped cross section, and its tip is parallel to the main body and has a uniform height.
The fitting portion 13 rises from the main body portion 11 to the side where the ribs 12 are provided, bends outward at the side edge at a right angle at the same height as the ribs, and again bends at a right angle toward the main body portion 11 side. 13a, which forms a recess 13b. Further, a projection 13c protruding inward is provided at the tip of the tip 13a.

As shown in FIG. 2, the fitting band 20 has a substantially C-shaped cross section as a whole, and has both side surfaces and a back surface which are flat, and the band body 10 is fitted on the front side. Groove 21 into which two tips 13a of the portion 13 are fitted at the same time
Is formed, and both side walls of the strip-shaped body 1
The protrusion 2 having the same shape as the concave portion 13b of the fitting portion 13 of 0
It is formed by 2a and 22b.

As shown in FIG. 3, the strip body 10 and the fitting strip 20 as described above are composed of two strip bodies 1.
In the state where 0 and 10 are arranged side by side with their side edges in close contact with each other, the fitting strip 20 is pushed from the main body 11 side toward the fitting part 13 so that two tips are provided as shown in FIG. The parts 13a, 13a fit into the groove 21 and the ridge 22
By fitting a and 22b into the recesses 13b and 13b, respectively, it is possible to join the two strip body bodies 10 and 10 by the principle of the so-called male / female locking mechanism.

In such a fitted state, the dimensions of both the main body portion 11 of the strip-shaped body 10 and the back surface of the fitting strip 20 are flush with each other to form a smooth surface. It is set.

In the above-described embodiment of the present invention, the rib 12 side of the strip body 10 is joined by the fitting strip 20 which is pushed from the inside of the existing pipe with an adhesive. At this time, it is desirable to bond with an adhesive together with the mechanical coupling by the fitting band 20.

As a method of attaching the present invention to an existing pipe, as shown in a sectional view in FIG.
Is spirally attached along the inner peripheral surface of the existing pipe 30, and at the same time, the fitting band 20 is fitted, and as shown in the sectional view of FIG. The strip-shaped body main body 10 cut to a length substantially the same as or slightly shorter than the above is affixed adjacently in the pipe axial direction along the circumferential direction of the pipe 30, and the fitting strip-shaped body 20 is fitted. is there.

The strip body 10 is adhered to the inner peripheral surface of the existing pipe by casting concrete between the pasting surface and the existing pipe and hardening the concrete. The present invention is not limited to the above-described embodiment, and the shape of the fitting portion of the belt-shaped body and the shape of the fitting belt-shaped body are, for example,
Modifications such as those shown in FIGS. 8 and 9 are possible.

FIG. 7 shows a zigzag-shaped cross section on one end side of the fitting portion of the strip-shaped body, and FIG. 8 shows a zigzag-shaped portion at the tip of the same fitting portion. The fitting band-shaped body has a shape adapted to it. . In the example shown in FIG. 7, it is desirable to use an adhesive agent in addition to the mechanical connection by the fitting band like the previous embodiment, but in the example shown in FIG. It is necessary to bond them by adhesion with an adhesive.

The ribs of the strip body may have a T-shaped cross section as described above, or may have a rectangular, trapezoidal, square or inverted trapezoidal cross section.

As the material of the strip body and the fitting strip, a flexible synthetic resin such as vinyl chloride or polyolefin can be used.

[0020]

[Effect] As described above, according to the method of adhering to the inner peripheral surface of the existing pipe of the present invention and lining it, since it can be fitted from the side opposite to the adhering surface (that is, from the inside), The strip body can be attached to the inner peripheral surface from the inside of the existing pipe to easily join the side edge portions.

Further, since a long strip is wound in a spiral shape for repairing, it is easy to perform lining suitable for the diameter of the existing pipe, and it is easy to perform lining even for a long-distance existing pipe. Further, since the belt-shaped body is composed of two members, the belt-shaped body and the band-shaped fitting body, the belt-shaped body main body and the belt-shaped body main body are positioned by adjusting the positions of the belt-shaped body main body and the belt-shaped body main body so that the belt-shaped body body is fitted. Since they can be combined, the diameter of the spiral has the effect of not shrinking and tapering.

[Brief description of drawings]

FIG. 1 is a partial external perspective view of a strip body 10 according to an embodiment of the present invention.

FIG. 2 is a partial external perspective view of the fitting strip 20 of the embodiment of the present invention.

FIG. 3 is an explanatory view of a method for fitting the band-shaped body 10 and the band-shaped body 20 for fitting.

FIG. 4 is an end view showing the fitted state.

FIG. 5 is an explanatory view of a method for sticking to an existing pipe according to an embodiment of the present invention.

FIG. 6 is an explanatory view of a method for sticking to an existing pipe according to an embodiment of the present invention.

FIG. 7 is an end view of a main portion of another embodiment of the present invention.

FIG. 8 is an end view of a main portion of another embodiment of the present invention.

FIG. 9A is an explanatory view of a conventional strip, and FIG. 9B is a cross-sectional view of the conventional strip.

FIG. 10 is an explanatory view of another conventional strip.

[Explanation of symbols]

 10 main body 11 strip body 12 rib 13 fitting part 20 strip for fitting 30 existing pipe

Claims (1)

[Claims] 1. A method of lining a strip-shaped body and a fitting strip on an inner peripheral surface of an existing pipe, which is in the form of a strip as a whole, and is formed on both side edges in the width direction of the existing pipe. A step of spirally winding a strip-shaped body having a fitting portion in which the edge portion is bent outward and then the tip of the edge portion is returned to the side opposite to the inner peripheral surface. A step of fitting a fitting band-like body that is fitted from the side opposite to the inner peripheral surface to the both fitting portions that are adjacent to each other along the side edge portion of the main body, Pipe lining method.