JP2693124B2 - Existing pipe lining method - Google Patents

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 old pipe such as a sewer.

[0002]

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

Conventionally, such a lining material made of a synthetic resin is generally attached to the inner peripheral surface of a pipe as follows. First, 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 hardens between this formwork and the outer steel segment,
The lining material is adhered to the inner peripheral surface of the pipe.

As a form of the lining material, as shown in FIG. 9, a belt has a convex portion at one end and a concave portion at the other end, and is spirally wound to form a convex portion. A concave portion is overlapped from the top and joined together, or as shown in FIG.
As in JP-A-152794, there is one in which a rectangular repair plate divided into a plurality of pieces in the circumferential direction is connected to the longitudinal edges.

[0005]

By the way, the lining of the inner peripheral surface of the pipe at the time of laying a new pipe with the lining material as described above is also useful for rehabilitating an aging and severely damaged pipe. 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 band. In addition, since it is made of one member, it is difficult to adjust the position of the spiral tube, and if the spiral tube is fitted at a side edge while being reduced in diameter, 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 in accordance with the diameter of the existing pipe before inserting the pipe into the existing pipe and constructing it.
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 is made in view of such a point, and it is an object of the present invention to easily line the inner peripheral surface of the existing pipe from the inner side of the existing pipe. 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, rising to the inner peripheral surface side of the existing pipe, then bending outward of the edge portion, and the tip of which is returned to the side opposite to the inner peripheral surface A step of spirally adhering a strip-shaped body having a portion formed in the longitudinal direction along the inner peripheral surface thereof in the existing pipe, and the strip-shaped body is provided side by side along the side edge portion in the existing pipe. In a state where a fitting strip having a projection formed in the longitudinal direction is formed on the fitting portion adjacent to each other in the state of being fitted, and bonding is performed together with the joining by the fitting. And the steps of:

[0008]

FIG. 1 is a perspective view showing a part of the main body of a band according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a part of a band for fitting.

The main body 11 has a flat plate-like shape, a plurality of parallel ribs 12 extending on one side of the main body 11 along the longitudinal direction, and both sides of the main body 11. The fitting portion 13 is formed.

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 at right angles to the side edges at the same height as the rib height, and again bends at right angles to the main body portion 11 side. 13a, thereby forming a concave portion 13b. Further, the distal end portion 13a further has a protruding portion 13c protruding inward at the distal end thereof.

As shown in FIG. 2, the fitting strip 20 has a substantially C-shaped cross section as a whole, and has flat sides on both sides and a rear face. A groove 21 into which two distal portions 13a of the portion 13 are simultaneously fitted.
Are formed, and both side walls of the main body 1
Ridge 2 having the same shape as the recess 13b of the fitting portion 13
2a and 22b.

As shown in FIG. 3, the band-shaped main body 10 and the fitting band-shaped body 20 are composed of two band-shaped main bodies 1 as shown in FIG.
By pushing the fitting strips 20 from the main body 11 toward the fitting portion 13 in a state in which the side portions of 0, 10 are closely attached to each other with their side edges in close contact with each other, as shown in FIG. The portions 13a, 13a fit into the grooves 21 and the ridges 22
The a and 22b fit into the recesses 13b and 13b, respectively, so that the two belt-shaped body bodies 10 and 10 can be joined by the principle of a so-called male / female lock mechanism.

In such a fitting state, the dimensions of the main body 11 of the band-shaped body 10 and the back surface of the band-shaped body 20 for fitting are adjusted so that they are flush with each other to form a smooth surface. Stipulated.

In the above-described embodiment of the present invention, the rib 12 side of the belt-shaped body 10 is fitted by the fitting-shaped belt 20 which is fitted from the inside of the existing pipe. At this time, the fitting strip 2
It must be bonded with an adhesive or a sealant in addition to the mechanical coupling by 0.

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

The belt body 10 is bonded to the inner peripheral surface of the existing pipe by casting concrete between the sticking surface and the existing pipe and hardening the concrete. Note that the present invention is not limited to the above-described embodiment, and the shape of the fitting portion of the band body and the shape of the fitting band may be, for example, the seventh shape.
Modifications as shown in FIG. 8 and FIG. 8 are possible.

FIG. 7 shows a zigzag cross section of one end side of the fitting part of the strip-shaped body, and FIG. 8 shows a zigzag part at the tip of the same fitting part. The fitting band-shaped body has a shape adapted to it. In the example shown in FIG. 7, as in the previous embodiment, in addition to the mechanical connection by the fitting band, the adhesion must be performed. In the example shown in FIG. 8, mechanical bonding may not be expected in some cases, so bonding must be performed exclusively with an adhesive.

The shape of the rib of the belt-shaped body may be rectangular, trapezoidal, square, inverted trapezoidal or the like in addition to the above-mentioned T-shaped cross-section.

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

[0020]

As described above, according to the method of sticking to the inner peripheral surface of an existing pipe of the present invention and lining it, the pipe can be fitted from the side opposite to the sticking surface (that is, from the inside). By attaching the belt-shaped body to the inner peripheral surface from the inside of the existing pipe, the side edges can be easily joined.

Further, since a long belt-like body is spirally wound and repaired, lining suitable for the diameter of the existing pipe is easy, and lining is easy even for a long-distance existing pipe. Furthermore, since it is composed of two members, the band-shaped body and the fitting band-shaped body, the band-shaped body and the band-shaped body are adjusted in position to determine whether or not they are displaced, and then the fitting band-shaped body is fitted. It has the effect that the diameter of the helix does not shrink and taper because it can be merged.

[Brief description of the drawings]

FIG. 1 is a partial external perspective view of a belt 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 of fitting the belt-shaped body 10 to the fitting belt 20.

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

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

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

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

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Belt body 11 Body part 12 Rib 13 Fitting part 20 Fitting belt 30 Existing pipe

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B29L 23:00

Claims (1)

(57) [Claims] 1. A method for lining a strip-shaped body and a fitting strip on an inner peripheral surface of an existing pipe, which is formed into a strip as a whole, and the inner peripheral surface of the existing pipe is provided on both side edges in the width direction. The fitting part has a long shape that bends outward from the edge after rising to the side
The strip body formed is formed in the direction, of which at existing pipe
The step of sticking in a spiral shape along the peripheral surface, and the state where the strip-shaped body is arranged in parallel along the side edge portion in the existing pipe.
Ridges that can be fitted to the fitting portions that are adjacent to each other in a stationary state
A lining construction method for an existing pipe, comprising: a step of fitting a fitting strip formed in the longitudinal direction, and a step of adhering together with the fitting by the fitting.