JP2856602B2 - Deformed 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 for lining an inner surface of a deformed pipe such as a sewer, a gas pipe, and an agricultural water pipe.

[0002]

2. Description of the Related Art As one form of a lining method for the above purpose, as described in Japanese Patent Publication No. 55-43890, a lining method is used. Cylindrical liner made of flexible resin hygroscopic substance
50 is inverted or retracted by hydraulic or pneumatic pressure, and the supply guide tube 56
, Gradually inserted into the tube 51, the inserted liner 50
There is an in-pipe lining method in which the curable resin is cured by heating or by a light beam or a chemical reaction so that the inner surface of the pipe is lined.

[0003] Fig. 5 shows the overall configuration of a lining construction apparatus B used in the lining method according to the present invention, in which 52 is a container for accommodating the liner 50 in a folded state, and 53 is a liner 50.
A water supply device or the like for supplying water into the inside, applying water pressure, and inserting the liner 50 into the pipe 51 in an inverted state.

In such lining construction, 5
7,58 are manhole holes located at both ends of the pipe 51,
Both ends of the tube 51 are exposed in the holes 57 and 58.

[0005] By such a lining method, the inner surface of the pipe can be easily lined.

[0006]

However, such a conventional lining method still has the following problems to be solved.

That is, as shown in FIG. 6, when lining is applied to an irregularly shaped pipe using the lining method described above, the lining 50 is adhered along the inner surface of the pipe 51 to provide sufficient strength for reinforcement. To achieve this, the thickness of the liner 50 must be very large compared to a circular pipe.

Therefore, the liner thickness of the conventional method is 42 m
Up to m, the reinforced lining of deformed pipes may have a design thickness that is not possible.

It is an object of the present invention to provide a large-sized in-pipe lining method capable of solving the above-mentioned problems.

[0010]

According to the present invention, there is provided a tubular liner made of a flexible resin-absorbing material impregnated with a curable resin and surrounded by a fluid-impermeable membrane. In a modified pipe lining method in which the inserted liner is inserted by reversing insertion or retraction with water pressure or air pressure, and the inserted liner is heated to cure the curable resin, and the inner surface of the pipe is lined, Affixing a reinforcing plate made of fiber-reinforced plastic to the tube, then inserting a liner impregnated with a curable resin into the tube, and then flowing a heating fluid or the like into the liner to cure the curable resin of the liner, The outer peripheral surface and the reinforcing plate made of the fiber reinforced plastic are heat-fused to form a composite lining by integrating the liner and the reinforcing plate on the inner surface of the pipe. It is those related to irregular tube lining how.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a modified pipe lining method according to the present invention.

FIG. 1 shows the overall configuration of a lining construction apparatus A used in the method for lining a deformed pipe according to the present invention.

The lining device A has basically the same configuration as the lining device B in the above-mentioned prior art.

That is, in FIG. 1, reference numeral 11 denotes a rectangular agricultural drainage pipe buried underground, and both ends thereof are connected to manhole passages 17, 18 and rivers.

Reference numeral 10 denotes a cylindrical liner similar to that used in the lining method in Japanese Patent Publication No. 55-43890, which is substantially a film impregnated with a curable resin and impermeable to fluid. It consists of an enclosed flexible resin hygroscopic substance.

Reference numeral 16 denotes a supply guide pipe provided in the one side hole 17, and the rear end of the guide pipe 16 is connected to the front end of the pipe 11.

On the other hand, a liner inlet 16a is provided at the front end of the supply guide tube 16. The liner inlet 16a is connected to the liner inlet 16a by a liner pushing inversion mechanism (not shown) which pushes and inverts the liner 10. Are bound.

Further, in FIG. 1, 12 is a container for accommodating the liner 10 in a folded state, 13 is for supplying water to the liner 10 to apply water pressure, and inserting the liner 10 into the pipe 11 in an inverted state. It is a water supply device.

However, the lining apparatus A according to the present invention is different from the conventional lining apparatus B in that, as shown in FIGS.
A reinforcing plate 20 made of RP) is attached.

That is, as shown in FIGS. 2 and 3, in the present embodiment, the left and right and upper and lower inner surfaces of a tube 11 having a rectangular hollow cross section are shown.
A fixed-width, thin-walled reinforcing plate 20 extending in the axial direction is attached to each of 21, 22, 23, and 24. In addition, the reinforcing plate 20 need only be adhered to a necessary portion at a necessary width and length, and does not need to be adhered to the entire circumference of the pipe 11.

As the fiber reinforced plastic (FRP), various forms can be used, and preferably, glass fiber reinforced plastic (GFRP) can be used.

Next, a lining method using the lining construction apparatus A having the above configuration will be described with reference to FIGS.

First, the cylindrical liner 10 is pressed and inverted by the liner pushing inversion mechanism, and thereafter, the water supply device 13 is driven to inject water into the liner 10. By the way, since the front end of the liner 10 is fixed, as shown in FIG. 1, the outer film surface is turned inside by the water pressure, and the liner 10 is gradually inserted into the pipe 11.

In this insertion operation, as shown in FIGS.
Fiber reinforced plastics (F
RP).

Thereafter, although not shown, the hot water hose previously connected to the end of the liner 10 is naturally drawn into the pipe 11 as the insertion of the liner 10 proceeds.

When the insertion of the liner 10 is completed, warm water heated by a boiler car or the like is circulated through a hot water hose and heated to 85 ° C.

The heating by flowing the heating fluid into the liner 10 causes the thermosetting resin impregnated in the liner 10 to be completely cured. At this time, the outer peripheral surface of the liner 10 is reinforced by a fiber-reinforced plastic. The lining layer in which the liner and the reinforcing plate are integrated can be formed on the inner surface of the tube 11 by being thermally fused to the plate 20 and strongly integrated.

Such a lining layer becomes a flexible and strong culvert, and is capable of completely reviving an old pipe.

Moreover, in the present invention, unlike the conventional one, the lining layer has a composite lining in which a liner and a reinforcing plate are integrated, that is, a composite structure of a thermosetting resin layer and an FRP layer. Since the layer has a sufficient physical strength even with a small thickness, the thickness of the lining layer can be reduced as much as possible.

Therefore, it is possible to minimize the reduction of the cross-sectional area of the flowing water of the large-diameter and irregularly shaped pipe 11 due to the lining repair, and it is possible to sufficiently secure the water guiding function of the pipe.

Further, since the thickness of the liner 10 can be reduced as much as possible, the operation of pushing the liner 10 in reverse and the subsequent operation of inserting the liner 10 into the pipe 11 by water pressure can be easily performed.

Further, the thickness of the liner 10 can be reduced, which is economical.

FIG. 4 shows a modification of the reinforcing plate 20. The reinforcing plate 20 includes a saddle body composed of left and right side plates 20a and 20b and a top plate 20c connecting the upper ends of both side plates 20a and 20b. The saddle body is constituted by a bottom plate 20d which is separate from the saddle body.

With this configuration, even when the diameter of the pipe 11 is small, the reinforcing plate 20 can be disposed inside the pipe 11 while sliding, so that the lining method according to the present invention can be easily used. Can be.

[0035]

As described above, according to the present invention, a tubular liner made of a flexible resin-absorbing substance impregnated with a curable resin and surrounded by a fluid-impermeable membrane is provided inside an existing pipe. In the modified pipe lining method in which the inserted liner is gradually inserted into the pipe by water pressure or air pressure, or the drawn liner is heated to cure the curable resin, and the pipe inner surface is lined, A reinforcing plate made of a fiber-reinforced plastic is attached to the inside of the tube, and then a liner impregnated with a curable resin is inserted into the tube, and then a heating fluid or the like flows into the liner to cure the curable resin of the liner. Meanwhile, the outer peripheral surface and the reinforcing plate made of the fiber-reinforced plastic are heat-fused to form a composite lining by integrating the liner and the reinforcing plate on the inner surface of the tube. It is characterized in.

The composite lining layer has a composite structure in which a curable resin layer and a fiber reinforced plastic layer (FRP layer) are integrated by heat fusion, and the FRP layer is sufficient even if it is thin. Since it has mechanical strength, the thickness of the composite lining layer can be made as small as possible. Therefore, it is possible to suppress as much as possible the reduction of the cross-sectional area of flowing water of the large-diameter deformed pipe or the like due to the lining repair, and it is possible to sufficiently secure the water guiding function of the pipe.

Further, since the thickness of the liner can be made as thin as possible, the work of pushing the liner in and reversing it, and the subsequent work of inserting the liner into the pipe by water pressure can be easily performed, and the economic efficiency is further improved. be able to.

Accordingly, it is possible to reinforce a large-sized deformed pipe, which cannot be performed by the conventional lining method.

[Brief description of the drawings]

FIG. 1 is a conceptual configuration explanatory view of a lining construction apparatus used for a lining method according to the present invention.

FIG. 2 is a cross-sectional view taken along line II of FIG.

FIG. 3 is a sectional view taken along line II-II in FIG.

FIG. 4 is an explanatory diagram of a modification example of a reinforcing plate.

FIG. 5 is a conceptual explanatory diagram of a lining construction apparatus used in a conventional lining method.

FIG. 6 is a sectional view taken along line III-III in FIG. 5;

[Explanation of symbols]

 A Lining equipment 10 Liner 11 Pipe 20 Reinforcement plate

Claims (1)

(57) [Claims] 1. A tubular liner (10) made of a flexible resin-absorbing substance impregnated with a curable resin and surrounded by a fluid-impermeable membrane, is connected to a pipe (11) such as an existing pipe. within, water pressure, and insert the inverted insertion or retraction pneumatically to cure the inserted liner (10) pressurized heated with curable resin, the profiled pipe lining method as applied to the lining in the tube surface, firstly, Made of fiber reinforced plastic in the tube (11)
A reinforcing plate (20) was pasted and then impregnated with a curable resin
Insert the liner (10) into the tube and then inside the liner (10)
The heating fluid flows into the liner to harden the curable resin of the liner (10).
The outer peripheral surface and the fiber-reinforced plastic
Heat-fused with a reinforcing plate (20) made of
A method for forming an in-pipe lining, comprising forming a composite lining by integrating a liner (10) and a reinforcing plate (20) .