JP3954120B2 - A lining material that covers the inner surface of an existing tube rim and a lining material that includes a lining layer formed from the lining material - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lining material that covers the inner surface of an existing pipe used for rehabilitating an existing pipe such as a sewer.
[0002]
[Prior art]
In general, pipes such as sewage pipes buried in the ground are widely used such as fume pipes and ceramic pipes. The inner surface of these pipe rods is eroded by hydrogen sulfide, other corrosive gases and deposits, etc. due to long-term use, and deteriorates to reduce the thickness of the pipe and reduce its strength. In addition, the joint between the pipes is displaced due to earth pressure or ground subsidence, etc., and a crack or the like occurs in a part of the pipe due to the overload, etc., and groundwater enters the pipe from this part, Or the flowing water etc. flowing through the pipe may leak into the ground. There is a possibility that earth and sand around the pipe will flow out due to the intrusion or leakage of the groundwater or the like in the pipe and a hollow portion will be formed on the back of the pipe to cause a road surface depression or the like.
[0003]
As a countermeasure, the existing pipe burial buried in the ground to be rehabilitated is washed with an in-pipe washing car, etc., and then wound or folded in a state of being flatly folded on a lining material supply device provided on the ground. An uncured tube-like lining material containing a photo-curing resin, thermosetting resin or thermoplastic resin laminated with a tow rope connected to the tip of the tube lining material from one manhole to the other manhole The lining material accommodated in the lining material supply device is drawn into the existing pipe rod by being pulled by the traction device disposed on the ground via the.
[0004]
The lining material is pressed along the inner surface of the pipe by supplying compressed air, etc., and then the curable resin is cured by irradiation with an ultraviolet irradiation device, and the pipe rehabilitation of the existing pipe is covered with the lining layer. Construction methods have been developed.
[0005]
The lining material 100 used in this construction method is, for example, as shown in a partially broken explanatory view in FIG. 9, in which fibers such as glass fibers are knitted into a cylindrical shape, or are not woven into a woven or non-woven base material 101, 102. A resin layer 104 is formed by impregnating a curable resin 103 in a cured state, for example, an unsaturated polyester resin, and both the inner and outer surfaces of the resin layer 104 are covered with an inner thin film 105 and an outer thin film 106 such as a polyethylene film, respectively. 104 is protected.
[0006]
[Problems to be solved by the invention]
According to the pipe rehabilitation method for existing pipes, a pipe lining with a thin wall due to erosion, etc., because a resin lining layer is formed on the inner surface of the pipe, Significant improvement in strength can be obtained, and intrusion of groundwater and the like through the cracks and leakage from the pipe can be prevented. However, the lining material used in this construction method is formed by coating a cylindrical resin layer impregnated with an uncured curable resin on a base material with thin films such as an inner thin film and an outer thin film. When the lining material is drawn and introduced into the tube via the unsealed and fluid curable resin impregnated in the base material, the inner thin film and the outer thin film are pressed by the thin film or by its own weight. Since the inner thin film and the outer thin film are stretched or bent due to the tension at the time of drawing, the thickness of the lining material becomes non-uniform, and the inner peripheral surface of the lining layer that covers the existing pipe rod is smooth. In other words, unevenness and wrinkles are generated, resulting in an increase in frictional resistance against flowing water flowing in the pipe tub, resulting in a decrease in flow performance and a lack of uniform strength, which may lead to a decrease in strength. Also, during the work of drawing the lining material into the tube, the uncured curable resin flows in the thin film and the balance is lost, and the lining material stored in the lining material supply device suddenly collapses into the manhole and smoothly works. There is a problem such as that may interfere with.
[0007]
Therefore, the object of the present invention is to ensure a high quality rehabilitation pipe that has a smooth inner peripheral surface and improved running water performance, and can ensure improved strength, and smoother pipe rehabilitation of existing pipes. An object of the present invention is to provide a lining material that covers the inner surface of an existing pipe casing that enables work.
[0008]
[Means for Solving the Problems]
Lining material covering the existing sewer inner surface according to the present invention to achieve the above object, a curable resin in an uncured state into the existing sewer draw including tubing shaped lining material is supplied to the La innings material a lining material covering the existing sewer inner surface by forming a lining layer on the compressed air allowed to cure the curable resin while pressing the lining material into the existing sewer inner surface in existing sewer, the lining material but a resin layer tubular comprising a curable resin in an uncured state, includes an inner film and outer film covering the inner and outer surfaces of the resin layer, the above-mentioned resin layer, a tubular made of a fiber of being embedded base material and on the base material and the curable resin of the uncured impregnated, further to the above resin layer, a plurality of reinforcing members extending substantially parallel to the axis of the liner , And it is characterized in that it is embedded in at least one position and between the above base material and the inner film between the base material and the outer film.
The tube-shaped base material may be formed by knitting glass fibers or may be composed of two stacked tubes.
The reinforcing material may be embedded at both positions between the base material and the outer thin film and between the base material and the inner thin film.
The reinforcing material can be formed of a metal or flexible resin wire, a band or a wire, or a string or a band formed by knitting the wire or fiber. A belt-like body formed by knitting may be used.
The present invention also draws the lining material containing the curable resin in the uncured state into the existing tube tub, presses the lining material against the inner surface of the existing tube tub with the compressed air supplied into the lining, and presses the lining material And providing a tub having the lining layer obtained by curing the curable resin to form a lining layer in the existing tub.
[0009]
【Example】
Hereinafter, an embodiment of a lining material for covering the inner surface of an existing pipe rod according to the present invention will be described with reference to FIGS.
[0010]
1 is a partially broken explanatory view of the lining material 1, and FIG. 2 is a cross-sectional view taken along line AA of FIG.
[0011]
The lining material 1 is made of glass fiber, polyester fiber, or the like, and is knitted, woven or non-woven, and the tube-like base materials 2 and 3 are photocured resin such as unsaturated polyester resin in an uncured state, heat A resin layer 5 formed by impregnating a curable resin 4 such as a curable resin or a thermoplastic resin, and an inner thin film 6 and an outer thin film 7 such as a polyethylene film covering both the inner and outer surfaces of the resin layer 5. ing.
[0012]
Further, a plurality of reinforcing members 8, 8... Disposed so as to surround the base material 3 between the base material 3 and the outer thin film 7 so as to be substantially parallel to the axis A and close to the outer thin film 7 are cured. Embedded in the conductive resin 4.
[0013]
The reinforcing members 8, 8... Have a relatively large tensile strength and are made of a metal or flexible resin that has little elongation with respect to the tensile force and is formed of a long wire or strip along the axis A direction. . Further, the reinforcing members 8, 8... Can be formed by wires made of these metals or flexible resins, and further, these wires or high-strength carbon fibers, glass fibers, etc. are knitted. It is also possible to form a body or a belt-like body. The cross-sectional shape of the reinforcing members 8, 8,...
[0014]
Next, the pipe rehabilitation of the existing pipe with the lining material 1 formed in this way will be described.
[0015]
In FIG. 3, reference numerals 11 and 12 are manholes, and reference numeral 13 is an existing pipe rod that needs to be rehabilitated buried in the ground, such as a fume pipe or a ceramic pipe.
[0016]
The inner surface 13a of the existing pipe rod 13 is deteriorated by being exposed to hydrogen sulfide or other corrosive gas, etc. due to long-term use. May have occurred.
[0017]
As shown in FIG. 4, the pipe rehabilitation of the existing pipe rod 13 is performed by first spraying high-pressure water onto the inner surface 13 a of the pipe rod 13 with an in-pipe cleaning wheel 15 or the like, and then cleaning the inner surface 13 a of the tube rod 13. In order to facilitate the work and to introduce the lining material 1 into the tube rod 13 without being damaged by the tube rod inner surface 13a, the tube inner surface 13a is shown in FIG. A resin sheet 16 such as vinyl chloride is laid on the lower part, and a lubricant for improving slippage is applied to the upper surface.
[0018]
Then, a traction rope 18 connected to the tip 1a of the lining material 1 which is folded flatly on a lining material supply device 17 provided on the ground and wound around the drum 17a or stacked is laminated from one manhole 11. It is introduced and pulled by the pulling device 19 provided on the ground through the other manhole 12 through the existing pipe rod 13.
[0019]
As the tow rope 18 is pulled, the flat lining material 1 accommodated in the lining material supply device 17 is drawn out and pulled into the existing pipe rod 13 through the manhole 11, and is slid on the resin sheet 16 and the tip 1a thereof is moved to the other side. And then the resin sheet 16 is removed.
[0020]
When the lining material 1 is retracted by the traction rope 18, the tension force exerted on the lining material 1 acts on the reinforcing materials 8, 8,... Extending substantially parallel to the axis A, that is, in the direction in which the lining material 1 is retracted. The tension on the inner thin film 6 and the outer thin film 7 is not greatly reduced or exerted at all, and the flow of the uncured curable resin 4 during the drawing operation is prevented by the reinforcing members 8, 8. The thin film 6 and the outer thin film 7 are prevented from extending and bending. Therefore, the lining material 1 can be introduced into the existing pipe rod 13 while maintaining a uniform thickness.
[0021]
Further, when the lining material 1 is introduced into the manhole 11 from the lining material supply device 17, it is possible that the uncured curable resin 4 moves between the base material 3 and the outer thin film 7. Is prevented by. Therefore, the equilibrium state is maintained and the danger that the lining material 1 collapses rapidly into the manhole 11 is avoided, and the drawing operation of the lining material 1 into the existing pipe rod 13 can be achieved smoothly.
[0022]
Next, both ends of the lining material 1 drawn into the existing pipe rod 13 are cut from the positions protruding from the existing pipe rod 13 to the manholes 11 and 12, respectively, and then the tip 1a of the lining material 1 is cut as shown in FIG. In addition to closing, the compressed air is supplied from the other end 1 b into the lining material 1 to expand the lining material 1 and press it along the inner surface 13 a of the existing tube 13. Supply of the compressed air into the lining material 1 is performed from the ground through an air supply pipe 20 disposed in the manhole 11.
[0023]
On the other hand, an ultraviolet irradiation device 21 is disposed in advance inside the lining material 1 before the lining material 1 is expanded with compressed air, and a cord 21 a extending from the ultraviolet irradiation device 21 plugs a plug 22 that closes the lining material 1. It penetrates and is connected to the control device 23 on the ground. Then, each part of the lining material 1 is irradiated with ultraviolet rays from the ultraviolet irradiation device 21 that moves in the lining material 1 pressed against the inner surface 13a of the existing pipe rod 13 to cure the curable resin 4 in the lining material 1 to thereby cure the existing tube rod. The inner surface 13a of 13 is covered with a cured lining layer.
[0024]
After the lining material 1 is cured, as shown in FIG. 6 by cutting lines aa and bb, both ends are cut and the protruding portions in the manholes 11 and 12 are cut out together with the ultraviolet irradiation device. 7 is further removed, and as shown in FIG. 7, the joint ends of the both ends of the lining material 1 and the existing pipe rod 13 are covered with the curable resin 24 from the manholes 11 and 12 side, and the pipe on the inner surface of the existing pipe rod. Complete rehabilitation.
[0025]
Further, the lining material 1 is shown in a partially broken explanatory view in FIG. 8, and the same reference numerals are assigned to the portions corresponding to those in FIGS. 1 and 2, and detailed description thereof is omitted. In the meantime, a plurality of reinforcing materials 8, 8... Are added in the state of being embedded in the curable resin 4 along the inner peripheral surface of the base material 2 close to the inner thin film 6 in parallel with the axis A. Is also possible.
[0026]
According to the lining material that covers the inner surface of the existing pipe rod as described above, the tubular resin layer 5 containing the uncured curable resin 4, the inner thin film 6 and the outer thin film 7 that cover both the inner and outer surfaces of the resin layer 5. DOO comprises, regardless of the substantially simple to parallel buried a plurality of reinforcement 8, 8 ‥‥ configured in the axial direction of the base members 2 and 3 and the lining material in the resin layer 5 of the lining material, the lining material 1 It is possible to greatly reduce or eliminate the influence of the tension force on the inner thin film 6 and the outer thin film 7 during the pulling-in operation, and it is possible to prevent the inner thin film 6 and the outer thin film 7 from being stretched and bent and to be uncured. Since the flow of the curable resin 4 is prevented, the lining material 1 can be introduced into the existing pipe rod 13 with a uniform thickness, and the inner peripheral surface of the existing pipe rod inner surface is free from irregularities and wrinkles. Can be covered with a smooth lining layer. Inner improved water flow performance frictional resistance is reduced with respect to the flowing water flowing through, and uniform strength can be secured. Moreover, it has the effect that the operation | work which draws the lining material 1 in the pipe rod 13 can be performed smoothly. In addition, pipes with a lining layer formed from a lining material that covers the inner surface of the existing pipes described above are covered with a smooth lining layer, so that water flow performance is improved and uniform strength is ensured. Has been.
[0027]
【The invention's effect】
According to the lining material covering the inner surface of the existing pipe rod as described above, since the reinforcing material is embedded in the resin layer substantially parallel to the drawing direction, the inner thin film and the outer thin film are stretched or bent and uncured in the drawing operation. The flow of the curable resin is prevented, so that a smooth inner surface of the pipe can be obtained, the flow capacity can be improved by reducing the frictional resistance in the pipe, and the high strength of the rehabilitated pipe can be secured. The present invention has effects peculiar to the present invention such as renewal of quality existing pipes and smoothing of work.
[Brief description of the drawings]
FIG. 1 is a partially broken explanatory view showing an embodiment of a lining material that covers the inner surface of an existing pipe rod according to the present invention.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is an explanatory diagram of a pipe rehabilitation method for existing pipes using the lining material of the present embodiment.
FIG. 4 is also an explanatory view of a pipe rehabilitation method for an existing pipe rod using the lining material of the present embodiment.
FIG. 5 is also an explanatory view of a pipe rehabilitation method for an existing pipe rod using the lining material of the present embodiment.
FIG. 6 is also an explanatory diagram of a pipe rehabilitation method for an existing pipe rod using the lining material of the present embodiment.
FIG. 7 is also an explanatory diagram of a pipe rehabilitation method for an existing pipe rod using the lining material of the present embodiment.
FIG. 8 is a partially broken explanatory view showing another embodiment of the lining material covering the inner surface of the existing pipe casing in the present invention.
FIG. 9 is a partially broken explanatory view showing a lining material covering the inner surface of a conventional existing pipe rod.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lining material 2 Base material 3 Base material 4 Curable resin 5 Resin layer 6 Inner thin film 7 Outer thin film 8 Reinforcement material 13 Existing pipe rod 13a Inner surface

Claims (6)

Pull the tubular lining material containing the uncured curable resin into the existing pipe rod, and cure the curable resin with the lining material pressed against the inner surface of the existing pipe rod by the compressed air supplied into the lining material. A lining material that covers the inner surface of an existing pipe by forming a lining layer in the existing pipe,
The lining material includes a tube-shaped resin layer containing a curable resin in an uncured state, and an inner thin film and an outer thin film that cover both the inner and outer surfaces of the resin layer,
In the resin layer, a tube-shaped base material made of fibers is embedded, and the base material is impregnated with the uncured curable resin,
In the resin layer, a plurality of reinforcing materials extending substantially parallel to the axis of the lining material are further provided at least at a position between the base material and the outer thin film and between the base material and the inner thin film. Buried,
A lining material for covering the inner surface of an existing pipe casing. The lining material for covering the inner surface of an existing pipe wall according to claim 1, wherein the tubular base material is formed by knitting glass fibers. The lining material for covering the inner surface of the existing pipe rod according to claim 1 or 2, characterized in that the tube-shaped base material is composed of two tubes laminated. The reinforcing material is a wire or strip made of metal or flexible resin, a strip or wire, or a string or strip knitted from the wire or fiber. The lining material which coat | covers the existing pipe wall inner surface as described in any one of these. The lining material for covering the existing inner surface of the pipe tube according to claim 4, wherein the reinforcing material is a belt-like body formed by knitting glass fibers. The lining material containing the curable resin in an uncured state according to any one of claims 1 to 5 is drawn into an existing pipe rod, and the lining material is applied to the inner surface of the existing pipe rod by compressed air supplied into the lining. And a tub provided with the lining layer, obtained by curing the curable resin in the pressed state and forming a lining layer in the existing tube tub.

Images