JP2003193556A - Mending structure for pipeline - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mending structure for a pipeline hardly causing effluent of an odor causing component into a pressing medium. <P>SOLUTION: In this pipeline mending structure, a pipeline mending material 13 impregnated with a hardening resin is arranged inside the pipeline 2, and the hardening resin is cured for mending the pipeline. The pipeline mending material 13 is constructed of a cylindrical liner member 15 in which one face of a base material layer 18 impregnated with the hardening resin containing no styrene is covered with an inner layer surface layer part 19. The liner member 15 is arranged on the inside of the base material layer 18 so that the inner layer surface layer part 19 is exposed to the inside of the pipeline 2'. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipeline repair structure used for repairing pipelines such as drainage pipes buried in the ground.

[0002]

2. Description of the Related Art Conventionally, while a flexible tubular repair material for a pipeline is pressed and held on the inner wall of an underground pipe, the repair material for a pipeline is hardened, so that the pipe is installed inside the existing pipeline. Various methods for repairing a pipeline for forming a new pipeline with a repair material for line (liner) have been proposed.

An example of such a pipe repair method is disclosed in, for example, Japanese Patent Laid-Open No. 4-319135.
In this publication, a tubular outer layer liner member is integrally formed by covering the outer surface side of a base material layer in which a synthetic resin is supersaturatedly impregnated in a fiber layer with an impermeable outer surface layer portion, and a synthetic resin is formed in the fiber layer. A tubular inner layer liner member is integrally formed by covering the inner surface side of the base material layer impregnated unsaturated with an impermeable inner surface layer portion, and the outer layer liner member is disposed on the inner surface of the underground pipeline, and the outer layer liner member is formed. There has been proposed a repair structure for an underground conduit in which the base material layers are fitted inside and the inner layer liner member is mounted.

Another example of a method for repairing a pipeline is a liner hose (a repair material for a pipeline) in which a base material layer impregnated with a thermosetting resin is interposed between tubular impermeable films. Prepared, pull this liner hose into the pipeline, attach mounting jigs to both ends, connect the heating hose, and circulate hot water through the liner hose arranged in the pipeline through the heating hose. However, this is a method of repairing a conduit by curing a thermosetting resin and attaching this liner hose to the inner surface of the conduit.

Further, as the repair material for pipelines, the repair material for pipelines impregnated with a curable resin has flexibility, so that the repair material for pipelines can be easily arranged in the pipeline. The feature is that it is easily formed along the inner surface of the pipeline by the pressure of the pressing medium such as liquid or gas, and has excellent workability at the site, and the pipeline such as the drainage pipe buried in the ground is not dug back. It can be repaired from the inside.

[0006]

However, these repairing materials for pipelines are impregnated with a curable resin such as an unsaturated polyester resin, an epoxy acrylate resin or a urethane acrylate resin, and these curable resins are contained in these curable resins. A styrene monomer is used as the polymerizable monomer.

Generally, a styrene monomer is a very excellent raw material as a polymerizable monomer of a curable resin as far as various physical properties of a molded product are seen. However, depending on the material of the surface layer portion of the repair material for a pipe impregnated with these styrene monomers, the styrene monomer may slightly pass through the surface layer portion and exude to the outside. Here, since this styrene monomer is volatile and has an odor, even a slight penetration may harm the environment.

On the other hand, when repairing a pipeline, the innermost surface layer of the repair material for the pipeline needs to have durability against sewage flowing in the pipeline. Therefore, it is desirable to use a material having excellent wear resistance and chemical resistance as the material of the surface layer portion in order to secure the durability of the pipeline, and polyurethane is mainly used as the surface layer portion.

Here, when polyurethane is used as the surface layer portion, the permeation of styrene monomer is unavoidable, but the permeated small amount of styrene monomer exudes into the pressing medium. As a result, although water, hot water, steam, etc. as the pressing medium are slight, there is a concern that an odor may be generated and the environment may be affected when discarded.

On the other hand, many curable resin compositions containing no styrene monomer have been proposed. For example, it has been proposed to use an acrylic derivative having low volatility, that is, high molecular weight, instead of styrene (Japanese Patent Laid-Open No. 7-216).
040, Japanese Patent Application No. 7-245980). However, in these examples strength properties, water resistance,
Insufficient chemical resistance limits usage.

In addition, strength characteristics, without using styrene,
Various curable resin compositions having excellent water resistance and chemical resistance, low odor, and low toxicity and capable of radical curing have been proposed.

For example, JP-A-10-120736 discloses that (A) a polyol, a polyisocyanate and a hydroxyl group-containing vinyl ether compound as three essential components.
A polyurethane polymer containing at least one vinyl ether group, (B) a low molecular weight unsaturated polyester compound, (C) a vinyl ether compound, if necessary,
A curable resin composition comprising one or more diluting monomers selected from (meth) acrylic acid derivatives or vinyl carboxylates is disclosed, wherein the composition does not use styrene and has strength properties, water resistance and chemical resistance. Since it has excellent low odor and low toxicity and can be radical-cured, it is expected to be useful for civil engineering and construction materials such as pavement materials and lining materials where odor is a problem during formation.

Further, in JP-A-10-87770, a resin composition comprising a resin (A) containing a polymerizable unsaturated bond group and a polymerizable unsaturated monomer (B) is used. A curable resin composition containing oligoethylene glycol di (meth) acrylate and / or oligopropylene glycol di (meth) acrylate as an essential component as a saturated monomer (B) is disclosed, and such a curable resin composition is disclosed. Has excellent low odor and is applicable to civil engineering and building materials and covering materials.

However, no attempt has yet been made to impregnate such a curable resin composition into a repairing material for pipelines using a pressing medium for use.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve these conventional drawbacks, and an object thereof is to provide a repairing structure for a conduit in which an odor generating component is less likely to seep into a pressing medium.

[0016]

Means for Solving the Problems As a result of intensive studies made by the present inventors in order to achieve this object, it was found that a curable resin containing no styrene monomer should be used instead of a curable resin containing styrene monomer. The inventors have reached the first invention on the assumption that the above problems can be solved.

The present inventors have also used two cylindrical liner members integrally formed by covering the outer surface side of a base material layer impregnated with a curable resin with a surface layer portion, and one end of one liner member is used. When the other liner member is mounted so that the base material layers are aligned with each other while being inverted, if only the liner member of the base material layer on the side in contact with the pressing medium is impregnated with a curable resin that does not generate odor. Even if the other liner member is impregnated with a curable resin that generates an odor, the odor generating component contained in the other liner member is blocked by the layer of the curable resin that does not generate an odor. It is possible to block the exudation of odor-generating components into the pipe, and with such a configuration, it is necessary to replace all the resins with curable resins that do not generate odor as curable resins used for repairing materials for pipelines. But Since Kunar, prices considered to be repaired conduits be directly utilized or a inexpensive or physical properties superior curing resin.

Further, when two liner members are used in this way, if the conventional fixed concept of using resins having the same performance is removed, the characteristics of the resin impregnated into the two liner members are odorous. The second invention was reached, thinking that it could be widely used without being limited to the solution.

That is, the first aspect of the present invention is for a conduit for repairing a conduit by disposing a repair material for a conduit impregnated with a curable resin in the conduit and curing the curable resin. In the repair structure, the repair material for a pipeline is composed of a cylindrical liner member in which one surface of a base material layer impregnated with a curable resin containing no styrene is covered with an inner surface layer, and the liner member is The repair structure for a pipeline is characterized in that the surface layer of the inner layer is disposed inside the base material layer so as to be exposed inside the pipeline.

A second aspect of the invention is for a pipeline for repairing a pipeline by arranging a pipeline repair material impregnated with a curable resin in the pipeline and curing the curable resin. The repair material for a pipeline has a repair structure, and a tubular outer layer liner member in which one surface of an outer layer base material layer impregnated with a curable resin (A) is covered with an outer layer surface layer portion, and a curable resin (A). The inner layer base material layer impregnated with the curable resin (B) having a composition different from that of (1) is covered with a cylindrical inner layer liner member, and the outer layer liner member has a conduit for the outer surface layer portion. The inner layer liner member is disposed inside the outer layer liner member such that the outer layer base material layer and the inner layer base material layer face each other and the inner surface layer portion is exposed inside the conduit. It is a repair structure for pipes that has been characterized.

In the above invention, the thickness of the two liner members may be the same or different. For example, by making the thickness of the outer layer liner member different from the thickness of the inner layer liner member, the liner member for the purpose can be formed. A repair structure can be built.

If a curable resin having a lower gas permeability than the curable resin (A) is selected as the curable resin (B), the inner layer surface layer is made of a material that is more gas permeable than the outer layer surface layer. Even if formed, the permeation of the monomer in the curable resin from the surface layer of the inner layer can be suppressed.

Further, as a result, a curable resin containing a styrene monomer is selected as the curable resin (A),
Alternatively, even if a curable resin containing no styrene monomer is selected as the curable resin (B), it is possible to suppress the odor of the pressing medium while suppressing the deterioration of the physical properties, and to suppress the overall price.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an example of a pipeline to be rehabilitated by the repair method according to the present invention. This conduit 2
Pipe line, pipe diameter, pipe shape, etc. of the underground pipe 10 which is buried in the ground for draining sewage or for other purposes and which is bridged over a bridge and which forms the pipeline 2. Free to choose. For example, they are concrete fume pipes or earthenware porcelain pipes, etc., which are units. The shape is not limited to the circular tube shown in the figure, and may be an oval shape or a rectangular shape.

The pipeline 2 can be accessed from the ground through the manholes 1, 1, and the underground pipe 10 is cracked 11 over the entire pipeline 2 for some reason. Therefore, in the embodiment of the present invention, the crack 11 is repaired as a repair portion (or a rehabilitation portion).

The repair of the present invention is not limited to the repair of the crack 11, but also the rehabilitation of a pipe line that is simply aged without cracks, or for some reason as a self-supporting pipe on the inner surface of the new pipe. It may be rehabilitated when a repair material for pipelines is provided. In addition, if one end of the conduit 2 is accessible from the ground, both ends may not necessarily be accessible from the ground and may be a branch pipe.

For repairing when cracks 11 are formed in the entire conduit 2, a long tubular repair material (liner hose) 13 having a cylindrical shape as shown in FIG. 2 is used.

The pipe repair material 13 is a curable resin (A).
A cylindrical outer layer liner member 14 in which one surface of the outer layer base material layer 17 impregnated with the outer layer surface layer portion 16 is covered, and an inner layer impregnated with a curable resin (B) having a composition different from that of the curable resin (A). The inner layer liner member 15 has a cylindrical shape, and one surface of the base material layer 18 is covered with an inner surface layer portion 19. Further, by combining the outer layer base material layer 17 and the inner layer base material layer 18, the outer layer surface layer part 16 and the inner layer surface layer part 19 are exposed on the inner or outer surface.

Such a repair material for a pipeline can be manufactured, for example, by the following method. A cylindrical outer layer liner member 14 integrally formed by covering the outer surface side of the outer layer base material layer 17 impregnated with the curable resin (A) with the outer layer surface layer portion 16, and a curability different from that of the curable resin (A). A cylindrical inner layer liner member 15 integrally formed by covering the outer surface side of the inner layer base material layer 18 impregnated with the resin (B) with the inner layer surface layer portion 19 is prepared. The inner layer liner member 15 is replaced with the outer layer liner member 14
From one end side of the inner layer liner member 14, the base layer layers 17 and 18 are reversed so that they are aligned with each other, or the outer layer liner member 14 is mounted inside.
It is obtained by mounting the base material layers 17 and 18 inside from the one end side of the inner layer liner member 15 while inverting them so as to match each other.

At this time, the outer base material layer 17 is impregnated with the curable resin (A) in a supersaturated or unsaturated manner,
The inner base material layer 18 is unsaturatedly or supersaturated impregnated with the curable resin (B), and when the base material layers 17 and 18 are combined, a part of the curable resin (A) or the curability If the resin (B) is partially absorbed by the inner base material layer 18 or the outer base material layer 17, the adhesion between the outer base material layer 17 and the inner base material layer 18 is improved.

More specifically, this pipe repair material 13
Is, for example, a base hose (outer layer liner member) 14 and a calibration hose (inner layer liner member) 15.
The base hose 14 is composed of a gas barrier film (outer layer surface layer portion) 16 and an outer resin impregnated felt (outer substrate layer) 17 impregnated with the curable resin (A) fixed thereto. The calibration hose 15 is an inner layer impermeable film (inner surface layer).
19 and the inner layer resin absorbent felt 18 impregnated with the curable resin (B) fixed thereto.

The gas barrier film 16 is impermeable (the property of being impermeable and low in gas permeability) so that the curable resin does not penetrate, and an appropriate material is selected from the viewpoint of durability and cost. be able to. Specifically, for example, a multilayer film of polyolefin such as polyethylene or polypropylene and nylon (multilayer tube: PE
/ NY / PE) is illustrated, but a single layer may be used.

The inner layer impermeable film 19 is also water impermeable so that the curable resin does not permeate or evaporate, and the smoothness, scratch resistance, durability, etc. of the finished inner surface of the repair material 13 for the pipeline are taken into consideration. Then, an appropriate material is selected. They are,
For example, a polyurethane film or the like is used.

Further, the curable resin (A) takes into consideration the durability and mechanical properties (bending strength, bending elastic modulus, tensile strength, etc.) of the repair material 13 for pipes, handleability, cost, etc. A commercially available curable resin that is widely used for the pipe rehabilitation method is appropriately selected according to its purpose, and examples thereof include unsaturated polyester resins and curable resins such as epoxy acrylate resins as typical resins. The curable resin (A) may or may not contain a styrene monomer.

Further, in the second invention, the curable resin (B) may be a curable resin having a composition different from that of the curable resin (A). Here, different compositions mean different types, different mixing of fillers, different composition ratios, different colors depending on colorants, etc., and characteristics, functions, etc. They are used in appropriate combination depending on the purpose. Here, this curable resin (B)
Is preferably excellent in adhesiveness with the curable resin (A), but its characteristics after curing need not be exactly the same as those of the curable resin (A).

In a preferred embodiment of the present invention, as the curable resin (B), a curable resin which does not contain a styrene monomer, that is, does not emit styrene vapor is selected. As the curable resin containing no styrene monomer, a low odor curable resin such as a non-styrene unsaturated polyester resin, an epoxy acrylate resin (vinyl ester resin) or a urethane acrylate resin is exemplified as a typical resin. .

For example, as the curable resin (B),
(A) unsaturated polyester, (b) epoxy (meth) acrylate, (c) urethane (meth) acrylate,
(D) A curable resin composition composed of a polymerizable resin selected from unsaturated polyester acrylates and a polymerizable unsaturated monomer containing no styrene monomer can be used. Here, the polymerizable unsaturated monomer containing no styrene monomer is a polymerizable unsaturated monomer other than the styrene monomer that is curable by reacting with the polymerizable resin such as (a) to (d). Any material can be used, but it is preferable to select one having low odor. Examples of such a low-odor polymerizable unsaturated monomer include oligomers such as dimers (dimers) and trimers (trimers).

An example of such a low odor curable resin is disclosed in JP-A-9-151225 and JP-A-10-87770.
JP-A-7-216040, JP-A-10-
No. 120736 and the like, some of which are commercially available.

The proportion of the curable resin (B) in the total curable resin occupied in the pipe repair material 13 is small, that is, the thickness of the base hose 14 is sufficiently thicker than the thickness of the calibration hose 15. In the example of this embodiment, the overall performance of the pipeline repair material 13 is largely owed by the characteristics of the base hose 14.

Therefore, the curable resin (B) may be selected from those having a high function and excellent characteristics, ignoring the price. On the contrary, it is possible to employ a material having slightly inferior properties such as bending strength, bending elastic modulus and tensile strength when the pipe rehabilitation material is used as a self-supporting tube.

Therefore, as the curable resin (B),
In addition to curable resins that are commercially available for pipe rehabilitation method, low volatility curing that includes other general non-styrene unsaturated polyester resins used in other fields including construction and civil engineering fields. A wide range of resins can be used.

These curable resins (A) and (B) are
It may be room temperature curable, thermosetting, or photocurable including electron beam, but in the embodiment of the present invention, the curable resins (A) and (B) are the same as the case where a thermosetting resin is selected. This will be described below.

Examples of the fibrous material forming the outer base material layer 17 and the inner base material layer 18 include organic or inorganic fibers such as polyester, nylon, acryl, vinylon, carbon fiber, glass fiber, etc., and the form thereof is felt. However, it may be a general fibrous base material (for example, a knitted fabric, a nonwoven fabric, a web, a cloth such as a mat, or a laminate thereof).

Next, an example of a method for manufacturing this repair material for a pipeline will be described.

First, an appropriate material suitable for the purpose is prepared. As the material, the material of the base hose 14 and the calibration hose 15 which are not impregnated with the cylindrical curable resin having the outer diameter conforming to the diameter of the sewer pipe at the construction site is selected and cut into an appropriate length. It The base hose 14 and the calibration hose 15 have an outer surface made of an impermeable film, and a fibrous base material such as felt is integrated therein.

Then, the curable resin (A) to be contained
And (B) are mixed and adjusted, and the curable resin is impregnated into the felt layers of the base hose 14 and the calibration hose 15, respectively. The impregnated amount of the curable resins (A) and (B) may be supersaturated or unsaturated with respect to each felt. For example, it is adjusted so that the base hose 14 is impregnated with the supersaturated curable resin (A) and the calibration hose 15 is impregnated with the unsaturated curable resin (B).

By fixing one end of the base hose 14 and one end of the calibration hose 15, the inside and outside of the calibration hose 15 are reversed, the calibration hose 15 is inserted inside the base hose 14, and the repair material 13 for the pipeline is formed. It is formed.

This pipe repair material 13 includes a gas barrier film 16, an outer layer resin-impregnated felt 17 impregnated with a curable resin (A), and an inner layer resin absorption felt 18 impregnated with a curable resin (B). , Inner layer impermeable film 1
It has a tubular structure in which 9 are stacked.

The pipeline repair material 13 thus constructed is flexible in the state of being impregnated with the curable resin.
The tubular pipe repair material 13 can be stored by being flatly folded or rolled up. As a result, this repair material for pipeline 1
3 is flatly folded, rolled up for ease of transportation and construction, or folded and conveyed to the construction site in a stacked state. Of course, these series of operations including the step of impregnating the curable resin may be performed at the work site.

In such a repair material 13 for a pipe, a pressing medium is introduced so as to invert the inside and outside so as to face the inner surface layer portion 19, and the repair material 13 for a pipe is reversed by the action of the pressing medium. The pipeline can be repaired by loading the pipeline repair material 13 on the inner surface of the pipeline 2 and curing the curable resin.

Next, an example of work steps of a series of pipeline repairing methods including the manufacturing process of the pipeline repair material will be described with reference to FIGS.
Follow the explanation below. Here, S1 to S5 show the preparation process of the repair material 13 for pipelines in a factory, and S11 to S21 show the construction process on site.

First, in S1, an appropriate material suitable for the pipeline 2 to be repaired is prepared. As the material, the materials of the base hose base material 14A and the calibration hose base material 15A which are not impregnated with a curable resin are selected and cut into appropriate lengths.

The base hose base material 14A has a structure in which felt is laminated and held inside a tubular gas barrier film 16, and the calibration hose base material 15A is a tubular inner layer impermeable film. This is a structure in which felts are laminated and held inside 19.

Next, in S2, the curable resins (A) and (B) to be impregnated are mixed and adjusted, and the curable resins (A) and (B) are mixed with the base hose base material 14A and the calibration resin in S3. Hose base material 1
Each felt layer of 5A is impregnated.

In step S4, the calibration hose base material 15A is reversed and inserted into the base hose base material 14A. As a result, the calibration hose 14 is brought into direct contact with the outer layer resin-impregnated felt 17 and the inner layer resin-impregnated felt 18 inside the base hose 14, and the gas barrier film 16 is disposed on the outer layer of the tubular body, Has a tubular structure in which the inner layer impermeable film 19 is laminated.

Further, the pipe repairing material 13 has a tubular body which is flatly folded, and is wound or folded for ease of transportation and construction, stacked and kept at a low temperature by a refrigerating vehicle. In this state, it is transported to the construction site and can be expanded into a tubular shape having a diameter substantially equal to the inner diameter of the pipeline 2.

On the other hand, at the construction site, preparation for construction is started in S11, and in S12, the inside of the pipeline 2 is cleaned and an inspection by a television camera is carried out to confirm the presence or absence of a portion to be repaired.

Then, in step S14, the conduit repair material 13 is drawn from the cold storage car 3 into the conduit 2 by the winch 5 via the roll 4, the jigs (not shown) are attached to both ends, and the heating hose 7 ( Connect a and b). Here, since the conduit repair material is folded, it can be easily arranged in the conduit 2. The folded state is usually a state in which the tubular body is simply flattened and flattened, but it may be folded in three or multiple. The conduit repair material may be introduced into the conduit 2, and may be introduced into the manhole 1 in a partially expanded state, and its form is not limited.

Then, in S15, as shown in FIG. 5, water pressure is applied to the inside of the folded pipeline repair material 13 by a pressure unit to expand the pipeline repair material 13 to remove water (pressing medium). While circulating according to the arrow (7a goes to hot water, 7b returns to hot water), heating is performed by the boiler 6 to cure the curable resins (A) and (B) (S16).

As a result, the pipe repairing material 13 expands in the radial direction of the pipe 2 and is hardened in a state of being pressed against the inner peripheral surface of the underground pipe 10 to form a pipe-shaped self-supporting pipe. A liner is formed. At this time, even if the underground pipe 10 has a crack or the like, the crack will not be exposed to the newly rehabilitated conduit 2'being brought into close contact with the conduit repair material 13.

In accordance with steps S17 to S21, when hot water is cooled and drained, the pipe mouth is finished and there is a branch passage,
A mounting pipe is perforated by S19 and a branch path is attached. The final confirmation (TV survey) is performed and cleared by S20.

According to this structure, as shown schematically in FIG. 6, in the conventional conduit repair material 13 ′, the inner layer resin-impregnated felt 18 ′ is impregnated with the outer layer resin-impregnated felt 17. Since the same curable resin (A) as the curable resin (A) is impregnated, the styrene monomer contained in the curable resin (A) passes through the inner layer impermeable film 19. On the other hand, in the pipe repair material 13 according to the present invention, the curable resin (B) containing no styrene monomer is used in the inner layer resin-impregnated felt 18. The styrene monomer does not ooze out from the thermosetting resin (B), and the styrene monomer contained in the curable resin (A) in the outer layer resin-impregnated felt 17 is blocked by the inner layer resin-impregnated felt 18 and the inner layer is impregnated. Water impermeable film 19
Never ooze out.

The gas barrier film 16 is laminated on the outer layer of the repair material 13 for pipes to prevent the resin inside from leaking out of the repair material for conduits.

As a result, such a repair material 13 for pipelines is used.
According to the method, even when water, hot water, steam or the like is made to flow as a pressing medium (or a pressing heating medium) in the conduit 2'formed in the repair material for a conduit during transportation, styrene is applied to the pressing medium. The monomer does not exude. Even if air that may be heated is used as the pressing medium, styrene odor does not occur in the air as the pressing medium. As a result, the working environment can always be kept good, and the pressing medium can be disposed of without anxiety.

[0066]

[Modification 1] A modification of the second invention will be described below with reference to the drawings. Site members that are the same as or equivalent to those in the first embodiment of the invention are assigned the same reference numerals and detailed description thereof will be omitted.

This modified example 1 is intended to exemplify another method for manufacturing the repairing structure for a pipeline according to the first embodiment of the invention.

In this modified example 1, a cylindrical outer layer liner member 14 integrally formed by covering the outer surface side of the outer layer base material layer 17 impregnated with the curable resin (A) with the outer layer surface layer portion 16, and the curable material. A cylindrical inner layer liner member 15 in which the outer surface side of the inner layer base material layer 18 impregnated with the resin (B) is covered with the inner layer surface layer portion 19 and integrally formed is prepared.

Next, the step of disposing the outer layer liner member 14 in the conduit 2, the inner layer liner member 15 from one end side of the outer layer liner member 14 is reversed so that the base material layers 17 and 18 are aligned with each other. A repair structure for a conduit can be obtained by sequentially performing the steps of mounting inside the liner member 14.

The outer base material layer 17 is impregnated with the curable resin (A) in a supersaturated or unsaturated manner, and the inner base material layer 18 is impregnated with the curable resin (B) in an unsaturated or supersaturated manner. When the inner layer liner member 15 is attached to the outer layer liner member 14, a part of the curable resin (A) or a part of the curable resin (B) is removed from the inner layer base layer 18 or the outer layer base layer 1.
7 may be absorbed.

Also in this modification 1, the liner as the repair structure is provided with the manholes 1,
It is formed over the entire length of the conduit 2 between the two.

As shown in cross section in FIG. 7, this repairing structure for a conduit has an outer layer liner member 14 composed of an outer layer surface layer portion 16 and an outer layer base material layer 17, an inner layer surface layer portion 19 and an inner layer base material layer 1.
And an inner layer liner member 15 composed of 8 and.

The outer layer surface layer portion 16 and the inner layer surface layer portion 19 are formed by cylindrically forming a resin film or sheet material which is the same as or equivalent to that of the first embodiment of the invention. No holes or the like are formed in the outer surface layer portion 16 and the inner surface layer portion 19, and in both cases, complete impermeability between the inside and outside is secured.

The outer layer liner member 14 is formed integrally by adhering the outer layer base material layer 17 to the inner surface side of the outer layer surface layer portion 16, and the outer layer base material layer 17 is a room temperature curing type curable resin (A). It is impregnated with the unsaturated polyester resin or epoxy acrylate resin. The amount of resin impregnated in the outer layer base material layer 17 in this example is in a supersaturated state in which, for example, about 110% is impregnated when the amount (saturation amount) that the outer layer base material layer 17 can impregnate is 100%. The entire area of the outer base material layer 17 has a curable resin (A).
Is completely impregnated with no curable resin (A).

The inner layer liner member 15 is turned upside down during construction so that the inner layer surface layer portion 19 becomes the inner side and the inner layer base material layer 18 is formed.
Is mounted so that it is positioned to form the outer pipe line 2 ', and in a state before construction, the inner layer base material layer 18 is located inside the inner layer surface layer portion 19 in the same manner as the outer layer liner member 14. Thus, the inner base material layer 18 is in close contact with the inner surface layer portion 19 to be integrally formed.

The inner layer base material layer 18 contains the room temperature curable curable resin composition (B) containing no styrene monomer, but the impregnated amount thereof is slightly unsaturated. This is because the inner layer base layer 18 is the outer layer base layer 17
This is to absorb a part of the excess curable resin (A) impregnated in the resin and enhance the adhesion between the curable resin (A) and the curable resin (B). For this purpose, the amount of curable resin impregnated in each substrate layer may be supersaturated or unsaturated, or vice versa.

As a method for disposing such two inner layer liner members 15 and outer layer liner members 14 in the underground pipe 10, a known method is used as it is.

For example, the outer layer liner member 14 is inserted from one manhole 1 and positioned in a predetermined state over the entire length of the conduit 2 between the manholes 1. After that, as shown in FIG. 9, the end portion 14a of the outer layer liner member 14 facing the one manhole 1 is widened, and the tip end portion 15a of the inner layer liner member 15 is slightly inserted inside the end portion 14a.
As a result, the surface 17a of the outer base material layer 17 and the surface 18a of the inner base material layer 18 come into contact with each other.

After that, when a required water pressure is applied to the inner side of the tip portion 15a of the inner layer liner member 15 by a water supply device (not shown) such as a head pressure of a pump or a water tank, the water pressure causes the inner layer liner member 15 to move. Is advanced to the inner side of the outer layer liner member 14, and the inner layer liner member 15 is mounted inside the outer layer liner member 14.

When the other end of the inner layer liner member 15 is bound in a watertight manner, the other end is not inverted and the inside of the inner layer liner member 15 becomes a bottomed bag, so that the water pressure is the inner layer. The outer layer base material layer 17 and the inner layer base material layer 18 can be kept pressed together by acting outward from the surface layer portion 19 (on the tube wall side).

A part of the curable resin (A) impregnated in the outer layer base material layer 17 moves to the inner layer base material layer 18 to increase mutual adhesiveness, and the impregnation of the resin is uniformly corrected. However, since the non-styrene-based curable resin (B) is impregnated in the inner layer base material layer 18 on the side where water pressure acts, the inner layer base material layer 18 is contained in the curable resin (A). The styrene monomer thus formed can be prevented from passing through the inner surface layer portion 19.

In this state, the curing of the curable resin is awaited, after the resin is appropriately cured, the inner liner member 15 is drained and the other end of the inner layer liner member 15 is cut off to rehabilitate the pipeline. Complete.

[0083]

[Modification 2] In FIG. 2, when a conduit repair material having a structure in which the inner layer and the outer layer are reversed is used, when the conduit repair material is introduced into the conduit while being inverted, it is mounted on the conduit. The structure is the same as that of the embodiment of the invention. In this case, since the pressing medium is in contact with the inner surface layer portion 19 even if water pressure is used for reversal, the resin component impregnated in the outer base material layer 17 does not exude to the pressing medium. The same effect as the embodiment of the invention is expected.

As described above, in the first embodiment of the invention, the combination of the curable resin containing the styrene monomer and the curable resin not containing styrene has been described, but the working environment is not limited to the styrene monomer as the volatile monomer. It is clear that it can be applied to all penetrating ingredients that may harm the.

Further, when two liner members are used in this way, if the conventional fixed concept of using resins of the same performance is removed, the characteristics of the resin impregnated in the two liner members are Not limited to the solution, it can be widely used for other purposes.

Further, in the above-mentioned Embodiment 1, each base material layer is formed as a single layer, but each base material layer may be formed as a multi-layer structure, and each surface layer portion is also formed as a multi-layer structure. May be

[0087]

Second Embodiment Hereinafter, a second embodiment of the first invention will be described with reference to the drawings. Site members that are the same as or equivalent to those in the first embodiment of the invention are assigned the same reference numerals and detailed description thereof will be omitted.

The second embodiment of the present invention is the first embodiment of the present invention.
And a repairing structure for a conduit for repairing the conduit by disposing a repairing material for a conduit impregnated with a curable resin in the conduit and curing the curable resin. .

As shown in FIG. 10, the repair material 13 for pipelines
Is composed of a cylindrical inner layer liner member (liner member) 15 in which one surface of an inner layer base material layer (base material layer) 18 impregnated with a curable resin containing no styrene is covered with an inner layer surface layer portion 19. The inner layer liner member 15 is the inner layer surface layer portion 1.
9 is disposed inside the inner base material layer 18 so as to be exposed inside the conduit 2 ′.

Also in the second embodiment, the liner as the repair structure is formed over the entire length of the conduit 2 between the manholes 1 and 1 which are installed apart from each other.

The inner base material layer 18 contains the curable resin (B) containing no styrene monomer described in the first embodiment, but its thickness is in the state where the curable resin is cured. Thus, the inner pipe 10 is formed thicker than the inner base material layer 18 of the first embodiment of the invention so that the underground pipe 10 can be rehabilitated or repaired.

The inner layer liner member 15 is mounted such that the inner and outer sides are reversed during the construction so that the inner layer surface layer portion 19 becomes the inner side and the inner layer base material layer 18 directly contacts the inner wall 12 of the underground pipe 10. In the state before the construction, as shown in FIG. 11, the inner layer base material layer 18 is intimately formed integrally with the inner layer surface layer part 19 in a state where the inner layer base material layer 18 is located inside the inner layer surface layer part 19. ing.

As a method for disposing such an inner layer liner member 15 in the underground pipe 10, a known method is used as it is.

For example, as shown in FIG. 12, from one manhole 1 to one end of the underground pipe 10 to the inner layer liner member 1
5 is slightly inserted with the tip end portion 15a of No. 5 inverted. Thereby, the inner wall of the underground pipe 10 and the surface 1 of the inner base material layer 18
8a comes into contact with each other.

After that, when a required water pressure is applied to the inside of the tip portion 15a of the inner layer liner member 15 by a water supply device (not shown) such as a head pressure of a pump or a water tank, the water pressure causes the inner layer liner member 15 to move. Reverses to the inner part of the underground pipe 10, and the inner layer liner member 15 is
Is installed inside the.

If the other end of the inner layer liner member 15 is bound in a watertight manner, the other end is not inverted and the inside of the inner layer liner member 15 has a bottomed bag shape, so that the water pressure is the inner layer. The inner layer liner member 15 can be pressed from the surface layer portion 19 outwardly (on the pipe wall side) and can be kept pressed against the inner wall of the underground pipe.

Since the inner layer base material layer 18 is impregnated with the non-styrene type curable resin (B), the styrene monomer does not permeate the inner layer surface layer portion 19 and permeate the pressing medium.

In this state, the curing of the curable resin is awaited, after the resin is appropriately cured, the inner liner member 15 is drained and the other end of the inner layer liner member 15 is cut off to rehabilitate the pipeline. Complete.

In the second embodiment described above, the inner layer liner member 15 was directly applied to the inner wall of the underground pipe 10. However, even if another layer is included between the inner layer liner member 15 and the inner wall 12. Good.

Further, similar to the first embodiment of the invention, the base material layer and the surface layer portion are not limited to a single layer, and may be formed as a multi-layer structure.

For example, styrene is not contained as the curable resin impregnated in the outer layer base material layer 17 or the outer layer resin-impregnated felt 17 (see FIGS. 2 and 7 to 9) described in the first embodiment of the invention. When the curable resin is selected, it is clear that the effect of the first invention can be achieved even if another member or layer is interposed between the inner layer liner member 15 and the inner wall 12. In this case, the outer layer base material layer 17
If a curable resin not containing styrene is selected as the resin with which the inner layer base material layer 18 is impregnated, even if the type and composition of the curable resin impregnated with each are the same or different. May be.

[0102]

As described above, according to the present invention,
It is possible to provide a repair structure for a conduit in which an odor generating component is less likely to seep into a pressing medium.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a pipeline to be repaired according to an embodiment of the present invention.

FIG. 2 is a partial cutaway view for explaining a structure of a repair material for a pipeline according to an embodiment of the present invention with a perspective view.

FIG. 3 is a process diagram illustrating a method for manufacturing a pipeline repair material and a pipeline repair method using the pipeline repair material according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining a repairing condition of a pipeline according to an embodiment of the present invention by a cross section.

FIG. 5 is a cross-sectional view for explaining a repairing condition of the pipeline according to the embodiment of the present invention.

6 (a) and 6 (b) are explanatory views for explaining the reason why the repair material for a pipeline (or the repair structure for a pipeline) according to the second aspect of the present invention does not generate an odor, using an end face schematic diagram. is there.

FIG. 7 is a diagram illustrating a cross section of a repair structure for a pipeline according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a cross-sectional view illustrating a situation in which the repair structure for a pipeline shown in FIG. 7 is being manufactured.

FIG. 10 is a view for explaining a repair structure for a pipeline according to the embodiment of the present invention by a cross section.

FIG. 11 is a partial cutaway view for explaining the structure of the repair material for a pipeline according to the embodiment of the present invention with a perspective view.

12 is a drawing for explaining a situation in which the repair structure for a pipeline shown in FIG. 10 is being manufactured, with a cross section. FIG.

[Explanation of symbols]

1: Manhole 2: Pipe line 2 of existing pipe: Pipe line rehabilitated 10: Underground pipe 11: Crack 12: Inner wall 13: Repair material for pipe line 14: Base hose (outer layer liner member) 15: Calibration hose (Inner layer liner member or liner member) 16: Gas barrier film (outer layer surface layer part) 17: Outer layer resin impregnated felt (outer layer base material layer) 18: Inner layer resin impregnated felt (inner layer base material layer or base material layer) 19: Inner layer non- Water-permeable film (inner surface layer)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiromi Sugimori             1 Asahi at 547 Horinouchi, Kikugawa-cho, Ogasa-gun, Shizuoka Prefecture             Inside Tech Co., Ltd. F-term (reference) 2D063 EA08                 3H025 EA01 EB21 ED02 EE04

Claims (6)

[Claims] 1. A conduit repair structure for arranging a repair material for a conduit impregnated with a curable resin in the conduit to cure the curable resin to repair the conduit, The repair material for a pipeline is composed of a tubular liner member in which one surface of a base material layer impregnated with a curable resin containing no styrene is covered with a surface layer portion of an inner layer, and the liner member has a surface layer portion of an inner layer of A repair structure for a pipeline, which is disposed inside the base material layer so as to be exposed inside. 2. A pipeline repair structure for repairing a pipeline by disposing a pipeline repair material impregnated with a curable resin in the pipeline and curing the curable resin. The pipe repair material has a cylindrical outer layer liner member in which one surface of the outer layer base material layer impregnated with the curable resin (A) is covered with the outer layer surface layer portion, and the curable resin (A) has a different composition. A cylindrical inner layer liner member in which one surface of the inner layer base material layer impregnated with the curable resin (B) is covered with the inner layer surface layer portion, and the outer layer liner member is configured so that the outer layer surface layer portion contacts the inner surface of the conduit. The inner layer liner member is arranged inside the outer layer liner member such that the outer layer base material layer and the inner layer base material layer face each other and the inner layer surface layer portion is exposed inside the conduit. Repair structure for pipelines. 3. The repair structure for a pipeline according to claim 2, wherein the inner surface layer is made of a material having a gas permeability higher than that of the outer surface layer. 4. The outer surface layer is formed of a film that is impermeable and has low gas permeability, and the inner surface layer is formed of a film that is highly impermeable. The repair structure for the pipeline described in 2. 5. A curable resin containing a styrene monomer is selected as the curable resin (A), and a curable resin containing no styrene monomer is selected as the curable resin (B). The repair structure for a pipeline according to any one of claims 2 to 4. 6. The outer layer surface layer portion is composed of a film that is impermeable and has low gas permeability, and the inner layer surface layer portion comprises:
6. A repair for a pipeline according to claim 2, which is mainly composed of a material having good wear resistance and durability, and is composed of a film having a larger gas permeability than the outer surface layer portion. Construction.