JP2017155819A - Tunnel fire extinction pipe regeneration lining material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel fire extinction pipe repairing technology of which workability is superior and at the same time both a flow rate and inner pressure tolerance after work are consistent to each other.SOLUTION: A tunnel fire extinction pipe repairing lining material of this invention is a tubular lining material for use in forming a regeneration pipe within an existing fire extinction pipe in a tunnel and includes a reinforcing layer containing reinforced fiber base material immersed with hardening resin composition. Further, an inner diameter D[mm] and a total thickness t[mm] of the tubular lining material satisfy 0.880≤[D-2 t]/D≤0.996[I] and 100<D<300[II].SELECTED DRAWING: Figure 2

Description

  The present invention relates to a technique for rehabilitating a fire extinguishing pipe installed in a tunnel, particularly an old tunnel fire extinguishing pipe. More specifically, the present invention relates to a lining material for rehabilitating a fire extinguishing pipe in a tunnel.

  In preparation for a fire inside the tunnel, a fire hydrant for initial fire extinguishing is installed inside the tunnel. Such a fire extinguishing facility in the tunnel is configured by connecting fire hydrant devices installed at predetermined intervals in the longitudinal direction of the tunnel through a water supply pipe. In the event of a fire in the tunnel, the person who discovers the fire can immediately perform initial digestion by sprinkling water from the nearby fire hydrant to the fire site (for example, Patent Document 1). Tunnel fire extinguishing and water supply pipes used for such fire extinguishing are mainly made of metal pipes such as ductile cast iron pipes because heat resistance against heat during a fire is required.

  In recent years, aging of this metal fire extinguishing pipe has become a problem. In particular, tunnel fire extinguishing pipes installed in the northern region where anti-freezing agents are sprayed to prevent freezing of roads are prone to rust due to anti-freezing agents, and there are problems with aging such as pipe thinning due to rust. large.

  As a countermeasure against aging of such a metal fire extinguishing pipe, there is known a method of updating to a resin fire extinguishing pipe having rust prevention (for example, Patent Document 2).

JP 2001-571 A JP2011-239851A

  However, fire extinguishing pipes are usually installed in a state where they are buried in a concrete guard-covered passage, etc. In order to replace them with resin fire extinguishing pipes, concrete demolition, removal of buried soil, pipe replacement , Backfilling, concrete placement, etc. Therefore, renewal to plastic fire-extinguishing pipes requires various renewal costs, such as increased renewal costs, and long construction periods, which require traffic regulations such as long-term lane restrictions and traffic congestion. Problems arise.

  In order to solve the construction problem, a means for forming a rehabilitation pipe inside the existing fire extinguishing pipe can be considered. However, when the rehabilitated pipe is formed, the finished diameter (that is, the inner diameter of the rehabilitated pipe) is inevitably smaller than the inner diameter of the existing fire extinguishing pipe, and therefore the flow rate is reduced as compared to before construction. If the flow rate decreases too much, there will be a problem with the function of the fire-fighting piping that should discharge a large amount of fire-fighting water. In order to solve the problem of the decrease in the flow rate, a means for increasing the finished diameter can be considered. However, as the finished diameter is increased, the thickness of the rehabilitation pipe is reduced, and the internal pressure resistance is reduced. The decrease in internal pressure tolerance causes a problem in the function of the fire-extinguishing pipe through which high-pressure fire-fighting water should flow.

  In view of the above problems, an object of the present invention is to provide a technique for repairing a fire extinguishing pipe in a tunnel that has good workability and achieves both a flow rate after construction and resistance to internal pressure.

  In order to achieve the above object, the present invention includes the following invention relating to a lining material for rehabilitating a fire extinguishing pipe in a tunnel.

(1)
The tubular lining material of the present invention is a tubular lining material for forming a rehabilitation pipe inside an existing fire extinguishing pipe in a tunnel, and includes a reinforcing layer including a reinforcing fiber base impregnated with a curable resin composition. Including. Furthermore, the inner diameter D ₀ (mm) of the fire extinguishing pipe in the tunnel and the total thickness t (mm) of the tubular lining material satisfy the following formulas (I) and (II).
0.880 ≦ (D ₀ −2t) / D _o ≦ 0.996 (I)
100 <D ₀ <300 (II)

  Thus, workability | operativity becomes favorable by taking the structure of the rehabilitation pipe | tube using a tubular lining material as a repair means of the fire extinguishing piping in a tunnel.

Furthermore, the inner diameter D ₀ (mm) of the fire extinguishing pipe in the tunnel and the total thickness t (mm) of the tubular lining material are configured to satisfy the above formulas (I) and (II), thereby providing an existing pipe. When the diameter of the fire extinguishing pipe in the tunnel is within a predetermined range, the finished diameter with respect to the diameter of the existing pipe is set within the predetermined range, so that both the flow rate and the internal pressure resistance can be achieved after construction.

(2)
The tubular lining material of the above (1), the flow rate counts C ₁ of the inner circumferential surface of the rehabilitating pipe may be 130 greater.

  Thereby, the flow rate after construction can be increased.

(3)
The lining material for in-tunnel fire-fighting pipe rehabilitation according to (1) or (2) above may include a water stop layer laminated on a reinforcing layer, and the surface of the water stop layer may constitute the inner peripheral surface of the rehabilitation pipe.

  Thereby, the water-stopping property for ensuring the liquid-tightness of the renovated pipe against the high-pressure water inside the fire extinguishing pipe in the tunnel is improved.

(4)
The lining material for fire extinguishing pipe rehabilitation in any one of the above (1) to (3) has a total thickness t (mm) of 8.5 mm or less and a tensile strength in the circumferential direction of the rehabilitation pipe of 250 MPa or more. It may be.

  Thereby, after construction, a larger amount of flow and better internal pressure tolerance can be achieved.

It is typical sectional drawing of an example of the lining material for fire extinguishing piping renovation in a tunnel of this invention. The enlarged view of the square enclosure part of FIG. 1 is shown. FIG. 2 is a schematic cross-sectional view of a fire extinguishing pipe in a tunnel that has been repaired by the lining material of FIG. 1 (that is, the lining material is formed as a rehabilitation pipe). It is the elements on larger scale of the typical sectional view of the 1st modification of the lining material for fire extinguishing piping renovation in a tunnel of the present invention. It is a typical sectional view of the 2nd modification of lining material for fire extinguishing piping renovation in a tunnel of the present invention. FIG. 6 shows an enlarged view of a boxed portion in FIG. 5. It is the elements on larger scale of the typical sectional view of the 3rd modification of the lining material for fire extinguishing piping renovation in a tunnel of the present invention. It is the elements on larger scale of the typical sectional view of the 4th modification of the lining material for fire extinguishing piping renovation in a tunnel of the present invention. It is the elements on larger scale of the typical sectional view of the 5th modification of the lining material for fire extinguishing piping renovation in a tunnel of the present invention. It is the elements on larger scale of the typical sectional view of the 6th modification of the lining material for fire extinguishing piping renovation in a tunnel of the present invention. It is the elements on larger scale of the typical sectional view of the 7th modification of the lining material for fire extinguishing pipe rehabilitation of the present invention. The laminated tubular body before a curable resin is impregnated into the lining material of FIG. 1 is shown typically. An example of the method of obtaining the laminated tubular body of FIG. 12 is shown typically. An example of the method of obtaining the tubular fiber base material in FIG. 13 is shown typically. An example of the method of obtaining the laminated tubular body for obtaining the lining material of FIG. 4 is shown typically. An example of the method of obtaining the laminated tubular body for obtaining the lining material of FIG. 5 and FIG. 6 is shown typically. It is a typical fragmentary sectional view explaining the method of rehabilitating the fire-extinguishing pipe in a tunnel using the lining material of FIG. It is typical sectional drawing explaining the method of rehabilitating the fire extinguishing piping in a tunnel using the lining material of FIG. 5 and FIG. FIG. 19 is a schematic cross-sectional view illustrating the continuation of FIG. 18.

[1. Lining material]
FIG. 1 is a schematic cross-sectional view of an example of a lining material for rehabilitating a fire extinguishing pipe in a tunnel according to the present invention. FIG. 2 shows an enlarged view of the rectangular box portion of FIG. FIG. 3 is a schematic cross-sectional view of a fire extinguishing pipe in a tunnel that has been refurbished by the lining material of FIG. 1 (that is, the lining material is formed as a rehabilitation pipe). In FIG. 1 and FIG. 3, the thickness of each layer is shown with extreme emphasis for convenience of explanation. Further, FIG. 4 shows a partially enlarged view of a schematic cross-sectional view of a first modified example of the lining material for rehabilitating pipes in a tunnel according to the present invention. FIG. 5 shows a schematic cross-sectional view of a second modified example of the present invention, and FIG. 6 shows an enlarged view of a rectangular box portion of FIG. 7 and 8 are partial enlarged views of schematic cross-sectional views of a third modified example and a fourth modified example of the lining material for extinguishing piping in a tunnel according to the present invention, respectively.
Hereinafter, the lining material 100 and the rehabilitation pipe 800 shown in FIGS. 1 to 3 will be basically described. For the lining materials 100a, 100b, 100c, and 100d of the first to fourth modifications shown in FIGS. 4, 5 and 6, 7, and 8, respectively, the portions that are different from the lining material 100 are described. Description of the same parts as the other lining materials 100 is omitted.

[1-1. Basic configuration]
The lining material 100 shown in FIG. 1 has a tubular shape having a closed cross section. In FIG. 1, for convenience of explanation, the lining material 100 is shown in a circular shape in cross section. When it is introduced into a fire extinguishing pipe in a tunnel, it is usually crushed so as to reduce its bulk.

  As shown in FIG. 1, the lining material 100 of the present embodiment includes a reinforcing layer 210 and a water blocking layer 220 and an outer layer 230 laminated on both surfaces thereof. Of these, the water blocking layer 220 and the outer layer 230 are not essential components.

[1-2. Reinforcement layer]
The reinforcing layer 210 includes at least a fiber substrate including a reinforcing fiber substrate and a curable resin composition impregnated therein.

[1-2-1. Fiber substrate]
The reinforcing layer 210 is a fiber reinforced resin layer including at least a reinforcing fiber substrate. As shown in FIG. 2, the reinforcing layer 210 of the present embodiment includes a fiber reinforced resin layer 211 including a reinforced fiber base material, and a resin absorbent layer 212 including two resin absorbent base materials stacked on both sides of the fiber reinforced resin layer 211. Including. The resin absorption layer 212 is not an essential configuration.

  The reinforcing fiber base in the fiber reinforced resin layer 211 is a high-strength fiber base. Specifically, the strength of the fibers constituting the reinforcing fiber substrate may be 2000 MPa or more, preferably 2500 MPa, more preferably 3000 MPa or more in terms of tensile strength according to JIS R3420. The upper limit within the range is not particularly limited because the greater the tensile strength value, the greater the internal pressure resistance. However, since it is sufficient to satisfy the required internal pressure resistance as a fire extinguishing pipe in a tunnel, for example, 10,000 MPa, preferably 7500 MPa. It may be.

  If the reinforcing fiber base material has high strength, the fibers constituting it may have orientation or non-orientation. It is preferable that the reinforcing fiber base has an orientation from the viewpoint of increasing the strength of the reinforcing layer 210 and reducing the thickness.

  When the fibers constituting the reinforcing fiber base in the fiber reinforced resin layer 211 have orientation, the orientation direction may be a direction along the circumferential surface of the tubular lining material 100. Thereby, when the lining material 100 is formed as the rehabilitation pipe | tube 800 (refer FIG. 3), the fiber which comprises a reinforced fiber base material orientates in the direction along the surrounding surface of the rehabilitation pipe | tube 800. FIG. When including the circumferential direction in the component along the circumferential surface, the pressure resistance against the stress in the circumferential direction due to the high-pressure water in the fire extinguishing pipe can be obtained, and when the axial component is included in the component along the circumferential surface, Pressure resistance against axial stress due to high-pressure water in the fire-extinguishing pipe can be obtained.

  More specifically, the reinforcing fiber base material in the fiber reinforced resin layer 211 may include at least fibers oriented in the circumferential direction. Thereby, the pressure resistance with respect to the stress of the circumferential direction by the high pressure water in a fire extinguishing pipe is obtained efficiently. The reinforcing fiber base material may include fibers oriented in the axial direction in addition to fibers oriented in the circumferential direction. Thereby, the pressure resistance with respect to the stress of the axial direction by the high pressure water in a fire extinguishing pipe is obtained efficiently.

  The reinforcing fiber substrate in the fiber reinforced resin layer 211 has a weight of fibers oriented in the circumferential direction of 1 to 5 times, 1.5 times or more, preferably 4.5 times or less of the weight of fibers oriented in the axial direction. Most preferably, it may be 2 times. When the weight ratio of the fibers oriented in the circumferential direction is within the above range, the pressure resistance against the stress in the circumferential direction and the stress in the axial direction due to the high-pressure water in the fire extinguishing pipe is well balanced.

When the reinforcing fiber base in the fiber reinforced resin layer 211 includes fibers having orientation, the specific form of the fibers having orientation is not particularly limited. For example, a form in which continuous fibers are aligned in one direction and held by a weft auxiliary yarn (unidirection), a form in which a continuous fiber is used as a woven fabric (cross), and a plurality of fiber sheets in which the directions of fibers are aligned in one direction And the like (non-clip fabric) in which the fibers are stitched with the auxiliary yarns so that the directions of the fibers are different.
Moreover, when the reinforcing fiber base material in the fiber reinforced resin layer 211 includes non-oriented fibers, the specific form of the non-oriented fibers is the same as those exemplified in the chopped fiber and the resin absorbing base material described later. Things.

Basis weight of the fibers of the reinforcing fiber base in the fiber-reinforced resin layer 211, for example 500 g / ^{m 2} or more 3000 g / ^{m 2} or less, preferably may be at 1000 g / ^{m 2} or more 2500 g / ^{m 2} or less. It is preferable that the basis weight is not less than the above lower limit value from the viewpoint of obtaining good internal pressure resistance, and that it is not more than the above upper limit value is preferable from the viewpoint of preventing an increase in the total thickness.

  Examples of the material of the reinforcing fiber substrate in the fiber reinforced resin layer 211 include carbon fibers such as PAN (polyacrylonitrile) -based carbon fibers and pitch-based carbon fibers, inorganic fibers such as metal fibers, glass fibers, ceramic fibers, and boron fibers. It is done. These fibers may be used alone or in combination. Among these fibers, glass fibers are preferable in view of the strength and cost of the obtained fiber-reinforced resin molded product. In order to enhance the adhesion to the base resin, the fiber is preferably treated with a silane coupling agent such as an aminosilane surface treatment agent, an epoxysilane surface treatment agent, or an acrylic silane surface treatment agent.

  The average fiber diameter of the fibers constituting the reinforcing fiber base may be, for example, 10 μm to 40 μm, preferably 15 μm to 30 μm. It is preferable from an elastic viewpoint that an average fiber diameter is more than the said lower limit, and it is preferable from the point of tensile strength that it is below the said upper limit. The average fiber diameter is an average value of the maximum diameters of the plurality of fibers.

  The resin-absorbing base material in the resin-absorbing layer 212 is provided from the viewpoint of securing a thickness to the extent that the minimum external pressure strength is provided and / or from the viewpoint of securing a resin-rich layer than the fiber-reinforced resin layer 211. Therefore, it may be flexible, and the resin-absorbing base material in the resin-absorbing layer 212 does not need the strength as the reinforcing fiber base material in the fiber-reinforced resin layer 211. That is, the resin-absorbing base material in the resin-absorbing layer 212 may have a lower strength than the reinforcing fiber base material in the fiber-reinforced resin layer 211.

  The nonwoven fabric should just be a fiber base material comprised by a non-orientation (random orientation) fiber. As a specific form, it may be a porous body having flexibility and a large specific surface area, and may be composed of felt, mat, spunbond, or web containing continuous filaments or staple fibers. In addition, the strand is cut into a certain length, dispersed in a mat shape, and then uniformly applied with an adhesive such as a thermoplastic resin and thermally melted, and the strands are bonded together to form a chopped strand. A mat is preferred.

  As the material of the resin-absorbing base material in the resin-absorbing layer 212, glass fiber, metal fiber, polyester (for example, polyethylene terephthalate), polyolefin (for example, polyethylene, high-strength polypropylene), polyamide (for example, nylon, aramid), vinylon, polyacetal, poly Synthetic organic fibers such as paraphenylene benzoxazole; natural fibers such as kenaf and hemp. These fibers may be used alone or in combination.

  Since the resin-absorbing substrate in the resin-absorbing layer 212 is composed of non-oriented fibers, the fibers of the resin-absorbing substrate in the resin-absorbing layer 212 are entangled with the fibers of the reinforcing-fiber substrate in the fiber-reinforced resin layer 211. Thus, the fiber reinforced resin layer 211 can be integrated. Furthermore, when the reinforced fiber base material in the fiber reinforced resin layer 211 has orientation, the orientation can be maintained and the disorder of the orientation can be prevented by integrating in this way.

  By making the basis weight of the resin absorbing base material in the resin absorbing layer 212 smaller than the basis weight of the reinforcing fiber base material in the fiber reinforced resin layer 211, the resin absorbing layer 212 is configured to be more resin rich than the fiber reinforced resin layer 211. It's okay.

[1-2-2. Curable resin composition]
The curable resin composition that is the base material of the reinforcing layer 210 includes an uncured resin and a curing agent. The curable resin composition may be a thermosetting resin composition in which the uncured resin is a thermosetting resin, and is an active energy ray curable resin composition in which the uncured resin is an active energy ray curable resin. Also good.

  The thermosetting resin is not particularly limited. For example, epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol resin, melamine resin, cyanate ester resin, phenoxy resin, alkyd resin, urethane resin, furan resin, maleimide Examples thereof include a prepolymerized resin of a resin and a cyanate ester resin, a bismaleimide resin, a polyimide resin and polyisoimide resin having an acetylene terminal, and a polyimide resin having a nadic acid terminal. These resins may be used alone or in combination of two or more.

  Among the above-mentioned thermosetting resins, epoxy resin and furan resin are preferable in that the Vicat softening temperature is high and the heat resistance against fire in the tunnel is good, and the internal pressure resistance can be exhibited with a thinner layer thickness. And an epoxy resin is more preferable.

The epoxy resin is an epoxy prepolymer compound having one or more, preferably two or more epoxy groups. Specifically, it means at least one of a monomer having an epoxy group, an oligomer having an epoxy group, and a polymer having an epoxy group. The epoxy prepolymer compound preferably contains at least a monomer or an oligomer, and may be only a monomer or an oligomer.
Furthermore, examples of the epoxy prepolymer compound include a glycidyl ether type, a glycidyl amine type, a glycidyl ester type, and an alicyclic epoxy compound.

  The glycidyl ether type, glycidyl amine type and glycidyl ester type epoxy compounds can be obtained from a halide having a glycidyl alkyl group and an active hydrogen compound (alcohol, amine, carboxylic acid, respectively).

  Examples of glycidyl ether type epoxy compounds include bisphenol A type epoxy compounds, bromides of bisphenol A type epoxy compounds, hydrogenated products of bisphenol A type epoxy compounds, bisphenol F type epoxy compounds, bromides of bisphenol F type epoxy compounds, and bisphenol F type epoxies. Hydrogenated compounds, bisphenol S type epoxy compounds, o-, m-, p-cresol novolak type epoxy compounds, phenol novolac type epoxy compounds, naphthalene ring-containing epoxy compounds, biphenyl type epoxy compounds, biphenyl novolak type epoxy compounds, di Cyclopentadiene type epoxy compounds, phenol aralkyl type epoxy compounds, dihydroxypentadiene type epoxy compounds, and triphenylmethane type epoxidation Things like, and phenyl glycidyl ether, p-tert-butylphenyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, and allyl glycidyl ether.

Examples of the glycidylamine type epoxy compound include tetraglycidyldiaminodiphenylmethane, triglycidylaminophenol, tetraglycidylxylenediamine, glycidylaniline, glycidyl o-toluidine, and the like.
Examples of the glycidyl ester type epoxy compound include phthalic acid diglycidyl ester, terephthalic acid diglycidyl ester, dimer acid diglycidyl ester, and the like.

  An alicyclic epoxy compound is a compound having an aliphatic ring and an epoxy group, and more specifically, an alicyclic epoxy group (an epoxy composed of two adjacent carbon atoms and oxygen atoms constituting the alicyclic ring). And a compound having an epoxy group directly or indirectly bonded to an aliphatic ring.

  The compound having an alicyclic epoxy group is preferably a compound in which two alicyclic epoxy groups are linked by a single bond or a divalent linking group. Examples of the alicyclic epoxy group include a cyclohexene oxide group. Examples of the divalent linking group include a divalent hydrocarbon group, a carbonyl group, an ether bond, an ester bond, a carbonate group, an amide group, and a group in which a plurality of these are linked. For example, 3 ′, 4′-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (for example, Celoxide 2021P manufactured by Daicel Corporation), ε-caprolactone modified 3 ′, 4′-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxy A rate (for example, Celoxide 2081 manufactured by Daicel Corporation) is preferable. Other examples of the compound having an alicyclic epoxy group include 1,2-epoxy-4-vinylcyclohexane (for example, Celoxide 2000 manufactured by Daicel Corporation) and 3-methacryloyloxymethylcyclohexene having one alicyclic epoxy group. Examples thereof include oxide, 3-acryloyloxymethylcyclohexene oxide, and 3-vinylcyclohexene oxide.

Examples of furan resins include furan resins and modified furan resins.
A furan resin is a polymer or precursor (oligomer) of a furan or furan derivative having one or more reactive substituents on the furan ring as a starting material. Furfuryl alcohol type, furfuryl alcohol / furfural Furan resins such as co-condensation type, furfuryl alcohol / aldehyde co-condensation type, furfural / ketone co-condensation type, furfural / phenol co-condensation type, furfuryl alcohol / urea co-condensation type, furfuryl alcohol / phenol co-condensation type It is done.
Examples of the modified furan resin include furan resins subjected to modifications such as epoxy modification, phenol modification, aldehyde modification, urea modification, and melamine modification.
Among the above-mentioned furan resins, furfuryl alcohol type and furfuryl alcohol / formaldehyde co-condensation type furan resins are preferable because they are industrially stably supplied.

The active energy ray curable resin is not particularly limited as long as it has a radical polymerizable functional group and is polymerized and cured by irradiation with active energy rays (such as ultraviolet rays). The radical polymerizable functional group is a functional group that can be polymerized by active energy rays, and examples thereof include a (meth) acryl group and an allyl group. Examples of the active energy ray-curable resin having a radical polymerizable functional group include a urethane (meth) acrylate resin, an unsaturated polyester resin, and a vinyl ester resin. These resins may be used alone or in combination of two or more.
The above-mentioned diluents can be used alone or in combination of two or more.

  A so-called latent curing agent is used as the curing agent. The latent curing agent is a compound that is activated by dissolution, decomposition, transition reaction, etc., triggered by heating and / or irradiation with active energy rays, and functions as a curing accelerator for thermosetting or active energy ray curable resins. is there. For this reason, the lining material 100 is included in an inactive state as a curing agent until it is subjected to curing conditions in the existing pipe 900.

  The curing agent can be appropriately determined by those skilled in the art based on the type of the uncured resin. Therefore, as long as the uncured resin can be cured, it may be a compound activated by the action of heat, and it may be active such as light (especially ultraviolet rays), electromagnetic waves (especially X-rays) and electron beams. The compound activated by the action of energy rays may be used, or both may be combined.

For example, when the uncured resin is an epoxy resin, it is preferable that the curing agent lowers the viscosity of the uncured resin, ensures an appropriate curing rate, and does not elute after curing. From such a viewpoint, specific examples include amine-based curing agents such as aliphatic polyamines, aromatic polyamines, and alicyclic polyamishi. Among the curing agents, an aliphatic polyamine having a very low viscosity, excellent physical properties after curing, and inexpensive is more preferable. Specific examples of the aliphatic polyamine include polyoxypropylenediamine, trimethylolpropane poly (oxypropylene) triamine, metaxylenediamine, 1,3-bis (aminomethyl) cyclohexane, and modified products thereof.
The above curing agents may be used alone or in combination of two or more.

For example, when the uncured resin is a furan resin, examples of the curing agent include organic acids such as organic sulfonic acids and organic carboxylic acids and aqueous solutions thereof, inorganic acids such as hydrochloric acid, sulfuric acid and phosphoric acid, and aqueous solutions thereof.
Examples of the organic sulfonic acid include p-toluenesulfonic acid, benzenesulfonic acid, xylenesulfonic acid, methanesulfonic acid and the like. Examples of the organic carboxylic acid include malonic acid, succinic acid, maleic acid, oxalic acid, acetic acid, lactic acid, malic acid, tartaric acid, benzoic acid, citric acid and the like. The above exemplified curing agents may be used alone or in combination of two or more.

Furthermore, when the uncured resin is a furan resin, as the curing agent, the thermal reaction type latent acid curing agent is used alone or in combination with the obvious curing agent for the purpose of shortening the curing time and pot life. May be used.
Examples of the apparent curing agent include organic acids such as organic sulfonic acids and organic carboxylic acids and aqueous solutions thereof, inorganic acids such as hydrochloric acid and sulfuric acid, and aqueous solutions thereof.
The heat-reactive latent acid curing agent is not particularly limited as long as it does not easily react with the components contained in the furan resin at room temperature and reacts quickly by heating during curing to generate an acid. The heat-reactive latent acid curing agent is at least one of inorganic ammonium salt, primary amine salt, secondary amine salt, and tertiary amine salt from the viewpoints of stability at normal temperature and reaction rate by heating at the time of curing. It is preferable to contain.
Specifically, the thermal reaction type latent acid curing agent contains at least one of ammonium halide, ammonium sulfate, ammonium nitrate, methyl ammonium halide, dimethyl ammonium halide, ethyl ammonium halide, and diethyl ammonium halide. It is more preferable. Examples of the halogen include chlorine, bromine and iodine. Among them, it preferably contains at least one of ammonium chloride, ammonium bromide, ammonium sulfate, ammonium nitrate, methylammonium chloride, dimethylammonium chloride, ethylammonium chloride, diethylammonium chloride, and contains at least one of ammonium chloride and ammonium bromide. It is more preferable to contain.

The curable resin composition may contain additives other than those described above.
For example, from the viewpoint of preventing dimensional change, the curable resin composition may include a normal salt composed of a strong acid and a cobase. For example, sodium chloride, potassium chloride, lithium chloride, sodium bromide, potassium bromide, lithium bromide, sodium sulfate, potassium sulfate, lithium sulfate, sodium nitrate, potassium nitrate, lithium sulfate and the like can be mentioned. These normal salts are particularly useful in the case of a furan-based resin that easily undergoes a dimensional change due to the diffusion of moisture contained from the condensation reaction during synthesis of the furan resin and moisture generated from the curing reaction.

From the viewpoint of reducing the viscosity or adjusting the reactivity, the curable resin composition may contain a diluent. The diluent may be a non-reactive diluent or a reactive diluent.
Examples of non-reactive diluents include dioctyl phthalate, dibutyl phthalate, and benzyl alcohol.
Examples of the reactive diluent include reactive monomers and derivatives thereof (derivatives having a polymerizable group). For example, when the uncured resin is an epoxy resin, phenol, cresol, ethylphenol, propylphenol, p-tert-butylphenol, p-tert-amylphenol, hexylphenol, octylphenol, nonylphenol, dodecylphenol, octadecylphenol and terpenephenol Examples thereof include monoglycidyl ethers of phenols such as those having a glycidyl ether group at the terminal. For example, when the uncured resin is a furan resin, furfuryl alcohol and furfural are included.

From the viewpoint of improving strength properties, the curable resin composition may contain an inorganic filler having a pH of 10 or less, such as glass powder, silica, talc, kaolin, mica, and aluminum hydroxide. (The pH of the inorganic filler is 0.5 g of inorganic filler in a 100 ml Erlenmeyer flask with a stopper, and then 100 ml of distilled water is added and sealed. Using a stirrer at a temperature of 23 ± 5 ° C., it is 600 rpm. Stir and extract for 24 hours at the number of rotations, and measure the pH of the supernatant after standing in accordance with JISZ8802 “Method for measuring pH.” The inorganic filler is surface-treated with the silane coupling agent described above. It's okay.
From the viewpoint of defoaming during mixing of the curable composition, the curable resin composition may contain an antifoaming agent. Types of antifoaming agents include: silicone defoamers such as oil-type silicone defoamers and emulsion-type silicone defoamers; defoaming polymer-type defoamers such as nonionic polyethers; special nonionic surfactants Polyether modified methyl alkyl polysiloxane copolymer; polyethylene glycol type nonionic surfactant; and vegetable oil-based antifoaming agent.

The component constituting the curable resin composition preferably has a boiling point at 1 atm of over 150 ° C., preferably over 160 ° C., more preferably over 170 ° C. This can prevent the volatile components from being filled in the tunnel during construction.
The components constituting the curable resin composition described above preferably have a flash point at 1 atm of over 50 ° C., preferably over 160 ° C., more preferably over 170 ° C. This can prevent a fire due to volatile component filling in the tunnel during construction.

  The curable resin composition does not contain any component having a boiling point at 1 atm of 170 ° C. or less, preferably 160 ° C. or less, and more preferably 150 ° C. or less (0% by weight). Even in this case, it is preferable that the total is more than 0 wt% and 1 wt% or less, preferably more than 0 wt% and 0.5 wt% or less. This can prevent the volatile components from being filled in the tunnel during construction.

  In the case where the curable resin composition does not contain any component having a flash point at 1 atm of 70 ° C. or less, preferably 60 ° C. or less, more preferably 50 ° C. or less (0% by weight), or contains it Even so, it is preferable that the total is more than 0 wt% and 1 wt% or less, preferably more than 0 wt% and 0.5 wt% or less. This can prevent a fire due to volatile component filling in the tunnel during construction.

Components having a boiling point of 170 ° C. or less, preferably 160 ° C. or less and more preferably 150 ° C. or less and / or components having a flash point of 70 ° C. or less, preferably 60 ° C. or less, more preferably 50 ° C. or less at the above-mentioned 1 atm. Applicable solvents include various solvents (particularly organic solvents). In addition, components such as a low-boiling monomer, a curing agent, and a diluent can be used.
In the present invention, a component having a boiling point of 170 ° C. or lower, preferably 160 ° C. or lower, more preferably 150 ° C. or lower and / or a flash point of 70 ° C. or lower, preferably 60 ° C. or lower, more preferably 50 ° C. or lower. (0% by weight) or even if it is included, it is more than 0% by weight and not more than 1% by weight, preferably more than 0% by weight and not more than 0.5% by weight. A curable resin composition is preferred.

[1-2-3. Physical properties]
When the curable resin composition becomes a molded product (after curing), the curable resin composition is more rust-proof than the metal pipe 910 (see FIG. 3) of the existing pipe 900.
Furthermore, when the curable resin composition becomes a molded product, the Vicat softening temperature is, for example, 85 ° C or higher, preferably 90 ° C or higher, more preferably 100 ° C or higher, and further preferably 200 ° C or higher. . As a result, the heat resistance during a fire in the tunnel is improved. In particular, when the uncured resin of the curable resin composition is a furan resin, the Vicat softening temperature may be 100 ° C. or higher. The Vicat softening temperature can be measured according to JIS K7260.

The circumferential tensile strength of the reinforcing layer 210 after curing may be 250 MPa or more, preferably 400 MPa or more, and more preferably 500 MPa or more. As a result, the pressure resistance against high-pressure water in the fire-extinguishing pipe is improved, so that a sufficient water pressure as a fire-extinguishing facility can be loaded.
The tensile strength can be measured according to JIS K7164.

[1-2-4. Thickness]
The thickness of the reinforcing layer 210 may be 10% to 100%, preferably 20% to 100% of the total thickness of the tubular lining material 100. When the waterproof layer 220 is included like the lining material 100, the thickness of the reinforcing layer 210 is 0.2 to 6 times, preferably 0.5 to 4 times, more preferably the thickness of the waterproof layer 220. May be 0.5 times or more and 2 times or less. More specifically, the thickness of the reinforcing layer 210 may be, for example, 6.0 mm or less, preferably 1.0 mm or more and 6.0 mm or less, more preferably 2.0 mm or more and 5.0 mm or less. It is preferable that the thickness of the reinforcing layer 210 is equal to or more than the lower limit value in terms of obtaining a better reinforcing effect by the fibers, and it is preferable that the thickness is equal to or less than the upper limit value in terms of preventing an increase in the total thickness.
In the reinforcing layer 210, the ratio of the thickness of the fiber reinforced resin layer 211 including the fiber reinforced base material may be 50% or more, preferably 70% or more of the reinforcing layer 210. Thereby, the internal pressure resistance can be obtained satisfactorily. Since the reinforcing layer 210 may include only the fiber reinforced resin layer 211 without including the resin absorbing layer 212, the thickness ratio of the fiber reinforced resin layer 211 may be 100%. When the reinforcing layer 210 includes a resin absorbing layer, the upper limit value in the ratio range of the thickness of the fiber reinforced resin layer 211 may be, for example, 95%, preferably 90%. Thereby, the minimum external pressure tolerance can be obtained as a fire extinguishing pipe in the tunnel.

[1-3. Still water layer]
The water blocking layer 220 is laminated on the side corresponding to the inside of the rehabilitation pipe 800 (see FIG. 3). Thereby, the liquid tightness of the rehabilitation pipe 800 is ensured. The water-stopping layer 220 is preferably a continuous tubular shape that is seamless in the circumferential direction from the viewpoint of obtaining better liquid-tightness of the rehabilitation pipe 800 against high-pressure water.
Furthermore, the water blocking layer 220 preferably has a smooth inner surface 221 of resin on the side corresponding to the innermost part of the rehabilitation pipe 800. As a result, the flow resistance against the high-pressure water in the fire extinguishing pipe after the rehabilitation can be reduced and the liquid can be passed at a good flow speed, and the flow rate can be increased.

  The thickness of the water blocking layer 220 may be, for example, 0.5 mm or more and 1.5 mm or less, preferably 1 mm or more and 2.5 mm or less, more preferably 1.5 mm or more and 2 mm or less. It is preferable that the thickness is equal to or greater than the above lower limit value in terms of obtaining a good water-stopping property, and that the thickness is equal to or less than the upper limit value is preferable in terms of preventing an increase in total thickness.

As shown in FIG. 2, the water blocking layer 220 in the lining material 100 is made of only resin. The resin constituting the water blocking layer 220 may be a thermoplastic resin such as a polyolefin resin such as polyethylene or polypropylene, and a fluororesin.
In addition, as will be described later, the water-stopping layer of the lining material may further include a fiber base (see FIGS. 4 and 6). When the water blocking layer 220 includes a fiber base material, the fiber base material may be a woven fabric or a non-woven fabric. It is preferable that the fiber base material has a tubular shape that is continuous in the circumferential direction from the viewpoint of obtaining better liquid-tightness of the rehabilitation pipe with respect to high-pressure water.

The lining material 100a shown in FIG. 4 is an example in the case where the water blocking layer includes a fiber base material, and the other points are the same as the lining material 100. In the water blocking layer 220a of the lining material 100a, the resin layer 225a is covered on the surface of the fiber-containing resin layer 226a. The fiber-containing resin layer 226a is impregnated with a curable resin composition in a fiber base 226a ′ (see FIG. 15 described later) described later. The boundary between the fiber-containing resin layer 226a and the resin layer 225a is not flat because of the unevenness of the surface shape of the fiber base material 226a ′, and the resin constituting the resin layer 225a enters the unevenness. As a result, an anchor effect is obtained, and the resin layer 225a is hardly peeled off from the fiber-containing resin layer 226a. Further, since the curable resin composition impregnated in the fiber-containing resin layer 226a is integrated with the curable resin composition included in the above-described reinforcing layer 210, the curable resin composition between the waterproof layer 220a and the reinforcing layer 210 is integrated. Prevents peeling.
Since the resin layer 225a is provided on the side corresponding to the innermost part of the rehabilitation pipe, it constitutes the inner peripheral surface 221a. The resin layer 225a may be made of a thermoplastic resin such as a polyolefin resin such as polyethylene or polypropylene, and a fluororesin.

  The lining material 100b shown in FIGS. 5 and 6 is another example in the case where the water blocking layer includes a fiber base material, and is otherwise the same as the lining material 100. In the water blocking layer 220b of the lining material 100b, a fiber base material (for example, a nonwoven fabric) is impregnated with a curable resin composition. In this case, the curable resin composition is the same as that described as the curable resin composition included in the reinforcing layer 210 described above. It is preferable that the basis weight of the fiber base material in the water blocking layer 220 b is smaller than the basis weight of the fiber in the reinforcing layer 210 and is more resin-rich than the reinforcing layer 210. Thereby, a better water-stopping property can be obtained.

  In order to obtain the inner peripheral surface 221b of the water-stopping layer 220b as a smooth cured surface (inner peripheral surface 821b) after the construction, as shown in FIG. 5, a tubular release film 300 is disposed inside the lining material 100b. Good. The tubular release film 300 has a continuous tubular shape, and is configured such that the outer peripheral length thereof is the same as the peripheral length of the inner peripheral surface 221b so that the entire inner peripheral surface 221b can be covered smoothly. The tubular release film 300 is folded and arranged as shown in FIG. The tubular release film 300 is pressed against the inner peripheral surface 221b during construction of the lining material 100b and before curing (described later), and is removed after curing, so that a smooth cured surface obtained from the inner peripheral surface 221b is exposed. . As a result, the flow resistance against the high-pressure water in the fire extinguishing pipe after the rehabilitation can be reduced and the liquid can be passed at a good flow speed, and the flow rate can be increased.

  The tubular release film 300 is preferably an airtight (gas barrier) film in order to prevent the volatile components from being filled in the tunnel during construction. Specifically, it may include at least a polyamide resin exemplified as a resin constituting the outer layer 230 described later. Specifically, like a later-described outer layer 230c, a polyamide resin layer may be used as an inner layer, and a multilayer structure in which a polyolefin resin layer is laminated on both surfaces thereof may be provided.

The lining material 100d shown in FIG. 8 is an example in the case of not having a water blocking layer, and the other points are the same as the lining material 100b. In the lining material 100d, the surface of the reinforcing layer 210 forms an inner peripheral surface 221d. When there is no water stop layer as in this example, the reinforcing layer 210 preferably includes a fiber reinforced resin layer 211 and a resin-absorbing layer 212 that is richer in resin than the fiber reinforced resin layer. Thereby, a better water-stopping property can be obtained.
Further, in this case, in order to obtain the inner peripheral surface 221d of the resin absorbing layer 212 of the reinforcing layer 210 as a smooth cured surface (inner peripheral surface 821d), the tubular release film 300 may be disposed inside the lining material 100d. . Similar to the above-described lining material 100b, this tubular release film 300 has a smooth cured surface obtained from the inner peripheral surface 221d by pressing the inner peripheral surface 221d during construction and removing it after construction (after curing). Is exposed. As a result, the flow resistance against the high-pressure water in the fire extinguishing pipe after the rehabilitation can be reduced and the liquid can be passed at a good flow speed, and the flow rate can be increased. The tubular release film 300 is the same as that described for the lining material 100b.

[1-4. Outer layer]
The outer layer 230 prevents the rehabilitation pipe 800 (see FIG. 3) formed from the lining material 100 and the existing pipe 900 from being bonded. Specifically, adhesion between the metal pipe 910 constituting the existing pipe 900 and the mortar lining 920 is prevented. As a result, the rehabilitation pipe 800 does not follow the existing pipe 900, but allows sliding between the surfaces facing each other. In this case, the local distortion of the existing pipe 900 caused by seismic motion or the like can be reduced as the overall distortion of the rehabilitation pipe 800.
Further, the outer layer 230 can block intrusion water such as groundwater when the lining material 100 is constructed.
Further, the outer layer 230 has a volatile resin composition, particularly a volatile component (for example, a component having a boiling point of 170 ° C. or less, preferably 160 ° C. or less, more preferably 150 ° C. or less at 1 atm, and a flash point of 70 at 1 atm. C. or less, preferably 60.degree. C. or less, more preferably 50.degree. C. or less), and gas barrier properties that prevent permeation of the volatile components can be exhibited.

  The resin constituting the outer layer 230 is selected according to the above-described characteristics that the outer layer 230 has. For example, at least a polyamide-based resin is preferably included. Examples of polyamide resins include polycapramide (nylon-6), poly-ω-aminoheptanoic acid (nylon-7), poly-ω-aminononanoic acid (nylon-9), polyundecanamide (nylon-11), poly Lauryl lactam (nylon-12), polyethylenediamine adipamide (nylon-2,6), polytetramethylene adipamide (nylon-4,6), polyhexamethylene adipamide (nylon-6,6), poly Hexamethylene sebamide (nylon-6,10), polyhexamethylene dodecamide (nylon-6,12), polyoctamethylene adipamide (nylon-8,6), polydecamethylene adipamide (nylon-10 8), caprolactam / lauryl lactam copolymer (nylon-6 / 12), caprolactam / ω-aminononanoic acid copolymer (nylon-6 / 9), cap Lolactam / hexamethylenediammonium adipate copolymer (nylon-6 / 6,6), lauryllactam / hexamethylenediammonium adipate copolymer (nylon-12 / 6,6), ethylenediamine adipamide / hexamethylenediammonium Adipate copolymer (nylon-2,6 / 6,6), caprolactam / hexamethylenediammonium adipate / hexamethylenediammonium sebacate copolymer (nylon-6 / 6,6 / 6,12), ethyleneammonium adipate / Hexamethylene diammonium adipate / hexamethylene diammonium sebacate copolymer (nylon-6 / 6,6 / 6,10). These resins may be used alone or in combination.

The outer layer 230 may be a single layer as shown in FIGS. 2, 4, 6, and 8, but as illustrated in FIG. 7, the outer layer 230 is a multilayer including a polyamide resin layer and other layers. There may be.
The lining material 100c shown in FIG. 7 is the same as the lining material 100 except that the outer layer is a multilayer. The outer layer 230c in the lining material 100c has a multilayer structure in which a polyamide resin layer 232c is an inner layer and a polyolefin resin layer 234c is laminated on both surfaces thereof. As a result, tearing during construction of the lining material 100c is prevented and a volatile component (for example, a component having a boiling point at 1 atm of 170 ° C. or less, preferably 160 ° C. or less, more preferably 150 ° C. or less, and flammability at 1 atm). The emission of components having a point of 70 ° C. or lower, preferably 60 ° C. or lower, more preferably 50 ° C. or lower can be prevented.

  The thickness of the outer layer 230 may be, for example, 0.1 mm or more and 0.2 mm or less, preferably 0.1 mm or more and 0.3 mm or less, more preferably 0.1 mm or more and 0.2 mm or less. It is preferable that the thickness is equal to or more than the lower limit value in terms of easily exhibiting the above-described characteristics by the outer layer 230, and it is preferable that the thickness is equal to or less than the upper limit value in terms of preventing an increase in the total thickness.

[1-5. Other examples]
The configuration of the lining material for rehabilitating pipes in a tunnel according to the present invention is not limited to the above-described lining materials 100, 100a, 100b, 100c, and 100d, and the layers may be arbitrarily combined. Furthermore, as already described, the reinforcing layer may not be formed of the resin absorbing layer 212 but may be composed of the reinforced resin layer 211 alone. Other modifications are shown in FIGS. 9, 10, and 11.

The lining material 100e shown in FIG. 9 includes a reinforcing layer 210e that does not include a resin absorbing layer and is configured only by the reinforced resin layer 211, and an outer layer 230c having a multilayer structure, and the tubular release film 300 is disposed inside. Yes.
10 includes a reinforcing layer 210 having a multilayer structure and an outer layer 230c having a multilayer structure, and a tubular release film 300 is disposed therein.
A lining material 100g shown in FIG. 11 includes a waterstop layer 220a having a multilayer structure, a reinforcing layer 210 having a multilayer structure, and an outer layer 230c having a multilayer structure.

[1-6. Total thickness]
The total thickness t (see FIGS. 1 and 3) of the lining material 100 is related to the inner diameter (diameter) D ₀ (see FIG. 3) of the existing pipe 900 by the following expressions (I) and (II): Meet.
0.880 ≦ (D ₀ −2t) / D _o ≦ 0.996 (I)
100 <D ₀ <300 (II)

In the formula (I), when the value of (D ₀ -2t) / D _o is 0.880 or more, a large finished diameter is secured and a good flow rate is obtained. Moreover, when the value of (D ₀ -2t) / D _o is 0.996 or less, the thickness of the rehabilitated tube is secured and good internal pressure resistance is obtained. From the viewpoint of more preferably obtaining these effects, the value of (D ₀ -2t) / D _o may be preferably 0.970 or more and 0.995 or less.

  The total thickness t is the thickness of the portion that should constitute the rehabilitation pipe. When the tubular release film 300 is laminated like the lining materials 100b, 100d, 100e, and 100f, the total thickness t The thickness of the mold film 300 is not included.

  More specifically, the total thickness t of the lining material 100 may be, for example, 8.5 mm or less, preferably 6 mm or less, and more preferably 5 mm or less. Thereby, since the rehabilitation pipe 800 having a large finished inner diameter is formed, a sufficient flow rate can be secured in the fire extinguishing pipe even after rehabilitation. Further, since the lining material 100 is light, particularly when it is introduced into the existing pipe 900 by a retraction method, the retraction load can be reduced. The lower limit value of the total thickness range of the lining material 100 is not particularly limited, but may be, for example, 1 mm, preferably 2 mm, from the viewpoint of ensuring strength.

[1-7. Stacking order]
The illustrated lining materials 100, 100 a, 100 b, 100 c, 100 d, 100 e, 100 f, and 100 g are shown as an example for a drawing method. However, the lining material of the present invention may be used for the retraction method or the reversal method. Therefore, when the illustrated lining materials 100, 100a, 100b, 100c, 100d, 100e, 100f, and 100g are used for a reversal method, the order of lamination may be reversed from the illustrated one.

[1-8. Inner surface]
The inner peripheral surface 221 of the lining material 100, 100c, the inner peripheral surface 221a of the lining material 100a, the inner peripheral surface 221b of the lining material 100b, and the inner peripheral surface 221d of the lining material 100d constitute the inner peripheral surface of the regenerated pipe after curing. To do. In the present invention, the inner peripheral surface of the rehabilitated pipe refers to the inner peripheral surfaces 221 and 221a in the rehabilitated pipe obtained from the lining materials 100, 100a, and 100c, and the rehabilitated pipe obtained from the lining materials 100b and 100d. This indicates the hardened surfaces of the inner peripheral surfaces 221b and 221d.

Flow rate coefficient C ₁ of the inner circumferential surface of the rehabilitating pipe may be for example 120 or more. Thereby, a good flow rate can be obtained after construction. From the viewpoint of obtaining this effect better, the flow coefficient C ₁ may be preferably more than 130, more preferably more than 140. Incidentally, the flow rate coefficient C _1, as shown in the equation below Hazen Williams, is determined by measuring the pressure loss when flowing the predetermined amount of water to the tube of a predetermined length.

h = 10.666 ・ C ₁ ^-1.85・ D ^-4.87・ Q ^1.85・ L
h: Piping friction loss head (m)
C ₁ : Flow coefficient D: Inner diameter of pipe (m)
Q: Flow rate (m ³ / sec)
L: Pipe length (m)

To increase the flow rate coefficient C _1, it may be reduced to h of the above formula. Specifically, increasing the smoothness of the inner peripheral surface of the rehabilitation pipe can be mentioned. Therefore, there is a tendency that the inner circumferential surface of the rehabilitating pipe is increased flow velocity coefficient C ₁ as is the resin-rich. For example, among the above-described lining materials, the lining materials 100, 100a, 100c, and 100g do not include fibers in the innermost peripheral layer, and therefore the innermost peripheral layers such as the other lining materials 100b, 100d, 100f, and 100e are fibers. as compared to those containing, flow rate coefficient C ₁ of the rehabilitating pipe obtained increases. Further, when the reinforcing layer 210 is composed of the fiber reinforced resin layer 211 and the resin absorbent layer 212 laminated on both surfaces thereof like the lining materials 100d and 100f, the resin absorbent layer 212 is more than the fiber reinforced resin layer 211. if configured in resin-rich, as compared with the reinforcing layer 210e as lining material 100e is constituted only of a fiber reinforced resin layer 211, a flow rate coefficient C ₁ of the rehabilitating pipe obtained increases.
Furthermore, among the resin forming the inner circumferential surface of the rehabilitating pipe, the more hydrophobic resins such as polyolefins and fluorine resin, tends to flow rate coefficient C ₁ is increased.

[2. Production method]
The method for producing the lining material of the present invention is not particularly limited, and can be appropriately determined in consideration of the layer configuration and the circumferential continuity of the tubular body. Hereinafter, the manufacturing method of the lining material of this invention is demonstrated using FIGS. 12-16.

  FIG. 12 schematically shows the laminated tubular body 100 ′ before the lining material 100 is impregnated with the curable resin. In the drawings after FIG. 12, the thickness of each layer is shown with extreme emphasis. A laminated tubular body 100 ′ shown in FIG. 12 is applied to a fiber base material 210 ′ (specifically, a reinforcing fiber base material, or a reinforcing fiber base material and a resin absorbing base material) constituting the reinforcing layer 210, for example, as described later. Thus, the water blocking layer 220 and / or the outer layer 230 are laminated (the tubular release film 300 may be disposed therein). After obtaining this laminated tubular body 100 ′, the lining material 100 can be obtained together with the reinforcing layer 210 by impregnating the fiber base material of the laminated tubular body 100 ′ with the curable resin composition. Examples of the impregnation method include a method of impregnating the curable resin composition while degassing the voids of the fiber base material of the laminated tubular body 100 ′ by reducing the pressure by vacuum suction or the like. In this method, voids in the unimpregnated fiber base act as a degassing path, and the curable resin composition flows during decompression to efficiently replace the voids in the fiber base. Can do.

  The laminated tubular body 100 ′ is formed by forming a water blocking layer 220 on the fiber base material 210 ′ constituting the reinforcing layer 210 and further covering with the outer layer 230 (may be inserted into the tubular outer layer 230). You may get. FIG. 13 schematically shows an example of a method for obtaining the laminated tubular body 100 ′. In FIG. 13, a water-stopping layer 220 having an inner peripheral surface 221 (shaded surface in the figure) is formed on the outer peripheral surface of the tubular fiber substrate 210 ′, and then the inner peripheral surface 221 is reversed by turning the inner and outer sides in reverse. The laminated tubular body 100 ′ can be obtained by facing the inner side and enclosing the outer side with a film for the outer layer 230. The water blocking layer 220 can be formed by coating a resin composition for a water blocking layer containing a thermoplastic resin (for example, a polyolefin resin such as polyethylene and polypropylene) on the fiber substrate 210 ′ by extrusion coating. . Forming the water-stopping layer 220 in this manner is preferable in that the water-stopping layer resin composition enters the irregularities on the surface of the fiber substrate 210 ′ and is difficult to peel off due to the anchor effect after solidification.

The tubular fiber substrate 210 ′ may be manufactured as a continuous tubular fiber substrate. Alternatively, as shown in FIG. 14, the sheet-like fiber substrate is formed into a tubular shape and joined together. It may be manufactured. Tubularization of the sheet-like fiber base material may be performed by overlapping one end portion and the other end portion to be joined together, and joining each end portion to each other at the overlapped portion ( The same applies to all the sheet-like fiber base materials to be tubularized).
Furthermore, when the fiber base 210 ′ is composed of a reinforcing fiber base having orientation and a non-oriented resin absorbent base material laminated on both surfaces thereof, a sheet-like non-oriented resin absorbent base material, Reinforced fiber base material having a sheet-like orientation and a sheet-like non-oriented resin-absorbing base material are stacked in this order and integrated by entanglement of adjacent base fibers by needle punching or the like, Thereafter, the tubular fiber substrate 210 ′ can be manufactured by forming a tube.

  FIG. 15 schematically shows an example of a method for obtaining the laminated tubular body 100a 'for obtaining the lining material 100a. In FIG. 15, a resin composition for a water blocking layer containing a thermoplastic resin (for example, polyolefin resin such as polyethylene or polypropylene) is extrusion coated on the outer peripheral surface of a tubular fiber base material 226 a ′ constituting the water blocking layer 220 a. A resin layer 225a having an inner peripheral surface 221a (shaded surface in the figure) is formed. The tubular fiber substrate 226a 'may be a woven fabric or a non-woven fabric. In particular, when the tubular fiber substrate 226a ′ is a woven fabric, the tubular fiber substrate 226a ′ has a uniform thickness due to the configuration in which the fibers are continuous in the circumferential direction, and the water-stopping layer resin composition is a substrate. Good anchorage can be secured by the anchor effect due to entering the surface irregularities.

  After forming the resin layer 225a, a water-stopping layer core tube is obtained by inverting the inside and outside so that the inner peripheral surface 221a faces inward. A laminated tubular body 100 a ′ can be obtained by drawing the water-stopping layer core tube into the inside of the tubular fiber substrate 210 ′ and wrapping the outside with a film for the outer layer 230.

  After obtaining this laminated tubular body 100a ', the fiber base material of the laminated tubular body 100a' is impregnated with the curable resin composition. The curable resin composition is impregnated into the fiber substrate 210 'and the fiber substrate 226a'. Thus, the lining material 100a can be obtained together with the fiber-containing resin layer 226a and the reinforcing layer 210 of the water blocking layer 220a.

  FIG. 16 schematically shows an example of a method for obtaining the laminated tubular body 100b 'for obtaining the lining material 100b. The fiber base material 220b 'forming the water stop layer 220b in a tubular shape is obtained. Lamination of the waterproof layer core into the tubular fiber substrate 210 ′, wrapping the outside with a film for the outer layer 230, and housing the tubular release film 300 folded inside the waterproof layer core tube A tubular body 100b ′ can be obtained.

  After obtaining this laminated tubular body 100b ', the fiber base material of the laminated tubular body 100b' is impregnated with the curable resin composition. The curable resin composition is impregnated into the fiber substrate 210 'and the fiber substrate 220b'. Thus, the lining material 100b can be obtained together with the water blocking layer 220b and the reinforcing layer 210.

  A laminated tubular body for obtaining the lining material 100d can be obtained in the same manner as the laminated tubular body 100b 'except that the fiber base material 220b' is not used. Specifically, after obtaining the tubular body of the fiber substrate 210 ′ (see FIG. 14), the outer side is wrapped with the film for the outer layer 230 and the tubular release film 300 folded inside is obtained. Can do. The fiber base material of the obtained laminated tubular body is impregnated with the curable resin composition. The fiber base 210 'is impregnated with the curable resin composition. Thus, the lining material 100b can be obtained together with the reinforcing layer 210.

  In order to obtain a laminated tube for obtaining the lining material 100c, a film for the outer layer 230c having a multilayer structure in which the polyamide-based resin layer 232c is used as the inner layer and the polyolefin-based resin layer 234c is laminated on both surfaces thereof is coextruded. If manufactured in advance, other operations may be performed in the same manner as described above.

  The laminated tubular body for obtaining the lining material 100e is obtained by inserting a tubular release film 300 in which a reinforcing fiber base material is tubular and folded therein into a tubular structure of the outer layer 230c. be able to.

  The laminated tubular body for obtaining the lining material 100f is obtained by inserting a tubular release film 300 in which the fibrous base material 210 ′ is tubular and folded therein into the tubular structure of the outer layer 230c. Can be obtained.

[3. Rehabilitation method of fire extinguishing pipe in tunnel]
Hereinafter, with reference to FIG. 17, the lining material 100 of this invention is mentioned and the renewal method of the fire extinguishing piping in a tunnel is demonstrated. The same applies to the case of using other lining materials of the present invention such as the lining materials 100a, 100c, and 100g.

  The existing pipe 900 to be constructed by the lining material 100 is an in-tunnel digestion pipe. The existing pipe 900 (fire extinguishing pipe in the tunnel) is provided in a lower part of a passage such as a supervisor passage provided outside the roadway through which the vehicle or the like passes. The existing pipe 900 is buried in earth and sand such as river sand, and the upper part (passage part) is covered with concrete. The existing pipe 900 is exposed in hand holes arranged at a predetermined interval in the longitudinal direction in the tunnel.

In the existing pipe 900, the inner surface of the metal pipe 910 is covered with a mortar lining 920. When the deterioration of the metal pipe 910 and / or the deterioration of the mortar lining 920 or water leakage is detected by nondestructive inspection in the digestion pipe in the tunnel, the inner peripheral surface of the existing pipe 900 is covered with the lining material of the present invention. It is possible to perform construction. By using the tubular lining material 100 as a reinforcing fiber base impregnated with a curable resin composition, the rehabilitation pipe 800 after rehabilitation has good rust prevention properties and good quality that can withstand the internal water pressure of fire-fighting water. Stability can be given.

  The construction method using the lining material 100 includes an introduction process and a curing process. Further, prior to the introduction process, the inside of the existing pipe 900 may be cleaned, and the status inside the existing pipe 900 may be confirmed by an in-pipe camera.

  In the introduction process, the lining material 100 is introduced into the existing pipe 900. The lining material 100 may be introduced by a pulling method or a reversing method.

  In the pull-in method, after the lead rope is drawn into the existing pipe 900 in advance as shown in FIG. 17A, the lining material 100 is put into the existing pipe 900 using a winch as shown in FIG. You can pull in. At this time, the slip sheet 700 (see FIG. 3) is also drawn into the existing pipe 900, whereby the pulling load of the lining material 100 can be reduced and the lining material 100 can be protected from the friction during the pulling.

  In the case of the reversal method, a reversing machine or the like is used to enclose a fluid in the lining material 100 (in which the illustrated lining material 100 is reversed inside and outside), and the existing pipe while reversing the lining material 100 by fluid pressure. Introduce into 900.

  In the curing step, the lining material 100 is cured while being pressed against the inner wall of the existing pipe 900. Specifically, as shown in FIG. 17 (c), first, both ends of the lining material 100 are closed with pipe end plugs, and compressed gas or high pressure is passed from one of the pipe end plugs through a vent pipe or liquid pipe. The diameter of the lining material 100 is expanded by feeding the liquid into the lining material 100 and pressurizing it. Curing is performed in a pressurized state, that is, in a state where the lining material 100 is pressed against the inner wall of the existing pipe 900.

If the curable resin composition in the lining material 100 is of a thermosetting type, it is cured by feeding a heat medium such as warm water or steam into the lining material 100 at high pressure via a ventilation pipe or a liquid passage pipe. be able to. After thermosetting, as shown in FIG. 17D, the rehabilitation pipe 800 is cooled while maintaining the pressed state.
If the curable resin composition in the lining material 100 is of the active energy ray curable type, it can be cured by irradiating active energy rays such as ultraviolet rays while maintaining the pressed state. As a result, the rehabilitation pipe 800 can be formed from the lining material 100 in the existing pipe 900.

  After the curing step, as shown in FIG. 17 (e), as a post treatment, the tube end of the rehabilitated tube 800 may be cut, and the cut tube end may be subjected to a water stop treatment. The pipe reinforcement structure after rehabilitation obtained in this way is excellent in fire resistance, strength, resistance to internal pressure, water resistance and rust prevention, in combination with the existing pipe 900.

  Here, FIG. 18 and FIG. 19 show a method for explaining a method of rehabilitating a fire extinguishing pipe in a tunnel using a lining material 100b in which a tubular release film 300 is disposed.

  The lining material 100b is introduced into the existing pipe 900 in the same manner as described above, and then both ends of the tubular release film 300 of the lining material 100b are closed with pipe end plugs. The tubular release film 300 is pressurized by sending compressed gas or high-pressure liquid into the tubular release film 300 through a pipe and pressurizing it. As a result, the tubular release film 300 is expanded in diameter as shown in FIG. As the pressurization is further continued, the area where the tubular release film 300 contacts the inner peripheral surface 221b of the lining material 100b increases, and the diameter of the lining material 100b is also increased. As a result, the lining material 100b is pressed against the inner wall of the existing pipe 900, and the tubular release film 300 is in close contact with the entire inner peripheral surface 221b. Curing is performed in such a pressed state.

  When the curing step is completed, as shown in FIG. 19, the rehabilitation tube 800b is obtained in a state where the tubular release film 300 is in close contact with the inner periphery thereof. After the curing step, as a post-treatment, the tubular release film 300 may be peeled from the rehabilitated tube 800b, the tube end of the rehabilitated tube 800b may be cut, and the cut tube end may be water-stopped.

  In addition, the same lining material 100d, 100e, 100f can also be constructed similarly to the lining material 100b in that the tubular release film 300 is disposed inside.

[Example 1, Example 2, Example 3]
In Examples 1 to 3, the lining material 100e of FIG. 9 was created.

<1. Method for preparing curable resin composition>
1.5 parts by weight of a curing agent (65% aqueous solution of paratoluenesulfonic acid) is added to 100 parts by weight of a furan resin resin (furfuryl alcohol and formaldehyde cocondensate, viscosity 2000 mPa · s, moisture content 7.0% by weight). After the addition, the mixture was stirred at 1000 rpm for 10 minutes using a homodisper to prepare a curable resin composition.

<2. Method for forming tubular fiber substrate>
One end of the reinforcing fiber substrate (non-crimp fabric processed glass fiber, thickness 1.0 mm, circumferential direction 850 g / m ² , axial direction 470 g / m ² ) is overlapped with the other end. Tubular fiber base materials (thickness: 1.0 mm, outer peripheral length: D ₀ ) were obtained by joining the ends to each other at the wrapped portions.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
After folding the tubular release film (PE / PA / PE: 40 μm / 40 μm / 40 μm, circumference: the same as the inner circumference of the tubular fiber substrate obtained in the above item 2) to 1/4 width, It arrange | positions inside the said tubular fiber base material.
Further, the tubular fiber base material in which the tubular release film is disposed is passed through the outer layer 230c (PE / PA / PE: 40 μm / 40 μm / 40 μm, circumference: Do), and an unimpregnated lining material (lamination) Tubular body) was obtained.

<4. Method for forming impregnated lining material>
The inner surface from one tube end of the laminated tubular body obtained in the item 3 is depressurized with a vacuum pump, and the curable property obtained in the item 1 is applied to the fiber substrate of the laminated tubular body from the opposite tube end. The resin composition was impregnated with an impregnation roll. Thus, an impregnated lining material 100e was obtained.

<5. Construction method>
The obtained lining material 100e was drawn and inserted into the buried pipe with a ground winch (see FIG. 17B). Subsequently, a tube end plug is attached to the inside of the tubular release film 300 at the end of the lining material 100e, and the diameter of the tubular release film 300 is expanded with compressed air (see FIG. 17 (c)). The lining material 100e was pressed. In that state, the curable resin composition was heated and cured at 90 ° C. by introducing steam into the tubular release film 300 (see FIG. 17D). After curing, the tubular release film 300 was peeled off to obtain a rehabilitated tube.

In Example 1, the inner diameter (D ₀ ) was 146 mm, in Example 2, D ₀ was 197 mm, and in Example 3, D ₀ was 246 mm.

[Example 4, Example 5, Example 6]
In Example 4 to Example 6, the lining material 100e of FIG. 9 was created.

<1. Method for preparing curable resin composition>
A curable resin composition is prepared by adding 25 parts by weight of an aliphatic polyamine-based curing agent (made by DIC) as a curing agent to 100 parts by weight of a bisphenol F-type epoxy resin (made by DIC) and stirring at 1000 rpm for 10 minutes with a stirrer. did.

<2. Method for forming tubular fiber substrate>
A tubular fiber substrate was obtained in the same manner as in Examples 1 to 3.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100e was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
The lining material 100e was constructed in the same manner as in Examples 1 to 3.
In Example 4, the inner diameter (D ₀ ) was 146 mm, in Example 5, D ₀ was 197 mm, and in Example 6, D ₀ was 246 mm.

[Example 7, Example 8, Example 9]
In Example 7 to Example 9, the lining material 100e of FIG. 9 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Tubular as in Examples 1 to 3 except that a reinforcing fiber substrate (non-crimp fabric processed glass fiber, thickness 5.0 mm, circumferential direction 4250 g / m ² , axial direction 2350 g / m ² ) was used. A fiber substrate was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100e was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
The lining material 100e was constructed in the same manner as in Examples 1 to 3.
In Example 7, the inner diameter (D ₀ ) was 146 mm, in Example 8, D ₀ was 197 mm, and in Example 9, D ₀ was 246 mm.

[Example 10, Example 11, Example 12]
In Example 10 to Example 12, the lining material 100f of FIG. 10 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Resin-absorbing substrate (polyester nonwoven fabric, thickness 0.25 mm) on both sides of a reinforcing fiber substrate (non-crimp fabric processed glass fiber, thickness 1.0 mm, circumferential direction 850 g / m ² , axial direction 470 g / m ² ) weight 60 g / m ²⁾ was one end and the other end overlaps the integral laminated fiber base into a sheet by needle punching, tether together respective ends in portions obtained by the overlap Thus, a tubular fiber base material (thickness 1.5 mm, outer peripheral length: D ₀ ) formed into a tubular shape was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100f was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
The lining material 100f was constructed in the same manner as in Examples 1 to 3.
In Example 10, the inner diameter (D ₀ ) was 146 mm, in Example 11, D ₀ was 197 mm, and in Example 12, D ₀ was 246 mm.

[Example 13, Example 14, Example 15]
In Example 13 to Example 15, the lining material 100f of FIG. 10 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Example 10 to Example 12 except that a reinforcing fiber substrate (non-crimp fabric processed glass fiber, thickness 6.0 mm, circumferential direction 5100 g / m ² , axial direction 2820 g / m ² ) was used.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100f was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
The lining material 100f was constructed in the same manner as in Examples 1 to 3.
In Example 13, the inner diameter (D ₀ ) was 146 mm, in Example 14, D ₀ was 197 mm, and in Example 15, D ₀ was 246 mm.

[Example 16, Example 17, Example 18]
In Example 16 to Example 18, the lining material 100g of FIG. 11 was prepared.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Tubular fiber substrates were obtained in the same manner as in Examples 10-12.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Polyester fiber annular woven fabric (thickness: 2.0 mm, coating thickness: 0.8 mm, twisted yarn fineness: 3000 dTEX) whose outer surface is coated with polypropylene is inverted with compressed air, and a polypropylene resin layer is formed on a tubular fiber substrate. A water-stopping layer core tube in which 225a was laminated was obtained. The water-stopping layer core tube is drawn into the tubular fiber base material obtained in the above item 2, and then placed in the outer layer 230 (PE / PA / PE: 40 μm / 40 μm / 40 μm, circumference: Do). The tubular fiber base material into which the water stop layer core tube was drawn was passed through to obtain an unimpregnated lining material (laminated tubular body).

<4. Method for forming impregnated lining material>
100 g of the lining material impregnated in the same manner as in Examples 1 to 3 was obtained.

<5. Construction method>
100 g of the obtained lining material was drawn into the buried pipe with a ground winch and inserted (see FIG. 17B). Subsequently, a pipe end plug was attached to the end of the lining material 100g, the diameter of the lining material 100g was expanded with compressed air (see FIG. 17C), and the lining material 100g was pressed against the inner wall of the existing pipe. In that state, the curable resin composition was heated at 90 ° C. to cure by introducing steam into the lining material 100 g (see FIG. 17D).
In Example 16, the inner diameter (D ₀ ) was 146 mm, in Example 17, D ₀ was 197 mm, and in Example 18, D ₀ was 246 mm.

[Example 19, Example 20, Example 21]
In Example 19 to Example 21, the lining material 100g of FIG. 11 was prepared.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Tubular fiber substrates were obtained in the same manner as in Examples 13-15.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 16-18.

<4. Method for forming impregnated lining material>
100 g of the lining material impregnated in the same manner as in Examples 1 to 3 was obtained.

<5. Construction method>
100 g of lining material was applied in the same manner as in Examples 16-18.
In Example 19, the inner diameter (D ₀ ) was 146 mm, in Example 20, D ₀ was 197 mm, and in Example 21, D ₀ was 246 mm.

[Comparative Example 1]
In Comparative Example 1, the lining material 100e of FIG. 9 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Example 1 to Example 3 except that a reinforcing fiber base material (non-crimp fabric processed glass fiber, thickness 0.2 mm, circumferential direction 130 g / m ² , axial direction 130 g / m ² ) was used. A tubular fiber substrate was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100e was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
In the same manner as in Example 1 to Example 3, the lining material 100e was applied to a tunnel fire extinguisher having an inner diameter (D ₀ ) of 146 mm.

[Comparative Example 2]
In Comparative Example 2, the lining material 100e of FIG. 9 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
Example 1 to Example 3 except that a reinforcing fiber substrate (non-crimp fabric processed glass fiber, thickness 0.4 mm, circumferential direction 260 g / m ² , axial direction 260 g / m ² ) was used. A tubular fiber substrate was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100e was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
In the same manner as in Examples 1 to 3, a lining material 100e was applied to a tunnel fire extinguisher having an inner diameter (D ₀ ) of 246 mm.

[Comparative Example 3]
In Comparative Example 3, the lining material 100f of FIG. 10 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
It is tubular like Example 10-12 except having used the reinforced fiber base material (The glass fiber of a non-crimp fabric process, thickness 9.0mm, circumferential direction 7650g / m < ² >, axial direction 4230g / m < ² >). A fiber substrate was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100f was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
In the same manner as in Examples 1 to 3, a lining material 100f was applied to a tunnel fire extinguisher having an inner diameter (D ₀ ) of 146 mm.

[Comparative Example 4]
In Comparative Example 4, the lining material 100f of FIG. 10 was created.

<1. Method for preparing curable resin composition>
Curable resin compositions were prepared in the same manner as in Examples 4 to 6.

<2. Method for forming tubular fiber substrate>
It is tubular like Example 10-12 except having used the reinforced fiber base material (The glass fiber of a non-crimp fabric process, thickness 15.0mm, circumferential direction 12750g / m < ² >, axial direction 7050g / m < ² >). A fiber substrate was obtained.

<3. Method of forming unimpregnated lining material (laminated tubular body)>
Unimpregnated lining material (laminated tubular body) was obtained in the same manner as in Examples 1 to 3.

<4. Method for forming impregnated lining material>
An impregnated lining material 100f was obtained in the same manner as in Examples 1 to 3.

<5. Construction method>
In the same manner as in Examples 1 to 3, a lining material 100f was applied to a tunnel fire extinguisher having an inner diameter (D ₀ ) of 246 mm.

[Various measurements]
<1. Measurement of tensile strength in the circumferential direction of the reinforcing layer after curing>
A flat resin impregnated body was prepared using the curable resin composition used for each lining material and the fiber base material of the reinforcing layer, and then cured to obtain a cured flat plate.
The cured plate was pulled in the circumferential direction, and the tensile strength was measured according to JIS K7164.

<2. Measurement of flow coefficient>
Pressure gauges were installed upstream and downstream of the rehabilitation pipe, and the distance between the pressure gauges was the effective length of the rehabilitation pipe. Water was passed through a rehabilitation pipe having an effective length of 4.0 m with a pressure pump, and the differential pressure between the upstream pressure gauge and the downstream pressure gauge at a constant flow rate was measured. The flow rate condition was 7 m ³ / min.

The flow coefficient was calculated using the Hazen Williams equation.
h = 10.666 ・ C ₁ ^-1.85・ D ^-4.87・ Q ^1.85・ L
h: Piping friction loss head (m)
C ₁ : Flow coefficient D: Inner diameter of pipe (m)
Q: Flow rate (m ³ / sec)
L: Pipe length (m)

<3. Measurement of flow ratio before and after construction>
Using a Coriolis type flow meter, the flow rate before construction and the flow rate after construction were measured.

<4. Measurement of water pressure in fracture>
After constructing the rehabilitation pipe in the tunnel fire extinguishing pipe, the tunnel fire extinguishing pipe was removed and only the rehabilitation pipe was taken out. A flange was attached to both ends of the rehabilitated pipe taken out, a closing lid was attached, the interior was filled with water, and pressure was applied with a pressure pump. The pressure at breakage of the rehabilitation pipe was obtained as the water pressure inside the breakage.

[Comprehensive evaluation]
In the comprehensive evaluation (“Evaluation” in the table), the case where the flow rate ratio is 100% or more and the fracture internal water pressure is 2 MPa or more is “◎”, and the case where the flow rate ratio is 80% or more and the fracture internal water pressure is 2 MPa or more. The case where the flow rate ratio was less than 80% or the fracture internal water pressure was less than 2 MPa was evaluated as “x”.

  Preferred embodiments of the present invention are as described above, but the present invention is not limited to them, and various other embodiments are possible without departing from the spirit of the present invention.

[Correspondence Relationship Between Each Part in Embodiment and Each Component in Claim]
In this specification, the lining materials 100, 100a, 100b, 100c, 100d, 100e, 100f, and 100g correspond to the “tubular lining material” in the claims, and the reinforcing layers 210 and 210e correspond to the “reinforcing layer”. The reinforced resin layer is a layer in which a “reinforced fiber substrate” is impregnated with a curable resin composition, and the resin absorption layer 212 is a layer in which a “resin absorbent substrate” is impregnated with a curable resin composition, and is smooth The surfaces 221, 221 a, 221 b, and 221 d correspond to the “inner peripheral surface”, the rehabilitation pipe 800 corresponds to the “rehabilitation pipe”, the existing pipe 900 corresponds to “the existing metal fire extinguishing pipe in the tunnel”, The thickness t corresponds to “layer thickness”, and the inner diameter D ₀ corresponds to “inner diameter”.

100, 100a, 100b, 100c, 100d, 100e, 100f, 100g Lining material (tubular lining material)
210, 210e Reinforcement layer 211 Fiber reinforced resin layer (a layer in which a curable resin composition is impregnated into a reinforced fiber base material)
212 Resin absorption layer (layer in which resin-absorbing base material is impregnated with curable resin composition)
221, 221a, 221b, 221d Smooth surface (inner peripheral surface)
800 Rehabilitation tube (cured tube of tubular lining material)
900 Existing pipe (existing fire extinguishing pipe in tunnel, fire extinguishing pipe in tunnel)
t Total thickness of tubular lining material D ₀ Inner diameter of fire extinguishing pipe in tunnel

Claims (4)

A tubular lining material for forming a rehabilitation pipe inside an existing fire extinguishing pipe in a tunnel,
A reinforcing layer comprising a reinforcing fiber substrate impregnated with a curable resin composition,
The inner diameter D ₀ (mm) of the fire extinguishing pipe in the tunnel and the total thickness t (mm) of the tubular lining material are expressed by the following formulas (I) and (II):
0.880 ≦ (D ₀ −2t) / D _o ≦ 0.996 (I)
100 <D ₀ <300 (II)
The lining material for rehabilitating tunnel fire extinguishing pipes that meets the requirements. The flow rate count C ₁ of the inner circumferential surface of the rehabilitating pipe is 130 greater than the tunnel in fire fighting pipe rehabilitating lining material according to claim 1.   The lining material for firefighting pipe rehabilitation in a tunnel according to claim 1, comprising a waterstop layer laminated on the reinforcing layer, and a surface of the waterstop layer constituting an inner peripheral surface of the rehabilitation pipe.   The fire extinguishing pipe in a tunnel according to any one of claims 1 to 3, wherein the total thickness t (mm) is 8.5 mm or less, and the tensile strength in the circumferential direction of the renovated pipe is 250 MPa or more. Rehabilitation lining material.