Lining pipe

Abstract

To provide a lining pipe having a high mechanical property.SOLUTION: There is provided a lining pipe 10 for repairing a branch pipe 71, comprising: a cylindrical resin-cured layer 31H that is formed by curing an uncured resin of a cylindrical support body 31; a cylindrical outer reinforcing layer 22H that is disposed between the branch pipe 71 and the resin-cured layer 31H, and is made of a material different from that of the support body 31; a cylindrical impermeable film 34 that is disposed on an innermost side of the lining pipe 10 and has airtightness; and a cylindrical inner reinforcing layer 32H that is disposed between the impermeable film 34 and the resin cured layer 31H, and made of a material different from that of the support body 31, wherein the inner reinforcing layer 32H is made of a material having a higher strength than the material of the outer reinforcing layer 22H.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present invention relates to a lining pipe.

Background Art

[0002] There are pipelines buried underground, such as underground sewer pipelines through which sewage flows and underground cable pipelines that house power cables. This pipeline includes a main pipe, branch pipes (attachment pipes) branched from the main pipe, and the like. Due to earthquakes, aging, etc., the pipeline may crack, the joint part may separate to form a gap, or the joint part may shift to form a step. Also, even without aging, when a new pipeline is laid, gaps or steps may occur in the joint part.

[0003] When repairing a pipeline with such cracks, gaps, or steps, it is preferable to perform the repair without excavation in terms of reducing repair costs and minimizing traffic disruptions. Therefore, a pipeline repair technique has been proposed in which a lining material impregnated with uncured resin is reversely inserted into the pipeline and the resin is cured while being pressed against the inner peripheral surface of the pipeline, thereby lining the branch pipe without excavation (see, for example, Patent Document 1).

[0004] In the pipeline repair described in this Patent Document 1, when lining a branch pipe that connects a box formed on the ground surface part to the main pipe, a cylindrical lining material having a carrier that supports uncured resin is reversely inserted into the branch pipe from the inlet on the box side by compressed air. Then, while pressing the lining material against the inner peripheral surface of the pipeline, the resin impregnated in the lining material is cured to form a lining pipe.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In recent years, in order to make a lining pipe formed by repairing a pipeline using a lining material function as a self-supporting pipe, high mechanical properties have been required for the lining pipe.

[0007] In view of the above circumstances, an object of the present invention is to provide a lining pipe having high mechanical properties.

Means for Solving the Problems

[0008] The lining pipe of the present invention for solving the above object is a lining pipe for repairing a pipeline, a cylindrical resin cured layer formed by curing the resin of a cylindrical carrier carrying uncured resin, a cylindrical outer reinforcing layer disposed between the pipeline and the resin cured layer and made of a material different from that of the carrier, a cylindrical airtight layer disposed on the innermost side of this lining pipe and having airtightness, and a cylindrical inner reinforcing layer disposed between the airtight layer and the resin cured layer and made of a material different from that of the carrier. The inner reinforcing layer is characterized in that it is made of a material having higher strength than that of the outer reinforcing layer.

Effects of the Invention

[0009] According to the present invention, a lining pipe having high mechanical properties can be provided.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of this embodiment, an example of lining a branch pipe in a sewer pipe with a lining material is used.

[0012] FIG. 1 is a perspective view showing a schematic configuration of a lining material corresponding to an embodiment of the present invention. In the drawings shown below, the thicknesses of the respective elements constituting the lining material 1 are exaggeratedly shown.

[0013] As shown in FIG. 1, the lining material 1 of this embodiment is composed of a cylindrical outer lining member 2 and a cylindrical inner lining member 3. Note that the term "cylindrical" as used in this embodiment is a concept that includes not only a circular cylinder but also a flattened sleeve-like shape. FIG. 1 shows the outer lining member 2 before inversion insertion and the inner lining member 3 before inversion insertion. The outer lining member 2 and the inner lining member 3 are elongated members extending in the central axis direction. The outer lining member 2 is arranged in the pipeline by inversion insertion, and the inner lining member 3 is arranged inside the inverted outer lining member 2 by inversion insertion.

[0014] The outer lining member 2 has a cylindrical shape including an impermeable tube 21 and a first reinforcing body 22. This outer lining member 2 corresponds to an example of a first cylindrical body. The outer lining member 2 is a cylindrical body having an outer peripheral surface with a circumference substantially the same as the circumference of the inner peripheral surface of the pipeline to be lined. The impermeable tube 21 has a seamless cylindrical shape. This impermeable tube 21 is made of an impermeable material that does not permeate gas or liquid. The impermeable tube 21 of this embodiment has a laminated structure in which nylon is sandwiched between polyethylene. Note that instead of polyethylene, other polyolefins such as polypropylene may be used, and furthermore, a single-layer structure instead of a laminated structure may also be used.

[0015] The first reinforcing member 22 is also seamless and tubular, similar to the impermeable tube 21. In the state before the reverse insertion shown in FIG. 1, the first reinforcing member 22 is disposed outside the impermeable tube 21. That is, the impermeable tube 21 is inserted inside the first reinforcing member 22. The lengths of the first reinforcing member 22 and the impermeable tube 21 in the extending direction are the same. The first reinforcing member 22 is made of a material different from that of the carrier 31 described later and has higher strength than the carrier 31. Note that the strength in the present embodiment refers to tensile strength. The first reinforcing member 22 of the present embodiment is composed of a cloth woven from fibers made of a mixed material of polyester and cotton. As the first reinforcing member 22, a woven fabric containing at least one of glass fiber, polyester fiber, aramid fiber, carbon fiber, stainless steel fiber or silica fiber or a sheet material using a thread made of these fibers may be used. Further, as the first reinforcing member 22, a non-woven fabric containing at least one of glass fiber, aramid fiber, carbon fiber, stainless steel fiber or silica fiber may be used. The first reinforcing member 22 is separate from the impermeable tube 21, and there is also a portion where a slight first gap 2a is formed between the first reinforcing member 22 and the impermeable tube 21. However, the first reinforcing member 22 and the impermeable tube 21 may be integrated by attaching them using an adhesive or the like. In FIG. 1, in the enlarged view in which the end face of the outer lining member 2 is surrounded by a circle, the first gap 2a is exaggeratedly shown, but actually, there are many portions where the first reinforcing member 22 and the impermeable tube 21 are in contact. The thickness of the first reinforcing member 22 is preferably 5% or more and 50% or less, more preferably 10% or more and 40% or less, based on the total thickness of the lining material 1. If the thickness of the first reinforcing member 22 is too thick, it becomes difficult to penetrate the uncured resin, which will be described in detail later, throughout the first reinforcing member 22, and the mechanical properties of the lining tube 10 (see FIG. 12) formed by the lining material 1 may deteriorate. On the other hand, if the thickness of the first reinforcing member 22 is too thin, the effect of enhancing the mechanical properties by the layer formed by the first reinforcing member 22 cannot be sufficiently obtained in the lining tube 10.

[0016] The inner lining member 3 is cylindrical and includes a carrier 31, a second reinforcing body 32, a reinforcing body holder 33, and an impermeable film 34. This inner lining member 3 corresponds to an example of a second cylindrical body. The inner lining member 3 is a cylindrical body having an outer peripheral surface with a circumference that is the same as or slightly shorter than the circumference of the inner peripheral surface of the outer lining member 2. The carrier 31, the second reinforcing body 32, and the reinforcing body holder 33 are integrated by being sewn together at various locations in the plane direction. Note that the impermeable film 34 is coated on the outside of the reinforcing body holder 33 without being sewn in order to maintain airtightness, and thus is integrated with the reinforcing body holder 33. The lengths of the carrier 31, the second reinforcing body 32, the reinforcing body holder 33, and the impermeable film 34 in the extending direction are the same.

[0017] Before the reverse insertion, the carrier 31 is a seamless cylinder disposed at the innermost side of the inner lining member 3. This carrier 31 carries uncured resin. The thickness of the carrier 31 is the thickest among those constituting the lining material. The thickness of the carrier 31 in this embodiment is 3 to 4 mm. The carrier 31 is made of a polyester nonwoven fabric. Note that the carrier 31 is not limited to polyester and may be a nonwoven fabric made of a fibrous material such as nylon, acrylic, or vinylon.

[0018] The second reinforcing member 32 has a seamless tubular shape that is arranged inside next to the carrier 31 before the reverse insertion. The second reinforcing member 32 is made of a material different from that of the carrier 31 and has a higher strength than the carrier 31. Also, the second reinforcing member 32 preferably has a higher strength than the first reinforcing member 22. By doing so, compared with the case where the strength of the second reinforcing member 32 is lower than that of the first reinforcing member 22, the long-term bending strength and the short-term bending strength of a lining pipe 10 (see FIG. 12) described later, which is formed using the lining material 1, can be increased more. The second reinforcing member 32 of the present embodiment is a sheet material having a thickness of 1 to 2 mm containing glass fibers. As the second reinforcing member 32, a sheet material using a woven fabric containing at least one of glass fibers, polyester fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers or a thread made of these fibers may be used. Also, as the second reinforcing member 32, a non-woven fabric containing at least one of glass fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers may be used.

[0019] The reinforcing member holder 33 has a seamless tubular shape that is arranged outside the second reinforcing member 32 before the reverse insertion. This reinforcing member holder 33 is for holding the second reinforcing member 32 by sandwiching the second reinforcing member 32 between it and the carrier 31. The reinforcing member holder 33 is made of a polyester non-woven fabric similar to the carrier 31. Note that the reinforcing member holder 33 may be a non-woven fabric made of a fibrous material such as nylon, acrylic, or vinylon.

[0020] The impermeable film 34 is an impermeable film made of polyurethane that has a higher extensibility in the radial direction than the impermeable tube 21. The impermeable film 34 covers the entire outermost surface of the inner lining member 3 before the reverse insertion. The impermeable film 34 may be formed of other materials such as polyethylene or nylon as long as it is made of a material having airtightness and watertightness. Also, the impermeable film 34 is preferably formed of a material having a high extensibility in the plane direction.

[0021] Next, a lining method using the above-described lining material 1 will be described. FIG. 2 is a flowchart showing the flow of the lining method for repairing a branch pipe by backlining, and FIG. 3 is a diagram showing a pipeline repair device installed at a construction site.

[0022] In the description here, an example in which a branch pipe 71 connecting the main pipe 72 and the box 73 is taken as the repair target is used. The length of the branch pipe 71 in the extending direction, that is, from the box-side opening 71a located on the box 73 side to the main-pipe-side opening 71b located on the main pipe 72 side, is about 1 m to 5 m, and may exceed 5 m.

[0023] As shown in FIG. 2, first, an apparatus installation step of installing the pipeline repair device 9 shown in FIG. 3 around the pipeline to be repaired is performed (step S1). Before performing the apparatus installation step, it is desirable to remove deposits and the like inside the branch pipe 71 using a high-pressure cleaning vehicle and to confirm the situation inside the branch pipe 71 and the connection state between the branch pipe 71 and the main pipe 72 using a TV camera or the like.

[0024] In FIG. 3, the pipeline repair device 9 is installed near the box 73 to which the branch pipe 71 to be repaired is connected. The pipeline repair device 9 shown in FIG. 3 has a storage portion 5 in which the outer lining member 2 and the inner lining member 3 before reverse insertion are stored at different timings, and a mouth portion 6 connected to the storage portion 5. Further, FIG. 3 also shows a compressed air supply means 4 connected to the storage portion 5 of the pipeline repair device 9.

[0025] The storage portion 5 has a winding member 51 that winds up the outer lining member 2 and the inner lining member 3, and a pressure regulator 52 to which the compressed air supply means 4 is connected and that receives compressed air. The storage portion 5 of the present embodiment stores the outer lining member 2 or the inner lining member 3 in a state of being wound up by rotating the handle 511 of the winding member 51. Note that the storage states of the outer lining member 2 and the inner lining member 3 in the storage portion 5 are not limited to this, and for example, a storage state in which the outer lining member 2 or the inner lining member 3 is folded and stored may be used.

[0026] The mouth part 6 has an inverted mouth 61 that opens to the left in FIG. 3. The inverted mouth 61 is an opening to which one end of the lining material stored in the storage part 5 is attached in a state where it is folded back to the outside, and the folded part of the lining material is fixed by an end fixture 611 such as a band or a belt.

[0027] The compressed air supply means 4 has a compressor 41 and a hose 42. The hose 42 connects the pressure regulator 52 in the storage part 5 and the compressor 41. The compressed air produced by the compressor 41 flows through the hose 42 and is supplied into the storage part 5 from the pressure regulator 52.

[0028] FIG. 4 is a diagram for explaining the outer lining member storage process and the outer lining member attachment process shown in FIG. 2.

[0029] After the device installation process is completed, the outer lining member storage process is carried out (step S2). In the outer lining member storage process, first, as shown in FIG. 4(a), the end of the impermeable tube 21 of the outer lining member 2 shown in FIG. 1 is blocked with a gum tape T, and the end of the first reinforcing body 22 is attached to the end of the impermeable tube 21 with a gum tape T. Since this end becomes the tip when the inversion of the outer lining member 2 ends, hereinafter, this end is referred to as the outer member tip 2b, and the opposite end is referred to as the outer member rear end 2c. Note that tapes other than the gum tape T may be used for blocking and attachment, or the outer member tip 2b portions of both the impermeable tube 21 and the first reinforcing body 22 may be collectively and lightly tied with a string. The outer lining member 2 is cut to an appropriate length at the construction site in consideration of the length of the branch pipe 71, the depth and size of the box 73, etc. shown in FIG. 3. Then, as shown in FIG. 4(b), the outer member tip 2b tied with the gum tape T is wound around the winding member 51 of the storage part 5, and by rotating the handle 511, the outer lining member 2 is wound around the winding member 51. Eventually, the outer lining member 2 is wound around the winding member 51 leaving the outer member rear end 2c on the side opposite to the side wound around the winding member 51 and is stored in the storage part 5.

[0030] After that, as shown in FIG. 4(c), the rear end 2c of the outer member is folded outward from the reversing port 61, and the folded rear end 2c of the outer member is attached to the port 6 by the end fixture 611 (step S3).

[0031] Subsequently, preparations are made to perform the outer lining member reversing and inserting process (step S4) shown in FIG. 2. This outer lining member reversing and inserting process corresponds to an example of the first reversing and inserting process.

[0032] FIG. 5 is a diagram showing a state in which the outer lining member is reversed from the reversing port to a length that can be inserted into the branch pipe.

[0033] When the compressor 41 of the compressed air supply means 4 is operated and compressed air is supplied from the pressure regulator 52 into the storage part 5 as shown by the arc-shaped arrow in FIG. 5, the outer lining member 2 with the rear end 2c of the outer member attached to the reversing port 61 as shown in FIG. 5 is sent out while reversing from the reversing port 61 by the pressure of the supplied compressed air. Here, when the length of the outer lining member 2 sent out while reversing from the reversing port 61 reaches a level where it can be slightly inserted into the branch pipe 71 from the tub side opening 71a, the pressure regulator 52 is operated to temporarily stop the supply of compressed air. Then, by inserting the end of the outer lining member 2 that has been reversed partway on the sent-out side into the branch pipe 71 from the tub side opening 71a, the preparations for performing the outer lining member reversing and inserting process (step S4) are completed.

[0034] FIG. 6 is a diagram showing the state after starting the outer lining member reversing and inserting process (step S4) shown in FIG. 2, FIG. 7 is a diagram showing the state where the tip of the outer lining member has reached near the edge of the main pipe side opening, and FIG. 8 is a diagram showing the state where the outer lining member reversing and inserting process (step S4) is completed.

[0035] When the preparation for the process of inverting and inserting the outer lining member (step S4) is complete, the pressure regulator 52 is operated to resume the supply of compressed air into the storage unit 5, and the process of inverting and inserting the outer lining member (step S4) is started. When the supply of compressed air into the storage unit 5 starts again, as shown in FIG. 6, the outer lining member 2 inserted into the branch pipe 71 extends toward the main pipe 72 while inverting due to the pressure of the supplied compressed air. Eventually, as shown in FIG. 7, the tip 2b of the outer member of the outer lining member 2 reaches near the edge of the main pipe side opening 71b and protrudes into the main pipe 72 from the main pipe side opening 71b. Here, when the pressure regulator 52 is operated to increase the supply pressure of the compressed air, as shown in FIG. 8, the gum tape T that had tied the tip 2b of the outer member of the outer lining member 2 comes off, and the tip 2b of the outer member of the outer lining member 2 opens. Note that it can be determined that the tip 2b of the outer member has opened because the pressure of the air supplied from the compressed air supply means 4 has decreased. Thereafter, the end fixture 611 is removed from the inversion port 61, and the rear end 2c of the outer member of the outer lining member 2 attached to the mouth portion 6 is removed from the mouth portion 6. Thus, the process of inverting and inserting the outer lining member (step S4) is completed.

[0036] Subsequently, the inner lining member impregnation process shown in FIG. 2 is carried out (step S5). In the inner lining member impregnation process, at the construction site, the inner lining member 3 is impregnated with uncured resin. The resin is poured into the inner lining member 3 from the side of the carrier 31 that is the innermost in the inner lining member 3 before the reverse insertion, so that the inner lining member 3 is impregnated with the resin. The poured resin soaks into the carrier 31, the second reinforcing body 32, and the reinforcing body holder 33 in this order, and is prevented from leaking outside the inner lining member 3 by the impermeable film 34. The resin to be impregnated is not particularly limited, but in this embodiment, a resin mainly composed of a vinyl ester resin, mixed with a filler and various additives, etc. is adopted. Instead of the vinyl ester resin, a thermosetting resin such as an unsaturated polyester resin or a urethane acrylate resin may be used. Also, the resin impregnated in this embodiment cures at room temperature, but it may be a resin that cures at room temperature but cures faster by heating, or a thermosetting resin that does not cure at room temperature but cures by heating, or a photocurable resin that cures by irradiating light. In short, any curable resin may be used. When using a thermosetting resin, a heat supply device is also prepared as the pipeline repair device 9, and when using a photocurable resin, a light irradiation device is also prepared as the pipeline repair device 9. Note that it is preferable to cut the inner lining member 3 to the same length as the outer lining member 2 at the construction site before impregnation.

[0037] FIG. 9 is a diagram for explaining the inner lining member storage process and the lining material attachment process shown in FIG. 2.

[0038] Once the inner lining member impregnation process is completed, the inner lining member storage process is carried out (step S6). In the inner lining member storage process, first, the inner lining member 3 impregnated with uncured resin and the pressing cylindrical body 8 are prepared in the lining member impregnation process. The pressing cylindrical body 8 is obtained by coating a polyester fiber woven fabric with soft vinyl chloride, and during construction, it serves to press the outer lining member 2 and the inner lining member 3 from the inside towards the branch pipe, and is recovered after construction. Also, the pressing cylindrical body 8 is slightly longer than the inner lining member 3. In the inner lining member storage process, first, as shown in Fig. 9(a), the tip of the inner lining member 3 impregnated with uncured resin is tied with a string-like body 80 such as a rope passed through the pressing cylindrical body 8. Subsequently, by pulling the string-like body 80, the inner lining member 3 is completely drawn into the pressing cylindrical body 8 from the opening 8e at one end side of the pressing cylindrical body 8. As a result, as shown in Fig. 9(b), the pressing cylindrical body 8 is located on the outside, and the inner lining member 3 is located inside the pressing cylindrical body 8.

[0039] Subsequently, the string-like body 80 that tied the tip of the inner lining member 3 is untied, and this time, as shown in Fig. 9(c), one end of the pressing cylindrical body 8 is tied and closed. The end closed here will become the tip when the inversion of the pressing cylindrical body 8 is completed, and hereinafter, it is referred to as the pressing cylinder tip 8a. Next, one end of the inversion belt 83 is tied to the tied pressing cylinder tip 8a. The other end of the inversion belt 83 is attached to the winding member 51 of the storage unit 5. By rotating the handle 511, the inversion belt 83 is wound around the winding member 51, and eventually, the inner lining member 3 also enters through the inversion port 61 and is wound around the winding member 51 as shown in Fig. 9(d). As a result, the inner lining member 3 is stored in the storage unit 5 together with the pressing cylindrical body 8.

[0040] Next, the lining material attachment process is performed (step S7). In the lining material attachment process, first, the end of the inner lining member 3 on the side opposite to the side wound around the winding member 51 is folded outward from the reversing port 61 together with the end of the pressing cylindrical body 8. Then, the outer member rear end 2c of the removed outer lining member 2 is covered on the folded outside, and the end fixing tool 611 is covered on the outside thereof, thereby attaching the ends of the inner lining member 3, the pressing cylindrical body 8, and the outer lining member 2 to the mouth portion 6. FIG. 9(e) is a cross-sectional view showing an enlarged view of the portion where the ends of the inner lining member 3, the pressing cylindrical body 8, and the outer lining member 2 are attached to the reversing port 61 of the mouth portion 6. As shown in FIG. 9(e), when the ends of the inner lining member 3, the pressing cylindrical body 8, and the outer lining member 2 are attached to the reversing port 61 of the mouth portion 6, the pressing cylindrical body 8 is positioned on the outer periphery of the reversing port 61, the inner lining member 3 is positioned outside thereof, and the outer lining member 2 is positioned further outside thereof.

[0041] Subsequently, the inner lining member reversing and inserting process shown in FIG. 2 is performed (step S8). This inner lining member reversing and inserting process corresponds to an example of the second reversing and inserting process.

[0042] FIG. 10 is a diagram showing the state after starting the inner lining member reversing and inserting process (step S8) shown in FIG. 2, and FIG. 11 is a diagram showing the state after completion of the inner lining member reversing and inserting process (step S8) shown in FIG. 2.

[0043] By operating the pressure regulator 52 and starting the supply of compressed air into the storage unit 5, the process of reversely inserting the inner lining member is started. In this process of reversely inserting the inner lining member, the previously reversely inserted outer lining member 2 guides the reverse insertion of the inner lining member 3 and the pressing cylindrical body 8 into the branch pipe 71. When the supply of compressed air into the storage unit 5 starts, as shown in Fig. 10, due to the pressure of the supplied compressed air, the inner lining member 3 and the pressing cylindrical body 8 are guided by the outer lining member 2 while reversing inside the outer lining member 2 and extend towards the main pipe 72. The outer lining member 2 is in a contracted state before the process of reversely inserting the inner lining member, but as the inner lining member 3 and the pressing cylindrical body 8 reverse and enter its interior, it expands in diameter again and is pressed against the inner peripheral surface of the branch pipe 71 by the inner lining member 3 and the pressing cylindrical body 8. Eventually, as shown in Fig. 11, the tip of the inner lining member 3 reaches near the edge of the main pipe side opening 71b and stays at that position. When the inner lining member 3 is reversely inserted, the second reinforcing body 32 is positioned inside the carrier 31, and the first reinforcing body 22 is positioned outside the carrier 31. The tip 82a of the pressing cylindrical body 8 is closed with one end of the reversing belt 83 tied to it. In the space V surrounded by the inner peripheral surface of the pressing cylindrical body 8 shown in Fig. 11, the reversing belt 83 extending from the tip 82a runs, and this reversing belt 83 is connected to the winding member 51. It should be noted that an appropriate tension can be applied to the inner lining member 3 and the pressing cylindrical body 8 inserted into the branch pipe 71 by the pressure of the compressed air by manually operating the winding member 51 to which the reversing belt 83 is connected. Also, when the inner lining member 3 and the pressing cylindrical body 8 do not advance smoothly, it is preferable to perform a winding operation with the winding member 51. This makes it possible to smoothly reversely insert the inner lining member 3 and the pressing cylindrical body 8 into the branch pipe 71.

[0044] Also, in Fig. 11, as shown by enlarging the portion surrounded by a circle, the lining material 1 (outer lining member 2 and inner lining member 3) inserted into the branch pipe 71 by two inversion insertions is such that the lining material 1 is overlapped on the inner surface of the branch pipe 71, and the pressing cylindrical body 8 is positioned inside the lining material 1. The pressure of the supplied compressed air is applied to this pressing cylindrical body 8, and as shown by the arrow in the enlarged view of Fig. 11, the lining material 1 is pressed against the branch pipe 71 through the pressing cylindrical body 8. At that time, it flows by the pressure contact of the uncured resin impregnated in the inner lining member 3 and also flows into the first reinforcing body 22 of the outer lining member 2 and penetrates the first reinforcing body 22. The pressing of the lining material 1 by this pressing cylindrical body 8 continues until the resin impregnated in the lining material 1 is hardened to a certain extent and the lining material 1 can maintain a cylindrical shape. When the resin is hardened to the extent that the lining material 1 can maintain a cylindrical shape, the inner lining member inversion insertion step (step S8) is completed.

[0045] Next, the pressing cylindrical body recovery step (step S9) shown in Fig. 2 is carried out. In this pressing cylindrical body recovery step, as the simplest method, the inversion belt 83 is pulled manually. Thereby, the pressing cylindrical body 8 is dragged out onto the ground while being peeled off from the lining material 1. Incidentally, the inversion belt 83 may be wound by the winding member 51 by rotating the handle 511 to pull the pressing cylindrical body 8. At that time, air may be supplied into the lining material 1 from the compressed air supply means 4 at a very weak pressure while the inversion belt 83 is wound. Since the lining material 1 at this point has the resin hardened to the extent that its shape can be maintained in a state of being pressed against the branch pipe 71, after the pressing cylindrical body 8 is peeled off, the cylindrical lining material 1 along the branch pipe 71 remains in the branch pipe 71. Hereinafter, the cylindrical lining material 1 remaining in the branch pipe 71 may be referred to as the lining pipe 10.

[0046] Once the pressing cylindrical body 8 is completely removed from the branch pipe 71, the lining material 1 is cut at the tub side opening 71a, and the pressing cylindrical body 82 and the cut lining material 1 are recovered. Then, if necessary, the tub side opening 71a is finished with a pipe end finishing material. Also, a drilling machine is inserted into the main pipe 71, and the part of the lining pipe 10 protruding into the main pipe 71 is cut off at the main pipe side opening 71b, thus completing the pipeline repair. The impregnated resin further cures over time, and eventually the lining pipe 10 comes to function as a self-standing pipe.

[0047] FIG. 12(a) is a cross-sectional view showing the lining pipe, and FIG. 12(b) is an enlarged view of part B in FIG. 12(a). In FIG. 12(a), the thicknesses of the respective elements constituting the lining pipe 10 are exaggeratedly shown. In FIG. 12(b), in the state of the lining material 1 (see FIG. 1) before inversion and insertion, the part that was the outer lining member 2 (see FIG. 1) is shown as the outer lining layer 2H, and the part that was the inner lining member 3 (see FIG. 1) is shown as the inner lining layer 3H.

[0048] As shown in FIGS. 12(a) and 12(b), the constructed lining pipe 10 has, from the outside in this order, an impermeable tube 21 formed in a cylindrical shape, an outer reinforcing layer 22H, a resin curing layer 31H, an inner reinforcing layer 32H, a retainer curing layer 33H, and an impermeable film 34. Since the impermeable tube 21 is made of an impermeable material, it remains unchanged before construction without the resin soaking in. This impermeable tube 21 is arranged on the outermost side of the lining pipe 10. This impermeable tube 21 is sandwiched between the outer reinforcing layer 22H and the inner peripheral surface of the branch pipe 71 due to the curing of the resin that had impregnated the inner lining member before inversion. The outer reinforcing layer 22H is a layer composed of a material with higher strength than the resin curing layer 31H, formed by the curing of the uncured resin that had penetrated from the carrier 31 to the first reinforcing body 22 in the inner lining member inversion insertion step (step S8). The resin curing layer 31H is a layer formed by the curing of the resin that the carrier 31 had carried before inversion insertion. The inner reinforcing layer 32H is a layer composed of a material with higher strength than the resin curing layer 31H, formed by the curing of the resin that the second reinforcing body 32 had carried before inversion insertion. The retainer curing layer 33H is a layer formed by the curing of the resin that the reinforcing body retainer 33 had carried before inversion insertion. The impermeable film 34 is arranged on the innermost side in this lining pipe 10. Since this impermeable film 34 is made of an impermeable material, it remains unchanged before construction without the resin soaking in. The impermeable film 34 in the lining pipe 10 corresponds to an example of an airtight layer.

[0049] According to the lining material 1 of this embodiment and the lining method using the lining material 1, since the outer lining member 2 and the inner lining member 3 are reversely inserted into the branch pipe 71 separately, even if the entire lining material 1 is highly strong and rigid, the reverse insertion is easy and the workability is good. In particular, by distributing the highly strong first reinforcing body 22 and the second reinforcing body 32 to different reverse insertion steps, the reverse insertion becomes easier. Further, since the entire lining material 1 is highly strong, a lining pipe 10 having high mechanical properties, particularly a high long-term flexural modulus (test method: JIS K7035 or JIS A7511) can be formed. Furthermore, since the resin is cured at room temperature, compared with the case of thermally curing or photocuring the resin, a base material is not required for curing, so fewer equipment is needed during construction, and after curing to a degree where shape maintenance is possible, it cures naturally, so the construction time can be shortened. Also, by reverse insertion, the highly strong first reinforcing body 22 and the second reinforcing body 32 are arranged to face each other with the thick carrier 31 sandwiched therebetween. In the state where the lining pipe 10 is formed, the outer reinforcing layer 22H and the inner reinforcing layer 32H are arranged at positions separated in the thickness direction, so the mechanical properties can be greatly enhanced. In addition, in this embodiment, the inner lining member 3 is impregnated with resin, and in the inner lining member reverse insertion step (step S8), the resin impregnated in the inner lining member 3 is made to soak into the outer lining member 2 by pressing the inner lining member 3 and the outer lining member 2 against the branch pipe 71. As a result, the outer lining member 2 does not need to be impregnated with resin, so the labor during construction is reduced and the workability is further improved. Moreover, since the lining pipe 10 has the impermeable film 34 on the innermost side, it is possible to prevent water and gas passing through the internal space formed by the lining pipe 10 from soaking into the lining pipe 10 and reducing the life of the lining pipe 10. Also, when solids or liquids pass through the internal space of the lining pipe 10, the movement resistance of the passing solids and the flow-down resistance of the passing liquids can be reduced.

[0050] Next, the configuration of the lining pipe 10 formed using the lining material 1 of the modification will be described. In the following description, components with the same names as the components described so far will be described with the same reference numerals used so far, and duplicate descriptions may be omitted. Also, the lining method is the same as that of the previous embodiment, and only the different parts will be described if there are any differences.

[0051] FIG. 13 is an enlarged view similar to FIG. 12(b), showing a cross-section of the lining pipe formed using the lining material of the modification. In FIG. 13, the portion marked with a cross is shown to have existed in the state of the lining material 1 before the inversion insertion but not to exist in the state of the lining pipe 10 as it is removed during construction.

[0052] In the lining pipe 10 shown in FIG. 13(a), the positions of the impermeable tube 21 and the outer reinforcing layer 22H in the outer lining layer 2H are reversed, and the fact that the impermeable tube 21 is removed is different from the lining pipe 10 shown in FIG. 12. That is, the lining pipe 10 shown in FIG. 13(a) is formed using the lining material 1 in which the positions of the impermeable tube 21 and the first reinforcing body 22 in the outer lining member 2 before the inversion insertion shown in FIG. 1 are reversed. Also, the impermeable tube 21 is removed before the inner lining member inversion insertion step (step S8) rather than after the outer lining member inversion insertion step (step S4). By doing so, the resin impregnated in the inner lining member 3 shown in FIG. 1 can also flow into the first reinforcing body 22 and penetrate the first reinforcing body 22.

[0053] The lining pipe 10 shown in Fig. 13(b) is different from the lining pipe 10 shown in Fig. 12 in that the inner impermeable tube 35 is arranged in the portion where the impermeable film 34 in the inner lining layer 3H is located until the time of reverse insertion, and the inner impermeable tube 35 is removed in the state of the lining pipe 10. That is, the lining pipe 10 shown in Fig. 13(b) is formed using the lining material 1 in which the inner impermeable tube 35 is arranged on the outermost side of the inner lining member 3 before reverse insertion, instead of the impermeable film 34. Further, the inner impermeable tube 35 is removed after the inner lining member reverse insertion step (step S8). Note that the inner impermeable tube 35 is the same as the impermeable tube 21 shown in Fig. 1.

[0054] The lining pipe 10 shown in Fig. 13(c) is different from the lining pipe 10 shown in Fig. 12 in that the positions of the impermeable tube 21 and the outer reinforcing layer 22H in the outer lining layer 2H are reversed, the impermeable tube 21 is removed, and the inner impermeable tube 35 is arranged in the portion where the impermeable film 34 in the inner lining layer 3H is located until the time of reverse insertion, and the inner impermeable tube 35 is removed in the state of the lining pipe 10. That is, the positions of the impermeable tube 21 and the first reinforcing body 22 in the outer lining member 2 before reverse insertion are reversed, and it is formed using the lining material 1 in which the inner impermeable tube 35 is arranged on the outermost side of the inner lining member 3, instead of the impermeable film 34. The impermeable tube 21 is removed after the outer lining member reverse insertion step (step S4) and before the inner lining member reverse insertion step (step S8). Further, the inner impermeable tube 35 is removed after the inner lining member reverse insertion step (step S8).

[0055] The lining tube 10 shown in Fig. 13(d) is different from the lining tube 10 shown in Fig. 12 in that an outer impermeable film 23 is disposed at a portion where the impermeable tube 21 in the outer lining layer 2H was disposed, and an inner impermeable tube 35 was disposed at a portion where the impermeable film 34 in the inner lining layer 3H was disposed until the time of reverse insertion, and the inner impermeable tube 35 is removed in the state of the lining tube 10. That is, an outer impermeable film 23 is disposed instead of the impermeable tube 21 in the outer lining member 2 before reverse insertion, and an inner impermeable tube 35 is disposed instead of the impermeable film 34 on the outermost side of the inner lining member 3 before reverse insertion. The inner impermeable tube 35 is removed after the inner lining member reverse insertion step (step S8). The outer impermeable film 23 is the same as the impermeable film 34 shown in Fig. 1.

[0056] Next, the configuration of the lining material 1 of the second embodiment and the lining tube 10 formed using the lining material 1 of the second embodiment will be described. The lining method is the same as that of the previous embodiment, and only the different parts will be described if there are any differences.

[0057] Fig. 14(a) is a perspective view similar to Fig. 1 showing the lining material of the second embodiment.

[0058] The lining material 1 of the second embodiment shown in Fig. 14(a) is different from the lining tube 10 shown in Fig. 1 in that the members constituting the outer lining member 2 and the members constituting the inner lining member 3 are interchanged. Also, the order of arrangement of the respective members constituting the outer lining member 2 is reversed, and the order of arrangement of the respective members constituting the inner lining member 3 is reversed, which is also different from the lining tube 10 shown in Fig. 1.

[0059] As shown in Fig. 14(a), the lining material 1 of the second embodiment is also composed of an outer lining member 2 and an inner lining member 3. The outer lining member 2 has a cylindrical shape with an outer impermeable film 23, an outer reinforcement retainer 24, an outer reinforcement 25, and an outer carrier 26 provided in this order from the inside. This outer reinforcement 25 corresponds to an example of the first reinforcement. The outer reinforcement retainer 24, the outer reinforcement 25, and the outer carrier 26 are integrated by being sewn together at various places in the plane direction. Note that the outer impermeable film 23 is coated inside the outer reinforcement retainer 24 without being sewn in order to maintain airtightness, and thus is integrated with the outer reinforcement retainer 24. The lengths of the outer impermeable film 23, the outer reinforcement retainer 24, the outer reinforcement 25, and the outer carrier 26 in the extending direction are the same. The outer reinforcement retainer 24 is the same as the reinforcement retainer 33 shown in Fig. 1. The outer reinforcement 25 is the same as the second reinforcement 32 shown in Fig. 1. The outer carrier 26 is the same as the carrier 31 shown in Fig. 1. Note that the outer impermeable film 23 is the same as the impermeable film 34 shown in Fig. 1 as already described.

[0060] The inner lining member 3 has a cylindrical shape with an inner impermeable tube 35 and an inner reinforcement 36. This inner reinforcement 36 corresponds to an example of the second reinforcement. The inner reinforcement 36 is the same as the first reinforcement 22 shown in Fig. 1. Note that the inner impermeable tube 35 is the same as the impermeable tube 21 as already described. The inner impermeable tube 35 and the inner reinforcement 36 are separate bodies, and there are also some parts where a very small second gap 3a is formed between the inner impermeable tube 35 and the inner reinforcement 36. In Fig. 14(a), in the enlarged view showing the end face of the outer lining member 2 surrounded by a circle, the second gap 3a is exaggeratedly shown, but actually there are also many parts where the inner impermeable tube 35 and the inner reinforcement 36 are in contact.

[0061] In the lining method using the lining material 1 of the second embodiment, in the outer lining member reverse insertion step (step S4), the outer lining member 2 is reversely inserted so that the outer carrier 26 is positioned inside the outer reinforcing body 25. Further, the inner impermeable tube 35 is removed after the inner lining member reverse insertion step (step S8).

[0062] FIG. 14(b) is an enlarged view similar to FIG. 12(b), showing a cross-section of the lining pipe formed using the lining material shown in FIG. 14(a). Similar to FIG. 13, in the state of the lining pipe 10, it does not exist, but a cross mark is attached to the portion that existed in the state of the lining material 1 before reverse insertion.

[0063] As shown in FIG. 14(b), the lining pipe 10 formed using the lining material 1 shown in FIG. 14(a) has, from the outside in this order, a cylindrical outer impermeable film 23, an outer holder cured layer 24H, a second outer reinforcing layer 25H, an outer resin cured layer 26H, and a second inner reinforcing layer 36H. In the state of the lining pipe 10, the inner impermeable tube 35 has been removed. The outer impermeable film 23 is arranged on the outermost side of this lining pipe 10. Since this outer impermeable film 23 is made of an impermeable material, it remains unchanged before construction without resin soaking in. The outer holder cured layer 24H is a layer formed by curing the resin carried by the outer reinforcing body holder 24 before reverse insertion. The second outer reinforcing layer 25H is a layer made of a material with higher strength than the outer resin cured layer 26H formed by curing the resin carried by the outer reinforcing body 25 before reverse insertion. The outer resin cured layer 26H is a layer formed by curing the resin carried by the outer carrier 26 before reverse insertion. The second inner reinforcing layer 36H is a layer made of a material with higher strength than the outer resin cured layer 26H formed by curing the uncured resin that penetrated from the outer carrier 26 to the inner reinforcing body 36 in the inner lining member reverse insertion step (step S8).

[0064] In the lining material 1 of this second embodiment and the lining method using the lining material 1, the same effects as those of the previous embodiment are achieved. However, unlike the lining pipe 10 shown in FIG. 12, in the lining pipe 10 shown in FIG. 14, an impermeable material is not provided on the innermost side. Therefore, there is a risk that water or gas passing through the internal space formed by the lining pipe 10 will soak into the lining pipe 10 and reduce the lifespan of the lining pipe 10. Further, compared with the lining pipe 10 shown in FIG. 12, in the lining pipe 10 shown in FIG. 14, when solids or liquids pass through the internal space of the lining pipe 10, the moving resistance of the passing solids or the flowing-down resistance of the passing liquids may be high.

[0065] Subsequently, regarding the modified example of the lining pipe 10 of the second embodiment described so far, the differences from the configuration described with reference to FIG. 14 will be mainly described. Also, the lining method is the same as that of the lining pipe 10 shown in FIG. 14, and only the different parts will be described if there are any differences.

[0066] FIG. 15 is an enlarged view similar to FIG. 14(b) showing a modified example of the lining pipe of the second embodiment. Similar to FIG. 14(b) in FIG. 15, although it does not exist in the state of the lining pipe 10, a cross mark is attached to the part that existed in the state of the lining material 1 before inversion insertion.

[0067] The lining pipe 10 shown in FIG. 15(a) is different from the lining pipe 10 shown in FIG. 14(b) in that an impermeable tube 21 is arranged at the part where the outer impermeable film 23 in the outer lining layer 2H was arranged. That is, the lining pipe 10 shown in FIG. 15(a) is formed using a lining material 1 in which the same impermeable tube 21 as that shown in FIG. 1 is arranged on the innermost side of the outer lining member 2 before inversion insertion, instead of the outer impermeable film 23. Note that this impermeable tube 21 and the outer reinforcement retainer 24 (see FIG. 14(a)) may be separate bodies or may be integrated by adhesion or the like.

[0068] The lining pipe 10 shown in Fig. 15(b) is different from the lining pipe 10 shown in Fig. 14(b) in that the impermeable tube 21 is arranged at the portion where the outer impermeable film 23 in the outer lining layer 2H was arranged, and the impermeable film 34 is arranged at the portion where the inner impermeable tube 35 in the inner lining layer 3H was removed. That is, in the lining pipe 10 shown in Fig. 15(b), the same impermeable tube 21 as that shown in Fig. 1 is arranged at the innermost part of the outer lining member 2 before being inserted in reverse, instead of the outer impermeable film 23, and the same impermeable film 34 as that shown in Fig. 1 is arranged at the outermost part of the inner lining member 3, instead of the inner impermeable tube 35. The lining pipe 10 is formed using the lining material 1. Note that the impermeable tube 21 and the outer reinforcement retainer 24 (see Fig. 14(a)) may be separate bodies or may be integrated by adhesion or the like. Further, since the impermeable film 34 is made of an impermeable material, it remains the same as before construction without the resin soaking in. The impermeable film 34 in this lining pipe 10 corresponds to an example of an airtight layer.

[0069] The lining pipe 10 shown in Fig. 15(c) differs from the lining pipe 10 shown in Fig. 14(b) in that the outer impermeable film 23 is not present in the outer lining layer 2H, and instead, the outer impermeable tube 27, which was located at the innermost position in the outer lining layer 2H, has been removed, and an impermeable film 34 is disposed at the portion where the inner impermeable tube 35 in the inner lining layer 3H has been removed. That is, in the lining pipe 10 shown in Fig. 15(c), the outer impermeable film 23 does not exist at the innermost position of the outer lining member 2 before inversion insertion, the outer impermeable tube 27 is disposed at the outermost position of the outer lining member 2, and the same impermeable film 34 as that shown in Fig. 1 is disposed at the outermost position of the inner lining member 3 instead of the inner impermeable tube 35. The impermeable film 34 in this lining pipe 10 corresponds to an example of an airtight layer. The outer impermeable tube 27 has been removed after the outer lining member inversion insertion step (step S4) and before the inner lining member inversion insertion step (step S8). By doing so, the resin impregnated in the inner lining member 3 can also flow into the inner reinforcing body 36 (see Fig. 14(a)) and penetrate into the inner reinforcing body 36. Note that the outer impermeable tube 27 is the same as the inner impermeable tube 35 shown in Fig. 14(a).

[0070] The lining pipe 10 shown in Fig. 15(d) differs from the lining pipe 10 shown in Fig. 14(b) in that the outer impermeable film 23 is not present in the outer lining layer 2H, and instead, the outer impermeable tube 27, which was located at the innermost position in the outer lining layer 2H, has been removed. That is, the lining pipe 10 shown in Fig. 15(c) is formed using the lining material 1 in which the outer impermeable film 23 does not exist at the innermost position of the outer lining member 2 before inversion insertion, and the outer impermeable tube 27 is disposed at the outermost position of the outer lining member 2. The outer impermeable tube 27 has been removed after the outer lining member inversion insertion step (step S4) and before the inner lining member inversion insertion step (step S8).

[0071] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope described in the claims. For example, in the present embodiment, the lining material 1, the lining method, and the lining pipe 10 have been described by way of an example of lining the sewer pipe. However, these lining material 1, the lining method, and the lining pipe 10 may be used for other pipes buried underground, such as underground electric wire pipes in which power cables are accommodated. Further, although an example of repairing the branch pipe 71 has been described, the main pipe 72 can also be repaired using the lining material 1, the lining method, and the lining pipe 10 described in the present embodiment. The lining material 1 of the present embodiment includes the first reinforcing body 22 and the second reinforcing body 32 or the outer reinforcing body 25 and the inner reinforcing body 36. However, the lining material 1 may include only one of the first reinforcing body 22 and the second reinforcing body 32 or only one of the outer reinforcing body 25 and the inner reinforcing body 36. Further, the lining material may be divided into three or more cylindrical bodies (lining members), and each cylindrical body (lining member) may be reversely inserted. Also, as the first reinforcing body 22, the second reinforcing body 32, the outer reinforcing body 25, and the inner reinforcing body 36, those having higher strength than the carrier 31 are used. However, it is not necessarily required that the strength of the lining material 1 before construction is higher than that of the carrier 31. The same strength as the carrier 31 or a lower strength than the carrier 31 may be used for some or all of these. However, the outer reinforcing layer 22H, the inner reinforcing layer 32H, the second outer reinforcing layer 25H, and the second inner reinforcing layer 36H formed from these are preferably layers having higher mechanical properties, particularly a higher long-term flexural modulus, than the resin cured layer 31H composed of the carrier 31. Further, in the present embodiment, an example has been described in which one of the outer lining member 2 and the inner lining member 3 is impregnated with resin, and the resin is permeated into the other one with respect to the one in the step of reversely inserting the inner lining member (step S8). However, both the outer lining member 2 and the inner lining member 3 may be impregnated with resin and then reversely inserted in order.

[0072] According to the embodiments and modified examples described above, it is possible to provide a lining method for reversibly inserting a lining material provided with a reinforcing body composed of the first reinforcing body 22 and the second reinforcing body 32 or the outer reinforcing body 25 and the inner reinforcing body 36 with good workability, a lining material with good workability provided with the reinforcing body, and a lining pipe having a high long-term flexural modulus.

[0073] Note that even constituent elements included only in each of the descriptions of the embodiments and modified examples described above may be applied to other embodiments and other modified examples.

[0074] The lining method described above is a lining method in which a cylindrical carrier carrying an uncured resin and a cylindrical reinforcing body are installed in a pipeline to line the inner surface of the pipeline, a first reverse insertion step of reversibly inserting a first cylindrical body having the reinforcing body without the resin carried thereon into the pipeline, and a second reverse insertion step of reversibly inserting a second cylindrical body having the carrier into the inside of the first cylindrical body and pressing the first cylindrical body and the second cylindrical body against the inner peripheral surface of the pipeline, wherein the second reverse insertion step is a step of allowing the resin carried on the carrier to penetrate into the reinforcing body.

[0075] In this lining method, the first reverse insertion step is a step of reversibly inserting the first cylindrical body in which an impermeable tube is disposed outside the reinforcing body into the pipeline, and a removal step of removing the impermeable tube may be provided between the first reverse insertion step and the second reverse insertion step.

[0076] Further, it is a lining method in which a cylindrical carrier carrying an uncured resin and a cylindrical reinforcing body are installed in a pipeline to line the inner surface of the pipeline, a first reverse insertion step of reversibly inserting a first cylindrical body having at least one of the carrier and the reinforcing body into the pipeline, A second cylindrical body having at least the other of the carrier and the reinforcing body may be reversely inserted inside the first cylindrical body, and a second reverse insertion step of pressing the first cylindrical body and the second cylindrical body against the inner peripheral surface of the pipeline may be provided.

[0077] Here, the resin may be one that cures at room temperature, may be a resin that cures at room temperature but whose curing is promoted by heating, may be a thermosetting resin that does not cure at room temperature but cures by heating, or may be a photocurable resin that cures by irradiation with light. In short, the resin may be any curable resin. The reinforcing body may be stronger than the carrier. This strength may be the tensile strength. Further, the reinforcing body may include any one or more of glass fiber, aramid fiber, carbon fiber, stainless steel fiber, and silica fiber, or may be a woven fabric of polyester fiber. Furthermore, the carrier may be composed of a non-woven fabric made of polyester. In addition, the first cylindrical body may have airtightness. Also, the second cylindrical body may have airtightness.

[0078] According to this lining method, since the first cylindrical body and the second cylindrical body are reversely inserted separately, the reverse insertion is easy and the workability is good.

[0079] In this lining method, either the first reverse insertion step or the second reverse insertion step may be a step of reversely inserting the cylindrical body having the reinforcing body.

[0080] Since the reinforcing body is reversely inserted separately in the first reverse insertion step and the second reverse insertion step, the reverse insertion is easy and the workability is good.

[0081] Also, in this lining method, the first reverse insertion step is a step of reversely inserting the first cylindrical body having a first reinforcing body constituting the reinforcing body into the pipeline. The second reverse insertion step may be a step of reversely inserting the second cylindrical body having the second reinforcing body and the carrier that constitute the reinforcing body into the first cylindrical body so that the second reinforcing body is positioned inside the carrier.

[0082] By doing so, since the first reinforcing body and the second reinforcing body are arranged at positions separated in the thickness direction, the long-term flexural modulus of the lining pipe constructed by this lining method can be increased.

[0083] Also, in this lining method, the first reverse insertion step is a step of reversely inserting the first cylindrical body having the first reinforcing body and the carrier that constitute the reinforcing body into the pipeline so that the carrier is positioned inside the first reinforcing body, The second reverse insertion step may be a step of reversely inserting the second cylindrical body having the second reinforcing body that constitutes the reinforcing body into the first cylindrical body.

[0084] Even by doing so, since the first reinforcing body and the second reinforcing body are arranged at positions separated in the thickness direction, the long-term flexural modulus of the lining pipe constructed by this lining method can be increased.

[0085] Furthermore, in this lining method, the second reverse insertion step may be a step of infiltrating the resin supported by the carrier into the reinforcing body.

[0086] By doing so, one of the first cylindrical body and the second cylindrical body does not need to be impregnated with the uncured resin before reverse insertion, so the workability is improved.

[0087] Also, the lining material described above is used for lining a pipeline, and is a lining material including a cylindrical carrier that supports an uncured resin and a cylindrical reinforcing body, the reinforcing body on which the resin is not supported is arranged on the outermost side, and a first cylindrical body arranged in the pipeline by reverse insertion, The carrier impregnated with the resin is disposed innermost, and a second cylindrical body disposed by being reversely inserted inside the first cylindrical body is provided.

[0088] Also, it is a lining material used for the purpose of lining a pipeline, and includes a cylindrical carrier for supporting an uncured resin and a cylindrical reinforcing body, a first cylindrical body having at least one of the carrier and the reinforcing body and disposed by being reversely inserted into the pipeline, and a second cylindrical body having at least the other of the carrier and the reinforcing body and disposed by being reversely inserted inside the first cylindrical body may be provided.

[0089] According to this lining material, since the first cylindrical body and the second cylindrical body are each reversely inserted, the reverse insertion is easy and the workability is good.

[0090] In this lining material, the first cylindrical body has a first reinforcing body that constitutes the reinforcing body, and the second cylindrical body may have a second reinforcing body that constitutes the reinforcing body.

[0091] By separating the first reinforcing body and the second reinforcing body into the first cylindrical body and the second cylindrical body, the reverse insertion is easy and the workability is improved.

[0092] Also, in this lining material, the carrier may be disposed between the first reinforcing body and the second reinforcing body.

[0093] According to this lining material, since the first reinforcing body and the second reinforcing body are disposed at positions separated from each other, the long-term flexural modulus of elasticity of the lining pipe constructed using this lining material can be increased.

[0094] Also, the lining pipe described above is a lining pipe disposed in a branch pipe branched from a main pipe buried in the ground, A cylindrical resin cured layer formed by curing the resin of a cylindrical carrier carrying an uncured resin, and a cylindrical outer reinforcing layer disposed between the branch pipe and the resin cured layer and made of a material different from that of the carrier, a cylindrical airtight layer disposed on the innermost side of this lining pipe and having airtightness, characterized by comprising a cylindrical inner reinforcing layer disposed between the airtight layer and the resin cured layer and made of a material different from that of the carrier.

[0095] Here, an airtight cylindrical outer airtight layer may be provided between the branch pipe and the outer reinforcing layer. Also, the inner reinforcing layer and the outer reinforcing body may be made of a material having a higher strength than the carrier. Further, the inner reinforcing layer may be made of a material having a higher strength than the outer reinforcing body.

[0096] According to this lining pipe, since the outer reinforcing layer and the inner reinforcing layer are disposed at positions separated in the thickness direction, the long-term flexural modulus of elasticity of the lining pipe can be increased. Also, since it has an airtight layer on the innermost side, it is possible to prevent water or gas passing through the internal space formed by this lining pipe from soaking into the lining pipe and reducing the life of the lining pipe. Further, it is possible to reduce the movement resistance of solids passing through the internal space of this lining pipe and the flow-down resistance of liquids passing through.

[0097] By the way, in recent years, in order to make a lining pipe formed by repairing a pipeline using a lining material function as a self-supporting pipe, high mechanical properties have been required for the lining pipe. These mechanical properties include long-term flexural modulus, long-term flexural strength, short-term flexural modulus, short-term flexural strength, tensile modulus, tensile strength, compressive modulus, and compressive strength. However, in order to make the lining pipe function as a self-supporting pipe, it is particularly important to improve the long-term flexural modulus. In order to increase the long-term flexural modulus of the lining pipe, it is conceivable to use a lining material provided with a reinforcing body in addition to a carrier that supports the resin. However, a lining material provided with a reinforcing body has a problem that the reversely inserting of the lining material becomes difficult to be smooth because the rigidity is higher than that of a lining material without a reinforcing body, and the workability in pipeline repair deteriorates.

[0098] The lining method described above is a lining method in which a cylindrical carrier carrying an uncured resin and a cylindrical reinforcing body are installed in a pipeline to line the pipeline, a first reverse insertion step of reversely inserting a first cylindrical body having the carrier into the pipeline, and a second reverse insertion step of reversely inserting a second cylindrical body having the reinforcing body not carrying the resin inside the first cylindrical body and pressing the first cylindrical body and the second cylindrical body against the inner peripheral surface of the pipeline, wherein the second reverse insertion step is a step of permeating the resin carried by the carrier into the reinforcing body.

[0099] In this lining method, the first reverse insertion step is a step of reversely inserting the first cylindrical body in which an impermeable tube is disposed outside the reinforcing body into the pipeline, and an removing step of removing the impermeable tube may be provided between the first reverse insertion step and the second reverse insertion step.

[0100] Also, the lining material described above is A lining material used for the purpose of lining a pipeline, comprising a cylindrical carrier for supporting an uncured resin and a cylindrical reinforcing body, a first cylindrical body in which the carrier supporting the resin is disposed on the outermost side and is disposed in the pipeline by inversion insertion, characterized in that it comprises a second cylindrical body in which the reinforcing body not supporting the resin is disposed on the innermost side and is disposed inside the first cylindrical body by inversion insertion.

[0101] According to these lining methods and lining materials, it is possible to provide a lining method for inverting and inserting a lining material provided with a reinforcing body with good workability and a lining material with good workability provided with a reinforcing body.

Explanation of reference numerals

[0102] 1 Lining material 2 Outer lining member (first cylindrical body) 3 Inner lining member (second cylindrical body) 22 First reinforcing body 31 Carrier 25 Outer reinforcing body (first reinforcing body) 26 Outer carrier (carrier) 32 Second reinforcing body 36 Inner reinforcing body (second reinforcing body) 71 Branch pipe (pipeline)

Claims

[Claim 1] A lining pipe for repairing a pipeline, a cylindrical cured resin layer formed by curing an uncured resin in a cylindrical support; A cylindrical outer reinforcing layer is disposed between the pipeline and the resin cured layer and is made of a material different from that of the carrier; a cylindrical airtight layer disposed on the innermost side of the lining pipe and having airtightness; A cylindrical inner reinforcing layer is disposed between the airtight layer and the resin cured layer and is made of a material different from that of the carrier. A lining pipe characterized in that the inner reinforcing layer is made of a material having a higher strength than the outer reinforcing layer.

Images