Lined tube

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 underground pipelines such as sewer pipes for flowing sewage and underground electric wire pipelines for accommodating electric cables. This pipeline includes a main pipe, a branch pipe (attachment pipe) 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 obstacles. 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 connecting a box formed on the ground surface part and the main pipe, a cylindrical lining material having a carrier carrying 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 for lined pipes formed by pipeline repair using lining materials to function as self-supporting pipes, high mechanical properties are required for lined pipes.

[0007] In view of the above circumstances, the present invention aims to provide a lined tube having high mechanical properties. [Means for solving the problem]

[0008] The lining tube of the present invention, which solves the above objective, A lining pipe for repairing pipelines, A cylindrical resin-cured layer formed by the curing of a cylindrical carrier that carries an uncured resin, Displaced between the aforementioned conduit and the resin curing layer, and made of a material different from the aforementioned carrier. and a material that is stronger than the carrier A cylindrical outer reinforcing layer composed of, An airtight cylindrical airtight layer is positioned on the innermost part of this lining tube, The airtight layer and the resin curing layer are disposed between them and a cylindrical inner reinforcing layer made of a different material from the carrier, The inner reinforcing layer is characterized by being made of a material with higher strength than the outer reinforcing layer. [Effects of the Invention]

[0009] According to the present invention, a lined tube with high mechanical properties can be provided. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing the schematic configuration of a lining material corresponding to one embodiment of the present invention. [Figure 2] This flowchart shows the flow of a lining method for repairing branch pipes by reinforcing them. [Figure 3] This diagram shows a pipeline repair device installed at a construction site. [Figure 4]This is a diagram for explaining the outer lining member storage process and the outer lining member attachment process shown in FIG. 2. [Figure 5] This is a diagram showing the state where the outer lining member is inverted from the inversion port to a length that can be inserted into the branch pipe. [Figure 6] This is a diagram showing the state after starting the outer lining member inversion insertion process (step S4) shown in FIG. 2. [Figure 7] This 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. [Figure 8] This is a diagram showing the state where the outer lining member inversion insertion process (step S4) has been completed. [Figure 9] This is a diagram for explaining the inner lining member storage process and the lining material attachment process shown in FIG. 2. [Figure 10] This is a diagram showing the state after starting the inner lining member inversion insertion process (step S8) shown in FIG. 2. [Figure 11] This is a diagram showing the state where the inner lining member inversion insertion process (step S8) shown in FIG. 2 has been completed. [Figure 12] (a) is a cross-sectional view showing the lining pipe, and (b) is an enlarged view of part B in FIG. (a). [Figure 13] This is an enlarged view similar to FIG. 12(b) showing the cross-section of a lining pipe formed using the lining material of the modified example. [Figure 14] (a) is a perspective view similar to FIG. 1 showing the lining material of the second embodiment, and (b) is an enlarged view similar to FIG. 12(b) showing the cross-section of a lining pipe formed using the lining material in FIG. (a). [Figure 15] This is an enlarged view similar to FIG. 14(b) showing a modified example of the lining pipe of the second embodiment.

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 flat and crushed 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 by inversion insertion inside the inverted outer lining member 2.

[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 composed 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, like the impermeable tube 21, is a seamless tubular shape. In the state before inversion insertion shown in Figure 1, the first reinforcing member 22 is positioned outside the impermeable tube 21. That is, the impermeable tube 21 is inserted inside the first reinforcing member 22. The length of the first reinforcing member 22 and the impermeable tube 21 in the extending direction is the same. The first reinforcing member 22 is made of a different material than the carrier 31, which will be described later, and has higher strength than the carrier 31. In this embodiment, strength refers to tensile strength. The first reinforcing member 22 in this embodiment is made of a cloth woven from fibers made of a polyester and cotton blend. As the first reinforcing member 22, a woven fabric containing at least one of glass fibers, polyester fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers, or a sheet material using yarn made of these fibers, may be used. Alternatively, as the first reinforcing member 22, a nonwoven fabric containing at least one of glass fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers may be used. The first reinforcing member 22 is separate from the impermeable tube 21, and in some areas a very small 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 together using an adhesive or the like. Note that in Figure 1, the first gap 2a is exaggerated in the magnified view of the end face of the outer lining member 2 enclosed in a circle, but in reality, there are many areas 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% to 50% of the total thickness of the lining material 1, and more preferably 10% to 40%. If the thickness of the first reinforcing member 22 is too thick, it becomes difficult to penetrate the entire first reinforcing member 22 with the uncured resin, which will be described in more detail later, and the mechanical properties of the lining tube 10 (see Figure 12) formed by the lining material 1 may decrease. Furthermore, if the thickness of the first reinforcing member 22 is too thin, the effect of enhancing the mechanical properties of the layer formed from this first reinforcing member 22 cannot be sufficiently obtained in the lining pipe 10.

[0016] The inner lining member 3 is cylindrical and comprises a carrier 31, a second reinforcing body 32, a reinforcing body holder 33, and an impermeable film 34. This inner lining member 3 is an example of a second cylindrical body. The inner lining member 3 is a cylindrical body having an outer surface circumference that is the same as, or slightly shorter than, the circumference of the inner 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 points in the planar direction. The impermeable film 34 is integrated with the reinforcing body holder 33 by being coated on the outside of the reinforcing body holder 33 without being sewn together in order to maintain airtightness. The carrier 31, the second reinforcing body 32, the reinforcing body holder 33, and the impermeable film 34 have the same length in the extending direction.

[0017] The carrier 31 is a seamless cylindrical shape positioned on the innermost side of the inner lining member 3 before inversion insertion. This carrier 31 carries the uncured resin. The thickness of the carrier 31 is the thickest among the components of the lining material. In this embodiment, the thickness of the carrier 31 is 3 to 4 mm. The carrier 31 is made of polyester nonwoven fabric. However, the carrier 31 is not limited to polyester; it may also be a nonwoven fabric made of fibrous material such as nylon, acrylic, or vinylon.

[0018] The second reinforcing member 32 is a seamless cylindrical shape positioned inside the carrier 31 before inversion insertion. The second reinforcing member 32 is made of a different material than the carrier 31 and has higher strength than the carrier 31. It is also preferable that the second reinforcing member 32 has higher strength than the first reinforcing member 22. By doing so, the long-term bending strength and short-term bending strength of the lining tube 10 (see Figure 12), which will be formed using the lining material 1, can be increased compared to the case where the second reinforcing member 32 has lower strength than the first reinforcing member 22. The second reinforcing member 32 in this embodiment is a sheet material with a thickness of 1 to 2 mm containing glass fibers. As the second reinforcing member 32, a woven fabric containing at least one of glass fibers, polyester fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers, or a sheet material using yarn made of these fibers, may be used. Alternatively, as the second reinforcing member 32, a nonwoven 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 is a seamless cylindrical shape positioned outside the second reinforcing member 32 before inversion insertion. This reinforcing member holder 33 holds the second reinforcing member 32 by sandwiching it between itself and the carrier 31. The reinforcing member holder 33 is made of the same polyester nonwoven fabric as the carrier 31. However, the reinforcing member holder 33 may also be made of a nonwoven fabric made of fibrous material such as nylon, acrylic, or vinylon.

[0020] The impermeable film 34 is an impermeable film made of polyurethane, which has higher radial stretchability than the impermeable tube 21. The impermeable film 34 covers the entire outermost surface of the inner lining member 3 before inversion insertion. The impermeable film 34 may be made of other materials such as polyethylene or nylon, as long as it is made of a material that is airtight and watertight. Furthermore, it is preferable that the impermeable film 34 be made of a material that has high stretchability in the planar direction.

[0021] Next, we will explain the lining method using the lining material 1 described above. Figure 2 is a flowchart showing the flow of the lining method for repairing branch pipes by backing, and Figure 3 is a diagram showing the pipeline repair device installed at the construction site.

[0022] In this explanation, we will use an example where the branch pipe 71 connecting the main pipe 72 and the manhole 73 is the target of repair. The length of the branch pipe 71 in the extending direction, that is, the length from the manhole-side opening 71a located on the manhole 73 side to the main pipe-side opening 71b located on the main pipe 72 side, is approximately 1m to 5m, and may exceed 5m.

[0023] As shown in Figure 2, first, the equipment installation process is carried out to install the pipeline repair device 9 shown in Figure 3 around the pipeline to be repaired (Step S1). Before carrying out the equipment installation process, it is desirable to remove any deposits inside the branch pipe 71 using a high-pressure cleaning vehicle and to check the condition inside the branch pipe 71 and the connection status between the branch pipe 71 and the main pipe 72 using a TV camera or the like.

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

[0025] The storage unit 5 includes a winding member 51 for winding up the outer lining member 2 and the inner lining member 3, and a pressure regulator 52 to which a compressed air supply means 4 is connected and which receives compressed air. In this embodiment, the storage unit 5 stores the outer lining member 2 or the inner lining member 3 in a wound state by rotating the handle 511 of the winding member 51. However, the storage state of the outer lining member 2 and the inner lining member 3 in the storage unit 5 is not limited to this, and for example, the outer lining member 2 or the inner lining member 3 may be stored in a zigzag pattern.

[0026] The opening 6 has a reversal opening 61 that is open to the left in Figure 3. The reversal opening 61 is an opening into which one end of the lining material stored in the storage section 5 is attached in a folded-out state, and the folded-out portion of the lining material is secured by an end fastener 611 such as a band or belt.

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

[0028] Figure 4 is a diagram illustrating the outer lining member storage process and the outer lining member installation process shown in Figure 2.

[0029] Once the device installation process is complete, the outer lining member storage process is carried out (step S2). In the outer lining member storage process, first, as shown in Figure 4(a), the end of the impermeable tube 21 of the outer lining member 2 shown in Figure 1 is sealed with duct tape T, and the end of the first reinforcing body 22 is attached to the end of the impermeable tube 21 with duct tape T. This end becomes the tip when the outer lining member 2 is turned over, so hereafter this end will be referred to as the outer member tip 2b, and the opposite end will be referred to as the outer member rear end 2c. Note that tapes other than duct tape T may be used for sealing and attaching, and the outer member tip 2b portions of both the impermeable tube 21 and the first reinforcing body 22 may be lightly tied together with string. The outer lining member 2 is cut to a suitable length at the construction site, taking into consideration the length of the branch pipe 71, the depth and size of the manhole 73, etc., as shown in Figure 3. Then, as shown in Figure 4(b), the tip 2b of the outer member, which is bound with masking tape T, is wrapped around the winding member 51 of the storage unit 5, and the outer lining member 2 is wound onto the winding member 51 by rotating the handle 511. Eventually, the outer lining member 2 is wound onto the winding member 51, leaving the rear end 2c of the outer member on the opposite side from the side that was wound onto the winding member 51, and is stored in the storage unit 5.

[0030] Subsequently, as shown in Figure 4(c), the rear end 2c of the outer member is folded outward through the reversal opening 61, and the folded rear end 2c of the outer member is attached to the opening 6 by the end fixing device 611 (step S3).

[0031] Next, preparations are made to carry out the outer lining member inversion insertion process (step S4) shown in Figure 2. This outer lining member inversion insertion process is an example of the first inversion insertion process.

[0032] Figure 5 shows the outer lining member inverted through the inversion 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 activated and compressed air is supplied into the storage unit 5 from the pressure regulator 52 as shown by the arc-shaped arrow in Figure 5, the outer lining member 2, with its rear end 2c attached to the reversal port 61, is pushed out from the reversal port 61 while reversing due to the pressure of the supplied compressed air, as shown in Figure 5. Here, when the length of the outer lining member 2 that has been pushed out from the reversal port 61 while reversing has reached a point where it can be slightly inserted into the branch pipe 71 from the manhole side opening 71a, the pressure regulator 52 is operated to temporarily stop the supply of compressed air. Then, by inserting the pushed-out end of the outer lining member 2, which has been partially reversed, into the branch pipe 71 from the manhole side opening 71a, preparations are made to carry out the outer lining member reversal insertion process (step S4).

[0034] Figure 6 shows the state after the inversion insertion process (step S4) of the outer lining member shown in Figure 2 has started, Figure 7 shows the state where the tip of the outer lining member has reached near the edge of the main pipe side opening, and Figure 8 shows the state after the inversion insertion process (step S4) of the outer lining member has been completed.

[0035] Once preparations for the outer lining member inversion insertion process (step S4) are complete, the pressure regulator 52 is operated to restart the supply of compressed air into the storage section 5, and the outer lining member inversion insertion process (step S4) is started. As compressed air is supplied to the storage section 5 again, as shown in Figure 6, the outer lining member 2 inserted into the branch pipe 71 inverts and extends toward the main pipe 72 due to the pressure of the supplied compressed air. Eventually, as shown in Figure 7, the outer tip 2b 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. At this point, when the pressure regulator 52 is operated to increase the supply pressure of compressed air, as shown in Figure 8, the duct tape T that was binding the outer tip 2b of the outer lining member 2 comes off, and the outer tip 2b of the outer lining member 2 opens. The opening of the outer tip 2b can be determined by the decrease in the pressure of the air supplied from the compressed air supply means 4. Subsequently, the end fixing device 611 is removed from the reversal opening 61, and the rear end 2c of the outer lining member 2, which was attached to the opening 6, is removed from the opening 6. With this, the outer lining member reversal insertion process (step S4) is completed.

[0036] Next, the inner lining member impregnation process shown in Figure 2 is carried out (step S5). In the inner lining member impregnation process, the inner lining member 3 is impregnated with uncured resin at the construction site. This resin is poured into the innermost support body 31 side of the inner lining member 3 before inversion insertion, thereby impregnating the inner lining member 3 with resin. The poured resin seeps in in the order of support body 31, second reinforcing body 32, and reinforcing body holder 33, and the impermeable film 34 prevents it from leaking out to the outside of the inner lining member 3. The resin to be impregnated is not particularly limited, but in this embodiment, a mixture of vinyl ester resin as the main component and fillers and various additives is used. Instead of vinyl ester resin, thermosetting resins such as unsaturated polyester resin or urethane acrylate resin may be used. Furthermore, the resin used for impregnation in this embodiment hardens at room temperature, but it may also be a resin that hardens at room temperature but whose hardening is accelerated by heating, a thermosetting resin that does not harden at room temperature but hardens by heating, or a photocurable resin that hardens when irradiated with light. In short, any curable resin will do. When using a thermosetting resin, a heat supply device should also be prepared as part of the pipeline repair device 9, and when using a photocurable resin, a light irradiation device should also be prepared as part of the pipeline repair device 9. It is preferable that the inner lining member 3 be cut to the same length as the outer lining member 2 at the construction site before impregnation.

[0037] Figure 9 is a diagram illustrating the inner lining member storage process and the lining material installation process shown in Figure 2.

[0038] Once the inner lining member impregnation process is complete, the inner lining member storage process is carried out (step S6). In the inner lining member storage process, first, the inner lining member 3, which has been impregnated with uncured resin in the lining member impregnation process, and the pressing cylindrical body 8 are prepared. The pressing cylindrical body 8 is made of polyester fiber woven fabric coated with soft polyvinyl chloride, and during construction, it plays the role of pressing the outer lining member 2 and the inner lining member 3 from the inside toward the branch pipe, and is recovered after construction. The pressing cylindrical body 8 is also slightly longer than the inner lining member 3. In the inner lining member storage process, first, as shown in Figure 9(a), the tip of the inner lining member 3, which has been impregnated with uncured resin, is tied with a string-like body 80 such as a rope that is passed inside the pressing cylindrical body 8. Next, by pulling the string-like body 80, the inner lining member 3 is completely pulled into the pressing cylindrical body 8 through the opening 8e at one end of the pressing cylindrical body 8. As a result, as shown in Figure 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] Next, the string-like body 80 that was binding the tip of the inner lining member 3 is untied, and then, as shown in Figure 9(c), one end of the pressing cylindrical body 8 is tied and closed. The closed end becomes the tip when the pressing cylindrical body 8 has finished reversing, and will therefore be referred to as the pressing cylindrical body tip 8a. Next, one end of the reversal belt 83 is tied to the tied pressing cylindrical body tip 8a. The other end of the reversal belt 83 is attached to the winding member 51 of the storage unit 5, and by rotating the handle 511, the reversal belt 83 is wound onto the winding member 51, and eventually the inner lining member 3 also enters through the reversal opening 61 and is wound onto the winding member 51 as shown in Figure 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 installation process is carried out (step S7). In the lining material installation process, first, the end of the inner lining member 3 opposite to the side wound onto the winding member 51 is folded outwards from the reversal opening 61 together with the end of the pressing cylindrical body 8. Then, the rear end 2c of the outer lining member 2, which had been removed, is placed over the folded-over outer part, and the end fixing device 611 is placed over the outside of that, thereby attaching the ends of the inner lining member 3, the pressing cylindrical body 8, and the outer lining member 2 to the opening 6. Figure 9(e) is an enlarged cross-sectional view showing 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 reversal opening 61 of the opening 6. As shown in Figure 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 reversal opening 61 of the mouth 6, the pressing cylindrical body 8 is positioned on the outer circumference of the reversal opening 61, the inner lining member 3 is positioned outside of it, and the outer lining member 2 is positioned further outside of it.

[0041] Next, the inner lining member inversion insertion process shown in Figure 2 is performed (step S8). This inner lining member inversion insertion process is an example of the second inversion insertion process.

[0042] Figure 10 shows the state after the inversion insertion process (step S8) of the inner lining member shown in Figure 2 has started, and Figure 11 shows the state after the inversion insertion process (step S8) of the inner lining member shown in Figure 2 has been completed.

[0043] The inner lining member inversion insertion process is initiated by operating the pressure regulator 52 and starting the supply of compressed air into the storage section 5. In this inner lining member inversion insertion process, the outer lining member 2, which was inserted inverted earlier, acts as a guide for the inversion insertion of the inner lining member 3 and the pressing cylindrical body 8 into the branch pipe 71. As compressed air is supplied into the storage section 5, as shown in Figure 10, the pressure of the supplied compressed air causes the inner lining member 3 and the pressing cylindrical body 8 to invert inside the outer lining member 2 and be guided by the outer lining member 2, extending toward the main pipe 72. The outer lining member 2 is in a deflated state before the inner lining member inversion insertion process, but as the inner lining member 3 and the pressing cylindrical body 8 enter inside it inverted, it expands in diameter again and is pressed against the inner circumferential surface of the branch pipe 71 by the inner lining member 3 and the pressing cylindrical body 8. Eventually, as shown in Figure 11, the tip of the inner lining member 3 reaches near the edge of the main pipe side opening 71b and stops there. When the inner lining member 3 is inverted and inserted, the second reinforcing member 32 is positioned inside the carrier 31 and the first reinforcing member 22 is positioned outside the carrier 31. The tip 82a of the pressing cylindrical body 8 is closed by tying one end of the reversal belt 83 to it. The reversal belt 83, which extends from the tip 82a, runs through the space V surrounded by the inner circumferential surface of the pressing cylindrical body 8 shown in Figure 11, and this reversal belt 83 is connected to the winding member 51. In addition, appropriate tension can be applied to the inner lining member 3 and pressing cylindrical body 8, which are inserted into the branch pipe 71 by the pressure of compressed air, by manually operating the winding member 51 to which the reversal belt 83 is connected. Furthermore, if the inner lining member 3 and the pressing cylindrical body 8 do not advance smoothly, it is preferable to perform a winding operation using the winding member 51. This makes it possible to smoothly reverse and insert the inner lining member 3 and the pressing cylindrical body 8 into the branch pipe 71.

[0044] Furthermore, as shown in the enlarged view of the circled area in Figure 11, the lining material 1 (outer lining member 2 and inner lining member 3) inserted into the branch pipe 71 by two inversion insertions is superimposed on the inner surface of the branch pipe 71, with the pressing cylindrical body 8 positioned inside the lining material 1. The pressure of the supplied compressed air is applied to this pressing cylindrical body 8, and as indicated by the arrow in the enlarged view of Figure 11, the lining material 1 is pressed against the branch pipe 71 via the pressing cylindrical body 8. At this time, the uncured resin impregnated in the inner lining member 3 flows due to the pressing, flows into the first reinforcing body 22 of the outer lining member 2, and penetrates into the first reinforcing body 22. This pressing of the lining material 1 by the pressing cylindrical body 8 continues until the resin impregnated in the lining material 1 has hardened to a certain extent and the lining material 1 can maintain its cylindrical shape. Once the resin has hardened to the extent that the lining material 1 can maintain its cylindrical shape, the inner lining member inversion and insertion process (step S8) is completed.

[0045] Next, the pressing cylinder retrieval process (step S9) shown in Figure 2 is carried out. In this pressing cylinder retrieval process, the simplest method is to pull the reversing belt 83 manually. This causes the pressing cylinder 8 to be pulled off the lining material 1 and dragged to the ground. Alternatively, the reversing belt 83 may be wound up by the winding member 51 by rotating the handle 511, and the pressing cylinder 8 may be pulled. In this case, the reversing belt 83 may be wound up while supplying air into the lining material 1 at a very low pressure from the compressed air supply means 4. At this point, the resin of the lining material 1 has hardened to the extent that it can maintain its shape while pressed against the branch pipe 71, so after the pressing cylinder 8 is pulled off, the cylindrical lining material 1 along the branch pipe 71 remains inside the branch pipe 71. Hereinafter, this cylindrical lining material 1 remaining inside the branch pipe 71 may be referred to as the lining pipe 10.

[0046] Once the pressing cylindrical body 8 has been completely removed from the branch pipe 71, the lining material 1 is cut at the manhole-side opening 71a, and the pressing cylindrical body 82 and the cut lining material 1 are recovered. Then, if necessary, the manhole-side opening 71a is finished with pipe opening finishing material. Furthermore, a drilling machine is inserted into the main pipe 71, and the portion of the lining pipe 10 protruding into the main pipe 71 is cut off at the main pipe-side opening 71b, thereby completing the pipeline repair. The impregnated resin will harden further over time, and eventually the lining pipe 10 will function as a self-supporting pipe.

[0047] Figure 12(a) is a cross-sectional view showing the lining tube, and Figure 12(b) is an enlarged view of section B in Figure 12(a). In Figure 12(a), the thickness of each element constituting the lining tube 10 is exaggerated. In Figure 12(b), the portion that was the outer lining member 2 (see Figure 1) in the state of the lining material 1 (see Figure 1) before inversion insertion is shown as the outer lining layer 2H, and the portion that was the inner lining member 3 (see Figure 1) is shown as the inner lining layer 3H.

[0048] As shown in Figures 12(a) and 12(b), the constructed lining pipe 10 has, from the outside in, a cylindrically molded impermeable tube 21, 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. The impermeable tube 21 is made of an impermeable material, so the resin does not seep in and it remains unchanged from before construction. This impermeable tube 21 is located on the outermost side of the lining pipe 10. This impermeable tube 21 is sandwiched between the outer reinforcing layer 22H and the inner circumferential surface of the branch pipe 71 as the resin that was impregnated into the inner lining member before inversion hardens. The outer reinforcing layer 22H is a layer made of a material with higher strength than the resin curing layer 31H, formed when the uncured resin that penetrated from the carrier 31 to the first reinforcing member 22 in the inner lining member inversion insertion process (step S8) hardens. The resin curing layer 31H is a layer formed by the curing of the resin that was supported by the support body 31 before inversion insertion. The inner reinforcing layer 32H is a layer made of a material with higher strength than the resin curing layer 31H, formed by the curing of the resin that was supported by the second reinforcing body 32 before inversion insertion. The retaining body curing layer 33H is a layer formed by the curing of the resin that was supported by the reinforcing body retaining body 33 before inversion insertion. The impermeable film 34 is located on the innermost side of this lining pipe 10. Since this impermeable film 34 is made of an impermeable material, the resin does not seep in and it remains unchanged from before construction. The impermeable film 34 in the lining pipe 10 is an example of an airtight layer.

[0049] According to the lining material 1 and the lining method using the lining material 1 of this embodiment, the outer lining member 2 and the inner lining member 3 are inserted into the branch pipe 71 separately by inversion. Therefore, even if the lining material 1 as a whole has high strength and rigidity, inversion insertion is easy and workability is good. In particular, by distributing the high-strength first reinforcing members 22 and second reinforcing members 32 to separate inversion insertion processes, inversion insertion is made even easier. Furthermore, because the lining material 1 as a whole has high strength, it is possible to form a lining pipe 10 with high mechanical properties, especially a high long-term flexural modulus (test method: JIS K7035 or JIS A7511). In addition, since the resin is cured at room temperature, compared to cases where the resin is heat-cured or light-cured, a base material is not required for curing, so fewer pieces of equipment are needed during construction. Moreover, after curing to a degree that allows the shape to be maintained, it cures naturally, so construction time is also shortened. Furthermore, by inverting and inserting, the first and second reinforcement members 22 and 32, which have high strength, are positioned opposite each other with the thicker carrier 31 in between. In the state where the lining pipe 10 is formed, the outer reinforcement layer 22H and the inner reinforcement layer 32H are positioned at a distance from each other in the thickness direction, which greatly enhances the mechanical properties. In addition, in this embodiment, the inner lining member 3 is impregnated with resin, and in the inner lining member inversion insertion process (step S8), the inner lining member 3 and the outer lining member 2 are pressed against the branch pipe 71, causing the resin impregnated in the inner lining member 3 to seep into the outer lining member 2. As a result, the outer lining member 2 does not need to be impregnated with resin, reducing the labor involved in construction and improving workability. Moreover, since the lining pipe 10 has an impermeable film 34 on the innermost side, it is possible to suppress water and gas passing through the internal space formed by the lining pipe 10 from seeping into the lining pipe 10 and reducing the lifespan of the lining pipe 10. Furthermore, when a solid or liquid passes through the internal space of the lining tube 10, the resistance to movement of the solid passing through and the resistance to flow of the liquid passing through can be reduced.

[0050] Next, the structure of the lining pipe 10 formed using the modified lining material 1 will be described. In the following description, components with the same names as those described so far will be denoted by the same reference numerals used so far, and redundant explanations may be omitted. The lining method is the same as in the previous embodiment, and only the differences will be described if there are any.

[0051] Figure 13 is an enlarged view similar to Figure 12(b), showing a cross-section of a lined pipe formed using a modified lining material. The parts marked with an "X" in Figure 13 are removed during construction and therefore do not exist in the state of the lined pipe 10, but they were present in the state of the lining material 1 before inversion insertion.

[0052] The lining tube 10 shown in Figure 13(a) differs from the lining tube 10 shown in Figure 12 in that the positions of the impermeable tube 21 and the outer reinforcing layer 22H in the outer lining layer 2H are reversed, and the impermeable tube 21 has been removed. In other words, the lining tube 10 shown in Figure 13(a) is formed using a 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 inversion insertion shown in Figure 1 are reversed. Furthermore, the impermeable tube 21 is removed after the outer lining member inversion insertion process (step S4) but before the inner lining member inversion insertion process (step S8). This allows the resin that was impregnated in the inner lining member 3 shown in Figure 1 to flow into the first reinforcing body 22 and permeate it.

[0053] The lining tube 10 shown in Figure 13(b) differs from the lining tube 10 shown in Figure 12 in that an inner impermeable tube 35 is placed in the portion of the inner lining layer 3H where the impermeable film 34 was located until inversion insertion, and this inner impermeable tube 35 is removed in the lining tube 10 state. In other words, the lining tube 10 shown in Figure 13(b) is formed using a lining material 1 in which an inner impermeable tube 35 is placed on the outermost part of the inner lining member 3 instead of the impermeable film 34 before inversion insertion. Furthermore, the inner impermeable tube 35 is removed after the inner lining member inversion insertion process (step S8). Note that the inner impermeable tube 35 is the same as the impermeable tube 21 shown in Figure 1.

[0054] The lining tube 10 shown in Figure 13(c) differs from the lining tube 10 shown in Figure 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 has been removed, and an inner impermeable tube 35 was placed in the area where the impermeable film 34 was placed in the inner lining layer 3H until inversion insertion, and this inner impermeable tube 35 has been removed in the lining tube 10 state. In other words, the positions of the impermeable tube 21 and the first reinforcing member 22 in the outer lining member 2 before inversion insertion are reversed, and the lining material 1 is formed using an inner impermeable tube 35 placed on the outermost part of the inner lining member 3 instead of the impermeable film 34. The impermeable tube 21 is removed after the outer lining member inversion insertion process (step S4) but before the inner lining member inversion insertion process (step S8). Furthermore, the inner impermeable tube 35 is removed after the inner lining member inversion insertion process (step S8).

[0055] The lining tube 10 shown in Figure 13(d) differs from the lining tube 10 shown in Figure 12 in that an outer impermeable film 23 is placed in the area where the impermeable tube 21 was located in the outer lining layer 2H, and an inner impermeable tube 35 is placed in the area where the impermeable film 34 was located in the inner lining layer 3H until inversion insertion, and the inner impermeable tube 35 is removed in the state of the lining tube 10. In other words, the lining tube 10 is formed using a lining material 1 in which an outer impermeable film 23 is placed in place of the impermeable tube 21 in the outer lining member 2 before inversion insertion, and an inner impermeable tube 35 is placed in place of the impermeable film 34 on the outermost part of the inner lining member 3 before inversion insertion. The inner impermeable tube 35 is removed after the inner lining member inversion insertion process (step S8). The outer impermeable film 23 is the same as the impermeable film 34 shown in Figure 1.

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

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

[0058] The lining material 1 of the second embodiment shown in Figure 14(a) differs from the lining pipe 10 shown in Figure 1 in that the members constituting the outer lining member 2 and the members constituting the inner lining member 3 are swapped. Furthermore, it differs from the lining pipe 10 shown in Figure 1 in that the order of the members constituting the outer lining member 2 is reversed, as is the order of the members constituting the inner lining member 3.

[0059] As shown in Figure 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 is cylindrical in shape and comprises an outer impermeable film 23, an outer reinforcing member holder 24, an outer reinforcing member 25, and an outer carrier 26 in that order from the inside. This outer reinforcing member 25 corresponds to an example of the first reinforcing member. The outer reinforcing member holder 24, the outer reinforcing member 25, and the outer carrier 26 are integrated by being sewn together at various points in the planar direction. The outer impermeable film 23 is not sewn together to maintain airtightness, but is coated on the inside of the outer reinforcing member holder 24, thereby integrating it with the outer reinforcing member holder 24. The length of the outer impermeable film 23, the outer reinforcing member holder 24, the outer reinforcing member 25, and the outer carrier 26 in the extending direction is the same. The outer reinforcing member holder 24 is the same as the reinforcing member holder 33 shown in Figure 1. The outer reinforcing member 25 is the same as the second reinforcing member 32 shown in Figure 1. The outer carrier 26 is the same as the carrier 31 shown in Figure 1. The outer impermeable film 23 is the same as the impermeable film 34 shown in Figure 1, as already explained.

[0060] The inner lining member 3 is cylindrical in shape and comprises an inner impermeable tube 35 and an inner reinforcing body 36. This inner reinforcing body 36 corresponds to an example of a second reinforcing body. The inner reinforcing body 36 is the same as the first reinforcing body 22 shown in Figure 1. The inner impermeable tube 35 is the same as the impermeable tube 21, as already explained. The inner impermeable tube 35 and the inner reinforcing body 36 are separate components, and in some areas a very small second gap 3a is formed between the inner impermeable tube 35 and the inner reinforcing body 36. Note that in Figure 14(a), the second gap 3a is exaggerated in the magnified view of the end face of the outer lining member 2 enclosed in a circle, but in reality, there are many areas where the inner impermeable tube 35 and the inner reinforcing body 36 are in contact.

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

[0062] Figure 14(b) is an enlarged view, similar to Figure 12(b), showing a cross-section of a lined tube formed using the lining material shown in Figure 14(a). Similar to Figure 13, Figure 14(b) also shows cross marks indicating areas that were not present in the lined tube 10 but were present in the lining material 1 before inversion insertion.

[0063] As shown in Figure 14(b), the lining pipe 10 formed using the lining material 1 shown in Figure 14(a) has, from the outside in this order, a cylindrical outer impermeable film 23, an outer retainer hardened layer 24H, a second outer reinforcing layer 25H, an outer resin hardened layer 26H, and a second inner reinforcing layer 36H. Note that the inner impermeable tube 35 has been removed in the state of the lining pipe 10. The outer impermeable film 23 is located on the outermost side of this lining pipe 10. Since this outer impermeable film 23 is made of an impermeable material, the resin does not seep in and it remains unchanged from before construction. The outer retainer hardened layer 24H is a layer formed by the hardening of the resin that was supported by the outer reinforcing retainer 24 before inversion insertion. The second outer reinforcing layer 25H is a layer made of a material with higher strength than the outer resin hardened layer 26H, which is formed by the hardening of the resin that was supported by the outer reinforcing unit 25 before inversion insertion. The outer resin cured layer 26H is a layer formed by the curing of the resin that was supported by the outer carrier 26 before inversion 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 the curing of uncured resin that penetrated from the outer carrier 26 to the inner reinforcing layer 36 during the inner lining member inversion insertion process (step S8).

[0064] The lining material 1 of this second embodiment and the lining method using the lining material 1 also produce the same effects as in the previous embodiment. However, unlike the lining tube 10 shown in Figure 12, the lining tube 10 shown in Figure 14 does not have an impermeable material on the innermost layer, so there is a risk that water or gas passing through the internal space formed by the lining tube 10 may seep into the lining tube 10, reducing its lifespan. Also, compared to the lining tube 10 shown in Figure 12, the lining tube 10 shown in Figure 14 may have higher resistance to movement of solids or flow of liquids when solids or liquids pass through the internal space of the lining tube 10.

[0065] Next, we will describe a modified version of the lining tube 10 of the second embodiment described so far, focusing on the differences from the configuration described using Figure 14. The lining method is the same as that of the lining tube 10 shown in Figure 14, and only the differences will be described if there are any.

[0066] Figure 15 is an enlarged view similar to Figure 14(b) showing a modified example of the lining tube of the second embodiment. In Figure 15, as in Figure 14(b), parts that were not present in the state of the lining tube 10 but were present in the state of the lining material 1 before inversion insertion are marked with an "X".

[0067] The lining tube 10 shown in Figure 15(a) differs from the lining tube 10 shown in Figure 14(b) in that an impermeable tube 21 is placed in the portion of the outer impermeable film 23 that was previously located in the outer lining layer 2H. In other words, the lining tube 10 shown in Figure 15(a) is formed using a lining material 1 in which the same impermeable tube 21 as shown in Figure 1 is placed on the innermost part 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 reinforcing member holder 24 (see Figure 14(a)) may be separate components or may be integrated by adhesive or other means.

[0068] The lining tube 10 shown in Figure 15(b) differs from the lining tube 10 shown in Figure 14(b) in that an impermeable tube 21 is placed in the portion of the outer impermeable film 23 that was previously placed in the outer lining layer 2H, and an impermeable film 34 is placed in the portion of the inner impermeable tube 35 that was previously removed in the inner lining layer 3H. In other words, the lining tube 10 shown in Figure 15(b) is formed using a lining material 1 in which the same impermeable tube 21 as shown in Figure 1 is placed on the innermost part of the outer lining member 2 instead of the outer impermeable film 23, and the same impermeable film 34 as shown in Figure 1 is placed on the outermost part of the inner lining member 3 instead of the inner impermeable tube 35. Note that the impermeable tube 21 and the outer reinforcing member holder 24 (see Figure 14(a)) may be separate or integrated by adhesive or the like. Furthermore, since the impermeable film 34 is made of an impermeable material, the resin does not seep in, and it remains unchanged from before installation. This impermeable film 34 in the lining pipe 10 is an example of an airtight layer.

[0069] The lined tube 10 shown in Figure 15(c) differs from the lined tube 10 shown in Figure 14(b) in that the outer lining layer 2H lacks an outer impermeable film 23, 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 placed in the area where the inner impermeable tube 35 was removed in the inner lining layer 3H. In other words, the lined tube 10 shown in Figure 15(c) is formed using a lining material 1 in which the outer impermeable film 23 is not present at the innermost position of the outer lining member 2 before inversion insertion, the outer impermeable tube 27 is placed at the outermost position of the outer lining member 2, and the same impermeable film 34 as shown in Figure 1 is placed at the outermost position of the inner lining member 3 instead of the inner impermeable tube 35. The impermeable film 34 in this lined tube 10 corresponds to an example of an airtight layer. The outer impermeable tube 27 is removed after the outer lining member inversion insertion step (step S4) but before the inner lining member inversion insertion step (step S8). This allows the resin impregnated in the inner lining member 3 to flow into the inner reinforcing body 36 (see Figure 14(a)) and permeate into the inner reinforcing body 36. The outer impermeable tube 27 is the same as the inner impermeable tube 35 shown in Figure 14(a).

[0070] The lined tube 10 shown in Figure 15(d) differs from the lined tube 10 shown in Figure 14(b) in that the outer lining layer 2H does not have an outer impermeable film 23, and instead the outer impermeable tube 27, which was located at the innermost position in the outer lining layer 2H, has been removed. In other words, the lined tube 10 shown in Figure 15(c) is formed using a lining material 1 in which the outer impermeable film 23 is not present at the innermost position of the outer lining member 2 before inversion insertion, and the outer impermeable tube 27 is positioned at the outermost position of the outer lining member 2. The outer impermeable tube 27 is removed after the outer lining member inversion insertion process (step S4) but before the inner lining member inversion insertion process (step S8).

[0071] The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims. For example, in this embodiment, the lining material 1, lining method, and lining pipe 10 were described in the example of lining a sewer pipe, but these lining material 1, lining method, and lining pipe 10 may also be used in other underground conduits such as underground power conduits that house power cables. Also, although an example of repairing a branch pipe 71 was described, the main pipe 72 can also be repaired using the lining material 1, lining method, and lining pipe 10 described in this embodiment. In this embodiment, the lining material 1 comprises a first reinforcing body 22 and a second reinforcing body 32 or an outer reinforcing body 25 and an inner reinforcing body 36, but the lining material 1 may comprise 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. Furthermore, the lining material may be divided into three or more cylindrical bodies (lining members), and each cylindrical body (lining member) may be inserted in reverse. Furthermore, although the first reinforcing member 22, second reinforcing member 32, outer reinforcing member 25, and inner reinforcing member 36 were made of materials with higher strength than the carrier 31, it is not necessarily required that they have higher strength than the carrier 31 in the state of the lining material 1 before construction. Some or all of these may be made of materials with the same strength as the carrier 31 or with lower strength than the carrier 31. However, it is preferable that the outer reinforcing layer 22H, inner reinforcing layer 32H, second outer reinforcing layer 25H, and second inner reinforcing layer 36H formed from these materials have higher mechanical properties, particularly a higher long-term flexural modulus, than the resin cured layer 31H made of the carrier 31. Moreover, although this embodiment was described using an example in which resin is impregnated into one of the outer lining member 2 and the inner lining member 3, and then the resin is permeated into the other in the inner lining member inversion insertion step (step S8), both the outer lining member 2 and the inner lining member 3 may be impregnated with resin and then each may be inverted and inserted in order.

[0072] According to the embodiments and modifications described above, it is possible to provide a lining method for easily inverting and inserting a lining material equipped with reinforcing members consisting of a first reinforcing member 22 and a second reinforcing member 32 or an outer reinforcing member 25 and an inner reinforcing member 36, a lining material equipped with such reinforcing members that is easy to install, and a lining pipe having a high long-term flexural modulus.

[0073] Furthermore, even if a constituent element is included only in the description of the embodiments or each of the modifications described above, that constituent element may be applied to other embodiments or other modifications.

[0074] The lining method described above is a method of lining a pipeline by installing a cylindrical carrier body supporting uncured resin and a cylindrical reinforcing body inside the pipeline, A first inversion insertion step involves inverting and inserting a first cylindrical body having the reinforcing body without the resin supported into the conduit, The process includes a second inversion insertion step in which a second cylindrical body having the support body is inverted and inserted into the inside of the first cylindrical body, and the first cylindrical body and the second cylindrical body are pressed toward the inner circumferential surface of the conduit, The second inversion insertion step is characterized by the step of permeating the resin supported on the carrier into the reinforcing body.

[0075] In this lining method, the first inversion insertion step is a step of inverting and inserting the first cylindrical body, in which an impermeable tube is arranged outside the reinforcing body, into the conduit. A removal step for removing the impermeable tube may be included between the first inversion insertion step and the second inversion insertion step.

[0076] Furthermore, a lining method is provided in which a cylindrical carrier bearing an uncured resin and a cylindrical reinforcing body are installed inside the pipeline to back the pipeline, A first inversion insertion step involves inverting and inserting a first cylindrical body having at least one of the carrier and the reinforcing body into the conduit, The invention may also be characterized by a second inversion insertion step, in which a second cylindrical body having at least the other of the carrier and the reinforcing body is inverted and inserted into the inside of the first cylindrical body, and the first cylindrical body and the second cylindrical body are pressed toward the inner circumferential surface of the conduit.

[0077] Here, the resin may be one that hardens at room temperature, one that hardens at room temperature but whose hardening is accelerated by heating, one that does not harden at room temperature but hardens by heating, or one that is a photocurable resin that hardens by irradiation with light. In short, the resin can be any curable resin. The reinforcing body may have higher strength than the carrier. This strength may be tensile strength. The reinforcing body may also contain one or more of the following: glass fibers, aramid fibers, carbon fibers, stainless steel fibers, or silica fibers, or it may be a woven polyester fiber fabric. Furthermore, the carrier may be made of a nonwoven polyester fabric. In addition, the first cylindrical body may be airtight. The second cylindrical body may also be airtight.

[0078] According to this lining method, the first cylindrical body and the second cylindrical body are inserted separately by inverting them, making inverting insertion easy and improving workability.

[0079] In this lining method, both the first inversion insertion step and the second inversion insertion step may be steps of inverting and inserting the cylindrical body having the reinforcing body.

[0080] Since the reinforcing body is inserted by inverting it in two separate steps, the inverting insertion is easy and the workability is good.

[0081] Furthermore, in this lining method, the first inversion insertion step is a step of inverting and inserting the first cylindrical body having the first reinforcing body into the conduit. The second inversion insertion step may be a step of inverting and inserting the second cylindrical body, which has the second reinforcing body and the carrier body that constitute the reinforcing body, into the inside of the first cylindrical body such that the second reinforcing body is positioned inside the carrier body.

[0082] By doing so, the first and second reinforcing members are positioned at separate locations in the thickness direction, which increases the long-term flexural modulus of the lined pipe constructed by this lining method.

[0083] Furthermore, in this lining method, the first inversion insertion step is a step of inverting and inserting the first cylindrical body having the first reinforcing body and the carrier body into the pipeline such that the carrier body is positioned inside the first reinforcing body. The second inversion insertion step may be a step of inverting and inserting the second cylindrical body having the second reinforcing body into the inside of the first cylindrical body.

[0084] By doing so, the first and second reinforcing members are positioned at separate locations in the thickness direction, which increases the long-term flexural modulus of the lined pipe constructed by this lining method.

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

[0086] This way, one of the first and second cylindrical bodies does not need to be impregnated with uncured resin before inversion insertion, thus improving workability.

[0087] Furthermore, the lining material described above is used for lining pipelines and comprises a cylindrical carrier that holds an uncured resin and a cylindrical reinforcing body. The reinforcing body, on which the resin is not supported, is positioned on the outermost side, and the first cylindrical body is positioned in the conduit by inversion insertion, The present invention is characterized by comprising the support body impregnated with the aforementioned resin, which is positioned on the innermost side, and a second cylindrical body which is positioned inside the first cylindrical body by inversion insertion.

[0088] Furthermore, it is a lining material used for backing pipelines, comprising a cylindrical carrier that holds an uncured resin and a cylindrical reinforcing body, A first cylindrical body having at least one of the carrier and the reinforcing body is placed inside the conduit by inversion insertion, The invention may be characterized by comprising a second cylindrical body having at least the other of the carrier and the reinforcing body, and being positioned inside the first cylindrical body by inversion insertion.

[0089] With this lining material, the first cylindrical body and the second cylindrical body are inserted in reverse, making reverse insertion easy and improving workability.

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

[0091] By separating the first and second reinforcing members into a first cylindrical body and a second cylindrical body, inversion insertion becomes easier and workability is improved.

[0092] Furthermore, in this lining material, the support body may be positioned between the first reinforcing body and the second reinforcing body.

[0093] With this lining material, the first and second reinforcing members are positioned at separate locations, which increases the long-term flexural modulus of the lined pipe constructed using this lining material.

[0094] Furthermore, the lining pipe described above is a lining pipe placed inside a branch pipe that branches off from a main pipe buried underground. A cylindrical resin-cured layer formed by the curing of a cylindrical carrier that carries an uncured resin, A cylindrical outer reinforcing layer is disposed between the branch pipe and the resin curing layer and is made of a different material from the carrier, An airtight cylindrical airtight layer is positioned on the innermost part of this lining tube, The invention is characterized by comprising a cylindrical inner reinforcing layer disposed between the airtight layer and the resin curing layer, and made of a material different from the support body.

[0095] Here, a cylindrical outer airtight layer having airtightness may be provided, positioned between the branch pipe and the outer reinforcing layer. Furthermore, the inner reinforcing layer and the outer reinforcing body may be made of a material with higher strength than the carrier. Moreover, the inner reinforcing layer may be made of a material with higher strength than the outer reinforcing body.

[0096] With this lining tube, the outer reinforcing layer and the inner reinforcing layer are positioned at separate locations in the thickness direction, which can increase the long-term flexural modulus of the lining tube. Furthermore, because there is an airtight layer on the innermost side, water and gas passing through the internal space formed by this lining tube are prevented from seeping into the lining tube and reducing its lifespan. In addition, the resistance to the movement of solids passing through the internal space of this lining tube and the flow resistance of liquids passing through it can be reduced.

[0097] In recent years, high mechanical properties are required for lined pipes formed by pipeline repair using lining materials in order to function as self-supporting pipes. 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, to make the lined pipe function as a self-supporting pipe, it is particularly important to improve the long-term flexural modulus. To increase the long-term flexural modulus of the lined pipe, it is conceivable to use a lining material that has a reinforcing body in addition to the resin-bearing body. However, lining materials with reinforcing bodies have higher rigidity compared to those without reinforcing bodies, which makes it difficult to insert the lining material inverted, resulting in a problem of poor workability in pipeline repair.

[0098] The lining method described above is A lining method for backing a pipeline by installing a cylindrical carrier carrying an uncured resin and a cylindrical reinforcing body inside the pipeline, A first inversion insertion step involves inverting and inserting the first cylindrical body having the support into the conduit, The process includes a second inversion insertion step in which a second cylindrical body having the reinforcing body, which does not support the resin, is inverted and inserted into the inside of the first cylindrical body, and the first cylindrical body and the second cylindrical body are pressed toward the inner circumferential surface of the conduit, The second inversion insertion step is characterized by the step of permeating the resin supported on the carrier into the reinforcing body.

[0099] In this lining method, The first inversion insertion step is a step of inverting and inserting the first cylindrical body, in which an impermeable tube is arranged outside the reinforcing body, into the conduit. A removal step for removing the impermeable tube may be included between the first inversion insertion step and the second inversion insertion step.

[0100] Furthermore, the lining material described above is A lining material used for lining pipelines, comprising a cylindrical carrier that holds an uncured resin and a cylindrical reinforcing body, The support body bearing the aforementioned resin is positioned on the outermost side, and a first cylindrical body is positioned inside the conduit by inversion insertion, The present invention is characterized by comprising the reinforcing body, which does not support the aforementioned resin, positioned on the innermost side, and a second cylindrical body positioned inside the first cylindrical body by inverted insertion.

[0101] These lining methods and lining materials make it possible to provide a lining method that allows for easy inversion and insertion of a lining material equipped with a reinforcing body, and a lining material equipped with a reinforcing body that offers good workability. Furthermore, the lining tube described above is A lining pipe for repairing pipelines, A cylindrical resin-cured layer formed by the curing of a cylindrical carrier that carries an uncured resin, A cylindrical outer reinforcing layer is disposed between the conduit and the resin curing layer and is made of a different material from the carrier, An airtight cylindrical airtight layer is positioned on the innermost part of this lining tube, The airtight layer and the resin curing layer are disposed between them and a cylindrical inner reinforcing layer made of a different material from the carrier, The inner reinforcing layer is characterized by being made of a material with higher strength than the outer reinforcing layer. [Explanation of symbols]

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

Claims

[Claim 1] A lining pipe for repairing pipelines, A cylindrical resin-cured layer formed by the curing of a cylindrical carrier that carries an uncured resin, A cylindrical outer reinforcing layer is disposed between the conduit and the resin curing layer and is made of a material different from the support and having higher strength than the support, An airtight cylindrical airtight layer is positioned on the innermost part of this lining tube, The airtight layer and the resin curing layer are disposed between them and a cylindrical inner reinforcing layer made of a different material from the carrier, A lined tube characterized in that the inner reinforcing layer is made of a material with higher strength than the outer reinforcing layer.

Images