JP2004042277A - Method for repairing and reinforcing tubular liner, thermosetting resin tube and tubular inner layer - Google Patents

Abstract

Kind Code: A1 A collapsible thermosetting impregnated with a tubular liner and a resin, which has elasticity in the longitudinal direction and the radial direction, is extremely easy to be inverted and inserted into a pipe after impregnation with a resin, and does not wrinkle. A method for repairing and reinforcing a tubular resin layer and a tubular inner layer using these members.
A plurality of reinforcing fiber sheets forming a tubular liner are arranged at predetermined intervals in a circumferential direction of a fiber sleeve laminate and along a longitudinal axis direction of the fiber sleeve laminate. , Stitching S.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a tubular liner for use in lining the inner peripheral surface of an existing pipe to repair and reinforce a tubular body such as a water pipe and a sewer pipe, and a thermosetting resin that is impregnated with a resin and still has flexibility. The present invention also relates to a method for repairing and reinforcing the inner surface of a pipe using such a tubular liner and a thermosetting resin pipe.
[0002]
[Prior art]
Recently, in order to repair and reinforce existing pipes such as water pipes and sewer pipes buried underground, reversely insert and line a thermosetting resin pipe whose resin is not yet cured on the inner peripheral surface of the existing pipe. There is a reverse lining method.
[0003]
In this reversing lining method, as shown in FIG. 6, a long bag-like felt bag (tubular liner) 1 is impregnated with a thermosetting resin, and a thermosetting resin tube 1A still having flexibility is pressed by a water pressure P. In this method, the resin is inserted into the pipe 100 upside down, and then the water in the pipe is heated to cure the resin, thereby forming a cured resin pipe in the existing pipe 100.
[0004]
This reversal lining method has attracted attention because it can be constructed in a short period of time and is economical.
[0005]
The present inventors have proposed a tubular liner and a thermosetting resin tube which can be suitably used for the reverse lining method as described in JP-A-2001-347569. The configuration will be briefly described with reference to FIG.
[0006]
As shown in FIG. 8, the tubular liner 1 has an inner layer 2A formed of a long reinforcing fiber sheet 21A in which reinforcing fibers f are arranged in one direction, and a cylindrical film outer layer 3 arranged on the outer periphery of the inner layer 2A. And The inner layer 2A has a first fiber sleeve 21A in which the reinforcing fibers f are oriented at a predetermined angle α with respect to the longitudinal axis direction of the tubular liner 1, and the reinforcing fibers f have a predetermined strength with respect to the longitudinal axis direction of the tubular liner 1A. And the second fiber sleeve 21B oriented at an angle β.
[0007]
As shown in FIGS. 9 and 10, the long reinforcing fiber sheet 21 for forming the inner layer 2A of the tubular liner 1 is made of a reinforcing fiber layer 21a held by a resin-permeable support sheet 24. The reinforcing fiber layer 21a is arranged at a predetermined angle (α or β) with respect to the main axis, and substantially, that is, a predetermined predetermined angle except for the leading end and the trailing end of the continuous reinforcing fiber sheet 21. It is formed of reinforcing fibers f of long fibers having a length (F). The continuous reinforcing fiber sheet 21 in the sheet shape has not yet been impregnated with the matrix resin.
[0008]
The tubular liner 1 having the above-described configuration can reduce the thickness to avoid a decrease in the inner diameter of the tube, and can further increase the reinforcing strength, and can also be inverted and inserted into the tube after resin impregnation. It has features that work is extremely easy and that it does not wrinkle.
[0009]
[Problems to be solved by the invention]
However, as a result of further research and experiments performed by the present inventors, the tubular liner 1 having the above configuration provides many benefits as described above, but the resin-permeable support sheet 24 has a biaxial or It is made of a mesh-like body or cloth, such as triaxial, or a non-woven fabric, and is laminated on one or both sides of the reinforcing fiber layer 21a and heated and pressed, and the warp 25 and the weft 26 of the mesh-like support sheet 24 are made of reinforcing fibers. Since the tubular liner 1 is welded to the layer 21a, the stretchability in the longitudinal and radial directions of the tubular liner 1 is restrained by the support sheet 24, and the work of inserting the tubular liner 1 into the pipe, or The operation of reversing was sometimes difficult. In addition, in order to make the pipe liner fit exactly to the inner surface of the pipe without wrinkling, it is necessary to prepare the pipe liner 1 accurately in advance by fitting it to the pipe to be repaired and reinforced because the stretchability in the longitudinal and radial directions is poor. Was needed.
[0010]
Therefore, an object of the present invention is to have a tubular liner and resin impregnated in the longitudinal direction, which has elasticity in the radial direction, is extremely easy to invert and insert into a pipe after resin impregnation, and does not wrinkle. An object of the present invention is to provide a foldable thermosetting resin tube and a method for repairing and reinforcing a tubular inner layer using these members.
[0011]
[Means for Solving the Problems]
The above object is achieved by a tubular liner and a thermosetting resin tube according to the present invention. In summary, according to the first invention, in a tubular liner having a fiber sleeve laminate formed by laminating a plurality of long reinforcing fiber sheets in which reinforcing fibers are arranged in one direction,
The plurality of reinforcing fiber sheets are integrated by stitching at predetermined intervals in a circumferential direction of the fiber sleeve laminate, and along a longitudinal axis direction of the fiber sleeve laminate. Is provided. According to one embodiment, the reinforcing fibers of each of the reinforcing fiber sheets are oriented at different angles with respect to a longitudinal axis direction of the fiber sleeve laminate. According to another embodiment, a nonwoven fabric, felt or glass cloth layer is arranged on the inner and / or outer peripheral side of the fiber sleeve laminate. According to another embodiment, the nonwoven fabric, felt or glass cloth layer disposed on the inner peripheral side and / or the outer peripheral side of the fiber sleeve laminate is bonded or stitched to the whole or part of the fiber sleeve laminate. Are integrated with each other. According to yet another embodiment, the outermost periphery of the tubular liner has a cylindrical film outer layer.
[0012]
According to a second aspect of the present invention, there is provided a foldable thermosetting resin tube, wherein the tubular liner is impregnated with a thermosetting resin.
[0013]
According to a third aspect of the present invention, there is provided a method of repairing and reinforcing a tubular inner layer, comprising attaching the tubular liner to an inner peripheral surface of a tubular body. Further, the tubular liner is drawn into the inner surface of the tubular body, and then the resin impregnated felt is inserted into the inner peripheral side of the fiber sleeve laminate while inverting, and the fibrous sleeve laminate is attached to the inner peripheral surface of the tubular body. can do.
[0014]
According to a fourth aspect of the present invention, there is provided a method for repairing and reinforcing a tubular inner layer, comprising inserting the above-mentioned tubular liner into the pipe while inverting the pipe, and attaching the fiber sleeve laminate to the inner peripheral surface of the tubular body. Is done.
[0015]
According to the fifth invention, a plurality of long reinforcing fiber sheets in which reinforcing fibers are arranged in one direction are laminated to form a reinforcing fiber sheet laminate, and this reinforcing fiber sheet laminate is At a predetermined interval in the width direction of the body, and further integrated by stitching along the longitudinal direction, thereafter, both ends along the longitudinal direction are joined together to produce a tubular liner, and the tubular liner is impregnated with resin. A method for repairing and reinforcing a tubular inner layer is provided, which is adapted to an inner surface of a tubular body.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the tubular liner, the thermosetting resin tube, and the method of repairing and reinforcing the tubular inner layer according to the present invention will be described in more detail with reference to the drawings.
[0017]
Example 1
FIG. 1 shows an embodiment of a tubular liner 1 adapted to the inner surface of a tubular body such as a water pipe or a sewer pipe according to the present invention. The tubular liner 1 of the present invention has a fiber sleeve laminate 2A. Further, as described later in detail, a resin cylindrical film outer layer 3 can be disposed on the outer periphery of the fiber sleeve laminate 2A, and the insulating material layer 4 is disposed on the inner periphery of the fiber sleeve laminate 2A. can do.
[0018]
In the present embodiment, the fiber sleeve laminate 2A is composed of a first fiber sleeve 21A in which the reinforcing fibers f are oriented at a predetermined angle α with respect to the longitudinal axis direction of the tubular liner 1, and a reinforcing fiber f formed by the tubular liner. And a second fiber sleeve 22A oriented at a predetermined angle β with respect to one longitudinal axis direction. The reinforcing fiber orientation angles α and β can be any angles, but are different from each other in order to effectively exert a reinforcing effect on bending force, and in particular, + 30 ° to 90 ° or −30 ° to −90 °. Is preferred. For example, α = + 45 ° and β = −45 °.
[0019]
In the first embodiment shown in FIG. 1, the fiber sleeve laminate 2A has been described as having the first and second fiber sleeves 21A and 22A. However, as shown in FIG. For example, the fiber sleeve laminate 2A may further include a fiber sleeve 23A in which the reinforcing fibers are arranged in the circumferential direction, that is, the fiber sleeve 23A in which the orientation angle (α) of the reinforcing fibers is 90 °. In the case of the second embodiment, the reinforcing effect on the hoop force of the existing pipe after reinforcement can also be increased.
[0020]
Further, in another embodiment, the fiber sleeve laminate 2A may have other third and fourth fiber sleeves (not shown) similar to the first and second fiber sleeves 21A and 22A. The fiber orientation angles of the third and fourth fiber sleeves can be the same as those of the first and second fiber sleeves 21A and 22A, or can be different. The reinforcing fiber orientation angle mode is not limited to those described above, and various modes can be adopted as necessary.
[0021]
Another embodiment of the present invention is shown in FIG. As described above, according to the present invention, the fiber sleeve laminate 2A has a plurality of fiber sleeves 21A to 23A in which the reinforcing fibers f are arranged, but as shown in FIG. The felt layers 2M (2M ₁ , 2M ₂ ) may be arranged on the inner and outer peripheral sides of 2A, respectively. Of course, either of the felt layers 2M ₁ and 2M ₂ can be eliminated. The felt layer _2M 1, 2M _2, as in the prior art, polyester felt can be used.
[0022]
According to the present invention, since the reinforcing strength is greatly increased by having the fiber sleeve laminate 2A in which the reinforcing fibers f are arranged in one direction, the felt layers 2M ₁ and 2M ₂ are compared with the related art. Can be greatly reduced, for example, about 50 to 100%. By reducing the thickness of the felt layer, it is possible to avoid a decrease in the inner diameter of the tube. Further, the inversion and insertion work into the pipe after the resin impregnation becomes easy.
[0023]
Next, an embodiment of a long reinforcing fiber sheet laminate 2 for forming the fiber sleeve laminate 2A of the tubular liner 1 of the present invention will be described with reference to FIG. The reinforcing fiber sheet laminate 2 has a continuous predetermined length (L). Usually, the length is, for example, 50 m to 100 m.
[0024]
In this embodiment, the continuous reinforcing fiber sheet laminate 2 has a first reinforcing fiber sheet 21 and a second reinforcing fiber sheet 22. The first reinforcing fiber sheet 21 is arranged at a predetermined angle (α) with respect to the main axis, and the second reinforcing fiber sheet 22 is arranged at a predetermined angle (β) with respect to the main axis. That is, the continuous reinforcing fiber sheet laminate 2 is formed of long fiber reinforcing fibers f having a predetermined length (F) except for the leading end and the trailing end. The matrix resin has not yet been impregnated into the sheet-shaped continuous reinforcing fiber sheet laminate 2.
[0025]
In the present specification, “main axis” means an axis along the longitudinal direction of the continuous reinforcing fiber sheet 21.
[0026]
According to the present invention, the first reinforcing fiber sheet 21 and the second reinforcing fiber sheet 22 are integrated by stitching S along the longitudinal direction of the reinforcing fiber sheet laminate 2. The width interval (s1) between the stitches S in the width direction of the reinforcing fiber sheet laminate 2 is 3 to 30 mm. The feed (s2) of the stitching S is set to about 2 to 10 mm.
[0027]
The stitching S generally uses a polyester thread, but may use cotton, nylon, vinylon, glass fiber, or the like.
[0028]
More specifically, the stitching S is for stitching in which several tens to several hundred fibers arranged in a sheet shape continuously oriented at + 45 °, −45 °, etc. are arranged in the sheet width direction. Sewing is continuously performed in the longitudinal direction of the sheet with the needle and the stitch thread, and two or several layers of the oriented fibrous material are integrated with the stitch thread. The stitching S may be a chain stitch as shown or a zigzag tricot stitch.
[0029]
The continuous reinforcing fiber sheet laminate 2 of the present embodiment has a predetermined width (W) according to the desired pipe diameter of the fiber sleeve laminate 2A of the tubular liner 1. That is, when the reinforcing fiber sheet laminate 2 is formed into the fiber sleeve laminate 2A, the stitching width interval (s1) is an appropriate predetermined interval in the circumferential direction of the sleeve.
[0030]
In the present embodiment, the reinforcing fibers f constituting the reinforcing fiber sheets 21 and 22 are carbon fibers, glass fibers, or organic fibers such as aramid, PBO (polyparaphenylene benzobisoxazole), polyamide, polyarylate, and polyester. Further, one kind of steel fiber or a plurality of kinds of steel fibers can be used. The fiber basis weight of the reinforcing fiber sheets 21 and 22 is 50 to 600 g / m ² .
[0031]
As the felt layers 2M ₁ and 2M ₂ used in the fiber sleeve laminate 2A of the embodiment of FIG. 3, polyester felt can be used as in the conventional case. Such felt layers 2M ₁ and 2M ₂ can also be integrated with the reinforcing fiber sheet laminate 2 by stitching.
[0032]
For example, in FIGS. 1 and 2, in the case of the tubular liner 1 using carbon fibers as the reinforcing fibers 24 of the fiber sleeves 21 </ b> A and 22 </ b> A, the pipes have carbon fibers after being applied to the existing pipe 100 by the reverse lining method. The fiber sleeve 22 </ b> A directly adheres to the inner surface of the existing pipe 100. Since carbon fibers are conductive, it is conceivable that the existing pipe 100 is corroded due to electrolytic corrosion due to long-term use, thereby reducing the reinforcing effect.
[0033]
Therefore, it is preferable to provide the insulating material layer 4 as the innermost layer of the fiber sleeve laminate 2A, as shown by the dashed line in FIG. For the insulating material layer 4, any insulating material can be used, but glass cloth, scream cloth or glass nonwoven fabric can be suitably used.
[0034]
Of course, when the tubular liner shown in FIGS. 1 and 2 is directly fitted to the inner surface of the existing pipe 100, and the fiber sleeve 21A using carbon fiber directly adheres to the inner surface of the existing pipe 100, the fiber sleeve is used. As the outer layer of 21A, the insulating material layer 4 can be provided instead of the film outer layer 3.
[0035]
These inner and outer insulating layers 4 can also be integrated with the reinforcing fiber sheet laminate 2 by stitching.
[0036]
Example 2
Next, a method for producing the fiber sleeve laminate 2A using the long reinforcing fiber sheet laminate 2 will be described.
[0037]
The continuous reinforcing fiber sheet laminate 2 having the configuration shown in FIG. 4 described in Example 1 is cut into a predetermined length, and as shown in FIG. 5, along the longitudinal direction of the mandrel 60 having a predetermined diameter. The main axis of the reinforcing fiber sheet laminate 2 is aligned, wrapped around the surface of the mandrel, wrapped in the circumferential direction by a length (R), for example, 100 mm, and the wrapped portion is stitched in the length direction to have a predetermined pipe diameter. The laminated fiber sleeve 2A is manufactured.
[0038]
The outer peripheral portion of the fiber sleeve laminate 2A is coated with a cylindrical resin film, or a resin film tape is spirally wound to form a cylindrical film outer layer 3 as an outer layer of the fiber sleeve laminate 2A. be able to.
[0039]
If carbon fibers are used as the reinforcing fibers f of the fiber sleeves 21A and 22A, first, for example, a glass cloth sheet is wound around the mandrel to form the insulating material layer 4, and then the fiber sleeve is formed as described above. The laminate 2A and the cylindrical film outer layer 3 are formed. Of course, when the insulating material layer 4 is integrated with the fiber sleeves 21A and 22A by stitching, the step of winding the glass cloth sheet around the mandrel is omitted.
[0040]
Example 3
In the tubular liner 1 manufactured as described above, the thermosetting resin is usually impregnated into the fiber sleeve laminate 2 in a state where it is folded in a flat state. Thereby, the thermosetting resin is impregnated into the fiber sleeve laminate 2 including the fiber sleeves 21A and 22A, the felt layer 2M, and the like, and the thermosetting resin tube 1A is manufactured.
[0041]
When the resin film outer layer 3 is provided around the outer periphery of the thermosetting resin tube 1A, the matrix resin does not leak to the outside during the resin impregnation, and the resin impregnation process is performed efficiently.
[0042]
The resin-impregnated tubular liner 1, that is, the thermosetting resin tube 1A is stored in a cool box or the like so that the resin is not cured, and is transported to the site. The thermosetting resin pipe 1A still having flexibility is inserted into the existing pipe 100 in a flat state as in the conventional case shown in FIG. Attached to such as.
[0043]
Next, as shown in FIG. 6, the thermosetting resin pipe 1A is continuously and invertedly inserted into the pipe 100 by the water pressure P, and the fiber sleeve laminate 2A portion of the tubular liner 1 comes into close contact with the inner wall of the existing pipe. . After that, the water in the tube is heated to cure the resin, and a cured resin tube is formed in the existing tube 100.
[0044]
According to the present invention, the fiber sleeve laminate 2A is formed of long, for example, fiber sleeves 21A and 22A in which the reinforcing fibers f are arranged in one direction, and each of the fiber sleeves 21A and 22A has a longitudinal direction. , The elasticity in the longitudinal direction and the radial direction is large, and when the fiber is inserted into the existing pipe 100 and the reversing operation is performed, the reinforcing fiber f in each of the fiber sleeves 21A and 22A becomes , Can be relatively freely moved, so that the reversing operation can be performed extremely smoothly and wrinkles are unlikely to occur.
[0045]
As another method for reinforcing and repairing the existing pipe 100, as shown in FIG. 7, the uncured tubular liner 1A impregnated with resin is first drawn into the inner surface of the pipe 100, and then the inner periphery of the tubular liner 1A is removed. The tubular liner 1A and the resin-impregnated felt 2M can be attached to the inner peripheral surface of the tube 100 by inserting the resin-impregnated felt 2M into the tube 100 while inverting it.
[0046]
If a plurality of tubular liners are to be adhered to the inner surface of the tube 100, if the longitudinal and radial stretchability is not particularly required, the reinforcing fiber laminate integrated by stitching according to the present invention In addition to providing the tubular liner 2A according to 2, a conventional one-way reinforced fiber sheet having low elasticity as shown in FIGS. 9 and 10 or a tubular liner made using a woven sheet is used. It is good also as composition which also has.
[0047]
Performance test Next, the performance of the thermosetting resin tube 1A of the present invention will be described.
[0048]
Using the continuous reinforcing fiber sheet laminate 2 shown in FIG. 4 described in Example 1, the tubular liner 1 shown in FIG. 1 was prepared and impregnated with resin to obtain a thermosetting resin tube 1A.
[0049]
In the continuous reinforcing fiber sheet laminate 2 used in this test, the reinforcing fiber sheets 21 and 22 were arranged at a fiber weight of 200 g / m ² using PAN-based carbon fiber strands having an average diameter of 7 μm and a convergence number of 12,000. Then, both reinforcing fiber sheets 21 and 22 were integrated by stitching using a polyester yarn as a yarn. At this time, the stitching was performed by a chain stitch, the stitching width interval (s1) was 5 mm, and the feed (s2) was 5 mm.
[0050]
The long reinforcing fiber sheet laminate 2 produced in this manner had a width (W) of 740 mm, a length (L) of 50 m, and an angle of 45 ° with respect to the main axis of the reinforcing fibers. Using this reinforcing fiber sheet 21, a fiber sleeve laminate 2A was produced in the mode shown in FIG. The reinforcing fiber orientation angles of the fiber sleeve laminate 2A were α = + 45 ° and β = −45 °.
[0051]
A 200 μm-thick vinyl chloride resin film was wound around and bonded to the outside of the fiber sleeve laminate 2A to form a cylindrical film outer layer 3.
[0052]
The inner diameter of the tubular liner 1 thus obtained was 201.4 mm, the outer diameter was 204.0 mm, and the length was 50 m.
[0053]
This tubular liner 1 was impregnated with an epoxy resin to obtain a thermosetting resin tube 1A. The resin amount in the fiber sleeve laminate 2A was 1065 g / m ² .
[0054]
As a comparative example, using the continuous reinforcing fiber sheet 21 shown in FIG. 9, the tubular liner 1 shown in FIG. 8 was produced, and was impregnated with resin to obtain a thermosetting resin tube 1A.
[0055]
The material and specifications of the reinforcing fiber sheet 21 were the same as those of the present embodiment. The fiber sleeves 21A and 21B were made of the reinforced fiber sheet 21 having the same configuration except that the orientation angles were α = + 45 ° and β = −45 °.
[0056]
Further, the reinforcing fiber layer was held by a mesh-like support sheet 23 which was a biaxial mesh-like body using glass fibers (300d, count of 1/10 mm) as warp yarns 25 and weft yarns 26. The interval (w1, w2) between the yarns of the biaxial mesh body was 10 mm.
[0057]
The warp yarn 25 and the weft yarn 26 of the mesh-like support sheet 23 were impregnated with a thermoplastic resin at a content of 80% by weight.
[0058]
Resin curing of a thermosetting resin tube 1A using the reinforcing fiber sheet laminate 2 of the present invention and a thermosetting resin tube 1A of a comparative example using the reinforcing fiber sheet 21 held on the mesh-like support sheet 23. The mechanical properties of the resin tube afterwards were examined, and it was found that the thermosetting resin tube 1A of the present invention exhibited the same mechanical properties of the resin tube after resin curing as the comparative example.
[0059]
In the evaluation of workability, the case where the thermosetting resin pipe 1A using the reinforced fiber sheet laminate 2 of the present invention was used showed less wrinkles and a shorter work time than the comparative example. And found it to be excellent.
[0060]
【The invention's effect】
As described above, the tubular liner and the thermosetting resin pipe of the present invention, and the method of replenishing and reinforcing the pipe using the same, are characterized in that the plurality of reinforcing fiber sheets forming the tubular liner are formed around the circumference of the fiber sleeve laminate. At predetermined intervals in the direction, and along the longitudinal axis direction of the fiber sleeve laminate, it is integrated by stitching, so it has elasticity in the longitudinal direction and radial direction, and is also used for repair and reinforcement of pipes Inversion and insertion into the pipe after resin impregnation are extremely easy and wrinkles are less generated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a tubular liner according to the present invention.
FIG. 2 is a perspective view showing another embodiment of the tubular liner according to the present invention.
FIG. 3 is a perspective view showing another embodiment of the tubular liner according to the present invention.
FIG. 4 is a perspective view showing one embodiment of a continuous reinforcing fiber sheet laminate according to the present invention.
FIG. 5 is a diagram illustrating an embodiment of the method for producing a tubular liner of the present invention.
FIG. 6 is a diagram illustrating a reverse lining method.
FIG. 7 is a diagram illustrating another lining method.
FIG. 8 is a perspective view showing an example of a conventional tubular liner.
FIG. 9 is a perspective view showing an example of a conventional continuous reinforcing fiber sheet.
FIG. 10 is an exploded perspective view of the conventional continuous reinforcing fiber sheet of FIG.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 tubular liner 1A thermosetting resin tube 2 reinforced fiber sheet laminate 2A fiber sleeve laminate 2M (2M ₁ , 2M ₂ ) felt layer 3 cylindrical film outer layers 21, 22 reinforced fiber sheets 21A, 22A, 23A fiber sleeve

Claims (14)

In a tubular liner having a fiber sleeve laminate formed by laminating a plurality of long reinforcing fiber sheets in which reinforcing fibers are arranged in one direction,
The plurality of reinforcing fiber sheets are integrated by stitching at predetermined intervals in a circumferential direction of the fiber sleeve laminate, and along a longitudinal axis direction of the fiber sleeve laminate. And a tubular liner. The tubular liner of claim 1, wherein the reinforcing fibers of each of the reinforcing fiber sheets are oriented at different angles with respect to a longitudinal axis direction of the fiber sleeve laminate. The tubular liner according to claim 2, wherein the orientation angle of the reinforcing fibers is +30 to 90 or -30 to -90. The tubular liner according to any one of claims 1 to 3, wherein a nonwoven fabric, a felt, or a glass cloth layer is disposed on an inner peripheral side and / or an outer peripheral side of the fiber sleeve laminate. The nonwoven fabric, felt or glass cloth layer disposed on the inner peripheral side and / or outer peripheral side of the fiber sleeve laminate is that the whole or a part thereof is integrated with the fiber sleeve laminate by bonding or stitching. 5. The tubular liner of claim 4, wherein: The tubular liner according to any one of claims 1 to 5, further comprising a cylindrical film outer layer on the outermost periphery of the tubular liner. The reinforcing fibers forming the reinforcing fiber sheet include carbon fibers, glass fibers, organic fibers such as aramid, PBO (polyparaphenylene benzobisoxazole), polyamide, polyarylate, polyester, and further, steel fibers and the like. The tubular liner according to any one of claims 1 to 6, wherein a mixture of a plurality of types is used. The fiber basis weight of the reinforcing fiber sheet, the tubular liner according to any one of claims 1-7, characterized in that a 50~600g / m ^2. A foldable thermosetting resin tube, wherein the tubular liner according to any one of claims 1 to 8 is impregnated with a thermosetting resin. 10. The thermosetting resin tube according to claim 9, wherein the thermosetting resin is an epoxy resin, a phenol resin, an unsaturated polyester resin, a vinyl ester resin, a polyimide resin, or an acrylic resin. A method for repairing and reinforcing a tubular inner layer, comprising attaching the tubular liner according to any one of claims 1 to 5 to an inner peripheral surface of a tubular body. Pulling the tubular liner into the inner surface of the tubular body, then inserting the resin-impregnated felt into the inner peripheral side of the fiber sleeve laminate while inverting, and attaching the fiber sleeve laminate to the inner peripheral surface of the tubular body. The method for repairing and reinforcing a tubular inner layer according to claim 11, wherein: A method for repairing and reinforcing a tubular inner layer, comprising inserting the tubular liner according to claim 6 into a pipe while inverting the pipe, and attaching the fiber sleeve laminate to an inner peripheral surface of the tubular body. A plurality of long reinforcing fiber sheets in which reinforcing fibers are arranged in one direction are laminated to form a reinforcing fiber sheet laminate, and the reinforcing fiber sheet laminate is formed at predetermined intervals in a width direction of the reinforcing fiber sheet laminate. In addition, they are integrated by stitching along the longitudinal direction, and thereafter, both ends along the longitudinal direction are joined to each other to produce a tubular liner, and the tubular liner is impregnated with a resin and conforms to the inner surface of the tubular body A method for repairing and reinforcing a tubular inner layer.

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