JP7368979B2 - Reinforcement structure and method for reinforcing tubular members - Google Patents

Description

The present invention relates to a reinforcing structure for a tubular member and a method for reinforcing a tubular member.

Pipelines are installed for the purpose of, for example, draining the lower parts of roads and railroad tracks. In recent years, many pipelines have deteriorated due to corrosion over time, and repairs and reinforcement are being implemented. As a technique for repairing and reinforcing such pipelines, for example, Patent Document 1 discloses that a hollow frame-like reinforcing body is assembled inside the existing pipeline using a reinforcing member provided with a fitting recess, and a plurality of reinforcing members are assembled inside the existing pipeline. By attaching a fitting member to each of the fitting recesses and fitting a plurality of inner surface members to the fitting members, the inner surface is assembled into a cylindrical shape along the length direction of the existing pipe. Techniques are described for injecting a curable filler into the void between a member and the interior surface of an existing conduit. Furthermore, Patent Document 2 describes a method for repairing only the deteriorated portion at the bottom of the conduit, in which, in an invert panel installed at the bottom of the conduit, an invert panel that extends continuously in the longitudinal direction on the back surface of the long panel main body is disclosed. A technique for integrally molding the ribs is described.

Japanese Patent Application Publication No. 2009-085004 Japanese Patent Application Publication No. 2001-336208

However, in the case of the technology described in Patent Document 1, reinforcing bodies are placed inside the entire circumference of the existing pipe regardless of the part where deterioration occurs, so for example, only the lower part of the pipe is corroded due to poor drainage. In such cases, it was uneconomical. Furthermore, when injecting the curable filler into the gap between the existing pipe line and the reinforcing body, it is not easy to check the filling status. In addition, in the case of the technology described in Patent Document 2, only the deteriorated part at the bottom of the pipe is repaired, but the ribs integrally formed on the back surface of the long panel body have an anchor effect for the backfilling material. Since it is intended to increase the ductility, it does not have the effect of compensating for the decrease in cross-sectional rigidity and strength due to deterioration of the conduit.

Therefore, the present invention provides a reinforcing structure and a method for reinforcing a tubular member, which are capable of repairing only the degraded portion of the tubular member and can compensate for the decrease in rigidity and strength due to deterioration of the tubular member. The purpose is to

According to one aspect of the present invention, there is provided a reinforcing structure for a tubular member including a reinforcing member attached to the inner peripheral surface of the tubular member at a deteriorated portion of the tubular member, the reinforcing member being attached to a part of the tubular member in the circumferential direction. A reinforcing structure for a tubular member is provided, which is installed and formed into a wave shape in a cross section including an extension direction and a radial direction of the tubular member.

According to another aspect of the present invention, there is provided a reinforcing structure for a tubular member including a reinforcing member attached to the inner circumferential surface of the tubular member at a deteriorated portion of the tubular member, the reinforcing member comprising a portion of the tubular member in the circumferential direction. A reinforcing structure for a tubular member is provided, characterized in that it includes a rib that is installed in the tubular member and protrudes radially outward of the tubular member in a cross section including the extension direction and the radial direction of the tubular member.

In the reinforcing structure for the tubular member described above, the reinforcing member may be made of a highly corrosion-resistant material. Further, a curable filler may be filled in the gap between the inner circumferential surface of the tubular member and the reinforcing member. The reinforcing member may be joined to the inner circumferential surface of the tubular member at a non-degraded portion around the deteriorated portion. The reinforcing structure of the tubular member includes a tension member that is brought into contact with at least one end of the reinforcing member in the circumferential direction of the tubular member and an inner circumferential surface of a non-degraded portion of the tubular member to which the reinforcing member is not attached. It may further include. The tension member adjusts the distance in the circumferential direction of the tubular member between the first end that abuts the end of the reinforcing member and the second end that abuts the inner circumferential surface of the non-deteriorating portion. It may also include a telescoping mechanism that is capable of retracting.

According to still another aspect of the present invention, there is provided a method for reinforcing a tubular member whose extension direction is substantially horizontal using the above-mentioned reinforcing structure for a tubular member, the method comprising reinforcing the reinforcing member inside the tubular member. A method for reinforcing a tubular member is provided, which includes the steps of transporting the reinforcing member into the tubular member, placing the reinforcing member on the inner peripheral surface of the tubular member including the deteriorated portion, and fixing the reinforcing member to the tubular member. The reinforcing method may further include, after fixing the reinforcing member to the tubular member, filling a gap between the inner peripheral surface of the tubular member and the reinforcing member with a curable filler. In this case, the reinforcing method may further include the step of determining completion of filling with the curable filler based on the curable filler overflowing from the end of the reinforcing member in the circumferential direction of the tubular member.

According to still another aspect of the present invention, there is provided a method for reinforcing a tubular member using the above-mentioned reinforcing structure for a tubular member, comprising: carrying a reinforcing member into the inside of the tubular member; Provided is a method for reinforcing a tubular member, which includes the steps of temporarily fixing a reinforcing member to the inner circumferential surface of the tubular member including a degraded portion, and fixing a reinforcing member to the tubular member. The step of fixing the reinforcing member includes applying a tensioning member that is brought into contact with at least one end of the reinforcing member in the circumferential direction of the tubular member and the inner peripheral surface of the non-degraded portion of the tubular member to which the reinforcing member is not attached. It may also include a step of arranging the member. Alternatively, the step of temporarily fixing the reinforcing member may include contacting at least one end of the reinforcing member in the circumferential direction of the tubular member and the inner circumferential surface of a non-degraded portion of the tubular member to which the reinforcing member is not attached. The reinforcing method may further include the step of removing the tension member after the step of fixing the reinforcing member to the tubular member.

According to the above configuration, it is possible to repair only the deteriorated portion of the tubular member, and since corrugations and ribs are formed in the cross section including the extension direction and radial direction of the tubular member, it is possible to repair the deteriorated part of the tubular member. It can compensate for the decrease in strength.

1 is a diagram showing an example of a tubular member to which a reinforcing structure according to an embodiment of the present invention is applied. 1 is a diagram showing an example of a tubular member to which a reinforcing structure according to an embodiment of the present invention is applied. 1 is a cross-sectional view of a reinforcing structure according to an embodiment of the present invention. 1 is a longitudinal cross-sectional view of a reinforcing structure according to a first embodiment of the present invention. It is a longitudinal cross-sectional view of the reinforcement structure concerning the modification of the 1st embodiment of the present invention. FIG. 7 is a longitudinal cross-sectional view of a reinforcing structure according to a second embodiment of the present invention. It is a longitudinal cross-sectional view of the reinforcement structure concerning the modification of the 2nd embodiment of the present invention. It is a figure for explaining another example of the fixing method of the reinforcing member in an embodiment of the present invention. It is a figure for explaining another example of the fixing method of the reinforcing member in an embodiment of the present invention. It is a figure for explaining another example of the fixing method of the reinforcing member in an embodiment of the present invention. It is a figure for explaining the example of the carrying-in method of the reinforcing member in embodiment of this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that, in this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals and redundant explanation will be omitted.

(Reinforcement structure of tubular member)
FIGS. 1 and 2 are diagrams showing examples of tubular members to which reinforcing structures according to embodiments of the present invention are applied. As shown in the respective figures, the reinforcing structure includes a reinforcing member 2 attached to the inner circumferential surface of the tubular member 1 at the degraded portion 1D of the tubular member 1. For example, the tubular member 1 may be arranged so that the extension direction is substantially horizontal as in the example shown in FIG. may be arranged in a substantially vertical direction (shaft, water collection well, aggregate bin, etc.). In the following explanation, a cross section (a cross section perpendicular to the extension direction of the tubular member 1) is a section along the line AA shown in FIGS. 1 and 2, and a longitudinal section (an extension direction of the tubular member 1) The cross section (including the direction and the radial direction) is a cross section taken along the line BB shown in FIGS. 1 and 2.

FIG. 3 is a cross-sectional view of a reinforcing structure according to an embodiment of the present invention. As illustrated, the reinforcing member 2 is installed in a part of the tubular member 1 in the circumferential direction including the degraded portion 1D. The reinforcing member 2 is made of, for example, steel or resin, and steel is preferable in terms of workability and cost. When using a steel material, the reinforcing member 2 after repair can be made of a highly corrosion-resistant material such as a stainless steel plate, a hot-dip zinc-aluminum-magnesium alloy plated steel plate, a thick-film plated steel plate, or a thick-film coated steel plate. It is possible to suppress aging deterioration of the tubular member 2 and maintain the function of the tubular member 1 over a long period of time.

Further, in the example shown in FIG. 3, the reinforcing member 2 is a non-deteriorated portion around the deteriorated portion 1D, and is joined to the inner circumferential surface 1S of the tubular member 1 using a one-side bolt 3. In addition to the one-side bolt 3, the reinforcing member 2 may be joined to the inner circumferential surface 1S of the tubular member 1 using other fastening parts such as drill screws, welding, adhesive, or the like. By joining the reinforcing member 2 to the inner circumferential surface 1S of the tubular member 1 at the non-deteriorating portion, the tubular member 1 and the reinforcing member 2 behave as one against external forces such as earth pressure, and the reinforcing member 2 This can effectively compensate for the decrease in rigidity and strength due to deterioration of the tubular member 1. Hereinafter, two examples of the longitudinal cross-sectional configuration of the reinforcing member 2 will be described as a first embodiment (reinforcing member 2A) and a second embodiment (reinforcing member 2B).

FIG. 4 is a longitudinal sectional view of the reinforcing structure according to the first embodiment of the present invention. In the illustrated example, the reinforcing member 2A is formed in a corrugated shape, that is, a wave shape, in a longitudinal section. Since the waveform of the reinforcing member 2A constitutes an uneven portion extending along the circumferential direction of the tubular member 1, the rigidity and strength of the tubular member 1 are improved by joining the reinforcing member 2A. In the degraded portion 1D, the rigidity and strength of the tubular member 1 have decreased due to a decrease in plate thickness due to corrosion, etc., but the decrease in rigidity and strength of the tubular member 1 can be compensated for by attaching the reinforcing member 2A to the deteriorated portion 1D. I can do it. In the illustrated example, since the tubular member 1 is straight, the reinforcing member 2A is joined to the inner circumferential surface 1S using a one-side bolt 3 or the like at a portion corresponding to the trough of the waveform of the reinforcing member 2A.

In the above example, as illustrated, the gap between the reinforcing member 2A and the inner peripheral surface 1S of the tubular member 1 may be filled with a hardening filler 4 such as concrete or mortar. By filling the curable filler 4, the deteriorated portion 1D of the tubular member 1 can be effectively stiffened and reinforced by both the reinforcing member 2A and the curable filler 4. Further, by covering the deteriorated portion 1D with the hardening filler 4, water and air will not flow into the deteriorated portion 1D from the inside of the tubular member 1, so that the progress of corrosion in the deteriorated portion 1D can be suppressed. Furthermore, when filling the gap between the reinforcing member 2A and the inner circumferential surface 1S with the curable filler 4, the reinforcing member 2A is joined to the inner circumferential surface 1S of the tubular member 1 using a one-side bolt 3 or the like. By doing so, it is possible to prevent the reinforcing member 2A from lifting or rotating during filling with the curable filler 4.

FIG. 5 is a longitudinal sectional view of a reinforcing structure according to a modification of the first embodiment of the present invention. In the illustrated example, a reinforcing member 2A similar to the example of FIG. 4 is attached to the inner circumferential surface 1S of the tubular member 1C at a degraded portion 1D of the tubular member 1C, which is formed in a corrugated, ie, corrugated, longitudinal section. Similar to the example of FIG. 4, the reinforcing member 2A compensates for the decrease in rigidity and strength of the tubular member 1C in the degraded portion 1D. Furthermore, by matching the pitch and depth of the waveforms of the tubular member 1C and the reinforcing member 2A, the reinforcing member 2A can be placed overlapping the waveform of the tubular member 1C. In this case, in the extending direction of the tubular member 1C, the position of the reinforcing member 2A relative to the tubular member 1C can be fixed by fitting the corrugations together, which facilitates construction.

FIG. 6 is a longitudinal cross-sectional view of a reinforcing structure according to a second embodiment of the present invention. In the illustrated example, the reinforcing member 2B includes ribs 21 that protrude radially outward of the tubular member 1 in the longitudinal section. Since the ribs 21 of the reinforcing member 2B constitute a convex portion extending along the circumferential direction of the tubular member 1, the rigidity and strength of the tubular member 1 are improved by joining the reinforcing member 2B, for example, as shown in FIG. By attaching the reinforcing member 2B as in the example, it is possible to compensate for the decrease in rigidity and strength of the tubular member 1 due to deterioration. In the illustrated example, since the tubular member 1 is straight, a rising portion 22 is formed in the reinforcing member 2B to form a space from which the ribs 21 protrude, and the reinforcing member 2B is formed in the portion facing the deteriorated portion 1D. is spaced apart from the inner circumferential surface 1S of the tubular member 1. In this portion, the gap between the reinforcing member 2B and the inner circumferential surface 1S of the tubular member 1 may be filled with the curable filler 4 as in the example of FIG.

FIG. 7 is a longitudinal sectional view of a reinforcing structure according to a modification of the second embodiment of the present invention. In the illustrated example, the reinforcing member 2C including the ribs 21 is formed on the inner circumferential surface 1S of the tubular member 1C at the degraded portion 1D of the tubular member 1C, which is formed in a corrugated shape, that is, in a corrugated shape in the longitudinal section, as in the example of FIG. can be attached to. Similar to the example of FIG. 6, the reinforcing member 2C compensates for the decrease in rigidity and strength of the tubular member 1C in the degraded portion 1D. In addition, by matching the arrangement interval of the ribs 21 to the pitch of the waveform of the tubular member 1C, and the height of the rib 21 to the depth of the waveform of the tubular member 1C, the reinforcing member 2C can be made to have the shape shown in the example of FIG. Even without forming a rising part, the reinforcing member 2C is joined to the inner circumferential surface 1S using a one-side bolt 3 at the part corresponding to the crest of the waveform of the tubular member 1C, and the inner part is joined to the inner peripheral surface 1S at the part corresponding to the trough of the waveform of the tubular member 1C. The rib 21 can be made to protrude into the space formed between the peripheral surface 1S and the reinforcing member 2C.

8 to 10 are diagrams for explaining another example of the method of fixing the reinforcing member in the embodiment of the present invention. In the example shown in the cross-sectional views of the tubular member 1 in FIGS. 8 and 9, the reinforcing member 2 (the reinforcing member 2A in the first embodiment, or the reinforcing members 2B and 2C in the second embodiment) is , is fixed using tension members 5A and 5B which are respectively brought into contact with the end portion 2E of the reinforcing member 2 and the inner circumferential surface 1S of the non-degraded portion of the tubular member 1 to which the reinforcing member 2 is not attached.

In the example shown in FIG. 8, the reinforcing member 2 is fixed using a pair of tension members 5A arranged in a Λ shape. Each tension member 5A has a first end 51 that is brought into contact with the end 2E of the reinforcing member 2 in the circumferential direction of the tubular member 1, and a first end 51 of the non-degraded portion of the tubular member 1 at a position facing the reinforcing member 2. It has a second end portion 52 that is brought into contact with the inner circumferential surface 1S. On the other hand, in the example shown in FIG. 9, the reinforcing member 2 is fixed using a pair of tension members 5B and an intermediate member 5C arranged in an arch shape. Each tension member 5B has a first end 51 that is brought into contact with the end 2E of the reinforcing member 2, and a second end 52 that is brought into contact with the inner peripheral surface 1S of the non-degraded portion of the tubular member 1. has. The tension members 5B are arranged along the inner circumferential surface of the tubular member 1 at a position facing the reinforcing member 2, and are in contact with the respective second ends 52 of the tension members 5B that are abutted on the inner circumferential surface 1S at positions apart from each other. By arranging the intermediate member 5C, the reinforcing member 2 can be stably fixed.

When fixing the reinforcement member 2 using the tension members 5A and 5B as described above with reference to FIGS. Since it is not necessary to form a hole, water or air does not enter from the outside of the tubular member 1, and breakage or corrosion starting from the through hole does not occur. In addition, since the reinforcing member 2, the tension members 5A, 5B, and the intermediate member 5C constitute a reinforcing body that contacts the inside of the tubular member 1, the entire cross section of the tubular member 1 is stiffened, not just the degraded portion 1D. and can be reinforced. For example, when the tubular member is formed in a corrugated shape, that is, in a wave shape, in the longitudinal section as in the examples shown in FIGS. The positions of these members can be stabilized.

FIG. 10 is a diagram showing an example of an expansion/contraction mechanism of a tension member. As described above, the tension members 5A and 5B have a first end 51 that is brought into contact with the end 2E of the reinforcing member 2, and a second end that is brought into contact with the inner circumferential surface 1S of the non-degraded portion of the tubular member 1. However, due to, for example, tolerances in the roundness of the cross section of the tubular member 1, deformation of the cross section of the tubular member 1 due to earth pressure, manufacturing errors of the tension members 5A and 5B themselves, etc. If the distance between the end portion 51 and the second end portion 52 is fixed, each end portion may not be able to appropriately abut against the reinforcing member 2 or the inner circumferential surface 1S. Therefore, for example, by adjusting the distance between the first end 51 and the second end 52 using a telescopic mechanism 53 consisting of a threaded part (male thread) and a long nut (female thread) as shown in FIG. , the first end 51 and the second end 52 of the tension members 5A, 5B may reliably abut against the reinforcing member 2 or the inner circumferential surface 1S.

(Method for reinforcing tubular members)
Next, a method for reinforcing a tubular member using the reinforcing member as described above will be described. For example, when attaching the reinforcing member 2 to the tubular member 1 arranged so that the extension direction is substantially horizontal as in the example shown in FIG. A step of placing the reinforcing member 2 on the inner circumferential surface of the tubular member 1 including the degraded portion 1D, and a step of fixing the reinforcing member 2 to the tubular member 1 are performed.

At this time, for example, as shown in the example shown in FIG. 11, by laying the rail 6 inside the corrugated tubular member 1C and attaching the wheels 7 to the reinforcing member 2C, the reinforcing member 2C can be easily replaced with the tubular member 1C. It can be carried inside. For example, if the wheels 7 are installed at intervals that match the pitch of the waveform of the tubular member 1C, after the wheels 7 are delivered, the wheels 7 will be formed between the inner circumferential surface and the reinforcing member 2C at the troughs of the waveform of the tubular member 1C. The wheels 7 do not necessarily have to be removed.

In the above example, a step of filling the gap between the inner circumferential surface of the tubular member 1 and the reinforcing member 2 with the curable filler 4 may be further implemented. At this time, as shown in FIGS. 4, 6, and 7 above, the gaps between the tubular members 1, 1C and the reinforcing members 2A, 2B, 2C are closed at both ends of the tubular members 1, 1C in the extending direction. On the other hand, since both ends of the tubular members 1 and 1C in the circumferential direction are open, the curable filler 4 overflows from the ends of the reinforcing members 2A, 2B and 2C in the circumferential direction of the tubular members 1 and 1C. Completion of filling with the curable filler 4 can be determined by coming out. Note that the step of filling the curable filler 4 is preferably carried out after the step of fixing the reinforcing member 2 to the tubular member 1 in order to prevent the reinforcing member 2 from lifting or rotating during filling.

Alternatively, after the step of carrying the reinforcing member 2 into the tubular member 1, tension members 5A and 5B such as those shown in FIGS. It may also be fixed to the inner circumferential surface of the tubular member 1 that it contains. Alternatively, the reinforcing member 2 is temporarily fixed by arranging the tension members 5A and 5B, and then, for example, the reinforcing member 2 is fixed to the tubular member 1 by filling with a curable filler 4 that exhibits adhesive properties after curing. It's okay. By temporarily fixing the reinforcing member 2 using the tension members 5A and 5B, it is possible to prevent the reinforcing member 2 from lifting or rotating during filling with the curable filler 4. In this case, the tension members 5A and 5B may be removed after the curable filler 4 has hardened, or may be left in order to obtain the effect of reinforcing the tubular member 1 as described above, for example.

On the other hand, when attaching the reinforcing member 2 to the tubular member 1 arranged so that the extension direction is substantially perpendicular as in the example shown in FIG. A step of temporarily fixing the reinforcing member 2 to the inner peripheral surface of the tubular member 1 including the degraded portion 1D, and a step of fixing the reinforcing member 2 to the tubular member 1 are performed. In this case, the reinforcing member 2 is temporarily fixed using, for example, a scaffold assembled inside the tubular member 1, and then using tension members 5A and 5B as shown in FIGS. 8 and 9. It may be fixed. Alternatively, the reinforcing member 2 may be temporarily fastened using tension members 5A and 5B such as the examples shown in FIGS. Alternatively, it may be fixed using a curable filler 4 that exhibits adhesive properties after curing. In the latter case, the tension members 5A and 5B may be removed after the reinforcing member 2 is fixed.

Although preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person with ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea stated in the claims. It is understood that these also naturally fall within the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Tubular member, 1C... Tubular member, 1D... Deteriorated part, 1S... Inner peripheral surface, 2... Reinforcement member, 2A... Reinforcement member, 2B... Reinforcement member, 2C... Reinforcement member, 2E... End, 3... One side Bolt, 4... Hardenable filler, 5A... Tension member, 5B... Tension member, 5C... Intermediate member, 6... Rail, 7... Wheel, 21... Rib, 22... Standing portion, 51... First end, 52...Second end portion, 53...Expansion mechanism.

Claims (13)

A reinforcing structure for a tubular member including a reinforcing member attached to an inner circumferential surface of the tubular member at a deteriorated portion of the tubular member,
The reinforcing member is installed in a part of the circumferential direction of the tubular member, and is formed in a wave shape in a cross section including the extending direction of the tubular member ,
The tubular member is formed in a wave shape in a cross section including the extension direction,
A reinforcing structure for a tubular member, wherein a waveform of the reinforcing member is arranged to overlap a waveform of the tubular member. A reinforcing structure for a tubular member including a reinforcing member attached to an inner circumferential surface of the tubular member at a deteriorated portion of the tubular member,
The reinforcing member includes a rib that is installed in a part of the circumferential direction of the tubular member and protrudes outward in the radial direction of the tubular member in a cross section that includes the extending direction of the tubular member ,
The tubular member is formed in a wave shape in a cross section including the extension direction,
A reinforcing structure for a tubular member, wherein the rib protrudes into a space formed between the tubular member and the reinforcing member at a portion corresponding to a trough of a waveform of the tubular member. The reinforcing structure for a tubular member according to claim 1 or 2, wherein the reinforcing member is made of a highly corrosion-resistant material. The reinforcing structure for a tubular member according to any one of claims 1 to 3, wherein a curable filler is filled in a gap between the inner circumferential surface of the tubular member and the reinforcing member. The reinforcing structure for a tubular member according to any one of claims 1 to 4, wherein the reinforcing member is joined to the inner circumferential surface of the tubular member at a non-degraded portion around the degraded portion. The method further includes a tension member that is brought into contact with at least one end of the reinforcing member in the circumferential direction of the tubular member and an inner circumferential surface of a non-deteriorating portion of the tubular member to which the reinforcing member is not attached. , A reinforcing structure for a tubular member according to any one of claims 1 to 5. The tension member has a first end in contact with the end of the reinforcing member in the circumferential direction of the tubular member and a second end in contact with the inner circumferential surface of the non-degradable portion. The reinforcing structure for a tubular member according to claim 6, comprising an expansion and contraction mechanism capable of adjusting the distance. A method for reinforcing a tubular member, the method comprising reinforcing the tubular member whose extension direction is substantially horizontal using the reinforcing structure for a tubular member according to any one of claims 1 to 7,
carrying the reinforcing member into the tubular member;
placing the reinforcing member on the inner peripheral surface of the tubular member including the deteriorated portion;
and fixing the reinforcing member to the tubular member. The tubular member according to claim 8, further comprising the step of filling a curable filler into a gap between the inner circumferential surface of the tubular member and the reinforcing member after fixing the reinforcing member to the tubular member. Reinforcement method. The tubular member according to claim 9, further comprising the step of determining completion of filling with the curable filler by overflowing the curable filler from an end of the reinforcing member in the circumferential direction of the tubular member. Reinforcement method. A method for reinforcing a tubular member, comprising reinforcing the tubular member using the reinforcing structure for a tubular member according to any one of claims 1 to 7,
carrying the reinforcing member into the tubular member;
temporarily fixing the reinforcing member to the inner peripheral surface of the tubular member including the deteriorated portion;
and fixing the reinforcing member to the tubular member. The step of fixing the reinforcing member corresponds to at least one end of the reinforcing member in the circumferential direction of the tubular member, and to an inner peripheral surface of a non-degraded portion of the tubular member to which the reinforcing member is not attached. 12. The method for reinforcing a tubular member according to claim 11, comprising the step of arranging tension members that are brought into contact with each other. The step of temporarily fixing the reinforcing member includes attaching the reinforcing member to at least one end of the reinforcing member in the circumferential direction of the tubular member, and to the inner circumferential surface of the non-degraded portion of the tubular member to which the reinforcing member is not attached. including the step of arranging a tension member to be brought into contact;
The reinforcing method for a tubular member according to claim 11, further comprising the step of removing the tension member after the step of fixing the reinforcing member to the tubular member.

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