Pipe renewal method

Abstract

To minimize the scope of traffic restrictions while shortening construction time.SOLUTION: The pipe renewal method includes the steps of: while temporarily removing a shaft cover 20, setting a pipe lining material 10 impregnated with a liquid hardenable resin into a bottom-type inversion nozzle 30 connected to a pipeline 1; inverting the pipe lining material 10 within the pipeline 1 by supplying water to the pipe lining material 10, using the head pressure; installing the shaft cover 20; with the shaft cover 20 installed, expanding the pipe lining material 10 by applying pressure thereto; and curing the curable resin of the pipe lining material 10 by circulating hot water within the expanded pipe lining material 10 with the shaft cover 20 installed.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] One aspect of the present invention relates to a pipe rehabilitation method. [Background technology]

[0002] A known pipe rehabilitation method for rehabilitating aging pipelines involves inverting and inserting a tubular lining material impregnated with a liquid curable resin into the aging pipeline, allowing the curable resin to harden and form a resin pipe inside the aging pipeline (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-104130 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, in the above-mentioned pipe rehabilitation method, it is necessary to remove the shaft cover and carry out work such as hardening the hardening resin, which requires traffic restrictions over a wide area and increases the construction time.

[0005] One aspect of the present invention has been made in consideration of the above-mentioned situation, and aims to provide a pipe rehabilitation method that can shorten construction time while minimizing the area in which traffic restrictions are required. [Means for solving the problem]

[0006] A pipe rehabilitation method according to one embodiment of the present invention includes the steps of setting a pipe lining material impregnated with a liquid curable resin in a nozzle connected to the pipeline with the shaft cover temporarily removed, supplying water to the pipe lining material to invert the pipe lining material within the pipeline using head pressure, installing the shaft cover, applying pressure to the pipe lining material with the shaft cover installed to expand the diameter of the pipe lining material, and circulating warm water within the expanded pipe lining material with the shaft cover installed to harden the curable resin in the pipe lining material.

[0007] In a pipe rehabilitation method according to one embodiment of the present invention, with the shaft cover in place, the inverted pipe lining material is pressurized to expand its diameter, and the pipe lining material is heated to harden the curable resin. For example, if the expansion and hardening work is performed with the shaft cover removed, traffic restrictions must be implemented over a wide area while these work is being carried out. In such a pipe rehabilitation method, the need for wide-area traffic restrictions increases the overall construction time (number of days required for construction). In contrast, with a pipe rehabilitation method according to one embodiment of the present invention, the expansion and hardening work is performed with the shaft cover in place. This reduces the area of ​​traffic restrictions compared to when these work is performed with the shaft cover removed, thereby reducing the overall construction time (number of days required for construction). As described above, the pipe rehabilitation method according to one embodiment of the present invention can shorten construction time while minimizing the area of ​​traffic restrictions.

[0008] The pipe rehabilitation method may further include, before the step of installing the shaft cover, a step of passing a hot water circulation pipe for drawing hot water from the heating equipment into the pipe lining material inside a guide pipe buried so as to penetrate a part of the support part for supporting the shaft cover. In such a pipe rehabilitation method, by passing the hot water circulation pipe inside the guide pipe buried in the support part in advance, the hot water circulation pipe can be easily installed before the installation of the shaft cover.

[0009] The pipe rehabilitation method may further include, after the step of installing the shaft cover, a step of opening an opening / closing part formed on the shaft cover and installing a hot water circulation pipe for drawing hot water from the heating equipment into the pipe lining material. In such a pipe rehabilitation method, by using a shaft cover formed with an opening / closing part, after the shaft cover is installed, the hot water circulation pipe can be easily installed by the simple task of opening the opening / closing part without moving the shaft cover itself.

[0010] In the above-described pipe rehabilitation method, the steps of inverting the pipe lining material within the pipeline, installing the shaft cover, expanding the diameter of the pipe lining material, and curing the curable resin of the pipe lining material may be performed consecutively without interruption between the steps. In this way, by performing each step consecutively without interruption, the construction time can be further shortened. [Effects of the Invention]

[0011] According to the pipe rehabilitation method of one aspect of the present invention, it is possible to shorten construction time while minimizing the area where traffic restrictions are required. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating steps of a pipe rehabilitation method according to the first embodiment. [Figure 2] FIG. 2 is a diagram illustrating the steps carried out following FIG. [Figure 3] FIG. 3 is a diagram illustrating the steps carried out following FIG. [Figure 4] FIG. 4 is a perspective view showing an example of a shaft cover with a manhole. [Figure 5] FIG. 5 is a flowchart showing the procedure of the pipe rehabilitation method according to the first embodiment. [Figure 6] FIG. 6 is a diagram illustrating steps of a pipe rehabilitation method according to the second embodiment. [Figure 7] FIG. 7 is a piping diagram of a configuration using a horizontal hole. [Figure 8] FIG. 8 is a flowchart showing the procedure of the pipe rehabilitation method according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of a pipe rehabilitation method will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are designated by the same reference numerals, and duplicated description will be omitted.

[0014] [First embodiment] The pipe rehabilitation method according to this embodiment is applied, for example, to the rehabilitation of an aged pipeline 1. The pipeline 1 to which the pipe rehabilitation method according to this embodiment is applied is, for example, a pipeline with a pipe diameter of 400 mmΦ or more and a length of 50 m or more. In the pipe rehabilitation method according to this embodiment, a pipe lining material 10 impregnated with a liquid curable resin is inverted and inserted into the aged pipeline 1, and the curable resin is cured to form a resin pipe within the pipeline 1, thereby rehabilitating the pipeline 1.

[0015] 1 to 3 are diagrams illustrating the steps of a pipe rehabilitation method according to this embodiment. In this pipe rehabilitation method, the steps of setting the pipe lining material 10 (setting step), inverting the pipe lining material 10 within the pipeline 1 (inverting step), installing a shaft cover 20 (installation step), expanding the diameter of the pipe lining material 10 (diameter expansion step), and curing the curable resin of the pipe lining material 10 (curing step) are carried out in this order. FIG. 1 shows the state in which the inverting step is being carried out after the setting step. FIG. 2 shows the state in which the diameter expansion step is being carried out after the inverting step and the installation step. FIG. 3 shows the state in which the curing step is being carried out after the diameter expansion step.

[0016] The setting step will be described with reference to Figure 1. The setting step is a step of setting a pipe lining material 10 impregnated with a liquid curable resin in a bottom-type inverted nozzle 30 (nozzle) arranged so as to be continuous with the pipeline 1, with the shaft cover 20 in the shaft 100 temporarily removed.

[0017] The bottom-type inverted nozzle 30 is disposed below the vertical shaft 100. The bottom-type inverted nozzle 30 has a first cylindrical portion 31, a second cylindrical portion 32, and a bent portion 33. The first cylindrical portion 31 is a cylindrical portion to which the pipe lining material 10 is attached at its tip, and an opening 31a at the tip faces the opening 1a of the pipeline 1. The nozzle axis 31b of the first cylindrical portion 31 approximately coincides with the extension direction (horizontal direction) of the pipeline 1. The second cylindrical portion 32 is a cylindrical portion to which the auxiliary tube 40 is attached at its tip, and the orientation of the opening 32a at the tip is approximately perpendicular to the orientation of the opening 31a. The bent portion 33 is a portion that communicates with the first cylindrical portion 31 and the second cylindrical portion 32, and connects the first cylindrical portion 31 and the second cylindrical portion 32.

[0018] The pipe lining material 10 is constructed by processing a resin adsorbent made of polyester fiber nonwoven fabric into a tubular shape, airtightly covering the outer surface of the tubular resin adsorbent with a resin film such as polyethylene, and impregnating the resin adsorbent with a liquid curable resin such as unsaturated polyester. One end of the pipe lining material 10 is fixed to, for example, a reel (not shown), and the other end 10a is airtightly attached to the outer periphery of the opening 31a of the first cylindrical portion 31 of the bottom-type inverted nozzle 30.

[0019] In the setting process, first, road restrictions are implemented to secure a work zone. Then, the shaft cover 20 is temporarily removed, and the bottom-type inversion nozzle 30 is placed at a position lower than the shaft 100. The bottom-type inversion nozzle 30 is placed so that its opening 31a faces the opening 1a of the pipeline 1 and its nozzle axis 31b is approximately aligned with the direction in which the pipeline 1 extends (horizontal direction).

[0020] Then, an auxiliary tube 40 is prepared, with a top collar 41 attached to one end and a connection collar 42 attached to the other end. The auxiliary tube 40 may have a length of, for example, about 4.0 to 6.0 m. The connection collar 42 is connected to the upper end of the second cylindrical portion 32 of the bottom-type inverted nozzle 30, and airtightness is ensured using, for example, a packing and a screw-type fastener.

[0021] The inversion tower 50 is assembled at the top of the shaft 100, and the top collar 41 is installed at a position a predetermined height higher than the bottom of the pipeline 1. The predetermined height here is a height that makes it possible to ensure the pressure (hydraulic head pressure) required to invert the pipe lining material 10.

[0022] Then, the other end 10a of the pipe lining material 10 is guided to the opening 31a of the first cylindrical portion 31 of the bottom-type inverted nozzle 30, folded back outward, and airtightly attached to the outer periphery of the opening 31a with a band 60 or the like. Through the above operations, the pipe lining material 10 is set in the bottom-type inverted nozzle 30.

[0023] The inverting process will be described with reference to Figure 1. The inverting process is a process in which water is supplied to the pipe lining material 10, causing the pipe lining material 10 to invert within the pipeline 1 due to hydraulic head pressure. In the inverting process, water is supplied to the auxiliary tube 40, and the hydraulic head is raised, causing the pipe lining material 10 to invert. The pipe lining material 10 is inverted by the hydraulic head pressure and inserted deep within the pipeline 1. Note that in the inverting process, as shown in Figure 1, a blower 200 may be provided within the pipeline 1 to blow air onto the pipe lining material 10 that is being inverted and inserted.

[0024] The installation process will be described with reference to Figure 2. The installation process is a process of installing the shaft cover 20. In the installation process, first, the water head pressure is reduced by draining the water. Specifically, the water head is lowered to the upper end portion of the bottom-type inversion nozzle 30. Then, the auxiliary tube 40 and the inversion tower 50 are removed. Next, a nozzle top cover is attached to the upper end portion of the bottom-type inversion nozzle 30. Finally, the shaft cover 20 is installed so as to cover the top of the shaft 100.

[0025] Here, the shaft cover 20 according to this embodiment is a shaft cover with a manhole, as shown in FIG. 4. FIG. 4 is a perspective view showing an example of a shaft cover with a manhole. As shown in FIG. 4, the shaft cover 20 according to this embodiment has an openable / closable opening / closing section 25 formed in a part thereof. A handle 25a is provided on the top of the opening / closing section 25. A worker can enter and exit the interior of the shaft 100 through a hole that appears when the worker holds the handle 25a and moves (opens) the opening / closing section 25. By using such a shaft cover 20, after the shaft cover 20 is installed, the installation of the hot water circulation pipe 80, which will be described later, can be carried out by the simple task of opening the opening / closing section 25 without moving the shaft cover 20 itself.

[0026] The diameter expanding step will be described with reference to Figure 2. The diameter expanding step is a step of expanding the diameter of the pipe lining material 10 by applying pressure to the pipe lining material 10 in a state where the shaft cover 20 is installed.

[0027] In the diameter expansion process, first, a water tank 91 storing water to be used for pressurization is installed. Then, the opening / closing portion 25 of the shaft cover 20 is opened, and the water supply hose 70, the water supply pipe 71, and the hot water circulation pipe 80 (see FIG. 3) are installed. Specifically, the water supply hose 70 is fed downward from the opening 32a of the bottom-type inverted nozzle 30, and the tip of the water supply hose 70 reaches near the tip of the pipe lining material 10. The upper end of the water supply hose 70 is connected to the water supply pipe 71. The water supply pipe 71 is connected to a pressure pump 92 connected to the water tank 91. The pressure pump 92 may be replaced with a water head holding tank. Then, by operating the pressure pump 92, pressurized water from the water tank 91 is sent to the water supply hose 70 via the water supply pipe 71, and the pipe lining material 10 is expanded in diameter by the pressurized water. In this state, the pressure in the pipe lining material 10 increases, and the pipe lining material 10 is pressed against the wall surface of the pipeline 1. The increase in pressure is monitored, for example, by continuously measuring the pressure with a pressure gauge 93. In this case, the target value of the pressure may be, for example, about 0.04 to 0.09 MPa.

[0028] The curing step will be described with reference to Figure 3. The curing step is a step in which, with the shaft cover 20 in place, hot water is circulated through the expanded pipe lining material 10 to cure the curable resin in the pipe lining material 10.

[0029] In the curing process, first, the boiler car 94 is placed in a predetermined position. Then, the opening / closing section 25 of the shaft cover 20 is opened, and the hot water circulation pipe 80 is connected to the boiler 94a of the boiler car 94, which is the heating equipment. The hot water circulation pipe 80 is a pipe for drawing hot water from the boiler 94a into the pipe lining material 10. The hot water circulation pipe 80 is arranged to send water flowing into the pipe lining material 10 to the boiler 94a and to draw hot water heated in the boiler 94a into the pipe lining material 10. The hot water circulation pipe 80 circulates the hot water within the pipe lining material 10, causing the curable resin in the pipe lining material 10 to cure. Whether the curable resin has cured is determined by measuring the temperature of the pipe lining material 10 to confirm whether heat generation due to curing is occurring. The temperature of the pipe lining material 10 is measured, for example, by a thermocouple attached to the pipeline 1. In the hardening process, the temperature of the pipe lining material 10 is maintained at, for example, about 80°C.

[0030] Here, the above-mentioned inversion process, installation process, diameter expansion process, and hardening process are carried out continuously, and some work is carried out between the processes without complete interruption. The time from the installation of the shaft cover 20 to the start of the diameter expansion process described below (the supply of pressurized water) may be, for example, about 2 to 5 hours. Furthermore, the time from the start of the diameter expansion process described above (the supply of pressurized water) to the completion of hardening of the hardening resin of the pipe lining material 10 may be approximately 6 to 12 hours, although this varies depending on the outside temperature, etc.

[0031] Next, the procedure of the pipe rehabilitation method according to the first embodiment will be described with reference to Fig. 5. Fig. 5 is a flowchart showing the procedure of the pipe rehabilitation method according to the first embodiment.

[0032] 5, first, road restrictions are put in place and a work zone is secured (step S1), and construction vehicles are positioned (step S2). Then, the shaft cover 20 is temporarily removed (step S3), vehicles for transporting materials and equipment are positioned (step S4), and the reversing tower 50 is assembled (step S5).

[0033] Then, the auxiliary tube 40 is set (step S6). Specifically, the connection collar 42 of the auxiliary tube 40 is connected to the upper end of the second cylindrical portion 32 of the bottom-type inverted nozzle 30, and the top collar 41 is set at a predetermined height.

[0034] Next, a material cart is positioned (step S7), and preparations for water supply for the inversion process are made (step S8). Then, the pipe lining material 10 is set in the bottom-type inversion nozzle 30 (step S9). Specifically, the other end 10a of the pipe lining material 10 is guided to the opening 31a of the first cylindrical portion 31 of the bottom-type inversion nozzle 30, folded back outward, and airtightly attached to the outer periphery of the opening 31a with a band 60 or the like.

[0035] Then, water is supplied to the auxiliary tube 40 to raise the water head, thereby inverting the pipe lining material 10 (step S10). When the pipe lining material 10 is inserted deep into the pipeline 1, the inverting process is completed (step S11).

[0036] Next, a water head adjustment is performed by draining the water to lower the water head to the upper end portion of the bottom-type inversion nozzle 30 (step S12). At this time, the auxiliary tube 40 is removed (step S13), and the inversion tower 50 is removed (step S14).

[0037] Then, a nozzle top cover is attached to the top end portion of the bottom-type inverted nozzle 30 (step S15), and the shaft cover 20 is installed at the top of the shaft 100 (step S16).

[0038] Next, a water tank 91 is installed to store water to be used for pressurization (step S17). At this time, the construction vehicles are withdrawn (step S18), and the road is opened (step S19).

[0039] Then, the opening / closing part 25 of the shaft cover 20 is opened, and the water supply hose 70, the water supply pipe 71, and the hot water circulation pipe 80 are installed (step S20). Then, the water supply pipe 71 is connected to the pressure pump 92 connected to the water tank 91 (step S21).

[0040] Next, the pressurized water from the water tank 91 is supplied to the water supply hose 70 by operating the pressure pump 92, and the pressurized water expands the diameter of the pipe lining material 10 (step S22). The increase in pressure is monitored by, for example, continuously measuring the pressure with a pressure gauge 93 (step S23).

[0041] Then, the boiler vehicle 94 is placed in a predetermined position (step S24), and the hot water circulation pipe 80 is connected to the boiler 94a of the boiler vehicle 94 (step S25). Then, the hot water circulation pipe 80 starts circulating (heating) the hot water in the pipe lining material 10 (step S26).

[0042] The water temperature is measured, for example, by a thermocouple attached to the pipeline 1, and is managed so as to be maintained at a predetermined temperature (for example, 80°C) (step S27). Then, by managing the water temperature, it is confirmed that heat generation due to curing has occurred, and the completion of curing of the pipe lining material 10 is confirmed (step S28).

[0043] Next, the effects of the pipe rehabilitation method according to this embodiment will be described.

[0044] The pipe rehabilitation method of this embodiment includes the steps of setting a pipe lining material 10 impregnated with a liquid curable resin in a bottom-type inversion nozzle 30 connected to the pipeline 1 with the shaft cover 20 temporarily removed, supplying water to the pipe lining material 10 to invert the pipe lining material 10 within the pipeline 1 by hydraulic head pressure, installing the shaft cover 20, applying pressure to the pipe lining material 10 with the shaft cover 20 installed to expand the diameter of the pipe lining material 10, and curing the curable resin in the pipe lining material 10 by circulating warm water within the expanded pipe lining material 10 with the shaft cover 20 installed.

[0045] In the pipe rehabilitation method according to the present embodiment, with the shaft cover 20 in place, the inverted pipe lining material 10 is pressurized to expand its diameter, and the pipe lining material 10 is heated to harden the curable resin. For example, if the expansion and hardening work is performed with the shaft cover 20 removed, traffic control must be implemented reliably while these work operations are being carried out. This type of pipe rehabilitation method presents problems, such as the length of time (expansion area) required for traffic control and the overall construction time (number of construction days). In this regard, with the pipe rehabilitation method according to the present embodiment, the expansion and hardening work is performed with the shaft cover 20 in place. Therefore, compared to when these work operations are performed after the shaft cover 20 is removed, the area of ​​traffic control can be reduced (and in some cases, the time required for traffic control can be shortened), and the overall construction time (number of construction days) can also be shortened. As described above, the pipe rehabilitation method according to the present embodiment can shorten the construction time while minimizing the area of ​​traffic control.

[0046] The above pipe rehabilitation method may further include, after the step of installing the shaft cover 20, the step of opening the opening / closing section 25 formed on the shaft cover 20 and installing a hot water circulation pipe 80 for drawing hot water from the boiler 94a into the pipe lining material 10. In such a pipe rehabilitation method, by using the shaft cover 20 formed with the opening / closing section 25, after the shaft cover 20 is installed, the hot water circulation pipe 80 can be easily installed by the simple task of opening the opening / closing section 25 without moving the shaft cover 20 itself.

[0047] In the above pipe rehabilitation method, the step of inverting the pipe lining material 10 within the pipeline 1, the step of installing the shaft cover 20, the step of expanding the diameter of the pipe lining material 10, and the step of curing the curable resin of the pipe lining material 10 are carried out continuously, and work does not need to be interrupted between steps. In this way, by carrying out each step continuously without interruption of work, construction time can be further shortened.

[0048] [Second embodiment] Next, a description will be given of a pipe rehabilitation method according to a second embodiment. In the second embodiment, differences from the pipe rehabilitation method according to the first embodiment will be mainly described, and common descriptions will be omitted.

[0049] In the pipe rehabilitation method of the second embodiment, instead of using a shaft cover with a manhole like the shaft cover 20 of the first embodiment, a guide pipe 154 is buried in a support beam 152 that receives a support beam 151 that supports the shaft cover 20A (see Figure 6), and the hot water circulation pipe 80 is installed by passing the hot water circulation pipe 80 inside the guide pipe 154.

[0050] That is, the pipe rehabilitation method of the second embodiment includes, before the step of installing the shaft cover 20A, a step of passing a hot water circulation pipe 80 inside a guide pipe 154 buried so as to penetrate a part of a support beam support 152 (support part) that receives a support beam 151 for supporting the shaft cover 20A.

[0051] FIG. 6 is a diagram illustrating the steps of a pipe rehabilitation method according to the second embodiment. As shown in FIG. 6, a support beam 152 is provided to support a support beam 151 for supporting the shaft cover 20A. The support beam 151 and the support beam 152 are, for example, H-beams. A lattice-patterned retaining material 155 made of steel sheet piles or the like is provided below the support beam 152. In this configuration, a horizontal hole 153 is formed through a portion of the support beam 152, and a guide pipe 154 is provided so as to be embedded in the horizontal hole 153. By providing the guide pipe 154 in the horizontal hole 153 of the support beam 152 in this way, the hot water circulation pipe 80 can be easily installed by passing it through the inside of the guide pipe 154 before installing the shaft cover 20A.

[0052] 7 is a detailed piping diagram of a configuration utilizing the above-mentioned horizontal holes 153. More specifically, the horizontal holes 153 include three horizontal holes 153a, 153b, and 153c that penetrate the beam support 152. More specifically, the guide pipes 154 include a guide pipe 154a embedded in the horizontal hole 153a, a guide pipe 154b embedded in the horizontal hole 153b, and a guide pipe 154c embedded in the horizontal hole 153c. More specifically, the hot water circulation pipe 80 includes a hot water circulation pipe 80a that sends water flowing into the pipe lining material 10 to the boiler 94a, and a hot water circulation pipe 80b that draws hot water heated in the boiler 94a into the pipe lining material 10. 7, the hot water circulation pipe 71 is connected to a head holding tank 160 that functions similarly to the pressure pump 92.

[0053] Fig. 8 is a flowchart showing the procedure of the pipe rehabilitation method according to the second embodiment. As shown in Fig. 8, steps S101 to S115 are the same as steps S1 to S15 in the first embodiment described above.

[0054] Following step S115, a water tank 91 storing water to be used for pressurization is installed (step S116). Then, before installing the shaft cover 20A, the horizontal hole 153 of the receiving beam support 152 is used to install the hot water circulation pipe 80a in the guide pipe 154a, the hot water circulation pipe 80b in the guide pipe 154b, and the water supply pipe 71 in the guide pipe 154c (step S117). Then, the water supply pipe 71 is connected to the pressure pump 92 (or the water head holding tank 160) connected to the water tank 91 (step S118).

[0055] Next, the shaft cover 20A is installed (step S119), the construction vehicles are withdrawn (step S120), and the road is opened (step S121).

[0056] Next, the pressurized water from the water tank 91 is supplied to the water supply hose 70 by operating the pressure pump 92, and the pressurized water expands the diameter of the pipe lining material 10 (step S122). The increase in pressure is monitored by, for example, continuously measuring the pressure with the pressure gauge 93 (step S123).

[0057] Then, the boiler vehicle 94 is placed in a predetermined position (step S124), and the hot water circulation pipes 80a and 80b are connected to the boiler 94a of the boiler vehicle 94 (step S125). Then, the hot water circulation pipes 80a and 80b start circulating (heating) the hot water in the pipe lining material 10 (step S126).

[0058] The water temperature is measured, for example, by a thermocouple attached to the pipeline 1, and is managed so as to be maintained at a predetermined temperature (for example, 80°C) (step S127). Then, by managing the water temperature, it is confirmed that heat generation due to curing has occurred, and the completion of curing of the pipe lining material 10 is confirmed (step S128). [Explanation of symbols]

[0059] 1...pipe line, 10...pipe lining material, 20, 20A...shaft cover, 25...opening and closing part, 30...bottom type inverted nozzle (nozzle), 80...pipe for circulating hot water, 152...receiving beam support (support part), 154...guide pipe.

Claims

1. With the shaft cover temporarily removed, a step of setting a pipe lining material impregnated with a liquid curable resin in a nozzle connected to the pipeline; supplying water to the pipe lining material to invert the pipe lining material within the pipeline using hydraulic head pressure; Installing the shaft cover; a step of expanding the diameter of the pipe lining material by applying pressure to the pipe lining material in a state where the shaft cover is installed; With the shaft cover installed, a step of circulating hot water through the expanded pipe lining material to harden the hardening resin of the pipe lining material.

2. A pipe rehabilitation method according to claim 1, further comprising, before the step of installing the shaft cover, a step of passing a hot water circulation pipe for drawing the hot water from a heating equipment into the pipe lining material inside a guide pipe buried so as to penetrate a part of the support portion for supporting the shaft cover.

3. 2. The pipe rehabilitation method according to claim 1, further comprising the step of opening an opening and closing portion formed on the shaft cover and installing a hot water circulation pipe for drawing the hot water from a heating facility into the pipe lining material after the step of installing the shaft cover.

4. The pipe rehabilitation method according to any one of claims 1 to 3, wherein the steps of inverting the pipe lining material within the pipeline, installing the shaft cover, expanding the diameter of the pipe lining material, and hardening the hardening resin of the pipe lining material are carried out continuously, and work is not interrupted between steps.

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