Repair method

Abstract

To provide a repairing method which enables the smooth progress of construction work in the repair of lining concrete including the application work of a resin coating agent.SOLUTION: The method for repairing the lining concrete 103 of the tunnel 101 includes a work space forming step of forming the work space 3 partitioned from the outside with respect to the inner surface 105 of the lining concrete 103 by the partitioning portion 13 by arranging the moving body unit 1 having the support base 15, the work stage 7, and the partitioning portion 13 including the support column 23,29 and the curing sheet 21,27 in the tunnel 101, an air conditioning step of adjusting the temperature and / or humidity in the work space, and a coating step of performing, on the work stage 7, work of applying a resin coating agent to the inner surface 105 in the work space 3 air-conditioned in the air conditioning step.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a repair method. [Background technology]

[0002] A mobile scaffolding described in Patent Document 1 below is known as a technology related to repairing tunnel lining concrete. This mobile scaffolding is installed on a truck and is used for high-altitude work inside a tunnel. As the truck moves inside the tunnel, the mobile scaffolding can be moved to each work location on the tunnel inner wall. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-038701 Summary of the Invention [Problem to be solved by the invention]

[0004] Repairing tunnel concrete linings may involve applying a resin coating to the lining concrete surface. In this type of application work, the temperature and humidity at the site may make it difficult for the coating to harden on the lining concrete surface, which may hinder smooth progress of repair work. Therefore, the present invention aims to provide a repair method that enables smooth progress of repair work in repairing lining concrete, including the application of a resin coating. [Means for solving the problem]

[0005] The gist of the present invention lies in the following [1] to [7].

[0006] [1] A method for repairing tunnel lining concrete, comprising: a work space forming step of placing a movable mobile unit, which includes a base and a partition section supported by the base and forming a work space separated from the outside, inside the tunnel to form a work space separated from the outside on the inner surface of the lining concrete; an air conditioning step of adjusting the temperature and / or humidity inside the work space; and an application step of applying a resinous coating agent to the inner surface of the lining concrete in the work space conditioned by the air conditioning step.

[0007] [2] The repair method described in [1], wherein the mobile unit is provided with a stage used as a work platform supported on the base, and in the application process, the work of applying the coating agent is performed on the stage.

[0008] [3] A repair method described in [2], wherein the stage forms part of the partition and separates the work space from the outside, and the partition has a pair of axial partitions that separate the work space from the outside in the axial direction of the tunnel.

[0009] [4] A repair method described in [2] or [3], wherein the stage forms part of the partition and separates the work space from the outside, and the partition has a circumferential partition that separates the work space from the outside in the circumferential direction of the tunnel.

[0010] [5] A repair method according to any one of [1] to [4], wherein the partition comprises a frame and a curing sheet supported by the frame, the frame has a support pillar that can expand and contract toward the inner surface of the lining concrete, and the method further comprises a gap adjustment step of expanding and contracting the support pillar to adjust the gap between the inner surface and the partition.

[0011] [6] A repair method according to any one of [1] to [5], further comprising a moving unit moving step in which the base moves on the bottom surface of the tunnel, thereby moving the work space to a position facing the desired work target area of ​​the lining concrete.

[0012] [7] A method for repairing tunnel lining concrete, comprising: a work space forming step of placing a movable unit inside the tunnel, the movable unit having a base and a partition section supported by the base and forming a work space separated from the outside, to form a work space separated from the inside of the lining concrete from the outside; and a repair step of performing repair work on the inside of the lining concrete in the work space. [Effects of the Invention]

[0013] According to the present invention, a repair method can be provided that enables smooth progress of work in repairing lining concrete, including the application of a resin coating agent. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing the vicinity of a mobile unit installed in a tunnel and used in a repair method. [Figure 2] 2 is a front view of the vicinity of the moving body unit in FIG. 1 as viewed in the tunnel axis direction. [Figure 3] FIG. 10 is an enlarged view of the axial partition section as seen from inside the work space in the tunnel axis direction. [Figure 4] This is an enlarged view of the circumferential partition as seen from inside the work space in the circumferential direction of the tunnel. [Figure 5] 3 is a flowchart of the repair method of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of a repair method according to the present invention will be described in detail below with reference to the drawings. The repair method of this embodiment targets the lining concrete 103 of a tunnel 101 shown in Figure 1. Figure 1 is a perspective view showing the vicinity of a mobile unit 1 installed in this tunnel 101 and used in the repair method, and Figure 2 is a front view of this as viewed in the tunnel axis direction. In the following, when the terms "left / right" are used, they correspond to the left and right directions within the tunnel 101 as viewed in Figure 2.

[0016] In the repair method of this embodiment, a mobile unit 1 is placed inside a tunnel 101 to form a work space 3 that faces the inner surface 105 of the lining concrete 103 and is separated from the outside. A worker then works inside this work space 3 to repair the lining concrete 103. Note that the concept of "repairing" the lining concrete 103 also includes "reinforcing" the lining concrete 103. Hereinafter, a portion of the inner surface 105 that includes the portion of the lining concrete 103 that is to be repaired will be referred to as a "work area 105a." FIGS. 1 and 2 show an example in which the work area 105a is located at an elevated position on the left side of the inner surface 105. In this case, to form the work space 3 at an elevated position on the left side of the tunnel 101, the mobile unit 1 is installed on the left lane of the road inside the tunnel 101, and vehicles are allowed to pass only on the right lane of the road.

[0017] The work space 3 is a space surrounded by the inner surface 105 of the lining concrete 103, the work stage 7 described below, a pair of axial partitions 9, 9 extending in the cross-sectional direction of the tunnel 101, and a circumferential partition 11, and is a space that is closed and separated from the outside. Note that "closed and separated" here means that the work space 3 is separated to the extent that the temperature and / or humidity within it can be appropriately adjusted.

[0018] The work space 3 is partitioned from the outside in the tunnel axis direction by a pair of axial partitions 9, 9. The work space 3 is also partitioned from the outside in the tunnel circumferential direction by circumferential partitions 11, 12. The work space 3 is also partitioned from the outside in the vertical direction by the work stage 7. The dimension of the work space 3 in the tunnel width direction is approximately half that of the tunnel 101, and preferably slightly larger than half. The dimension of the work space 3 in the tunnel axis direction is, for example, approximately 10.5 m.

[0019] The mobile unit 1 for forming the work space 3 described above includes a partition 13 that surrounds the work space 3 within the tunnel 101 and a support base 15 (base) that supports the partition 13. The support base 15 includes a bed 17a of a general-purpose truck 17 (e.g., a general-purpose 4-ton truck) that can travel (move) on the tunnel bottom 107, and support legs 19 constructed on the bed 17a of the truck 17. The support legs 19 may be constructed by combining general-purpose materials such as scaffolding and pipe materials, but may also include dedicated components. Because the support base 15 includes the bed 17a of the truck 17, the entire mobile unit 1 can be moved within the tunnel 101 by running the truck 17. During repair work on the lining concrete 103, the truck 17 may be fixed to the tunnel bottom 107 by extending outriggers (not shown), for example.

[0020] The partition 13 comprises the aforementioned work stage 7 used as a work scaffold for repair workers, the aforementioned axial partitions 9, 9 arranged to rise upward from both edge portions 7c of the tunnel axial end portion of the work stage 7, the aforementioned circumferential partition 11 arranged to rise upward from the edge portion 7d at the right end of the work stage 7, and the circumferential partition 12 arranged to close the gap between the edge portion 7e at the left end of the work stage 7 and the inner surface 105 of the covering concrete 103.

[0021] The work stage 7 is placed at a high position within the tunnel 101, facing the inner surface 105 at a distance sufficient for the worker to easily access the work target area 105a. The work stage 7 has a stepped structure with approximately four to five steps, with the tunnel width as the ascending / descending direction. If the step height of the stepped portion is, for example, 40 cm or more, it is preferable to provide handrails extending in the tunnel axial direction at the step height for the worker's safety. However, providing such handrails at the step height would divide the space above the work stage 7 in the tunnel width direction, reducing the worker's freedom of movement on the work stage 7. In contrast, the step height of the work stage 7 is kept to less than 40 cm, and therefore such handrails are not necessary. Furthermore, if the step height is less than 30 cm, the worker's safety can be sufficiently ensured without such handrails. Therefore, in this embodiment, the step height is kept to less than 40 cm or less than 30 cm, and therefore such handrails are not provided at the step height. Therefore, workers can easily step over the steps and move efficiently in the tunnel width direction on the work stage 7, improving the efficiency of repair work. Handrails (not shown) may be provided at each edge of the work stage 7 (edges 7c, 7c, edge 7d, edge 7e) so as to rise upward from each edge and surround the work stage 7.

[0022] The dimension of the work stage 7 in the tunnel axis direction is, for example, approximately 10.5 m, and the dimension of the work stage 7 in the tunnel width direction is smaller than half of the tunnel 101. The edge 7e at the left end of the work stage 7 is located close to the inner surface 105, and the edge 7d at the right end of the work stage 7 is located slightly to the left of the center of the tunnel 101 in the width direction. The work stage 7 may be constructed by combining general-purpose materials such as scaffolding and pipe materials, but may also include some specialized components. In particular, specialized components may be used to achieve the relatively small step described above. Gaps between the scaffolding materials, pipe materials, etc. that make up the work stage 7 may be blocked with sheet material or the like so that the work space 3 is enclosed by the work stage 7.

[0023] The upper edge 9a of the axial partition 9 is curved along the cross-sectional shape of the inner surface 105 and is positioned so as to minimize any gap in the tunnel radial direction relative to the inner surface 105. The lower edge 9b of the axial partition 9 is positioned along the edge 7c of the tunnel axial end of the work stage 7.

[0024] The upper edge 11a of the circumferential partition 11 forms a straight line extending in the tunnel axial direction and is positioned so as to minimize the gap in the tunnel radial direction relative to the inner surface 105. The lower edge 11b of the circumferential partition 11 is located along the edge 7d of the work stage 7 at the end of the tunnel width direction. The upper edge 11a of the circumferential partition 11 protrudes to the right of the lower edge 11b. In other words, when viewed from the tunnel axial direction (as shown in Figure 2), the circumferential partition 11 is inclined so that it protrudes to the right as it goes upward. The edge 7d of the work stage 7 and the lower edge 11b of the circumferential partition 11 are located in the left lane, while the upper edge 11a is located in the right lane. In other words, the upper edge 11a is located, for example, about 50 cm to the right of the center of the tunnel 101 in the width direction. With this configuration, the work space 3 is positioned so as to straddle the circumferential center of the ceiling of the tunnel 101, i.e., the upper end of the work space 3 is positioned so as to extend to the right side, for example, by about 50 cm, from the widthwise center of the tunnel 101.

[0025] FIG. 3 is an enlarged view of the axial partition 9 as viewed from within the work space 3 in the tunnel axial direction. The axial partition 9 is composed of an impermeable protective sheet 21 for partitioning the work space 3 in an enclosed manner and multiple supports 23 supporting the protective sheet 21. The upper ends of the protective sheet 21 are supported along the upper ends of the supports 23, and the axial partition 9 is formed by stretching the protective sheet 21 between the supports 23. Each support 23 is configured to be extendable and retractable toward the inner surface 105. As a specific structural example, each support 23 is telescopically structured with an outer tube 23a and an inner tube 23b, allowing the length to be adjusted. Each outer tube 23a is configured, for example, as an extension of a pipe material included in the support leg 19 (FIG. 2). The outer tube 23a may also serve as a support for a handrail (not shown) surrounding the work stage 7.

[0026] As described above, by independently adjusting the length of each of the extendable support columns 23, it is possible to adjust the gap between the upper edge 9a of the axial partition section 9 and the inner surface 105, and by making this gap as small as possible, it is possible to effectively partition the work space 3. Furthermore, because each of the support columns 23 is independently extendable and retractable, it is possible to adjust the curved shape of the upper edge 9a, so the movable body unit 1 can be used universally for a variety of tunnels with different cross-sectional shapes.

[0027] FIG. 4 is an enlarged view of the circumferential partition 11 as viewed from within the work space 3 in the circumferential direction of the tunnel. The circumferential partition 11 is composed of a curing sheet 27 having a configuration similar to the curing sheet 21 described above, and a plurality of supports 29 that support the curing sheet 27. The curing sheet 27 and the curing sheet 21 may be composed of a single sheet material. As shown in FIG. 3, each support 29 is inclined so that it protrudes to the right as it extends upward. The upper end of the curing sheet 27 is supported along the upper ends of each of these supports 29, and the circumferential partition 11 is formed by stretching the curing sheet 27 between the supports 29. The inclination of the supports 29 as described above results in the formation of the inclined circumferential partition 11 as described above.

[0028] Each support column 29 is configured to be extendable and retractable toward the inner surface 105. As a specific structural example, each support column 29 is extendable and retractable by a telescopic structure having an outer tube 29a and an inner tube 29b, and its length can be adjusted. Each outer tube 29a is attached at an angle to an extension portion of a pipe material included in the support leg 19 (FIG. 2) via a predetermined bracket, for example. The extension portion of the pipe material as described above may also serve as a support column for a handrail (not shown) surrounding the working stage 7. By adjusting the length of each support column 29, the gap between the upper edge 11a of the circumferential partition 11 and the inner surface 105 can be adjusted. By making this gap as small as possible, the working space 3 can be partitioned effectively.

[0029] In this embodiment, the circumferential partition 12 extends leftward from the left edge 7e of the work stage 7 toward the inner surface 105 of the lining concrete 103. The left edge 12a of the circumferential partition 12 forms a straight line extending in the tunnel axis direction and is positioned so as to minimize a gap in the tunnel radial direction relative to the inner surface 105. The circumferential partition 12 may be composed of a curing sheet having a configuration similar to the above-mentioned curing sheet 21 and a frame portion that supports the curing sheet. In this case, the frame portion of the circumferential partition 12 may be expandable and contractible toward the inner surface 105. Alternatively, the frame portion may be omitted. Alternatively, if the gap between the edge 7e of the work stage 7 and the inner surface 105 is sufficiently narrow, the circumferential partition 12 may be omitted.

[0030] As shown in FIGS. 1 and 2 , the mobile unit 1 includes a protective fence 31 disposed on the right side of the support base 15. The protective fence 31 includes a frame 33 made of pipes or the like connected to the support legs 19, and a protective plate 35 fixed to the right side of the frame 33. The protective plate 35 is disposed approximately perpendicular to the tunnel width direction and is located to the left of the center of the tunnel 101 in the width direction. The protective plate 35 is located approximately vertically below the edge 7d of the work stage 7 at the tunnel width direction end. The dimensions of the protective plate 35 are approximately 10 m in the tunnel axial direction and 2 m in height, and the protective plate 35 is composed of multiple plates. The lower end of the protective plate 35 is located slightly above the tunnel bottom 107. This protective fence 31 prevents the falling object from entering the right lane, even if it falls from the work space 3.

[0031] Wheels 37 are provided at the lower end of the frame portion 33 of the protective fence portion 31, and the protective fence portion 31 is in contact with the tunnel bottom surface 107 via the wheels 37. When the truck 17 is driven to move the mobile unit 1 within the tunnel 101, the wheels 37 roll on the tunnel bottom surface 107, causing the protective fence portion 31 to move along with the support base 15.

[0032] Next, a repair method for the lining concrete 103 using the mobile unit 1 will be described. This repair method includes a step of applying a resin coating agent to the surface of the lining concrete at the work target area 105a. The coating agent is, for example, an epoxy-based resin coating agent. The application of such a coating agent may be performed as a finishing touch after, for example, chipping the lining concrete 103, drilling a core, or filling the concrete. The application of such a coating agent reinforces the lining concrete 103. Since this type of coating agent has the characteristic of not hardening if the humidity and temperature of the work space 3 are not appropriate, temperature and humidity control is required during application. In other words, to properly harden the coating agent, it is necessary to properly adjust the humidity and / or temperature of the work space 3 before and after the application work. Generally, when applying this type of coating agent, if the humidity and / or temperature are not appropriate, the coating will turn white or lose its luster, so temperature adjustment and humidity reduction are required.

[0033] For example, in the case of an epoxy resin coating material, the humidity of the environment after application must be 85% or less, preferably 60% or less, and more preferably 30% or less. The temperature of the environment after application must be 5°C to 40°C, and preferably 10°C to 30°C. Therefore, without any measures, even if the temperature conditions within the work space 3 are relatively easily satisfied, the humidity within the work space 3 is often too high. Therefore, in order to reduce the humidity, particularly within the work space 3, the repair method of this embodiment includes a mobile unit assembly step S501, a mobile unit movement step S503, a work space formation step S505, a gap adjustment step S507, an air conditioning step S509, a coating step S511, and a curing step S513, as shown in the flowchart of FIG. 5 . Each step is described below.

[0034] [Moving unit assembly process S501] In the mobile unit assembly process S501, the mobile unit 1 is assembled near the entrance of the tunnel 101. That is, the support legs 19 are assembled on the loading platform 17a of the truck 17, and a frame including the work stage 7 and support columns 23, 29 is assembled above the support legs 19, and protective sheets 21, 27 are attached to the support columns 23, 29, etc. In assembling the mobile unit 1, it is preferable to first complete the protective fence section 31 on the right side of the truck 17. This makes it possible to prevent the fallen object from entering the right lane by the protective fence section 31 in the unlikely event that something falls while assembling the partition section 13. For the same reason, it is also preferable to attach the protective sheet 27 before the protective sheet 21 when assembling the partition section 13.

[0035] [Mobile unit moving step S503 and working space forming step S505] Thereafter, in a mobile unit moving step S503 and a work space forming step S505, the truck 17 is driven inside the tunnel 101 to move the entire mobile unit 1 toward the work target location 105a. Thereafter, the partition 13 is positioned to cover the work target location 105a by adjusting the position of the truck 17, etc., and the mobile unit 1 is installed. This forms a work space 3 that faces the work target location 105a and is separated from the outside.

[0036] [Gap adjustment step S507] Thereafter, in a gap adjustment process S507, the length of each support column 23 of the axial partitions 9,9 is adjusted so that the upper edge 9a of the axial partition 9 nearly abuts the inner surface 105, thereby adjusting the gap between the axial partition 9 and the inner surface 105 to be as small as possible. Similarly, the length of each support column 29 of the circumferential partition 11 is adjusted so that the upper edge 11a of the circumferential partition 11 nearly abuts the inner surface 105, thereby adjusting the gap between the circumferential partition 11 and the inner surface 105 to be as small as possible. As a result, the gap between the partition 13 and the inner surface 105 is made as small as possible, and a work space 3 that is partitioned off in a closed manner from the outside is formed.

[0037] [Air conditioning process S509] As mentioned above, if the humidity and temperature of the work space 3 are not appropriate, the resinous coating material applied to the work target area 105a in the application step described below may not harden. While the temperature conditions are relatively easy to satisfy within the tunnel 101, the humidity tends to be too high. Therefore, in the air conditioning step S509, the air conditioner 39 is operated to reduce the humidity within the work space 3, thereby dehumidifying the work space 3. The air conditioner 39 may be a dehumidifier installed within the work space 3. Furthermore, since the temperature within the work space 3 may be increased to reduce the humidity within the work space 3, the air conditioner 39 may be a heater installed within the work space 3. Furthermore, the air conditioner 39 may be a blower that blows warm air into the work space 3. The air conditioner 39 may also be configured by combining the dehumidifier, heater, and blower described above.

[0038] In this air conditioning step, not only the humidity but also the temperature in the work space 3 may be adjusted. The air conditioning device 39 may be equipped with a control means for controlling the humidity and temperature in the work space 3 to desired values. The air conditioning device 39 may be installed in the above-mentioned movable unit assembling step S501. In order to sufficiently dehumidify the work space 3, the subsequent application step S511 is to be performed the day after the start of the air conditioning step S509, and the air conditioning device 39 is operated continuously until the completion of the curing step S513, which will be described later.

[0039] [Coating step S511] The coating step S511 is performed after the air conditioning step S509 is started. In the coating step S511, a worker on the work stage 7 performs a coating operation to apply a resin coating agent to the work target area 105a. In this embodiment, an epoxy resin coating agent is used. The air conditioning step S509 continues during the coating step S511, and the air conditioner 39 operates continuously.

[0040] [Curing process S513] Furthermore, even after the application step S511 is completed, the air conditioning step S509 continues and the air conditioner 39 operates continuously, for example, until the following day. This maintains appropriate humidity and temperature within the work space 3. In the curing step S513, the application agent applied to the work target location 105a in the application step S511 is placed in the environment of the work space 3 that has been air-conditioned as described above, thereby promoting hardening of the application agent.

[0041] Thereafter, the above-described steps from the mobile unit moving step S103 to the curing step S513 are repeated until repairs are completed for all work locations 105a within the tunnel 101. In this case, after the curing step S513 is completed and before the mobile unit 1 is moved in the mobile unit moving step S503, the extension and contraction of the supports 23, 29 may be adjusted as necessary to move the axial partition 9 and the circumferential partition 11 away from the inner surface 105.

[0042] Next, the effects of the repair method described above will be explained. In this repair method, the application step S511 is performed in the work space 3 that has been air-conditioned in the air-conditioning step S509, and a resinous coating material is applied to the work target area 105a. Therefore, the work space 3 is maintained at an appropriate humidity and temperature during the application work, and the resinous coating material then hardens normally. As a result, the repair work can proceed smoothly. In this repair method, the work target area 105a is reinforced by applying the coating material.

[0043] Furthermore, in the gap adjustment step S507, the lengths of the supports 23 of the axial partitions 9,9 and the supports 29 of the circumferential partitions 11 are adjusted to reduce the gap between the partitions 13 and the inner surface 105, thereby properly dividing the work space 3. This allows for efficient air conditioning within the work space 3. Furthermore, reducing the gap between the partitions 13 and the inner surface 105 reduces the amount of objects falling from the work space 3 to the outside. Furthermore, since the support base 15 is equipped with tracks 17, the mobile unit 1 can be easily moved by running the tracks 17 on the tunnel bottom surface 107 in the mobile unit moving step S503.

[0044] Furthermore, because the circumferential partition 11 is inclined, the upper end of the work space 3 is positioned to extend from the center of the tunnel 101 to the right by, for example, about 50 cm. Therefore, when the mobile unit 1 is moved to the right lane in a position symmetrical to the current state (as shown in Figure 2), the circumferential center of the ceiling of the tunnel 101 can be included in the work space 3, making repair work possible in that circumferential center portion. Furthermore, because the circumferential partition 11 is inclined, even if the upper end of the work space 3 extends into the right lane, the lower end of the work space 3 is located within the left lane. Therefore, it is easy to ensure space above the right lane (construction gauge). Furthermore, because the upper end of the work space 3 extends into the right lane, there is a concern that objects may fall from the work space 3 into the right lane. However, the protective sheet 27 on the circumferential partition 11 prevents such objects from falling. In order to prevent such falling objects, it is preferable that the protective sheet 21 of the axial partitions 9,9 and the protective sheet 27 of the circumferential partitions 11 are not only airtight but also strong enough to prevent falling objects.

[0045] Furthermore, the repair method of this embodiment uses the mobile unit 1 when carrying out the process of applying a resinous coating agent to the work target area 105a on the inner surface 105 of the lining concrete 103. The mobile unit 1 is equipped with a partition 13 and a work stage 7, so that the work space 3 can be formed by placing the mobile unit 1 at the work target area 105a, and furthermore, the worker can work using the work stage 7, so that the repair of the inner surface 105 of the lining concrete 103 can be carried out efficiently.

[0046] The present invention can be implemented in various forms, including the above-described embodiment, with various modifications and improvements based on the knowledge of those skilled in the art. Furthermore, it is also possible to configure modified forms by utilizing the technical matters described in the above-described embodiment. The configurations of the respective embodiments may be used in appropriate combination.

[0047] In the repair method for the inner surface 105 of the lining concrete 103 according to the embodiment, as described above, the application of a coating agent may be performed after chipping, coring, filling, and the like of the lining concrete 103. Therefore, the movable unit 1 may be used when chipping or coring the inner surface 105 in the repair method. In this case, concrete fragments and the like generated by the chipping or coring are confined within the work space 3 and prevented from scattering to the outside. In this case, the gap between the partition 13 and the inner surface 105 may be wider than the gap described above in the embodiment. Since the gap does not need to be precisely adjusted, the extension / retraction function of the supports 23, 29 and the gap adjustment step S507 may be omitted. In this case, the curing sheets 21 of the axial partitions 9, 9 and the curing sheets 27 of the circumferential partitions 11 have sufficient strength to prevent scattering to the outside, in addition to or instead of being airtight. [Explanation of symbols]

[0048] 1...mobile unit, 3...work space, 7...work stage, 9...axial partition, 11, 12...circumferential partition, 13...partition, 15...support base (base), 21...curing sheet, 23...support (frame), 27...curing sheet, 29...support (frame), 101...tunnel, 103...lining concrete, 105...inner surface, 105a...work area.

Claims

1. A method for repairing tunnel lining concrete, comprising: a work space forming step of placing a movable unit in the tunnel, the movable unit including a base and a partition portion supported by the base and forming a work space separated from the outside, to form a work space separated from the outside relative to the inner surface of the lining concrete; an air conditioning step of adjusting the temperature and / or humidity in the working space; a coating process in which a resin coating agent is applied to the inner surface of the lining concrete in the work space air-conditioned in the air-conditioning process; A repair method including:

2. the moving body unit includes a stage supported on the base and used as a work platform; In the coating step, the coating agent is applied on the stage. The repair method according to claim 1 .

3. the stage forms a part of the partition and separates the work space from the outside, The partition section includes a pair of axial partition sections that separate the work space from the outside in the axial direction of the tunnel. The repair method according to claim 2.

4. the stage forms a part of the partition and separates the work space from the outside, The partition portion includes a circumferential partition portion that separates the work space from the outside in the circumferential direction of the tunnel. The repair method according to claim 2.

5. The partition section includes a frame and a protective sheet supported by the frame, The frame has a support column that is extendable toward the inner surface of the lining concrete, The gap adjusting step further includes adjusting the gap between the inner surface and the partition by extending and contracting the support. The repair method according to any one of claims 1 to 4.

6. The method further includes a moving unit moving step in which the base moves on the bottom surface of the tunnel to move the work space to a position facing a desired work target portion of the lining concrete. The repair method according to any one of claims 1 to 4.

7. A method for repairing tunnel lining concrete, comprising: a work space forming step of placing a movable unit in the tunnel, the movable unit including a base and a partition portion supported by the base and forming a work space separated from the outside, to form a work space separated from the outside relative to the inner surface of the lining concrete; a repair process of performing repair work on the inner surface of the lining concrete in the work space; A repair method including:

Images