Carriage for panel installation and repair / reinforcement method for existing tunnel using the same

Abstract

To provide a technique relating to a carriage for panel installation that enables mechanized construction for installing repair / reinforcement panels at arbitrary panel installation scheduled positions in a repair / reinforcement method for existing tunnels.SOLUTION: A carriage for panel installation which is applied to a method for repairing and reinforcing an existing tunnel, and is used for installing repair / reinforcement panels on an inner wall surface of the existing tunnel, comprises: a self-propelled frame which can travel inside the existing tunnel along its extending direction; and a panel installation device including a movable mounting arm mounted on the self-propelled frame, and a panel holding unit which is provided on the mounting arm, and can freely switch between a state of holding a repair / reinforcement panel and a released state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a panel installation vehicle and a repair and reinforcement method for existing tunnels using the vehicle. [Background technology]

[0002] The inward-lining method is a well-known construction method for repairing and reinforcing existing tunnels. One example of this method involves fixing repair and reinforcement panels to the inner wall surface of an existing tunnel and filling the gaps behind the panels with a filler material such as grout mortar. In some cases, inward-lining methods using repair and reinforcement panels, the panels are fixed directly to the inner wall surface of the existing tunnel. In addition, when installing reinforcing steel supports on the inner wall surface of an existing tunnel, the repair and reinforcement panels may be fixed to angle members or other members erected between the steel supports. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3211895 Summary of the Invention [Problem to be solved by the invention]

[0004] However, while conventional panel installation carts used in repair and reinforcement methods for existing tunnels have a work stage for workers, installing repair and reinforcement panels on the existing tunnel's inner wall surface has to be done manually. As a result, installing repair and reinforcement panels on the tunnel's inner wall surface requires a lot of labor and low work efficiency. Furthermore, when repairing and reinforcing existing tunnels, repair and reinforcement panels usually need to be installed from the base to the top of the tunnel's inner wall surface, so there is a need for mechanized construction technology that can install repair and reinforcement panels at any desired panel installation location.

[0005] The technology disclosed herein has been developed in consideration of the above-mentioned problems, and its purpose is to provide technology related to a panel installation cart that enables mechanized construction to install repair and reinforcement panels at any desired panel installation location in a construction method for repairing and reinforcing existing tunnels. [Means for solving the problem]

[0006] One aspect of the present disclosure is applied to a construction method for repairing and reinforcing an existing tunnel, and is a panel installation cart for installing repair and reinforcement panels on the inner wall surface of the existing tunnel, a self-propelled platform capable of traveling inside the existing tunnel along its extension direction; a panel installation device having a movable mounting arm mounted on the self-propelled platform and a panel holding unit provided on the mounting arm and capable of freely holding and releasing the repair / reinforcement panel; This is a panel installation cart equipped with:

[0007] The panel holding unit may have a suction cup capable of suction-holding the repair / reinforcement panel.

[0008] The panel holding device may have a suction cup capable of suction-holding the repair / reinforcement panel.

[0009] In addition, a repair and reinforcement method for an existing tunnel can be provided in which repair and reinforcement panels are installed on the inner wall surface of an existing tunnel using the panel installation cart described above.

[0010] The existing tunnel may be a headrace tunnel. [Effects of the Invention]

[0011] According to the present invention, a technology can be provided for a panel installation cart that enables mechanized construction to install repair and reinforcement panels at any planned panel installation location in a construction method for repairing and reinforcing existing tunnels. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a panel installation cart according to an embodiment. [Figure 2] FIG. 2 is a front view of the panel installation cart according to the embodiment. [Figure 3] FIG. 3 is a diagram illustrating an installation mode of the panel installation device according to the embodiment. [Figure 4] FIG. 4 is a diagram illustrating a panel installation device according to an embodiment. [Figure 5] FIG. 5 is a diagram illustrating a panel holding unit and a connecting unit according to the embodiment. [Figure 6] FIG. 6 is a perspective view of the controller according to the embodiment. [Figure 7] FIG. 7 is a top view of the controller according to the embodiment. [Figure 8] FIG. 8 shows the panel installation cart and panel transport cart set at predetermined positions within the tunnel. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In this embodiment, a construction method for repairing and reinforcing the inner wall surface of an existing tunnel using a panel installation cart will be described. In this embodiment, an inward-lining construction method for installing repair and reinforcement panels on the inner wall surface of an existing tunnel using a panel installation cart will be described as an example. Note that, although a headrace tunnel can be given as an example of an existing tunnel to which the panel installation cart and the repair and reinforcement construction method using the same according to this embodiment can be applied, there is no particular limitation as long as it is an existing tunnel.

[0014] <Embodiment> Fig. 1 is a perspective view of a panel installation cart 1 according to an embodiment. Fig. 2 is a front view of the panel installation cart 1 according to an embodiment. The panel installation cart 1 has a self-propelled platform 2 that can travel inside an existing tunnel in the direction of its extension, and a panel installation device 4 that is mounted on the self-propelled platform 2. Fig. 1 shows the front-rear, left-right, top-bottom directions of the panel installation cart 1.

[0015] The self-propelled platform 2 is configured as a gantry-type platform having a portal frame 21, and in the illustrated example, three portal frames 21 are interconnected via frames extending in the front-to-rear direction. As shown in Fig. 2, the self-propelled platform 2 configured as a gantry-type platform can freely store a panel transport cart 60 for transporting repair / reinforcement panels, a work vehicle 70, and the like, in the space S1 below the portal frame 21. Of course, the structure of the self-propelled platform 2 is not particularly limited.

[0016] The panel installation cart 1 has running wheels 25 on each of its front, rear, left and right sides for self-propelling within the existing tunnel. The self-propelled platform 2 also includes an upper horizontal frame 22 located at the top in the height direction, a middle horizontal frame 23 located at the middle, and a lower horizontal frame 24 located at the bottom. The upper horizontal frame 22, middle horizontal frame 23, and lower horizontal frame 24 are configured as frames that are horizontally mounted in a direction perpendicular to the height direction of the panel installation cart 1.

[0017] The self-propelled gantry 2 is provided with a work stage on which workers can perform work. In this embodiment, an upper main work stage 26 and upper side work stages 27A and 27B are provided at an upper position of the self-propelled gantry 2, and lower side work stages 28A and 28B are provided at a lower position of the self-propelled gantry 2. The upper main work stage 26 and the upper side work stages 27A and 27B are provided on the upper horizontal frame 22, and the upper side work stages 27A and 27B are provided on both the left and right sides of the upper main work stage 26. The lower side work stages 28A and 28B are provided on the lower horizontal frame 24. However, the position, size, number, and other aspects of the work stages provided on the self-propelled gantry 2 are not particularly limited. The upper side work stages 27A and 27B and the lower side work stages 28A and 28B may be configured as movable stages that can slide in the front-to-rear direction of the panel installation cart 1.

[0018] The panel installation device 4 is installed on the middle horizontal frame 23 of the self-propelled platform 2. Fig. 3 is a diagram illustrating the installation mode of the panel installation device 4 according to the embodiment. For the purpose of making it easier to understand the installation mode of the panel installation device 4, the upper part of the self-propelled platform 2 (above the middle horizontal frame 23), the upper main work stage 26, the upper side work stages 27A and 27B, etc. are omitted from the illustration. Fig. 4 is a diagram illustrating the panel installation device 4 according to the embodiment.

[0019] The panel installation device 4 includes a slider 41, a mounting arm 42, a panel holding unit 43, a connecting unit 44, and accessories and a drive source for driving each of these mechanisms. The slider 41 is fixed, for example, to the middle horizontal frame 23 of the self-propelled platform 2. More specifically, the slider 41 is fixed to the middle horizontal frame 23 in a horizontal position and disposed between the upper horizontal frame 22 and the middle horizontal frame 23. The slider 41 includes a base 411 fixed to the middle horizontal frame 23, a slide portion 412 mounted on the base 411 so as to be extendable and retractable, and a rod portion 413 mounted on the slide portion 412. X1 shown in FIG. 4 is the main axis of the slider 41. The base 411, slide portion 412, and rod portion 413 of the slider 41 are arranged coaxially with the main axis X1 as the central axis.

[0020] The slider 41 is capable of sliding the slide portion 412 along the direction of the main axis X1 relative to the base portion 411. In this embodiment, the main axis X1 of the slider 41 coincides with the front-rear direction of the panel installation cart 1, and the slide portion 412 can be extended and retracted in the direction of arrow A in Fig. 4. In addition, the rod portion 413 of the slider 41 is configured to be rotatable in forward and reverse directions (indicated by arrow B in Fig. 4) with the main axis X1 as the rotation axis.

[0021] An attachment arm 42 having a rod-like shape extending in one direction is connected to the rod portion 413 of the slider 41. In this embodiment, the attachment arm 42 includes a base rod portion 421 and an extendable rod portion 422 mounted on the base rod portion 421 so as to be extendable and contractible in the axial direction. The base rod portion 421 is a rod member connected to the rod portion 413 so as to extend in a direction perpendicular to the main axis X1 of the slider 41. In FIG. 4, symbol X2 denotes the central axis of the attachment arm 42 (hereinafter referred to as the "arm axis"). The base rod portion 421 and the extendable rod portion 422 of the attachment arm 42 are coaxially arranged. As indicated by arrow C in FIG. 4, the extendable rod portion 422 is extendable and contractible along the arm axis X2. Furthermore, when the rod portion 413 of the slider 41 rotates around the main axis X1, the attachment arm 42 connected to the rod portion 413 pivots around the main axis X1 in an interlocking manner.

[0022] 5 is a diagram illustrating a panel holding unit 43 and a connecting unit 44 according to the embodiment. The panel holding unit 43 is attached to the tip end side of the mounting arm 42 via the connecting unit 44. The connecting unit 44 is configured to include a plurality of link mechanisms, and by connecting the panel holding unit 43 to the mounting arm 42 via the connecting unit 44, the panel holding unit 43 is capable of tilting (pitching), swiveling (yawing), rotating (rolling), and sliding (offset movement).

[0023] The panel holding unit 43 is configured to be able to freely switch between holding and releasing the repair / reinforcement panel 50. The repair / reinforcement panel 50 is a surface covering panel to be installed on the inner wall surface of an existing tunnel, and may typically be formed as a curved panel having a roughly rectangular plane as shown in the figure. The repair / reinforcement panel 50 is, for example, a panel made of resin concrete. Of course, the material of the repair / reinforcement panel 50 is not particularly limited, and may be, for example, an FRP panel (fiber reinforced plastic panel) or an FRPM board (fiber reinforced plastic composite panel).

[0024] The panel holding unit 43 includes suction cups 45 for suction-holding the repair / reinforcement panel 50, and a vacuum pressure generator (not shown) for applying vacuum pressure to the suction cups 45. In this embodiment, the panel holding unit 43 includes a plurality of suction cups 45 (two in FIG. 5). However, the number, size, position, etc. of the suction cups 45 included in the panel holding unit 43 are not particularly limited.

[0025] The connecting unit 44 will be described in detail with reference to FIG. 5. The connecting unit 44 includes a first frame 441, a second frame 442, a third frame 443, a holding plate 444, and a link mechanism connecting these components. The first frame 441 is attached to the tip end of the telescopic rod portion 422 of the mounting arm 42. The second frame 442 is connected to the first frame 441 so as to be rotatable in the direction of arrow D in the figure around a rotation axis X3. The rotation axis X3 is an axis extending in a direction perpendicular to the lateral direction with respect to the arm axis X2 of the mounting arm 42 (telescopic rod portion 422). The third frame 443 is connected to the second frame 442 so as to be rotatable in the direction of arrow E in the figure around a rotation axis X4. The rotation axis X4 is an axis extending in a direction perpendicular to the up-down direction with respect to the arm axis X2 of the mounting arm 42 (telescopic rod portion 422). The holding plate 444 is a plate member that holds the panel holding unit 43. The holding plate 444 and the panel holding unit 43 held thereby are slidable laterally (in the direction of arrow F in FIG. 5) relative to the third frame 443. Furthermore, the holding plate 444 and the panel holding unit 43 held thereby are rotatable around a rotation axis X5 shown in FIG. 5 (in the direction of arrow G in FIG. 5). The rotation axis X5 extends in a direction perpendicular to the rotation axes X3 and X4.

[0026] Fig. 6 is a perspective view of the controller 8 for operating the panel installation device 4. Fig. 7 is a top view of the controller 8. Reference numeral 80 denotes a start switch. The start switch 80 is a switch for operating the start and stop of the panel installation device 4. Reference numeral 81 denotes an emergency stop button. When the emergency stop button 81 is pressed, the panel installation device 4 is brought to an emergency stop.

[0027] Reference numeral 82 denotes a panel suction / release switch. When the suction switch 82A of the panel suction / release switch 82 is pressed, the vacuum pressure generator of the panel holding unit 43 is activated. As a result, vacuum pressure is applied to the suction cups 45, allowing the repair / reinforcement panel 50 to be suctioned and held. On the other hand, when the release switch 82B is pressed, the operation of the vacuum pressure generator is stopped, and the repair / reinforcement panel 50 that was suction-held by the suction cups 45 is released. Reference numeral 83 denotes a vacuum pressure display monitor. When the vacuum pressure generator of the panel holding unit 43 is operating, the vacuum pressure display monitor displays the vacuum pressure generated by the device in real time. The number, size, and specifications of the suction cups 45 of the panel holding unit 43 can be designed depending on the weight, shape, etc. of the repair / reinforcement panel 50.

[0028] Reference numerals 84 to 87 denote first to fourth operating levers. For example, the first operating lever 84 to the third operating lever 86 are operating switches that can be tilted up, down, left, and right. The fourth operating lever 87 is an operating switch that can be tilted left and right. When the first operating lever 84 is operated up and down, the slide portion 412 of the slider 41 can be extended or retracted. On the other hand, when the first operating lever 84 is operated left and right, the rod portion 413 of the slider 41 can be rotated forward and backward, and as a result, the mounting arm 42 can be rotated left and right.

[0029] Operating the second operating lever 85 in the vertical direction extends or retracts the telescopic rod portion 422 of the mounting arm 42. On the other hand, operating the second operating lever 85 in the horizontal direction causes the second frame 442 of the connecting unit 44 to rotate in the direction of arrow D around the rotation axis X3 relative to the first frame 441, thereby causing the panel holding unit 43 to tilt (pitch) in the vertical direction.

[0030] Furthermore, when the third operating lever 86 is operated in the up-down direction, the holding plate 444 of the connecting unit 44 rotates in the direction of arrow G about the rotation axis X5, thereby performing a rolling motion of the panel holding unit 43. On the other hand, when the third operating lever 86 is operated in the left-right direction, the third frame 443 of the connecting unit 44 rotates in the direction of arrow E about the rotation axis X4 relative to the second frame 442, thereby performing a swiveling (yawing) motion of the panel holding unit 43 in the left-right direction. Furthermore, when the fourth operating lever 87 is operated in the left-right direction, the holding plate 444 of the connecting unit 44 slides laterally (in the direction of arrow F in FIG. 5) relative to the third frame 443, thereby performing an offset motion of the panel holding unit 43.

[0031] The actuator that drives the panel installation device 4 may be an electric actuator, a hydraulic actuator, or the like, and the drive source is not particularly limited. Reference numeral 88 denotes a speed adjustment knob that adjusts the rotation speed of the mounting arm 42. By operating the speed adjustment knob 88, the rotation speed of the mounting arm 42 can be increased or decreased. Reference numeral 89 denotes a speed adjustment knob that adjusts the hydraulic pump flow rate of the hydraulic actuator that drives the panel installation device 4. Of course, the configuration of the controller 8 shown in FIGS. 6 and 7 is merely an example and can be modified as appropriate. Additionally, the panel installation cart 1 is equipped with a control panel (controller) that controls the power source that drives the running wheels 25 of the self-propelled platform 2 and the drive sources that drive movable stages such as the upper side work stages 27A, 27B and the lower side work stages 28A, 28B.

[0032] The procedure for repairing and reinforcing an existing tunnel using the panel installation cart 1 according to this embodiment will now be described by way of example.

[0033] FIG. 8 shows the panel installation cart 1 and the panel transport cart 60 set in their predetermined positions within the tunnel. A repair / reinforcement panel 50 to be installed on the existing tunnel interior wall is placed on the panel transport cart 60. A worker adjusts the position and posture of the mounting arm 42 of the panel installation device 4 via the controller 8, causing the panel holding unit 43 to suction-hold the repair / reinforcement panel 50 placed on the panel transport cart 60. Specifically, for example, by operating the control levers 84-87 of the controller 8, the suction cup 45 of the panel holding unit 43 attached to the tip of the mounting arm 42 is positioned on the inner surface (surface covering surface) 50A (see FIG. 5) of the repair / reinforcement panel 50. Typically, as shown in FIG. 8, the posture of the mounting arm 42 is adjusted so that the arm axis X2 of the mounting arm 42 is oriented vertically. In this state, the suction switch 82A of the controller 8 is pressed to activate the vacuum pressure generating device of the panel holding unit 43. The repair / reinforcement panel 50 can be held by suction on the suction cups 45 of the knit 43.

[0034] As described above, with the repair / reinforcement panel 50 held by suction on the suction cups 45 of the panel holding unit 43, the posture of the mounting arm 42 is changed, and the repair / reinforcement panel 50 is moved to a predetermined panel installation position. Then, with the repair / reinforcement panel 50 held by the panel holding unit 43, the repair / reinforcement panel 50 is installed on the tunnel inner wall surface. As shown in FIG. 5 , the repair / reinforcement panel 50 has mounting holes 51 at multiple locations for installing the repair / reinforcement panel 50 on the tunnel inner wall surface. The mounting holes 51 are provided at positions such that the repair / reinforcement panel 50 can be fixed to the tunnel inner wall surface while held by the panel holding unit 43. In other words, the mounting holes 51 are positioned so that the mounting holes 51 will not be blocked by the suction cups 45 or the like when the repair / reinforcement panel 50 is held by the panel holding unit 43.

[0035] In the repair and reinforcement method for an existing tunnel according to this embodiment, the repair and reinforcement panel 50 may be attached directly to the inner wall surface of the existing tunnel using anchors or the like, or the repair and reinforcement panel 50 may be fixed using bolts or the like to a reinforcing steel support installed along the inner wall surface of the existing tunnel or to an angle member installed between adjacent steel supports.

[0036] As described above, according to the panel installation cart 1 and the existing tunnel repair and reinforcement construction method using the same according to this embodiment, the repair and reinforcement panel 50 placed on the panel transport cart 60 or the like can be picked up by the panel installation device 4, and then the panel holding unit 43 can be moved to any desired panel installation position (see FIG. 2 ). Furthermore, unlike the conventional method, it is not necessary to install the repair and reinforcement panel 50 while holding it manually; instead, the repair and reinforcement panel 50 can be attached to the tunnel inner wall surface while being held by the panel holding unit 43. This reduces the manual workload when installing the repair and reinforcement panel 50 on the tunnel inner wall surface, thereby improving work efficiency. Furthermore, according to the panel installation cart 1 according to this embodiment, while the repair and reinforcement panel 50 is suction-held by the panel holding unit 43, the repair and reinforcement panel 50 can be moved by the mounting arm 42 to any desired panel installation position on the tunnel inner wall surface, from the base to the apex. This makes it possible to provide a mechanized construction technology that can install the repair and reinforcement panel 50 at any desired panel installation position.

[0037] Furthermore, the panel holding unit 43 according to this embodiment has suction cups 45 that can suck and hold the repair / reinforcement panel 50 by vacuum pressure. Therefore, with the inner surface (surface covering surface) 50A of the repair / reinforcement panel 50 sucked and held by the suction cups 45 of the panel holding unit 43, the repair / reinforcement panel 50 can be moved to the intended panel installation position, and then the repair / reinforcement panel 50 can be easily fixed in place.

[0038] The above describes embodiments of the present invention, but these are merely examples, and the present invention is not limited to these. Various modifications based on the knowledge of those skilled in the art are possible as long as they do not deviate from the spirit of the claims. [Explanation of symbols]

[0039] 1 Panel installation cart 2. Self-propelled platform 4. Panel installation device 8. Controller 41 Slider 42 Mounting arm 43 Panel holding unit 44 Connecting unit 50···Repair and reinforcement panels

Claims

1. This is a panel installation cart that is applied to a construction method for repairing and reinforcing existing tunnels and is used to install repair and reinforcement panels on the inner wall surface of the existing tunnel. a self-propelled platform capable of traveling inside the existing tunnel along its extension direction; a panel installation device including a movable mounting arm mounted on the self-propelled platform, and a panel holding unit provided on the mounting arm and capable of freely holding and releasing the repair / reinforcement panel; A panel installation cart comprising:

2. the panel holding unit has a suction cup capable of suction-holding the repair / reinforcement panel; The panel installation dolly according to claim 1.

3. The self-propelled platform is a gantry-type platform having a portal frame, and a panel transport cart for transporting the repair / reinforcement panel can be stored in a space below the portal frame. The panel installation dolly according to claim 1.

4. A method for repairing and reinforcing an existing tunnel, comprising installing a repair and reinforcement panel on the inner wall surface of the existing tunnel using the panel installation cart described in claim 1.

5. 5. The method for repairing and reinforcing an existing tunnel according to claim 4, wherein the existing tunnel is a headrace tunnel.

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