Automatic spraying and plastering construction cart and method for updating and repairing existing tunnel using the same

Abstract

To provide a technology relating to an automatic spraying and plastering construction cart that can efficiently perform spraying work for spraying mortar on an inner peripheral surface of an existing tunnel and plastering work for leveling the sprayed surface.SOLUTION: An automatic spraying and plastering construction cart comprises a self-propelled spraying and plastering equipment stand with running wheels that can run inside an existing tunnel along its extending direction, an automatic spraying device that is mounted on the spraying and plastering equipment stand and automatically sprays mortar onto an inner peripheral surface of the existing tunnel, and an automatic plastering device that is mounted on the spraying and plastering equipment stand and automatically levels the mortar sprayed onto the inner peripheral surface by the automatic spraying device.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an automatic spraying / plastering cart and a method for updating and repairing an existing tunnel using the same. [Background technology]

[0002] In construction work to renew or repair an existing tunnel, spraying work (spraying construction) is sometimes performed, in which mortar is sprayed onto the inner surface of the tunnel, and plastering work (plastering construction) is performed to smooth and level the sprayed surface (mortar surface). Conventionally, for example, the spraying work and plastering work have been performed manually by workers on the work platform (stage) of a work cart. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3837655 [Patent Document 2] Japanese Patent Application Publication No. 6-81595 [Patent Document 3] Japanese Patent Application Publication No. 58-191900 Summary of the Invention [Problem to be solved by the invention]

[0004] When spraying and plastering work is done manually, it requires a lot of labor from the workers, which can lead to a decrease in work efficiency and an increase in labor costs.

[0005] The above Patent Documents 1 to 3 disclose techniques for spraying concrete when constructing a new tunnel in the ground using a tunnel boring machine, but these techniques cannot be applied to the renewal and repair of existing tunnels.

[0006] The technology disclosed herein has been made in consideration of the above-mentioned problems, and its purpose is to provide technology relating to an automatic spraying / plastering construction cart that can efficiently perform spraying work, in which mortar is sprayed onto the inner surface of an existing tunnel, and plastering work, in which the sprayed surface is leveled. [Means for solving the problem]

[0007] One aspect of the present disclosure is an automatic spraying and plastering cart that is applied to the renewal and repair work of existing tunnels, a self-propelled spraying / plastering device stand having running wheels that can run inside the existing tunnel along its extension direction; an automatic spraying device mounted on the spraying / plastering device stand and automatically spraying mortar onto the inner surface of the existing tunnel; an automatic plastering device mounted on the spraying / plastering device stand and automatically leveling the mortar sprayed onto the inner peripheral surface by the automatic spraying device; It is an automatic spraying and plastering construction cart equipped with the following.

[0008] The automatic plastering device may be installed downstream of the automatic spraying device on the front-to-rear axis of the spraying / plastering device stand.

[0009] The automatic spraying device and the automatic plastering device may be disposed adjacent to each other in the front-to-rear axial direction of the spraying / plastering device stand.

[0010] The automatic spraying device includes a spraying machine body having a mortar spraying nozzle, and and an arch-shaped first guide rail that holds the spray machine body and defines a path along which the spray machine body moves along the inner circumferential surface, The automatic plastering device may have a leveling machine body having a mortar leveling plate, and an arch-shaped second guide rail that holds the leveling machine body and defines a trajectory when the leveling machine body is moved along the inner peripheral surface.

[0011] The first guide rail and the second guide rail may extend along the left-right axis direction of the spraying / plastering apparatus stand.

[0012] The automatic spraying device may be capable of spraying mortar using the spray nozzle while sliding the spray nozzle back and forth in the front-to-back axial direction of the spraying / plastering device stand at a predetermined nozzle stroke width.

[0013] The blade width of the leveling plate in the front-to-rear axial direction of the spraying / plastering apparatus stand may be equal to the nozzle stroke width.

[0014] Another aspect of the present disclosure is a method for updating and repairing an existing tunnel, in which the above-mentioned automatic spraying and plastering cart is used to perform automatic spraying and plastering of mortar on the inner surface of the existing tunnel.

[0015] Another aspect of the present disclosure is an automatic spraying / plastering construction cart system comprising the above-mentioned automatic spraying / plastering construction cart and a mortar supply cart that supplies mortar to the automatic spraying device mounted on the automatic spraying / plastering construction cart. [Effects of the Invention]

[0016] According to the present invention, it is possible to provide technology relating to an automatic spraying / plastering construction cart that can efficiently perform spraying work, in which mortar is sprayed onto the inner surface of an existing tunnel, and plastering work, in which the sprayed surface is leveled. [Brief explanation of the drawings]

[0017] [Figure 1] Figure 1 is a schematic diagram of the automatic spraying and plastering construction cart system viewed from the side. [Figure 2] Figure 2 is a schematic diagram of the automatic spraying and plastering construction cart viewed from the left side. [Figure 3] Figure 3 is a schematic diagram of the automatic spraying and plastering construction cart viewed from above. [Figure 4] FIG. 4 is a view taken along the line AA in FIG. [Figure 5] FIG. 5 is a diagram illustrating an automatic spraying device. [Figure 6] FIG. 6 is a view taken along the arrow BB in FIG. [Figure 7] FIG. 7 is a diagram illustrating the leveling machine body and its peripheral structure. [Figure 8] FIG. 8 is a diagram illustrating a modified example of the leveling plate in the leveling machine body. [Figure 9] FIG. 9 is a diagram illustrating a modified example of the automatic spraying / plastering construction cart. [Figure 10] FIG. 10 is a diagram for explaining the implementation status of automatic spraying construction and automatic plastering construction. [Figure 11] FIG. 11 is a diagram for explaining the implementation status of automatic spraying construction and automatic plastering construction. [Figure 12] FIG. 12 is a diagram showing an embodiment of an automatic spraying / plastering construction cart system. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In this embodiment, an automatic spraying / plastering construction vehicle and an existing tunnel renewal / repair method using the same, which are applied to a wet construction method for renewing / repairing an existing tunnel, will be described. The mobile construction vehicle is a vehicle used to automatically carry out (mechanized construction) both the spraying work of spraying mortar along the inner surface of an existing tunnel to be renovated or repaired (spraying work), and the plastering work of smoothing and leveling the sprayed surface (mortar surface) (plastering work). There are no particular restrictions on the existing tunnel to be renovated or repaired, but the following explanation will use a headrace tunnel as an example.

[0019] <Embodiment> FIG. 1 is a schematic diagram of an automated spraying / plastering cart system 1 according to an embodiment, viewed from the side. The automated spraying / plastering cart system 1 includes an automated spraying / plastering cart 100 and a mortar supply cart 500. The automated spraying / plastering cart 100 and the mortar supply cart 500 each have running wheels, and can travel autonomously along the extension direction of the existing tunnel (tunnel axis direction) within the interior space of the existing tunnel to be renovated or repaired (on tunnel floor surface IV). The automated spraying / plastering cart system 1 moves the automated spraying / plastering cart 100 and the mortar supply cart 500 along the "construction progress direction" in the tunnel axis direction, and renovates or repairs the existing tunnel along the tunnel extension direction while moving sequentially from one construction site to another. The automatic spraying / plastering construction cart system 1 performs automatic spraying of mortar and automatic plastering of the arch-shaped inner peripheral surface TF of an existing tunnel while the automatic spraying / plastering construction cart 100 and the mortar supply cart 500 are stopped from traveling. In this specification, the forward and backward directions of the automatic spraying / plastering construction cart 100 and the mortar supply cart 500 are described based on the "construction progress direction" in the tunnel axial direction.

[0020] Fig. 2 is a schematic diagram of the automatic spraying / plastering construction vehicle 100 viewed from the left side. Fig. 3 is a schematic diagram of the automatic spraying / plastering construction vehicle 100 viewed from above. Fig. 4 is a view taken along the arrow AA in Fig. 2.

[0021] The automatic spraying device 110 is disposed on the front side of the automatic plastering cart 100, and the automatic plastering device 200 is disposed on the rear side. In other words, the automatic spraying device 110 is mounted on the front side of the automatic spraying cart 100, and the automatic plastering device 200 is mounted on the rear side of the automatic spraying device 110. Note that although Figures 1 and 3 show the up-down, front-rear, left-right directions of the automatic spraying cart 100, the directions shown in the figures merely indicate the relative positional relationships of the elements that make up the automatic spraying cart 100.

[0022] The automatic spraying / plastering construction cart 100 has a spraying / plastering device stand 130 on which the automatic spraying device 110 and the automatic plastering device 200 are mounted. The spraying / plastering device stand 130 is configured as a so-called gantry-type stand and includes left and right lower vertical beam frames 131A, 131B extending in the front-to-rear direction of the spraying / plastering device stand 130, and three portal frames 132A-132C erected from the lower vertical beam frames 131A, 131B. The lower vertical beam frames 131A, 131B are located at the bottom of the spraying / plastering device stand 130 and are arranged parallel to each other. Note that in the figure, symbol X1 indicates a front-to-rear axis running vertically through the spraying / plastering device stand 130, and symbol Y1 indicates a left-to-right axis Y1 running across the spraying / plastering device stand 130. The left-to-right axis Y1 is perpendicular to the front-to-rear axis X1. The lower vertical beam frames 131A, 131B of the spraying / plastering equipment stand 130 extend parallel to the front-to-rear axis X1. Also, symbol Z1 is the up-down axis of the spraying / plastering equipment stand 130, and is perpendicular to the front-to-rear axis X1 and the left-to-right axis Y1.

[0023] In the illustrated example, a front portal frame 132A stands upright at the front end side of the lower vertical beam frames 131A, 131B, a middle portal frame 132B stands upright at the middle part in the front-to-rear direction of the lower vertical beam frames 131A, 131B, and a rear portal frame 132C stands upright at the rear end side of the lower vertical beam frames 131A, 131B. Each of the portal frames 132A to 132C has a pair of support frames FR1 standing upright vertically from the lower vertical beam frames 131A, 131B, and an upper cross beam frame FR2 connecting the pair of support frames, thereby forming a portal shape. The upper cross beam frame FR2 of each of the portal frames 132A to 132C is made up of a sprayed and left It extends parallel to the left-right axis Y1 of the government equipment stand 130.

[0024] The spraying / plastering equipment stand 130 further includes upper vertical beam frames 133A and 133B that connect the upper horizontal beam frames FR2 of each of the portal frames 132A to 132C. The upper vertical beam frames 133A and 133B are arranged in a straight line and extend parallel to the lower vertical beam frames 131A and 131B along the front-to-rear direction of the spraying / plastering equipment stand 130. The upper vertical beam frame 133A connects the upper horizontal beam frames FR2 of the front portal frame 132A and the middle portal frame 132B. The upper vertical beam frame 133B connects the upper horizontal beam frames FR2 of the middle portal frame 132B and the rear portal frame 132C. The upper vertical beam frames 133A, 133B are provided at positions eccentric to the left of the center position in the width direction (left-right axis Y1 direction) of the spraying / plastering apparatus stand 130. However, the structure of the spraying / plastering apparatus stand 130 is not particularly limited as long as it can mount the automatic spraying apparatus 110 and the automatic plastering apparatus 200.

[0025] The spraying / plastering equipment stand 130 is equipped with running wheels (running tires) 134 at the four corners, front, rear, left and right, and can move autonomously through the existing tunnel along the tunnel axis direction using the running wheels 134. Note that it is not necessary for all of the running wheels 134 of the spraying / plastering equipment stand 130 to be drive wheels, and some of them may be driven wheels. Also, reference numeral 134A denotes the front wheels (front running wheels), and 134B denotes the rear wheels (rear running wheels).

[0026] As described above, the spraying / plastering device stand 130 is configured as a gantry-type self-propelled stand. The automatic spraying / plastering construction cart 100 has the automatic spraying device 110 installed in the front section S1 formed between the front portal frame 132A and the intermediate portal frame 132B of the spraying / plastering device stand 130. Furthermore, the automatic plastering device 200 is installed in the rear section S2 formed between the intermediate portal frame 132B and the rear portal frame 132C.

[0027] The spraying / plastering device platform 130 is equipped with a travel motor, and operation of the travel motor enables various travel modes, such as forward and reverse. For example, the automatic spraying / plastering construction cart 100 may be equipped with a travel controller (e.g., a pendant switch) for controlling the travel of the spraying / plastering device platform 130, and operation of the travel controller may enable the spraying / plastering device platform 130 to travel forward, backward, make an emergency stop, or switch travel patterns. The travel pattern can be switched, for example, between a drive system that drives the front wheels of the spraying / plastering device platform 130, a drive system that drives only the left wheels, or a drive system that drives only the right wheels. In this embodiment, puncture-proof tires are used for the travel wheels 134, but this is not particularly limited.

[0028] The automatic spraying device 110 includes a spray machine main body 140 and a pair of first guide rails 150A, 150B on which the spray machine main body 140 is mounted. The pair of first guide rails 150A, 150B are rail-shaped guide members that define the path along which the spray machine main body 140 moves (drives) along the first guide rails 150A, 150B. As shown in FIG. 3, the first guide rail 150A is installed at a front position in the front section and is fixed to the front portal frame 132A via a support frame FR3. The first guide rail 150B is installed at a rear position in the front section and is fixed to the middle portal frame 132B via a support frame FR3. The shape of the support frame FR3 shown in FIG. 4 is an example and can be modified as appropriate. In FIG. 4, the pair of first guide rails 150A, 150B have the same arch shape in a side view along the front-rear axis X1. More specifically, the pair of first guide rails 150A, 150B are configured as rail members having an arch shape that roughly matches the shape of the inner circumferential surface TF of the existing tunnel to be renovated or repaired. is provided in an arch shape extending along the width direction (direction of the left-right axis Y1) of the spraying / plastering apparatus stand 130.

[0029] FIG. 5 is a diagram illustrating the automatic spraying device 110. A pair of first guide rails 150A, 150B are arranged facing each other with a gap in the direction of the front-rear axis X1 (front-rear direction) of the spraying / plastering device stand 130. The spraying machine main body 140 is held by the pair of first guide rails 150A, 150B so as to span between them. Reference numeral 141 denotes a housing cover for the spraying machine main body 140, and has, for example, a box shape. The housing cover 141 holds various components that make up the spraying machine main body 140. In the following description, the direction along the front-rear axis X1 of the spraying machine main body 140 (housing cover 141) mounted between the pair of first guide rails 150A, 150B will be referred to as the "width direction."

[0030] The pair of first guide rails 150A, 150B are configured to include rail portions Rp1, Rp2 having an arch shape, racks Rg1, Rg2 provided along the rail portions Rp1, Rp2, and outer ribs Ro1, Ro2 provided on the widthwise outer sides of the rail portions Rp1, Rp2. The racks Rg1, Rg2 are long rail-shaped gears that extend along the arch shapes of the rail portions Rp1, Rp2. The outer ribs Ro1, Ro2 are provided adjacent to the outside of the rail portions Rp1, Rp2 based on the width direction of the spray machine body 140, and have an arch shape similar to that of the rail portions Rp1, Rp2.

[0031] The spray machine main body 140 includes a first shaft 142 and a second shaft 143 extending in the width direction (front-rear axis X1 direction) of the housing cover 141, and a drive motor 144 that rotates and drives these shafts 142, 143. The drive motor 144 may be, for example, a gear motor, and rotates and drives the first shaft 142 and the second shaft 143 in synchronization. The drive motor 144 is also capable of rotating and driving the first shaft 142 and the second shaft 143 in forward and reverse directions.

[0032] Both ends of the first shaft 142 and the second shaft 143 are exposed to the outside of the cover through insertion holes formed in the side surfaces of the housing cover 141. Cylindrical gear-shaped pinions 142A and 142B are provided on both ends of the first shaft 142. The pinions 142A and 142B of the spray machine body 140 are meshed with racks Rg1 and Rg2 of the first guide rails 150A and 150B, respectively. The second shaft 143 is also provided with anti-slip rollers 143A and 143B on both ends that press the spray machine body 140 against the first guide rails 150A and 150B to prevent the spray machine body 140 from falling off the rail portions Rp1 and Rp2 of the first guide rails 150A and 150B. The anti-slip rollers 143A and 143B have recesses 145 that receive the outer ribs Ro1 and Ro2. When the second shaft 143 is driven to rotate, the anti-fall-off rollers 143A, 143B can slide on the outer ribs Ro1, Ro2 with the outer ribs Ro1, Ro2 received in the recesses 145.

[0033] The spray machine main body 140 further includes a spray nozzle unit 160. The spray nozzle unit 160 includes a spray nozzle 161 that sprays mortar, and a slide unit 162 that holds the spray nozzle 161 and moves the spray nozzle 161 back and forth along the width direction (the direction of the front-rear axis X1) of the spray machine main body 140. The slide unit 162 may include, for example, a linear movement guide rail 163 that extends along the width direction (the direction of the front-rear axis X1) of the spray machine main body 140, a movable block 164 that is attached so as to be able to slide along the linear movement guide rail 163, a nozzle holder 165 that is attached to the movable block 164 and that fixes the spray nozzle 161, and a drive mechanism 166 that linearly moves the movable block 164 along the linear movement guide rail 163.

[0034] A bearing or other bearing member may be interposed between the movable block 164 and the linear guide rail 163 to ensure smooth sliding motion relative to the linear guide rail 163. The drive mechanism 166 may include a suitable motor and a conversion mechanism that converts the motor's rotational force into linear sliding motion of the movable block 164. Such a conversion mechanism is not particularly limited, and may employ mechanisms such as a ball screw or belt. Also, the symbol Wn shown in FIG. 5 denotes the stroke width (nozzle stroke width) when the slide unit 162 of the spray nozzle unit 160 slides the spray nozzle 161 back and forth. This nozzle stroke width Wn corresponds to the spraying width in the tunnel axial direction (the direction of the front-rear axis X1) that can be sprayed onto the inner surface TF in a single automatic spraying operation using the automatic spraying / plastering cart 100 (automatic spraying device 110). The nozzle stroke width Wn (mortar spraying width) is not particularly limited, but may be approximately one meter, for example.

[0035] The automatic spraying device 110 configured as described above can move the spraying machine main body 140 along the rail portions Rp1, Rp2 of the arch-shaped first guide rails 150A, 150B by operating the drive motor 144. The automatic spraying device 110 can also spray mortar using the spraying nozzle 161 by sliding the spraying nozzle 161 back and forth along the front-to-rear axis X1 of the spraying / plastering device stand 130 at a predetermined nozzle stroke width. As an example, when the automatic spraying device 110 automatically sprays mortar, the spraying machine main body 140 is moved along the first guide rails 150A, 150B over a reference section from the spraying start position indicated by symbol Ps to the spraying end position indicated by symbol Pe in FIG. 4, while the spraying nozzle 161 is moved back and forth along the width direction (the front-to-rear axis X1 direction) of the spraying machine main body 140 to spray the mortar. This allows automatic spray application of mortar to the hatched areas to be sprayed on the inner circumferential surface TF shown in FIG.

[0036] In the above description, automatic spraying of mortar is performed while the spraying machine body 140 is raised along the first guide rails 150A, 150B, but this is not a limitation. That is, automatic spraying of mortar onto the inner surface TF of an existing tunnel may be performed while the spraying machine body 140 is lowered along the first guide rails 150A, 150B. Also, spraying may be performed by appropriately combining an ascending process spraying process in which mortar is sprayed while the spraying machine body 140 is raised along the first guide rails 150A, 150B, and a descending process spraying process in which mortar is sprayed while the spraying machine body 140 is lowered. As an example, the above-mentioned ascending process spraying process and descending process spraying process can each be performed once by making one round trip from the lower end side to the upper end side of the first guide rails 150A, 150B, and one return trip from the upper end side to the lower end side. The automatic spraying construction may be performed by performing a total of two spraying processes, one time each. Of course, the automatic spraying construction according to this embodiment is not limited to the above example, and in the process of spraying mortar, the spraying machine main body 140 may make one and a half reciprocations, or two or more reciprocations, along the first guide rails 150A, 150B. The automatic spraying / plastering construction cart 100 has a controller for controlling the operation of the automatic spraying device 110. The controller may be a control panel provided in the automatic spraying / plastering construction cart 100.

[0037] Next, the automatic plastering device 200 will be described. The automatic plastering device 200 comprises a leveling machine main body 300, a plastering machine stand 400, etc. The plastering machine stand 400 is a stand for mounting the leveling machine main body 300, and has a pair of second guide rails 410A, 410B. The pair of second guide rails 410A, 410B have substantially the same structure as the pair of first guide rails 150A, 150B in the automatic spraying device 110 described above, and are formed as rail members having an arch shape that matches the inner circumferential surface TF of the existing tunnel to be renovated or repaired.

[0038] The plastering apparatus stand 400 is mounted on the rear section S2 of the spraying / plastering apparatus stand 130. The plastering apparatus stand 400 is mounted on the lower vertical section S2 on the right side of the spraying / plastering apparatus stand 130. The frame 420A is configured by combining a pair of frame frames 420A, 420B erected from the beam frame 131B with a plurality of cross beam frames connecting these frame frames 420A, 420B together. The frame frame 420A is located at the front side of the rear section S2 of the spraying / plastering equipment stand 130, and may be referred to as the "front frame frame" hereinafter. On the other hand, the frame frame 420B is located at the rear side of the rear section S2 of the spraying / plastering equipment stand 130, and may be referred to as the "rear frame" hereinafter. The front frame 420A and the rear frame 420B are erected along the cross section of the spraying / plastering equipment stand 130, which is defined by the left-right axis Y1 and the up-down axis Z1 of the spraying / plastering equipment stand 130.

[0039] Fig. 6 is a view taken along the arrow BB in Fig. 2. Fig. 6 depicts the rear frame 420B located at the rear of the rear section S2, but the front frame 420A and the rear frame 420B have substantially the same structure. Therefore, the front frame 420A and the rear frame 420B will be described here without distinguishing between them.

[0040] Each of the frame structures 420A, 420B is configured as a movable frame that is erected so as to be slidable on a support plate PL provided on the lower vertical beam frame 131B on the right side of the spraying / plastering apparatus stand 130. As shown in Fig. 6, the frame structures 420A, 420B have a support frame 421 for supporting the second guide rails 410A, 410B. The support frame 421 is configured by combining, from the bottom side, a column frame 422, a diagonal frame 423, a horizontal frame 424, etc., and fixes the second guide rails 410A, 410B via a mounting plate 425.

[0041] Furthermore, casters (wheels) 426 are attached to the lower ends of the pillar frames 422 of the frame frames 420A, 420B, and can slide on the upper surfaces (support surfaces) of the support plates PL installed on the lower vertical beam frames 131B. As shown in Fig. 6, the support plates PL are plate members extending horizontally on the lower vertical beam frames 131B, and protrude in the left-right direction from the lower vertical beam frames 131B. The pillar frames 422 of the frame frames 420A, 420B extend along the vertical axis Z1 of the spraying / plastering apparatus stand 130, and the horizontal frames 424 extend along the left-right axis Y1.

[0042] The frame frames 420A, 420B have an intermediate cross beam frame 427 extending from the middle of the support frame 421 (the diagonal frame 423 in the example shown in FIG. 6) toward the direction of the left-right axis Y1. As shown in FIG. 6, the intermediate cross beam frame 427 is installed horizontally at a position slightly higher than the upper cross beam frame FR2 and the upper vertical beam frame 133B of the spraying / plastering apparatus stand 130. In addition, the intermediate cross beam frames 427 of the frame frames 420A, 420B are interconnected at two points by intermediate vertical beam frames 428 extending parallel to each other along the front-rear axis X1.

[0043] The automatic plastering device 200 (plastering device stand 400) has a connecting part 430 that is connected to the connecting part 16 provided on the spraying / plastering device stand 130 side (see FIG. 6). The connecting part 430 on the automatic plastering device 200 (plastering device stand 400) side is fixed by a pair of intermediate cross beam frames 427 on the plastering device stand 400.

[0044] On the other hand, the connecting portion 16 provided on the spraying / plastering apparatus stand 130 side is fixed and supported by a pair of support frames 135 extending in the left-right axis Y1 direction from the upper vertical beam frame 133B of the spraying / plastering apparatus stand 130 (see Figures 2 and 3, etc.). The connecting portion 16 provided on the spraying / plastering apparatus stand 130 side is arranged vertically alongside the connecting portion 430 on the automatic plastering apparatus 200 (plastering apparatus stand 400) side. The connecting portion 430 of the automatic plastering apparatus 200 (plastering apparatus stand 400) is arranged vertically alongside the connecting portion 16 on the spraying / plastering apparatus stand 130 side on the vertical axis Z1. The connecting portions 16, 430 are connected so as to be rotatable (pivotable) within a predetermined range around the center of rotation Y1 and to be slidable relative to each other within a predetermined range along the left-right axis Y1. Note that a bearing member, for example, may be interposed between the connecting portions 16, 430.

[0045] Furthermore, the automatic spraying / plastering construction cart 100 is equipped with a turning cylinder 136 and a sliding cylinder 137. The turning cylinder 136 is a drive source for turning (yawing) the plastering device stand 400 (automatic plastering device 200) about a vertical axis Z1 relative to the spraying / plastering device stand 130. The sliding cylinder 137 is a drive source for sliding the plastering device stand 400 (automatic plastering device 200) relative to the spraying / plastering device stand 130 in the left-right axis Y1 direction.

[0046] The base side of the turning cylinder 136 is fixed to the support frame 135 of the spraying / plastering apparatus stand 130, and the tip side of the telescopic rod is fixed to an intermediate horizontal beam frame 429 that connects a pair of intermediate vertical beam frames 428 (see FIG. 3). Here, the rod axis of the turning cylinder 136 extends at an angle with respect to the left-right axis Y1. As a result, for example, when the telescopic rod of the turning cylinder 136 is extended, the plastering apparatus stand 400 (automatic plastering apparatus 200) rotates (yaws) to the left about the vertical axis Z1 relative to the spraying / plastering apparatus stand 130. Conversely, when the telescopic rod of the turning cylinder 136 is shortened, the plastering apparatus stand 400 (automatic plastering apparatus 200) rotates (yaws) to the right about the vertical axis Z1 relative to the spraying / plastering apparatus stand 130.

[0047] The sliding cylinder 137 has, for example, a base side fixed to the connecting frame FJ that connects the pair of support frames 135 of the spraying / plastering apparatus stand 130, and a tip side of the telescopic rod fixed to the intermediate vertical beam frame 428 (see FIG. 3). The rod axis of the sliding cylinder 137 extends parallel to the left-right axis Y1. As a result, by extending and contracting the telescopic rod of the sliding cylinder 137, the plastering apparatus stand 400 (automatic plastering apparatus 200) can be slid relative to the spraying / plastering apparatus stand 130 in the left-right axis Y1 direction (hereinafter referred to as "lateral sliding"). For example, by extending the telescopic rod of the sliding cylinder 137, the plastering apparatus stand 400 (automatic plastering apparatus 200) slides to the right along the left-right axis Y1. On the other hand, by shortening the telescopic rod of the slide cylinder 137, the plastering apparatus stand 400 (automatic plastering apparatus 200) slides to the left along the left-right axis Y1.

[0048] Furthermore, as described above, the plastering apparatus stand 400 has casters 426 at the lower ends of the column frames 422 of the frame frames 420A, 420B, and therefore can slide on the support plate PL installed on the spraying / plastering apparatus stand 130. This structure allows the plastering apparatus stand 400 (automatic plastering apparatus 200) to smoothly slide sideways or turn relative to the spraying / plastering apparatus stand 130.

[0049] Next, the leveling machine main body 300 of the automatic plastering apparatus 200 will be described. FIG. 7 is a diagram illustrating the leveling machine main body 300 and its peripheral structure. The pair of second guide rails 410A, 410B are rail-shaped guide members that define the trajectory along which the leveling machine main body 300 moves (drives). The second guide rail 410A is installed on a front frame 420A of the plastering apparatus stand 400. The second guide rail 410B is installed on a rear frame 420B of the plastering apparatus stand 400. The pair of second guide rails 410A, 410B are arranged opposite each other with a gap in between in the direction of the front-rear axis X1 (front-rear direction) of the spraying / plastering apparatus stand 130, and the leveling machine main body 300 is held by the pair of 410A, 410B so as to span between them. The pair of second guide rails 410A, 410B are provided so as to extend in an arch shape along the width direction (the left-right axis Y1 direction) of the spraying / plastering apparatus stand 130.

[0050] Reference numeral 310 denotes a frame body of the leveling machine main body 300, and has, for example, a box shape. The frame body 310 holds various components that constitute the leveling machine main body 300. In the following description, the direction along the front-rear axis X1 of the leveling machine main body 300 (frame body 310) installed between a pair of second guide rails 410A, 410B will be referred to as the "width direction," and the direction perpendicular to the width direction will be referred to as the "front-rear direction." The "width direction" and "front-rear direction" referred to here refer to the respective directions when the leveling machine main body 300 (frame body 310) is used as the reference.

[0051] As described above, the second guide rails 410A, 410B have substantially the same structure as the first guide rails 150A, 150B of the automatic spraying device 110, and a detailed description of their structure will be omitted where appropriate. The leveling machine main body 300 also shares some of its structure with the spraying machine main body 140, and is equipped with the same first shaft 142, second shaft 143, drive motor 144, etc. as the spraying machine main body 140. The first shaft 142, second shaft 143, and drive motor 144 have been described above, and a detailed description thereof will be omitted here. In the leveling machine main body 300 as well, the drive motor 144 can synchronously drive the first shaft 142 and second shaft 143 to rotate forward and reverse.

[0052] The leveling machine main body 300 includes a leveling plate 320, support rods 330 that support the leveling plate 320, and a vibration mechanism 340 that vibrates the leveling plate 320 via the support rods 330. The vibration mechanism 340 vibrates the leveling plate 320 at a predetermined frequency and stroke along the extension direction of the support rods 330. When the vibration mechanism 340 is activated, the leveling plate 320 vibrates along the front-rear direction of the leveling machine main body 300. The specific structures of the vibration mechanism 340 and the support rods 330 are not particularly limited as long as they can vibrate the leveling plate 320 in the front-rear direction of the leveling machine main body 300. The vibration mechanism 340 may be configured to include an eccentric motor or an appropriate transmission device.

[0053] As described above, the automatic plastering device 200 according to this embodiment can move the leveling machine main body 300 along the rail portions Rp1, Rp2 of the arch-shaped second guide rails 410A, 410B by operating the drive motor 144. For example, when performing automatic mortar plastering using the automatic plastering device 200, the leveling machine main body 300 is moved along the second guide rails 410A, 410B while vibrating the leveling plate 320 over a reference section from the plastering start position indicated by symbol Ps to the plastering end position indicated by symbol Pe in FIG.

[0054] As shown in FIG. 6, the leveling plate 320 includes a first plate 321 attached to a support rod 330 and a second plate 322 connected obliquely to the first plate 321. A blade 333 for leveling mortar may be formed at the tip of the second plate 322. After automatically spraying mortar onto the inner surface TF of an existing tunnel using the automatic spraying device 110, the leveling machine main body 300 is moved along the second guide rails 410A and 410B while the blade 333 of the vibrating leveling plate 320 abuts against the mortar sprayed onto the inner surface TF. This allows the mortar to be automatically leveled in the hatched area to be plastered on the inner surface TF shown in FIG. 6. The symbol Wb in FIG. 7 denotes the blade width (dimension along the longitudinal axis X1) of the leveling plate 320. The automatic spraying / plastering construction cart 100 (automatic plastering device 200) corresponds to a "mortar leveling width" that can level a section corresponding to the blade width Wb along the circumferential direction of the tunnel in one automatic plastering operation. In this embodiment, the blade width Wb of the leveling plate 320 may be set to a dimension equivalent to the nozzle stroke width Wn (mortar spraying width) of the automatic spraying device 110, for example. This allows the mortar spraying width by the automatic spraying device 110 and the mortar leveling width by the automatic plastering device 200 to roughly match, enabling efficient automatic construction. In addition, the blade width Wb of the leveling plate 320 and the nozzle stroke width Wn (mortar spraying width) may be set to the same dimension. This allows the mortar spray width by the automatic spraying device 110 to match the mortar leveling width by the automatic plastering device 200, making automatic construction even more efficient. Of course, the blade width Wb of the leveling plate 320 may be different from the nozzle stroke width Wn (mortar spray width).

[0055] Furthermore, from the viewpoint of more smoothly leveling the surface of the mortar sprayed onto the inner peripheral surface TF, it is preferable to perform automatic plastering of the mortar while raising the leveling machine main body 300 along the second guide rails 410A, 410B, but this is not limited to this. That is, it is also possible to perform automatic plastering of the mortar sprayed onto the inner peripheral surface TF while lowering the leveling machine main body 300 along the second guide rails 410A, 410B. Of course, when plastering of the mortar while lowering the leveling machine main body 300 in this manner, the leveling plate 320 may have specifications different from those shown in FIG. 6. For example, when plastering is performed while lowering the leveling machine main body 300 along the second guide rails 410A, 410B, the leveling plate 320 may be attached to the support rod 330 in a position similar to the modified example shown in FIG. 8. The leveling plate 320 and other components of the leveling machine main body 300 can be changed as appropriate depending on the direction in which the leveling machine main body 300 moves along the second guide rails 410A, 410B when automatic plastering is performed, and other conditions. The automatic spraying / plastering cart 100 has a controller for controlling the operation of the automatic plastering device 200. The controller may be a control panel provided in the automatic spraying / plastering cart 100.

[0056] Next, other configurations of the automatic spraying / plastering construction vehicle 100 will be described. In one embodiment, the automatic spraying / plastering construction vehicle 100 has running wheels 134 connected to the spraying / plastering device base 130 via axles PX having rotational axes parallel to the left-right axis Y1. For example, the front wheels 134A are connected to the support frame FR1 of the front portal frame 132A via axles PX. The rear wheels 134B are connected to the support frame FR1 of the rear portal frame 132C via axles PX. A height-adjusting telescopic cylinder 138 (shown in FIG. 2) is provided between each running wheel 134 and the support frame FR1. The height-adjusting telescopic cylinder 138 may be, for example, an electric cylinder. The height of the automatic spraying / plastering construction vehicle 100 can be adjusted by changing the extension state of the height-adjusting telescopic cylinder 138. Of course, the height-adjusting telescopic cylinders 138 attached to each running wheel 134 may be operated individually, or multiple height-adjusting telescopic cylinders 138 may be operated simultaneously.

[0057] Furthermore, the automatic spraying / plastering construction vehicle 100 according to this embodiment is equipped with guide wheels 139, for example, near the four corners of the spraying / plastering device base 130 (see FIG. 2). The guide wheels 139 are provided at the middle of each support frame FR1 in the front portal frame 132A and at the middle of each support frame FR1 in the rear portal frame 132C. The guide wheels 139 are pressed against the inner circumferential surface TF of the existing tunnel, thereby guiding the movement of the automatic spraying / plastering construction vehicle 100 along the alignment of the existing tunnel. Each guide wheel 139 is provided so as to protrude from the spraying / plastering device base 130 toward the inner circumferential surface TF. The amount of lateral protrusion of each guide wheel 139 can be adjusted by operating a handle 139A attached to each guide wheel 139.

[0058] The automatic spraying / plastering construction cart 100 (spraying / plastering device stand 130) is also provided with a cart stopper 170. The cart stopper 170 is a stopper member for preventing the automatic spraying / plastering construction cart 100 from shifting position on the tunnel floor surface IV. The cart stopper 170 is installed, for example, on the front side (for example, near the front portal frame 132A) and the rear side (for example, near the rear portal frame 132C) of each of the lower vertical beam frames 131A, 131B. The cart stopper 170 has, for example, a grounding plate 171 on the lower end side and a handle 172 on the upper end side. By operating the handle 172, the grounding plate can be moved. The height of the rate 171 can be varied.

[0059] When the automatic spraying / plastering construction cart 100 is traveling, the handle 172 is operated to move the grounding plate 171 upward away from the tunnel floor surface IV so that the cart stopper 170 does not function. On the other hand, when the traveling of the automatic spraying / plastering construction cart 100 is stopped and renewal / repair work (automatic spraying work, automatic plastering work) of an existing tunnel is to be performed, the grounding plate 171 is grounded to the tunnel floor surface IV in advance. This makes it possible to stabilize the posture of the automatic spraying / plastering construction cart 100 even when the automatic spraying device 110 and the automatic plastering device 200 are operating.

[0060] FIG. 9 is a diagram illustrating a modified example of the automatic spraying / plastering construction cart 100. The automatic spraying / plastering construction cart 100 (spraying / plastering device stand 130) shown in FIG. 9 has direction correcting casters 180 provided on the front side of the lower vertical beam frames 131A, 131B (for example, near the front portal frame 132A). FIG. 8 depicts the direction correcting caster 180 provided on the left lower vertical beam frame 131A of the spraying / plastering device stand 130, but a similar direction correcting caster 180 is also provided on the right lower vertical beam frame 131B. The direction correcting caster 180 is provided to be rotatable about the vertical axis Z1, and its direction can be freely changed.

[0061] The direction correcting casters 180 are wheels used to correct the traveling direction of the automatic spraying / plastering construction vehicle 100. The direction correcting casters 180 are normally positioned above the tunnel floor surface IV so as not to touch the tunnel floor surface IV (see FIG. 9). When correcting the traveling direction of the automatic spraying / plastering construction vehicle 100, the left and right direction correcting casters 180 are not in contact with the ground, and the directions of these direction correcting casters 180 are aligned in the desired direction (the direction in which the direction of the automatic spraying / plastering construction vehicle 100 is to be corrected), and then the height adjusting telescopic cylinders 138 attached to the left and right front wheels 134A are retracted. This causes the left and right direction correcting casters 180 to touch the ground and the left and right front wheels 134A to be lifted (moved up) above the tunnel floor surface IV. From this state, the automatic spraying / plastering construction vehicle 100 can be moved forward to correct the traveling direction of the automatic spraying / plastering construction vehicle 100. When the correction of the traveling direction of the automatic spraying / plastering construction vehicle 100 is complete, the height-adjusting telescopic cylinders 138 attached to the left and right front wheels 134A are extended to bring the left and right front wheels 134A into contact with the ground, and the left and right direction-correcting casters 180 are returned to a state where they are lifted off the tunnel floor surface IV.

[0062] Next, the mortar supply cart 500 in the automatic spraying / plastering cart system 1 will be described with reference to Fig. 1. The mortar supply cart 500 is a cart for supplying mortar to the automatic spraying device 110 of the automatic spraying / plastering cart 100.

[0063] The mortar supply cart 500 is configured as a self-propelled cart, similar to the spraying / plastering apparatus stand 130. The mortar supply cart 500 is equipped with a gantry-type mortar supply cart stand 510, and running wheels 520 are provided at the four corners of the mortar supply cart stand 510. As shown in FIG. 1 , in the mortar supply cart 500, the term "front-rear axis X1" refers to an axis that runs longitudinally through the mortar supply cart stand 510, the term "left-right axis Y1" refers to an axis that runs transversely through the mortar supply cart stand 510, and the term "up-down axis Z1" refers to an axis that is perpendicular to the front-rear axis X1 and the left-right axis Y1.

[0064] The mortar supply cart stand 510 includes a front portal frame 531 disposed at the front end side of the front-rear axis X1, a rear portal frame 532 disposed at the rear end side, an upper vertical beam frame 533 and a lower vertical beam frame 534 connecting the front portal frame 531 and the rear portal frame 532. The upper vertical beam frame 533 and the lower vertical beam frame 534 are disposed at the front-rear axis X1. It extends parallel to 1.

[0065] An electric chain hoist 535 is provided at the front position of the front-rear axis X1 of the upper vertical beam frame 533. A pump container 540 having a pump MP for pressure-feeding mortar to the automatic spraying device 110 of the automatic spraying / plastering construction cart 100 is suspended from the electric chain hoist 535, and the pump container 540 can be raised and lowered by the electric chain hoist 535.

[0066] A discharge port for discharging mortar is formed on the front surface of the pump container 540, and a discharge pipe 541 is connected to this discharge port. One end of a pressure-feed hose MC is connected to the discharge pipe 541 of the pump container 540, for supplying mortar pressure-fed from the pump container 540 to the spray nozzle 161 of the automatic spraying device 11. The other end of the pressure-feed hose MC is connected to the spray nozzle 161, and the mortar pressure-fed from the pump container 540 can be discharged from the spray nozzle 161 to spray the mortar. A mortar inlet for feeding mortar into the pump container 540 is opened on the top surface of the pump container 540.

[0067] A mobile electric chain hoist 536 is provided behind the electric chain hoist 535 on the upper vertical beam frame 533 of the mortar supply cart platform 510. The mobile electric chain hoist 536 is movable back and forth along the upper vertical beam frame 533 (front-rear axis X1). A mixer container 550 having a mixer MM for mixing mortar is suspended from the mobile electric chain hoist 536. A discharge port for discharging mortar mixed by the mixer MM and a discharge lid 551 for opening and closing this discharge port are provided at the bottom of the mixer container 550. The mixer container 550 suspended from the mobile electric chain hoist 536 is movable up and down and back and forth. A raw material inlet for charging mortar raw materials into the mixer container 550 is opened on the top surface of the mixer container 550.

[0068] When the mixed mortar is supplied from the mixer container 550 to the pump container 540, the pump container 540 is first moved from the normal position P1 shown in FIG. 1 to the mortar receiving position. 1 to the mortar receiving position P2. Then, the mixer container 550 is moved forward and downward from the normal position P3 shown in FIG. 1 to the mortar charging position P4 so that the mixer container 550 is positioned above the pump container 540 that has been moved to the mortar receiving position P2. In this state, the discharge port of the mixer container 550 is aligned with the mortar charging port of the pump container 540, and mortar is charged from the mixer container 550 to the pump container 540 by opening the discharge lid 551 of the mixer container 550. The mortar supply cart 500 has a controller for controlling the operations of the pump MP, mixer MM, chain blocks 535, 536, etc. The controller may be a control panel provided in the mortar supply cart 500.

[0069] 1, the automatic spraying / plastering construction cart 100 and the mortar supply cart 500 can be connected via a connector CH such as a chain, wire, or rope. This prevents the distance between the mortar supply cart 500 and the automatic spraying / plastering construction cart 100 from becoming too large beyond the length of the connector CH when they are traveling. This prevents a large load from being placed on the pressure feed hose MC.

[0070] 1, the automatic spraying / plastering construction cart 100 and the mortar supply cart 500 are provided with buffer rods 190, 560 to prevent collisions between the spraying / plastering device stand 130 and the mortar supply cart stand 410. The buffer rod 560 is provided on the front end (front gate-shaped frame 531) side of the mortar supply cart 500. A buffer rod 560 extends forward from the automatic spraying / plastering construction vehicle 100, and a shock absorber (buffer) 561 is provided at the tip of the buffer rod 560. Furthermore, a buffer rod 190 extends rearward from the rear end of the automatic spraying / plastering construction vehicle 100. For example, the buffer rod 190 extends rearward from the center in the width direction of the upper cross beam frame FR2 of the rear portal frame 132C. A shock absorber (buffer) 191 is provided at the tip of the buffer rod 190. This makes it possible to prevent the spraying / plastering device stand 130 and the mortar supply vehicle stand 510 from colliding with each other. Furthermore, the buffer rod 190 of the automatic spraying / plastering construction vehicle 100 and the buffer rod 560 on the mortar supply vehicle 500 side may be configured to be connectable.

[0071] Additionally, the mortar supply cart 500 is equipped with guide wheels 570. The guide wheels 570 may have the same structure as the guide wheels 139 in the automatic spraying / plastering cart 100. The guide wheels 570 are provided, for example, near the four corners of the mortar supply cart 500 (mortar supply cart stand 510), and the amount of lateral protrusion of each guide wheel 570 can be adjusted by operating a handle attached to each guide wheel 570. The guide wheels 570 of the mortar supply cart 500 are pressed against the inner circumferential surface TF of the existing tunnel, thereby guiding the travel of the mortar supply cart 500 along the alignment of the existing tunnel.

[0072] The following describes an exemplary procedure for a method (construction method) for updating and repairing an existing tunnel using the automatic spraying and plastering cart system 1 according to this embodiment.

[0073] First, as shown in FIG. 1, an automatic spraying / plastering cart 100 and a mortar supply cart 500 are positioned at the planned construction location of an existing tunnel to be renovated or repaired. The automatic spraying / plastering cart 100 and the mortar supply cart 500 travel along the construction direction of the existing tunnel and repeatedly perform spraying and plastering work to renovate or repair the existing tunnel. Therefore, once the automatic mortar spraying and plastering work for a certain construction section is completed, the automatic spraying / plastering cart 100 and the mortar supply cart 500 are driven to the next section (typically the next construction section adjacent in the construction direction) and positioned there. As described above, the automatic spraying / plastering cart 100 sprays and plasters mortar at a fixed width (mortar spraying width, mortar leveling width) for each construction section. Therefore, the length of one construction section in the tunnel axial direction corresponds to the mortar spraying width (mortar leveling width).

[0074] Once the automatic spraying / plastering cart 100 and the mortar supply cart 500 have been placed (set) at the work site, the automatic spraying / plastering cart 100 is used to perform automatic spraying and plastering of mortar on the inner peripheral surface TF, while pumping mortar from the pump container 440 in the mortar supply cart 500 to the automatic spraying device 110. Figure 9 is a diagram that schematically illustrates the state of automatic spraying and plastering work.

[0075] As described above, the automatic spraying / plastering cart 100 has the automatic spraying device 110 disposed at the front of the cart in the direction of construction progress, and the automatic plastering device 200 disposed adjacent to the rear of the automatic spraying device 110, allowing automatic spraying and plastering work to be performed in parallel, side by side in the direction of construction progress. CA1 shown in FIG. 10 is the "target work area" to be newly sprayed by the automatic spraying device 110 on the automatic spraying / plastering cart 100. CA2 is the "most recently sprayed work area" corresponding to the work area immediately preceding the target work area CA1. The automatic plastering device 200 performs automatic plastering on this "most recently sprayed work area CA2" as the target plastering work area. Furthermore, the operation of the automatic spraying device 110 and the automatic plastering device 200 can be automatically controlled by operating a controller (control panel) provided on the automatic spraying / plastering cart 100. 10, a gap is formed between the work area CA1 to be sprayed and the work area CA2 that has just been sprayed, but this is not limiting. For example, by appropriately changing the specifications of the spraying machine body 140, the nozzle stroke width W The width n (mortar spraying width) may be greater than the dimension between the first guide rails 150A, 150B. Similarly, the blade width Wb of the leveling board 320 may be greater than the dimension between the second guide rails 410A, 410B. By adopting such specifications, automatic spraying and automatic plastering can be carried out in parallel without forming a gap between the work area CA1 to be sprayed and the most recently sprayed work area CA2, as shown in FIG. 11 .

[0076] When the automatic spraying of mortar to the spraying target work section CA1 and the automatic plastering of mortar to the most recently sprayed work section CA2 (the section to be plastered) are completed, the automatic spraying device 110 and automatic plastering device 200 of the automatic spraying / plastering cart 100, as well as the pump MP of the mortar supply cart 500, are stopped, and the automatic spraying / plastering cart 100 and the mortar supply cart 500 are advanced toward the next work section. In this way, the automatic spraying / plastering cart system 1 can perform automatic spraying of mortar and automatic plastering of the inner surface TF along the extension direction of the existing tunnel while sequentially changing the work section to be worked on. This allows automatic and efficient spraying and plastering of the inner surface of the existing tunnel without relying on human labor.

[0077] 4 and 6, the automatic spraying / plastering construction vehicle 100 in this embodiment is configured so that the first guide rails 150A, 150B of the automatic spraying device 110 and the second guide rails 410A, 410B of the automatic plastering device 200 extend to positions corresponding to the right half of the inner circumferential surface TF of an existing tunnel. Of course, this configuration is merely one embodiment of the present invention, but this configuration (hereinafter referred to as the "tunnel right-half construction specification") targets the right half of the inner circumferential surface TF. Therefore, the automatic spraying / plastering construction vehicle system 1 may include a set of an automatic spraying / plastering construction vehicle 100 configured to target the left half of the inner circumferential surface TF of an existing tunnel (hereinafter referred to as the "tunnel left-half construction specification"), and a mortar supply vehicle 500 that supplies mortar to the automatic spraying / plastering construction vehicle 100.

[0078] Figure 12 is a diagram showing one embodiment of an automatic spraying / plastering construction cart system. Reference numeral 100R shown in Figure 12 is an automatic spraying / plastering construction cart with tunnel right-half construction specifications, and reference numeral 500R is a mortar supply cart that supplies mortar to the automatic spraying / plastering construction cart 100R. Reference numeral 100L is an automatic spraying / plastering construction cart with tunnel left-half construction specifications, and reference numeral 500L is a mortar supply cart that supplies mortar to the automatic spraying / plastering construction cart 100L.

[0079] 12 is also an example, and for example, the first guide rails 150A, 150B of the automatic spraying device 110 in the automatic spraying / plastering cart 100 and the second guide rails 410A, 410B of the automatic plastering device 200 may be extended to cover the entire circumferential section of the inner surface TF of the existing tunnel. According to this embodiment, both the right and left halves of the existing tunnel can be constructed at the same time in a single construction run by the automatic spraying / plastering cart 100.

[0080] Although the embodiments of the present invention have been described above, 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]

[0081] 1. Automatic spraying and plastering construction cart system 100···Automatic spraying and plastering construction cart 110 Automatic spraying device 130···Spraying and plastering equipment stand 140···Spray machine body 150A, 150B...First guide rail 200 Automatic plastering device 300···Smoothing machine body 400 Plastering equipment stand 410A, 410B... Second guide rail 500···Mortar supply cart

Claims

1. This is an automatic spraying and plastering construction cart that is applied to the renewal and repair work of existing tunnels, a self-propelled spraying / plastering device stand having running wheels that can run inside the existing tunnel along its extension direction; an automatic spraying device mounted on the spraying / plastering device stand and automatically spraying mortar onto the inner surface of the existing tunnel; an automatic plastering device mounted on the spraying / plastering device stand and automatically leveling the mortar sprayed onto the inner peripheral surface by the automatic spraying device; Equipped with Automatic spraying and plastering construction cart.

2. The automatic plastering device is installed downstream of the automatic spraying device on the front-rear axis of the spraying / plastering device stand. The automatic spraying / plastering cart according to claim 1.

3. The automatic spraying device and the automatic plastering device are arranged adjacent to each other in the front-to-rear axial direction of the spraying / plastering device stand. The automatic spraying / plastering cart according to claim 2.

4. The automatic spraying device includes a spraying machine body having a mortar spraying nozzle, and an arch-shaped first guide rail that holds the spraying machine body and defines a path along which the spraying machine body moves along the inner circumferential surface, The automatic plastering device has a leveling machine body having a mortar leveling plate, and an arch-shaped second guide rail that holds the leveling machine body and defines a path along which the leveling machine body moves along the inner peripheral surface. The automatic spraying / plastering cart according to any one of claims 1 to 3.

5. The first guide rail and the second guide rail extend along the left-right axis direction of the spraying / plastering apparatus stand. The automatic spraying / plastering cart according to claim 4.

6. The automatic spraying device is capable of spraying mortar using the spray nozzle while sliding the spray nozzle back and forth in the front-to-rear axial direction of the spraying / plastering device stand at a predetermined nozzle stroke width. The automatic spraying / plastering cart according to any one of claims 1 to 3.

7. The blade width of the leveling plate in the front-to-rear axial direction of the spraying / plastering device stand is equal to the nozzle stroke width, The automatic spraying / plastering cart according to claim 6.

8. A method for updating and repairing an existing tunnel, comprising the steps of: automatically spraying mortar and automatically plastering the inner surface of the existing tunnel using the automatic spraying / plastering cart described in claim 1.

9. The automatic spraying / plastering cart according to claim 1; a mortar supply cart that supplies mortar to the automatic spraying device mounted on the automatic spraying / plastering construction cart; Equipped with Automatic spraying and plastering construction cart system.

Images