Curing trolley outside open-cut tunnel

Abstract

The invention provides a maintenance trolley outside an open-cut tunnel, and belongs to the technical field of tunnel construction equipment. The trolley comprises a trolley body, the trolley body is provided with two arc-shaped frames which are oppositely arranged in parallel, a plurality of operation platforms with different heights are arranged between the two arc-shaped frames, a crawling ladder is arranged between any two operation platforms, and a spraying maintenance unit arranged in the extending direction of the arc-shaped frame is arranged below at least one arc-shaped frame. The spraying device is used for spraying and maintaining the outer side wall of the tunnel; a moving unit sliding along the arc-shaped frame is arranged on the inner side of the trolley body, the moving unit comprises a roller structure capable of rolling around the outer side wall of the tunnel in the circumferential direction, the roller structure is provided with a coating part used for coating waterproof paint on the outer side wall of the tunnel in a rolling mode, and the coating part can further fix waterproof coiled materials so that the moving unit can lay the waterproof coiled materials; the technical problems that an existing open-cut tunnel construction trolley is single in function and low in construction efficiency are mainly solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction equipment, and in particular relates to an external maintenance trolley for an open-cut tunnel. Background Art

[0002] Open-cut tunnels are mainly suitable for situations with good geological conditions and low groundwater levels. Open-cut tunneling is an underground engineering construction method that first digs the ground, builds the lining in the open air, and then covers and backfills. It is mostly used for shallow buried tunnels.

[0003] After the main structure of the open-cut tunnel is completed, it needs to be maintained and then waterproofed. Waterproofing construction usually requires applying waterproof paint first and then laying waterproof membrane.

[0004] At present, the above-mentioned construction methods need to be equipped with corresponding construction equipment respectively, and the construction efficiency is low. The Chinese utility model patent with document number CN220225436 U discloses a trolley for waterproof construction of open hole lining. The trolley has a main support frame adapted to the outer wall of the open hole, a walking wheel set arranged at both ends of the main support frame, and a track arranged on both sides of the open hole and consistent with the direction of the open hole; the main support frame is provided with a working platform, and the main support frame is provided with rollers, which can be used to apply waterproof coating.

[0005] Although the above equipment makes it convenient for operators to carry out various construction operations outside the Myeongdong, most operations still require manual assistance. For example, when performing maintenance, workers are required to stand on the work platform to spray water; when laying waterproof membranes, workers are required to manually lay them on the work platform; in addition, when applying waterproof coatings, manual assistance is also required to dip the coating, which requires a lot of labor and low construction efficiency.

[0006] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0007] The object of the present invention is to provide an open-cut tunnel external maintenance trolley, which is used to solve the technical problems of the existing open-cut tunnel construction trolleys having single functions and low construction efficiency.

[0008] In order to achieve the above-mentioned purpose, the open-cut tunnel external maintenance trolley of the present invention provides the following technical solutions:

[0009] An open-cut tunnel external maintenance trolley, comprising a trolley body, the trolley body having two relatively parallel arc frames, a plurality of operating platforms of different heights being arranged between the two arc frames, a ladder being arranged between any two of the operating platforms, and a spray maintenance unit arranged along the extending direction of the arc frame under at least one of the arc frames, for spraying and maintaining the outer wall of the tunnel;

[0010] A moving unit sliding along the arc frame is arranged on the inner side of the trolley body. The moving unit includes a roller structure that can roll circumferentially around the outer wall of the tunnel. The roller structure has a coating component for rolling waterproof coating on the outer wall of the tunnel. The coating component can also fix the waterproof coiled material so that the moving unit can lay the waterproof coiled material.

[0011] As a further optimized technical solution, the spray curing unit has a spray pipe extending along the inner wall of the arc frame, and a plurality of nozzles for spraying water are arranged at intervals on the spray pipe.

[0012] As a further optimized technical solution, spray curing units are respectively provided on the two arc-shaped frames.

[0013] As a further optimized technical solution, arc tracks are respectively opened on the outer side walls of the two arc frames, and the moving unit moves circumferentially around the outer side wall of the tunnel along the arc tracks.

[0014] As a further optimized technical solution, the mobile unit further includes:

[0015] A sliding block, the sliding block is clamped in the arc track and slidingly cooperates with the arc track;

[0016] A driving structure, wherein the driving structure is used to drive the sliding block to slide along the arc track;

[0017] A connecting structure, one end of which is fixedly connected to the sliding block, and the other end of which is detachably connected to the roller structure;

[0018] The connecting structure can be retracted so that the roller structure presses the outer side wall of the tunnel.

[0019] As a further optimized technical solution, the roller structure includes:

[0020] A cylinder, wherein the inner side of the cylinder has a containing cavity, and the containing cavity is used to contain the waterproof coating;

[0021] A slurry leakage structure, which is evenly distributed on the side wall of the cylinder and is used to leak the waterproof coating in the accommodating cavity;

[0022] A coating cushion layer, which is coated on the outside of the cylinder and is used to evenly apply the waterproof coating on the outer surface of the tunnel;

[0023] The slurry leakage structure and the coating cushion layer constitute the coating component.

[0024] As a further optimized technical solution, the slurry leakage structure includes:

[0025] The slurry leakage holes are evenly arranged on the side wall of the cylinder, and the slurry leakage holes are roughly funnel-shaped, and the diameter of the slurry leakage holes decreases from the inner side to the outer side of the cylinder;

[0026] An elastic reset member, wherein the elastic reset member is fixedly arranged at one end of the inner side of the slurry leakage hole;

[0027] A plugging ball, wherein the plugging ball is arranged in the slurry leakage hole, and the elastic reset member is used to compress the plugging ball to plug the slurry leakage hole;

[0028] When the blocking balls block the slurry leakage holes, part of the blocking balls extend out of the slurry leakage holes.

[0029] As a further optimized technical solution, the driving structure includes:

[0030] A rack, the rack being fixedly arranged on the bottom wall of the arc-shaped track;

[0031] A driving gear, the driving gear is rotatably arranged on the sliding block, and the driving gear is meshed with the rack for transmission;

[0032] A rotation driving source is arranged on the sliding block and is used to drive the driving gear to rotate.

[0033] As a further optimized technical solution, the arc track is provided with a guide protrusion extending along the arc track, and the sliding block is provided with a groove matched with the guide protrusion, and the groove is buckled on the guide protrusion.

[0034] As a further optimized technical solution, the connection structure includes:

[0035] A connecting sleeve, wherein the connecting sleeve is fixedly connected to the sliding block;

[0036] A connecting rod, one end of which extends into the connecting sleeve and is slidably connected to the connecting sleeve, and the other end of which is used to connect to the roller structure;

[0037] An elastic connector, one end of which presses the connecting rod tightly, and the other end of which presses the connecting sleeve tightly;

[0038] A sliding plate, wherein the sliding plate is slidably disposed in the connecting sleeve, and the elastic connecting member is pressed against the connecting sleeve via the sliding plate;

[0039] A limiting bolt partially extends into the connecting sleeve and is threadedly connected to the connecting sleeve, and one end of the limiting bolt extends into the connecting sleeve to press the sliding plate.

[0040] Beneficial effects: The external maintenance trolley for open-cut tunnels provided by the present invention replaces manual spray maintenance by installing a spray maintenance unit under the arc frame, thereby effectively improving the construction efficiency; in addition, a moving unit is installed on the trolley body, and the moving unit has a roller structure that can roll the waterproof coating around the outer wall of the tunnel. In this way, it is only necessary to fill the coating in the roller structure and then make the moving unit roll circumferentially around the outer wall of the tunnel to achieve the coating of the waterproof coating. At the same time, the coating component on the roller structure can also fix the waterproof coiled material. When the waterproof coiled material needs to be laid, the waterproof coiled material can be fixed on the roller structure. The laying of the waterproof coiled material can be achieved during the circumferential movement of the roller structure around the outer wall of the tunnel. By using the technical solution of the present invention, the labor intensity of the workers is effectively reduced, and it is rich in functions and improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0042] Figure 1 This is a schematic diagram of the overall structure of an open-cut tunnel external maintenance trolley according to an embodiment of the present invention;

[0043] Figure 2 It is a schematic cross-sectional view of a partial structure of an open-cut tunnel external maintenance trolley according to an embodiment of the present invention;

[0044] Figure 3 for Figure 2 A schematic diagram of the structure enlargement of part A;

[0045] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part B.

[0046] In the figure: 100, trolley body; 110, arc frame; 111, arc track; 112, protrusion; 120, operating platform; 130, ladder; 200, spray maintenance unit; 210, spray pipe; 220, nozzle; 300, moving unit; 310, sliding block; 320, cylinder; 321, accommodating cavity; 330, coating cushion; 340, slurry leakage hole; 350, elastic reset part; 360, blocking ball; 370, rack; 380, driving gear; 390, rotating drive source; 311, connecting sleeve; 312, connecting rod; 313, sliding plate; 314, limiting bolt; 315, elastic connector; 316, axial connector. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0048] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0049] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0050] The present invention provides an external maintenance trolley for an open-cut tunnel. By arranging a spray maintenance unit and a moving unit on the trolley body, tunnel maintenance, waterproof coating coating and waterproof membrane laying are conveniently and efficiently performed, thereby effectively improving construction efficiency.

[0051] Example 1

[0052] like Figure 1 , Figure 2 As shown, the open-cut tunnel external maintenance trolley includes a trolley body 100, which can be set on the outside of the open-cut tunnel to facilitate the corresponding construction of the outer wall of the tunnel. The trolley body 100 has two relatively parallel arc frames 110, and multiple operating platforms 120 with different heights are arranged between the two arc frames 110. A ladder 130 is arranged between any two operating platforms 120, which is convenient for operators to reach any operating platform 120 through the ladder 130 to perform corresponding construction operations. In order to ensure the safety of the construction platform, a guardrail (not shown in the figure) can be fixedly installed on the edge of the construction platform, thereby improving safety performance.

[0053] Among them, there is a spray maintenance unit 200 arranged along the extension direction of the arc frame 110 under at least one arc frame 110, which is used to spray and maintain the outer wall of the tunnel. In this embodiment, the two arc frames 110 are respectively provided with spray maintenance units 200, so as to improve the efficiency of spray maintenance. Specifically, the spray maintenance unit 200 has a spray pipe 210 extending along the inner wall of the arc frame 110, and the end of the spray pipe 210 is connected to an external water supply device to ensure the water supply to the spray pipe 210. A plurality of nozzles 220 for spraying water are arranged at intervals on the spray pipe 210, so that the entire curvature range of the tunnel can be sprayed at the same time. During the spraying process, the vehicle body 100 can be controlled to move along the axial direction of the tunnel, thereby expanding the spraying range.

[0054] like Figure 1 , Figure 3 , Figure 4 As shown, a moving unit 300 sliding along the arc frame 110 is arranged on the inner side of the trolley body 100, and the moving unit 300 includes a roller structure that can roll circumferentially around the outer wall of the tunnel, and the roller structure has a coating component for rolling waterproof coating on the outer wall of the tunnel, and the coating component can also fix the waterproof roll material so that the moving unit 300 can lay the waterproof roll material.

[0055] Specifically, arc tracks 111 extending along the arc tracks 110 are respectively opened on the outer side walls of the two arc frames 110 , and the moving unit 300 moves circumferentially around the outer side wall of the tunnel along the arc tracks 111 .

[0056] In this embodiment, the moving unit 300 further includes a sliding block 310 , a driving structure, and a connecting structure.

[0057] Specific as Figure 3 As shown, the arc track 111 is a concave structure, and the cross-sectional shape of the sliding block 310 is the same as the shape of the upper half of the arc track 111, so that the sliding block 310 is conveniently clamped in the arc track 111 and slides with the arc track 111. The driving structure is installed on the sliding block 310 to drive the sliding block 310 to slide along the arc track 111. The driving structure includes a rack 370, a driving gear 380 and a rotation driving source 390. The overall shape of the rack 370 is adapted to the shape of the arc track 111, and is fixedly installed on the bottom wall of the arc track 111. The driving gear 380 is rotatably installed on the sliding block 310, and the driving gear 380 is meshed with the rack 370 for transmission. In this way, the rotation of the driving gear 380 will drive the sliding block 310 to slide along the arc track 111. In order to realize the driving gear 380 rotation, a servo motor is selected as the rotation driving source 390 installed on the sliding block 310, and the servo motor is used to drive the driving gear 380 to rotate. At the same time, the servo motor rotates forward and reversely to drive the sliding block 310 to reciprocate along the arc track 111.

[0058] One end of the connection structure is fixedly connected to the sliding block 310, and the other end is detachably connected to the roller structure. The connection structure is used to connect the roller structure so that the roller structure moves along the arc track 111 with the sliding block 310, thereby achieving circumferential rolling around the outer wall of the tunnel.

[0059] Furthermore, in order to ensure that the sliding block 310 can slide smoothly along the arc track 111, a guide protrusion 112 is provided on the arc track 111 and extends along the arc track 111. The cross-section of the protrusion 112 can be semicircular, square, triangular or other shapes, and a groove matching the guide protrusion 112 is provided on the corresponding sliding block 310, and the groove is snapped on the guide protrusion 112.

[0060] Furthermore, the connection structure can be retracted so that the roller structure presses the outer side wall of the tunnel.

[0061] The connection structure specifically includes a connection sleeve 311 , a connection rod 312 , an elastic connection member 315 , a sliding plate 313 and a limiting bolt 314 .

[0062] The top of the connecting sleeve 311 is fixedly connected to the sliding block 310, one end of the connecting rod 312 extends from the bottom into the connecting sleeve 311 and is slidably connected to the connecting sleeve 311, and the other end is used to connect the roller structure. The spiral spring as an elastic connecting member 315 presses the connecting rod 312 at one end and presses the connecting sleeve 311 at the other end. In this way, it can be ensured that the roller structure is always in a state of pressing the outer wall of the tunnel during the process of rolling along the circumference of the tunnel.

[0063] The sliding plate 313 is slidably arranged in the connecting sleeve 311, and the elastic connecting member 315 presses the connecting sleeve 311 through the sliding plate 313. The limiting bolt 314 partially extends into the connecting sleeve 311 and is threadedly connected to the connecting sleeve 311. The limiting bolt 314 extends into one end of the connecting sleeve 311 to press the sliding plate 313. The purpose of setting the sliding plate 313 and the limiting bolt 314 is to adjust the extension degree of the elastic connecting member 315, so as to adjust the degree to which the roller structure presses the tunnel.

[0064] like Figure 3 , Figure 4 As shown, the roller structure includes a cylinder body 320 , a slurry leakage structure and a coating cushion layer 330 .

[0065] The inner side of the cylinder 320 has a accommodating cavity 321, and the accommodating cavity 321 is used to hold the waterproof coating. The cylinder 320 is installed on the connecting rod 312 through the axial connector 316, and the cylinder 320 and the axial connector 316 are rotatably matched, and the axial connector 316 is detachably connected to the connecting rod 312 through a screw. In this way, when the sliding block 310 moves along the arc track 111, the cylinder 320 can realize axial rotation around itself. The slurry leakage structure is evenly distributed on the side wall of the cylinder 320, and is used to leak the waterproof coating in the accommodating cavity 321. The coating cushion layer 330 is coated on the outside of the cylinder 320, and the coating cushion layer 330 is a soft elastic water-absorbing fabric, which is convenient for evenly brushing the waterproof coating on the outer surface of the tunnel. That is, the slurry leakage structure leaks the waterproof coating from the cylinder 320, and the leaked waterproof coating fully soaks the coating cushion layer 330, thereby ensuring that the waterproof coating is evenly coated on the tunnel. The slurry leakage structure and the coating cushion layer 330 constitute the above-mentioned coating component.

[0066] In this embodiment, the slurry leakage structure specifically includes a slurry leakage hole 340 , an elastic reset member 350 and a blocking ball 360 .

[0067] The leakage holes 340 are evenly arranged on the side wall of the cylinder 320, and the leakage holes 340 are roughly in the shape of a funnel. It should be noted here that the shape of the leakage holes 340 can be a funnel shape, a conical shape, or a shape close to a funnel, as long as it can achieve convenient leakage of the paint, and the diameter of the leakage holes 340 decreases from the inside to the outside of the cylinder 320. The elastic reset member 350 is a compression sheet with elasticity, and both ends are fixedly installed at one end of the inner side of the leakage hole 340. The sealing ball 360 is installed in the leakage hole 340. Under normal circumstances, the elastic reset member 350 is used to compress the sealing ball 360 to seal the leakage hole 340, thereby preventing the waterproof coating in the cylinder 320 from leaking out. Specifically, during the construction process, the leakage structure facing the tunnel is squeezed by the tunnel, so that the sealing ball 360 shrinks toward the inside of the cylinder 320 and squeezes the elastic reset member 350 to deform (it should be noted here that the stiffness coefficient of the elastic reset member 350 is much smaller than the stiffness coefficient of the elastic connector 315 in the connecting structure, so that the expansion and contraction of the connecting structure will not affect the normal slurry discharge of the leakage structure), so that the waterproof coating in the cylinder 320 leaks out through the leakage hole 340. When the leakage structure at this position rotates to deviate from the tunnel, the elastic reset member 350 squeezes the sealing ball 360 to seal the leakage hole 340, thereby preventing the slurry from leaking out.

[0068] Furthermore, when the blocking ball 360 blocks the leakage hole 340, part of the blocking ball 360 extends out of the leakage hole 340. The outer diameter of the cylinder 320 is matched with the inner diameter of the support tube inside the waterproof coiled material. When the blocking ball 360 partially leaks out of the leakage hole 340, the radial dimension of the outer contour of the cylinder 320 as a whole is larger than the inner diameter of the support tube inside the waterproof coiled material. In this way, when it is necessary to lay the waterproof coiled material, the support tube of the waterproof coiled material is sleeved on the cylinder 320. At this time, the blocking ball 360 squeezes the support tube of the waterproof coiled material, so that the waterproof coiled material can be fixed on the outside of the cylinder 320, and then the sliding block 310 drives the cylinder 320 to move around the tunnel circumference, thereby realizing the convenient laying of the waterproof coiled material. That is, the coating component can also fix the waterproof coiled material so that the mobile unit 300 can lay the waterproof coiled material.

[0069] Furthermore, in order to facilitate the installation of the waterproof membrane, conical guide installation surfaces are respectively provided at both ends of the cylinder 320.

[0070] Specifically, when it is necessary to maintain the tunnel, the spray maintenance unit is turned on to work, and the trolley body 100 is moved axially at the same time, so that the tunnel can be quickly maintained; when it is necessary to spray waterproof coating, the waterproof coating solution is filled into the cylinder 320 of the moving unit, and then the sliding block 310 is moved along the arc frame 110, so that the cylinder 320 rolls around the outer wall of the tunnel, thereby realizing the coating of the waterproof coating; when it is necessary to lay waterproof membrane, the waterproof membrane is fixed on the outside of the cylinder 320, and then the sliding block 310 is moved along the arc frame 110, so that the cylinder 320 rolls around the outer wall of the tunnel, thereby facilitating the laying of the waterproof membrane.

[0071] It should be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. An open-cut tunnel maintenance trolley, comprising a trolley body (100), wherein the trolley body (100) has two relatively parallel arc frames (110), a plurality of operating platforms (120) of different heights are arranged between the two arc frames (110), and a ladder (130) is arranged between any two of the operating platforms (120), characterized in that: A spray maintenance unit (200) is provided below at least one of the arc-shaped frames (110) and is arranged along the extending direction of the arc-shaped frame (110), and is used for spray maintenance of the outer side wall of the tunnel; A moving unit (300) is arranged inside the trolley body (100) and slides along the arc frame (110). The moving unit (300) comprises a roller structure that can roll around the outer wall of the tunnel. The roller structure has a coating component for rolling waterproof coating on the outer wall of the tunnel. The coating component can also fix waterproof coiled material so that the moving unit (300) can lay the waterproof coiled material.

2. The open-cut tunnel external maintenance trolley according to claim 1, characterized in that: The spray curing unit (200) comprises a spray pipe (210) extending along the inner wall of the arc-shaped frame (110), and a plurality of spray heads (220) for spraying water are arranged at intervals on the spray pipe (210).

3. The open-cut tunnel external maintenance trolley according to claim 2, characterized in that: A spray curing unit (200) is respectively arranged on the two arc-shaped frames (110).

4. The open-cut tunnel external maintenance trolley according to claim 1, characterized in that: The outer side walls of the two arc-shaped frames (110) are respectively provided with arc-shaped tracks (111), and the moving unit (300) moves circumferentially around the outer side wall of the tunnel along the arc-shaped tracks (111).

5. The open-cut tunnel external maintenance trolley according to claim 4, characterized in that: The mobile unit (300) further comprises: A sliding block (310), the sliding block (310) being clamped in the arc track (111) and slidingly matched with the arc track (111); A driving structure, the driving structure being used to drive the sliding block (310) to slide along the arc track (111); A connecting structure, one end of which is fixedly connected to the sliding block (310), and the other end of which is detachably connected to the roller structure; The connecting structure can be retracted so that the roller structure presses the outer side wall of the tunnel.

6. The open-cut tunnel external maintenance trolley according to claim 5, characterized in that: The roller structure comprises: A cylinder (320), wherein the cylinder (320) has a receiving cavity (321) inside, and the receiving cavity (321) is used to contain the waterproof coating; A slurry leakage structure, the slurry leakage structure is evenly distributed on the side wall of the cylinder (320) and is used to leak the waterproof coating in the accommodating cavity (321); A coating cushion layer (330), the coating cushion layer (330) is coated on the outside of the cylinder (320) and is used to evenly apply the waterproof coating on the outer surface of the tunnel; The slurry leakage structure and the coating cushion layer (330) constitute the coating component.

7. The open-cut tunnel external maintenance trolley according to claim 6, characterized in that: The slurry leakage structure comprises: The slurry leakage holes (340) are evenly arranged on the side wall of the cylinder (320), and the slurry leakage holes (340) are substantially in the shape of a funnel, and the diameter of the slurry leakage holes (340) decreases from the inside to the outside of the cylinder (320); An elastic reset member (350), wherein the elastic reset member (350) is fixedly arranged at one end inside the slurry leakage hole (340); A blocking ball (360), wherein the blocking ball (360) is arranged in the slurry leakage hole (340), and the elastic reset member (350) is used to compress the blocking ball (360) to block the slurry leakage hole (340); When the blocking ball (360) blocks the slurry leakage hole (340), part of the blocking ball (360) extends out of the slurry leakage hole (340).

8. The open-cut tunnel external maintenance trolley according to claim 5, characterized in that: The driving structure comprises: A rack (370), wherein the rack (370) is fixedly arranged on the bottom wall of the arc track (111); A driving gear (380), the driving gear (380) is rotatably disposed on the sliding block (310), and the driving gear (380) is meshed with the rack (370) for transmission; A rotation driving source (390) is provided on the sliding block (310) and is used to drive the driving gear (380) to rotate.

9. The open-cut tunnel external maintenance trolley according to claim 5, characterized in that: The arc track (111) is provided with a guide protrusion (112) extending along the arc track (111), and the sliding block (310) is provided with a groove matching the guide protrusion (112), and the groove is buckled on the guide protrusion (112).

10. The open-cut tunnel external maintenance trolley according to any one of claims 5 to 9, characterized in that: The connection structure comprises: A connecting sleeve (311), wherein the connecting sleeve (311) is fixedly connected to the sliding block (310); A connecting rod (312), one end of which extends into the connecting sleeve (311) and is slidably connected to the connecting sleeve (311), and the other end of which is used to connect to the roller structure; An elastic connecting piece (315), one end of the elastic connecting piece (315) is pressed tightly against the connecting rod (312), and the other end of the elastic connecting piece (315) is pressed tightly against the connecting sleeve (311); A sliding plate (313), wherein the sliding plate (313) is slidably disposed in the connecting sleeve (311), and the elastic connecting member (315) is pressed against the connecting sleeve (311) via the sliding plate (313); A limiting bolt (314), wherein a portion of the limiting bolt (314) extends into the connecting sleeve (311) and is threadedly connected to the connecting sleeve (311), and one end of the limiting bolt (314) extending into the connecting sleeve (311) presses the sliding plate (313).

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