Mobile platform for construction operation of outer wall of tunnel vault trolley

Abstract

The utility model discloses a mobile platform for construction operation of the outer wall of a tunnel vault trolley. The mobile platform comprises an arc-shaped main beam, a sliding assembly, a protective fence, an operation platform and a traction device. The arc-shaped main beam comprises two arc-shaped steel frameworks matched with the outer wall of the tunnel vault trolley in shape and a plurality of transverse connecting rods welded between the two arc-shaped steel frameworks and arranged in parallel, and all the arc-shaped steel frameworks and the transverse connecting rods are fixed to form a rigid frame structure. The sliding assembly is installed at the bottom of the arc-shaped main beam. The protective guard is perpendicular to the plane where the rigid frame structure is located, the lower end of the protective guard is welded to the arc-shaped steel framework, and the protective guard is arranged in the length direction of the arc-shaped main beam. The working platform is arranged on the transverse connecting rod; the two ends of the arc-shaped main beam are respectively provided with a horizontal guide plate, and the traction device is connected with the arc-shaped main beam through the horizontal guide plates. The tunnel vault trolley outer wall polishing efficiency is greatly improved, and the tunnel vault trolley outer wall polishing device has high practical value.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel construction and maintenance equipment, and in particular to a mobile platform for tunnel arch trolley outer wall construction operations. Background Technology

[0002] After the main structure arch of the open-cut section of the airport tunnel is constructed using a trolley, its surface often contains concrete residue and traces of formwork joints, requiring grinding and cleaning to meet the requirements of subsequent waterproofing or decoration. Currently, the traditional method involves erecting temporary working platforms using scaffolding for manual grinding at height. However, this scaffolding method is only suitable for fixed-point grinding. When the grinding location needs to be changed, the scaffolding must be moved manually, one point at a time, which is time-consuming and labor-intensive. Moreover, since the scaffolding is set up on the ground, it may affect the standardized management of the construction site and interfere with other construction processes.

[0003] A search revealed the invention patent CN115351663B (authorization announcement date: August 25, 2023), entitled "Grinding Device for Tunnel Lining Trolley Formwork." This solution provides a grinding device integrated onto the tunnel lining trolley formwork. It uses a dust extraction hood that moves along the outer arched surface of the formwork and works in conjunction with grinding components to complete the automatic grinding operation, while simultaneously using a fan to collect dust. Although this device achieves automated grinding and dust removal of the formwork's outer surface, it is primarily suitable for cleaning and maintaining the trolley formwork itself and cannot be used for on-site grinding of the concrete surface in the arch area.

[0004] Furthermore, the invention patent CN110242329B (authorization announcement date: February 9, 2024), entitled "An Automatic Grinding and Spraying Device and Method for Tunnel Secondary Lining Concrete Trolley Template," describes a solution that uses components such as walking wheels, a rotary drive system, and a grinding belt to automatically grind the template surface and spray a release agent. While it boasts a high degree of automation, it is similarly limited to cleaning the template body, lacks a grinding adaptation structure suitable for the surface of arch concrete structures, and does not possess the ability to combine flexible on-site movement with a manual operation platform.

[0005] In summary, while some existing technologies possess automated devices for grinding template surfaces, they are not suitable for grinding the outer walls of tunnel arch trolleys. Furthermore, even if some equipment could be applied to grinding the outer walls of tunnel arch trolleys, current grinding devices still suffer from the following problems:

[0006] 1. The equipment has a complex structure and requires a high level of professional skills from operators. Construction site workers are often not professional technicians, but rather ordinary workers, which presents difficulties in both operation and maintenance.

[0007] 2. High equipment costs. High technology means high equipment costs, and high repair costs after damage. Grinding the outer wall of the tunnel arch trolley is a finishing touch, not inherently a highly technical task. Its main challenges lie in the safety of the workers and the ease of operation. Using high-cost specialized equipment to grind the outer surface of the tunnel arch trolley is a very cost-effective operation for the entire project, making it difficult to promote and apply in the tunnel construction field.

[0008] 3. Once applied to the outer wall of the tunnel arch trolley, it cannot be moved or is inconvenient to move, and can only be used for fixed-point grinding.

[0009] Therefore, it is necessary to design a low-cost and easily movable tool suitable for grinding the outer wall of a tunnel arch trolley, in order to improve construction efficiency, ensure safety, and solve many problems caused by erecting scaffolds and carrying out manual grinding. Utility Model Content

[0010] This utility model provides a mobile platform for construction work on the outer wall of a tunnel arch trolley, replacing traditional scaffolding. It has a simple structure, is easy to operate, and is highly safe. It can move freely on the outer wall of the tunnel arch trolley, solving the problems caused by erecting scaffolding for grinding in the prior art.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0012] A mobile platform for tunnel arch trolley outer wall construction includes an arc-shaped main beam, a sliding assembly, a guardrail, a working platform, and a traction device. The arc-shaped main beam comprises two arc-shaped steel frames whose shapes match the outer wall of the tunnel arch trolley, and a plurality of transverse connecting rods evenly distributed between the two arc-shaped steel frames and perpendicular to them. All arc-shaped steel frames and transverse connecting rods are fixed to form a rigid frame structure. The sliding assembly is installed at the bottom of the arc-shaped main beam. The guardrail is perpendicular to the plane of the rigid frame structure, and its lower end is welded to the arc-shaped steel frame, and the guardrail is arranged along the length direction of the arc-shaped main beam. The working platform is set on the transverse connecting rods. Horizontal guide plates are also provided at both ends of the arc-shaped main beam, and the traction device is connected to the arc-shaped main beam through the horizontal guide plates.

[0013] Furthermore, the traction device includes a traction machine connected to the horizontal guide plate, guide rails installed on both sides of the tunnel arch trolley, and guide wheels matched with the guide rails; one end of the horizontal guide plate is connected to the arc-shaped main beam by bolts, and the guide wheel is fixed to the other end of the horizontal guide plate; the guide wheel has its own brake.

[0014] Furthermore, the traction machine is connected to the horizontal guide plate via a steel wire rope.

[0015] Furthermore, the sliding component includes a plurality of pulley groups, all of which are evenly distributed along the length direction of the arc-shaped main beam. Each pulley group includes two pulleys symmetrically arranged at the bottom of the arc-shaped main beam. The pulleys are equipped with brakes by themselves.

[0016] Preferably, a rubber layer is provided on the outer surface of the pulley.

[0017] Preferably, the operation platform is a steel plate horizontally arranged on the transverse connecting rod, and the steel plates correspond to the transverse connecting rods one by one. All the steel plates, the transverse connecting rods and the arc-shaped main beam form a ladder structure. Construction workers can stand on different steel plates to polish different positions on the outer wall of the tunnel vault trolley.

[0018] In order to improve safety and prevent construction workers from slipping on the support, anti-slip stripes are provided on the upper surface of the steel plate.

[0019] In order to better protect construction workers and prevent them from falling from the support, the height of the guardrail is at least 1 meter and it is welded by steel pipes. If necessary, a safety belt can also be added to the guardrail. One end of the safety belt is fixed to the guardrail and the other end is tied to the waist of the construction worker. In this way, it not only does not affect the grinding operation, but also further improves the safety of construction workers, hardly increases the cost, and is easy to operate.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. By setting an arc-shaped main beam matching the curvature of the outer wall of the tunnel vault trolley, the utility model can make the arc-shaped main beam closely adhere to the outer wall of the tunnel vault trolley to the greatest extent, providing convenience for construction workers to stand on the arc-shaped main beam for grinding construction. The sliding component supporting the arc-shaped main beam not only plays a role in supporting the arc-shaped main beam, but also provides a basis for the entire support to freely move on the outer wall of the tunnel vault trolley, achieving two purposes with one action. The configured traction device can provide power for the entire support to move freely. Only by controlling the brakes of the traction machine, guide wheels and pulleys, the movement and braking of the entire support on the outer wall of the tunnel vault trolley can be completed. Compared with the traditional scaffolding, during the construction process of this technology, when changing the grinding position, construction workers do not need to leave the support, nor do they need to manually move the support away from the tunnel vault trolley, thus realizing continuous operation of the grinding construction on the outer wall of the tunnel vault trolley, greatly improving the construction efficiency, saving manpower and material resources, and avoiding interference with the standardized management of the construction site and other processes.

[0022] 2. In this utility model, the arc-shaped main beam and the horizontal guide plate are connected by bolts, and the two can be separated. After separation, the arc-shaped main beam and the horizontal guide plate can be placed and transported separately. Compared with irregular structures that cannot be separated, not only is the length reduced, but the shape of the individual components is also more regular, which to a certain extent realizes the modularization of the support, making its storage and transportation more convenient.

[0023] 3. This utility model can distribute the weight of the arc-shaped main beam and the construction personnel to the guide rails on both sides of the tunnel arch trolley by using a horizontal guide plate, thereby making the force on the entire support more uniform, reducing the burden on the pulleys, and avoiding damage that may be caused by localized stress on the tunnel arch trolley.

[0024] 4. The rubber layer on the outer surface of the pulley significantly increases the friction between the pulley and the outer wall of the tunnel arch trolley, improving the stability of the entire support structure on the tunnel arch trolley's outer wall after the guide wheel brakes. Simultaneously, the rubber layer reduces vibration during pulley movement, improving the comfort of construction workers standing on the support structure. Furthermore, the rubber layer also provides some protection for the pulley, reducing wear on the tunnel arch trolley's outer wall and extending its service life.

[0025] 5. This utility model provides safety protection for construction workers from multiple angles, including guardrails, anti-slip stripes on steel plates, rubber layers on pulleys, and brake control of guide wheels and pulleys. It effectively ensures the personal safety of construction workers without increasing equipment costs or operational difficulty.

[0026] 6. The overall structure of this utility model is simple, requiring no professional technical skills from operators; ordinary construction workers can operate it. Furthermore, it uses conventional consumables, requiring only ordinary steel, steel plates, screws, and other common components for welding, resulting in low cost. No special maintenance is needed, and all parts can be disassembled and reused at the next construction site after completion. It is highly practical and cost-effective, solving the problems of complex structure, high cost, and difficult maintenance of existing equipment, making it very suitable for widespread application in tunnel construction. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one side of the structure of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of another side of the structure of an embodiment of the present utility model;

[0029] Figure 3 Appendix to the embodiments of this utility model Figure 1 A magnified structural diagram at point A.

[0030] In the above figures, the component names corresponding to the reference numerals are as follows:

[0031] 1. Curved main beam; 2. Sliding assembly; 3. Guardrail; 4. Working platform; 5. Traction device; 6. Arched trolley; 7. Guide rail platform; 10. Curved steel frame; 11. Horizontal connecting rod; 20. Pulley; 21. Rubber layer; 50. Horizontal guide plate; 51. Guide rail; 52. Guide wheel; 53. Traction machine; 54. Wire rope; 55. Drum. Detailed Implementation

[0032] Example

[0033] Please see Figure 1-3 This utility model provides a mobile platform for tunnel arch roof construction, comprising an arc-shaped main beam 1, a sliding assembly 2, a guardrail 3, a working platform 4, and a traction device 5. The arc-shaped main beam 1 is the core component of the entire support structure. Its shape is the same as the curvature of the tunnel arch, but its dimensions are slightly larger to ensure the support can fit snugly against the outer surface of the tunnel arch. The arc-shaped main beam 1 includes two arc-shaped steel frames 10 arranged side-by-side on the same horizontal plane, and multiple transverse connecting rods 11 positioned between the two arc-shaped steel frames 10. All transverse connecting rods 11 are located on the same horizontal plane as the two steel frames 10 and are vertically fixed and welded, forming an arc-shaped frame structure similar to a tunnel arch. A horizontal guide plate 50 is bolted to each end of the arc-shaped main beam 1. The horizontal guide plate 50 is detachable from the arc-shaped main beam 1 but cannot be bent or rotated; its other end is connected to the traction device 5.

[0034] The sliding assembly 2 includes multiple pulley sets, all of which are evenly distributed along the length of the arc-shaped main beam 1. Each pulley set contains two symmetrically arranged pulleys 20, which are mounted on the bottom of the arc-shaped frame structure via bearings. To improve stability in a static state, a braking device is installed on the pulleys; activating the braking device completely restricts pulley rotation. A rubber layer 21 is provided on the outer surface of the pulleys 20 to protect them, reduce wear, and increase friction with the outer wall of the tunnel arch, thereby improving the stability of the entire support system in both static and sliding states.

[0035] Guardrail 3 is installed on both sides of the curved main beam 1, arranged along the length of the curved main beam 1. The guardrail 3 is at least 1 meter high and is made of welded steel pipes. It can be used as a handrail for construction workers and also provides safety protection for them. To enhance the protection, safety belts can be added to the guardrail. One end of the safety belt is fixed to the guardrail, and the other end is tied around the waist of the construction worker. This does not hinder construction and improves the safety protection effect.

[0036] The working platform 4 consists of steel plates corresponding one-to-one with the transverse connecting rods 11, horizontally welded to the transverse connecting rods 11, forming an arc-shaped staircase. Anti-slip stripes are provided on the surface of the steel plate that contacts the worker's feet to prevent the worker from slipping while standing on the steel plate.

[0037] The traction device 5, used to drive the support to slide on the outer wall of the arch trolley, includes a guide rail 51, guide wheel 52, traction machine 53, and wire rope 54. The guide rail 51 is parallel to the guide rail platform 7 on both sides of the arch trolley. The guide rail 51 consists of two steel rails and is detachably bolted to the guide rail platform 7. After grinding is completed, the guide rail 51 can be detached and moved to the next position for reuse. The guide wheel 52 is fixed below the horizontal guide plate 50 and is a brake wheel with a braking mechanism. One end of the wire rope 54 is wound on the drum 55 inside the traction machine 53, and the other end is fixed to the horizontal guide plate 50. One traction machine 53 can be installed, or multiple machines can be installed, depending on the actual site conditions and needs. If only one machine is installed, it is installed in the forward direction of the support, only driving the support forward. If the support needs to move backward, another traction machine can be installed in the opposite direction. The traction machine in the forward direction releases the wire rope, and the traction machine in the backward direction rewinds the wire rope, thus achieving the reverse movement of the support.

[0038] The specific operating method is as follows:

[0039] First, in the non-use state, the arc-shaped main beam 1, sliding component 2, guardrail 3, and working platform 4 in this solution are a single unit. The horizontal guide plate 50 and traction device 5 are independent auxiliary components, which need to be temporarily installed according to the site conditions during construction. After the guide rail 51 is built on the guide rail platform 7, one end of the horizontal guide plate 50 is fixed to the end of the arc-shaped main beam 1 with bolts, and the guide wheel 52 at the other end is placed inside the guide rail 51 to ensure that it can move freely within the guide rail 51. Finally, both ends of the wire rope 54 are fixed to the drum 55 inside the traction machine and the horizontal guide plate 50. At this point, the equipment assembly is complete.

[0040] The brakes on guide wheel 52 are controlled by the operator of the traction machine 53, while the brakes on pulley 20 are controlled by the grinding workers. When the support needs to be moved, the brakes on guide wheel 52 and pulley 20 are first deactivated, allowing both to move freely. Then, the traction machine 53 is started, the drum 55 winds up, and the wire rope 54 is pulled up. The force of the traction machine is transmitted through the wire rope to the curved main beam 1 and the entire support, moving the entire support with the cooperation of guide wheel 52 and pulley 20. Once the support has reached the predetermined position, the brakes on the guide wheel and pulley are released, preventing further movement. At this point, workers pass through the horizontal guide plate 50 and onto the work platform 4 to begin grinding the outer wall of the arched trolley. If necessary, safety belts can be fastened around the workers' waists to improve safety. Workers only need to move on the work platform to complete operations on different positions of the arched trolley within the same circumference.

[0041] When the support structure needs to be moved on the arch trolley, the workers do not need to leave the support structure. They only need to notify the traction machine operator to close the guide wheel brake, and simultaneously close the pulley brake themselves. Then, the traction machine operator starts the traction machine to move the support structure. This effectively saves the time and effort of the workers in moving the support structure, greatly improving the efficiency of the grinding process. Furthermore, the pulley brake and the guide wheel brake are controlled by different personnel, effectively avoiding safety hazards caused by misoperation by any worker. In particular, the pulley brake being controlled by the grinding worker themselves provides greater peace of mind and significantly improves safety.

[0042] After the grinding work is completed, the workers leave the work platform 4, release the steel wire rope 54 from the horizontal guide plate 50, completely retract the steel wire rope 54 into the drum 55 of the traction machine, remove the bolts between the horizontal guide plate 50 and the arc-shaped main beam 1, and then remove the guide rail 51. This makes both storage and transportation very convenient.

[0043] Grinding the outer wall of a tunnel arch trolley does not require expensive, complex, or highly specialized equipment. Instead, it requires simple, low-cost, safe, and stable tools—only such tools offer high cost-effectiveness. This utility model discloses a mobile support for grinding the outer wall of a tunnel arch trolley. It is specifically designed for grinding the outer wall of an arch trolley. It is not only simple in structure and uses common materials, but also easy to operate, highly safe, and efficient. It is reusable, convenient to store and transport, and has extremely high practical value. More importantly, it is not only applicable to grinding the outer wall of an arch trolley, but can be used for any construction work on the outer wall of an arch trolley.

[0044] In this utility model, the guide wheel with built-in brake, the pulley with built-in brake, the traction machine, the guide rail and other equipment are all mature products on the market, which can be directly purchased, installed and used. Moreover, these devices have been widely used in various fields, and those skilled in the art are familiar with their usage methods, so there is no technical threshold.

[0045] The above description is merely one embodiment of this utility model and is not intended to limit this utility model in any way. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of this utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model without departing from the scope of this utility model's technical solution shall still fall within the scope of this utility model's technical solution.

Claims

1. A mobile platform for tunnel arch roof trolley outer wall construction, characterized in that: The system includes an arc-shaped main beam (1), a sliding assembly (2), a guardrail (3), a working platform (4), and a traction device (5). The arc-shaped main beam (1) includes two arc-shaped steel frames (10) whose shapes match the outer wall of the tunnel arch trolley, and several transverse connecting rods (11) evenly distributed between the two arc-shaped steel frames (10) and perpendicular to them. All arc-shaped steel frames (10) and transverse connecting rods (11) are fixed to form a rigid frame structure. The sliding assembly (2) is installed at the bottom of the arc-shaped main beam (1). The guardrail (3) is perpendicular to the plane where the rigid frame structure is located, and its lower end is welded to the arc-shaped steel frame (10). The guardrail (3) is arranged along the length direction of the arc-shaped main beam (1). The working platform (4) is set on the transverse connecting rods (11). Horizontal guide plates (50) are also set at both ends of the arc-shaped main beam (1). The traction device (5) is connected to the arc-shaped main beam (1) through the horizontal guide plates (50).

2. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 1, characterized in that: The traction device (5) includes a traction machine (53) connected to the horizontal guide plate (50), a guide rail (51) installed on both sides of the tunnel arch trolley, and a guide wheel (52) matched with the guide rail (51); one end of the horizontal guide plate (50) is connected to the arc-shaped main beam (1) by bolts, and the guide wheel (52) is fixed to the other end of the horizontal guide plate (50); the guide wheel (52) has its own brake.

3. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 2, characterized in that: The traction machine (53) is connected to the horizontal guide plate (50) via a steel wire rope (54).

4. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 3, characterized in that: The sliding assembly (2) includes multiple pulley groups, all of which are evenly distributed along the length of the arc-shaped main beam (1). Each pulley group includes two pulleys (20) symmetrically arranged at the bottom of the arc-shaped main beam (1).

5. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 4, characterized in that: The pulley (20) has a built-in brake.

6. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 5, characterized in that: The outer surface of the pulley (20) is provided with a rubber layer (21).

7. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 6, characterized in that: The working platform (4) is a steel plate horizontally set on the transverse connecting rod (11), and the steel plate corresponds one-to-one with the transverse connecting rod (11).

8. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 7, characterized in that: The upper surface of the steel plate is provided with anti-slip stripes.

9. The mobile platform for tunnel arch roof trolley outer wall construction operation according to claim 8, characterized in that: The guardrail (3) is at least 1 meter high and is made of welded steel pipes.

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