A shield trolley suitable for operating high-speed uninterrupted traffic maintenance construction and a construction method thereof

Abstract

A shield trolley suitable for operating high-speed uninterrupted traffic maintenance construction and a construction method thereof adopt a portal truss overall structure of "lower passage and upper construction", which comprises a bottom passage layer, a middle bearing layer and a top construction layer, and integrates a walking system, a protection system, an intelligent early warning system and a power system. The bottom passage layer reserves a driving passage, the middle bearing layer is a high-strength truss main frame, and the top construction layer is provided with a liftable and telescopic multifunctional construction platform. The physical isolation of the construction area and the driving area is realized by the rigid protection shell, the safety of people and vehicles is ensured, the full-face maintenance operation of the tunnel under the condition of uninterrupted traffic is realized, and the construction efficiency and engineering quality are effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of mechanical structure technology, specifically relating to a shield trolley suitable for uninterrupted traffic maintenance construction on high-speed roads and its construction method. Background Technology

[0002] With the continuous expansion of my country's highway construction scale, early-built highway tunnels, limited by the construction technology and processes at the time, have gradually revealed problems such as water seepage, leakage, and cracking during long-term operation. To ensure operational safety, the treatment and reinforcement of these tunnels has become a key focus of maintenance work. However, traditional highway tunnel maintenance methods, such as erecting scaffolding for arch work or using temporary protective facilities for road closures, require closing part or all lanes, or even interrupting traffic. This not only leads to severe traffic congestion and significantly reduces road capacity and service levels, but also poses significant safety risks to construction workers and passing drivers. Especially in the enclosed, low-visibility space of tunnels, the risk of mixed pedestrian and vehicle traffic and vehicles accidentally entering work areas is extremely high. Traditional flexible protective facilities such as water-filled barriers and crash barriers have weak impact resistance and cannot provide reliable protection; the consequences of an accident would be unimaginable.

[0003] To address the aforementioned issues, the industry is continuously exploring technologies and equipment capable of tunnel maintenance and construction without disrupting traffic. While some simple mobile work platforms or temporary protective devices have been applied, they still have significant shortcomings in terms of safety, efficiency, standardization, and structural stability. For example, some existing solutions use simple steel protective plates for isolation, but their protection level is low and they lack integration with the work platform, making it difficult to achieve efficient and continuous mechanized operations. Furthermore, existing equipment is complex to operate in terms of relocation, positioning, and fine-tuning within tunnels, with low automation levels, failing to meet the stringent requirements of modern highway maintenance for safety, efficiency, and traffic flow assurance. Therefore, developing a new type of equipment that can provide high-strength, fully enclosed physical isolation for tunnel maintenance and construction without disrupting traffic, and that integrates a multi-functional work platform and intelligent control system, has become a pressing technical challenge in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a shield trolley suitable for uninterrupted traffic maintenance on highways, addressing the problems of traffic interruption, insufficient safety protection, and low operational efficiency in existing tunnel maintenance projects. The core objective of this invention is to eliminate the risk of conflict between construction and traffic from the source by constructing a novel construction mode of "operation on the platform, traffic flowing underneath," ensuring the safety of personnel and vehicles, achieving continuous road traffic capacity, and significantly improving maintenance efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows:

[0006] This invention provides a shield trolley suitable for uninterrupted traffic maintenance on operating highways, comprising: A portal truss main body, wherein the portal truss main body forms a bottom passage layer, a middle load-bearing layer and a top working layer in sequence along the vertical direction; the bottom passage layer is configured as a driving passage that allows vehicles to pass through; and the top working layer is equipped with a multi-functional working platform that can be raised, lowered and extended. A walking system, installed at the bottom of the portal truss body, is used to drive the shield trolley to move; The protective system, installed on the main body of the portal truss, is used to physically isolate the construction area from the traffic area in the middle load-bearing layer; The power system, installed on the main body of the portal truss, is used to provide power for the walking system and maintenance equipment.

[0007] Furthermore, the walking system includes: The drive wheels include wheel boxes, solid rubber wheels, wheel hubs, axles, tapered roller bearings, sprockets, chains, and motor reducers; Driven wheels include wheel boxes, solid rubber wheels, wheel hubs, wheel axles, and tapered roller bearings; The lifting and translating system includes a lifting cylinder, a lifting telescopic rod, a translating slide plate, a hook plate that cooperates with the translating slide plate, a translating cylinder, and a translating trestle. The lifting and translating system is used to lift the driving wheels and the driven wheels off the ground or lower them to contact the ground.

[0008] Furthermore, the protection system includes: The steel shield is formed by fully enclosing the portal frame beams and the inside of the portal frame columns of the main portal truss body with steel plates; A rockfall protection structure is installed on the top working layer; Fall protection railings for working at heights are installed at the edge of the top working level. An emergency escape route is provided on the main body of the portal truss.

[0009] Furthermore, it also includes an intelligent early warning system, which includes a rotating buzzer alarm light, an LED light strip, and an LED advertising screen. The rotating buzzer alarm light is synchronized with the walking system, and when the walking system is started, the rotating buzzer alarm light emits an audible and visual alarm.

[0010] Furthermore, the power system includes a diesel generator set, a mains power access unit, and an automatic transfer switch, which is used to switch between the diesel generator set and the mains power access unit to provide uninterrupted power.

[0011] Furthermore, the shield trolley is a shield installation trolley, and its top working layer integrates a corrugated steel plate lifting / translation system. The corrugated steel plate lifting / translation system includes a translation bottom beam, a translation trolley, a translation trolley, a lifting cylinder, a translation cylinder, and a lifting arc beam.

[0012] Furthermore, the main body of the portal truss adopts a modular splicing structure, with a total length ranging from 6 meters to 24 meters and a total width ranging from 4 meters to 12 meters. The main structure is made of Q355B high-strength steel.

[0013] On the other hand, this application also claims protection for a method for uninterrupted traffic maintenance construction on high-speed roads using the shield trolley described in any of the foregoing claims, characterized by comprising the following steps: Step 1, Preparations before the trolley moves: Check whether the lifting cylinder (51) of the lifting and translating system (50) has been fully retracted so that the translating trolley (54) is off the ground, the driving wheels (40) and the driven wheels (41) are on the ground, retract the side platform, clean the ground and the items around the trolley, and organize the cables. Step 2, Trolley travel and positioning: Start the travel system and drive the shield trolley to move longitudinally along the tunnel to the predetermined working position. During the travel, warnings are given by rotating buzzer alarm lights and alarm sounds. Step 3, Trolley positioning and support: By extending the lifting cylinder (51) of the lifting and translation system (50), the driving wheels (40) and the driven wheels (41) are lifted off the ground, so that the translation trolley (54) is grounded and supported. The trolley is then laterally adjusted to the center line position of the tunnel by the translation cylinder (55) in conjunction with the translation slide plate (53) and the hook plate. Step 4, Top Operation: The tunnel full-section maintenance operation is carried out on the multi-functional work platform (15) of the top work layer (13). During the operation, the construction area is completely isolated from the traffic lane (14) by the steel shield (30).

[0014] Furthermore, in step four, the maintenance work is the installation of corrugated steel sheets, including: The corrugated steel sheets are connected to the transport trolley using a corrugated steel sheet lifting / translation system. The corrugated steel plate is lifted to the designed installation height by driving the lifting arc beam with a lifting cylinder; The steel corrugated sheet is adjusted laterally and longitudinally to the predetermined installation position by driving the translation trailer with the translation cylinder, thus completing the installation.

[0015] Furthermore, following step four, the following is also included: Step 5, trolley relocation: by retracting the lifting cylinder (51) of the lifting and translating system (50), the translating trolley (54) is lifted off the ground, the driving wheels (40) and driven wheels (41) are brought to the ground, and the walking system is started to move the trolley to the next working position; Step six: Repeat steps three through five until all maintenance work is completed.

[0016] Compared with the prior art, the present invention achieves the following beneficial technical effects: This invention utilizes a portal truss structure that allows for "operation on the platform and traffic underneath," creating a strong physical barrier between the construction area and the traffic area. This completely eliminates the safety risks of mixed pedestrian and vehicle traffic, enabling uninterrupted traffic flow during tunnel maintenance operations. Simultaneously, the trolley integrates a liftable work platform and multi-functional modules, supporting simultaneous operation of multiple processes. This significantly improves maintenance efficiency and project quality, effectively reducing the overall maintenance cost throughout the entire lifecycle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the shield trolley in an embodiment of the present invention; Figure 2 This is a schematic diagram of the gantry assembly and shield system structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the walking system and lifting and translating system in an embodiment of the present invention; The reference numerals in the attached drawings are explained as follows: 10. Main gantry truss; 11. Bottom passageway; 12. Middle load-bearing layer; 13. Top working layer; 14. Driving passage; 15. Multifunctional work platform; 21. Gantry crossbeam; 22. Gantry column; 23. Lower longitudinal beam; 24. Gantry longitudinal connecting beam; 25. Gantry scissor brace; 30. Steel shield; 31. Rockfall protection structure; 32. High-altitude operation fall protection railing; 33. Emergency escape passage; 40. Driven wheels; 41. Driven wheels; 50. Lifting and translating system; 51. Lifting cylinder; 52. Lifting telescopic rod; 53. Translation slide plate; 54. Translation trestle; 55. Translation cylinder. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a shield trolley suitable for uninterrupted traffic maintenance on operating highways. Its core design concept is a portal truss structure with a "bottom passage, top operation" configuration, dividing the trolley into three functional layers to achieve complete physical isolation between the work area and the traffic area. Specifically, the bottom passage layer adopts an arch / portal corridor design, reserving standard highway traffic lanes to meet normal vehicle passage needs without altering the original lane's function; the middle load-bearing layer is a high-strength truss main frame, bearing the entire load of the protective structure, work platform, and equipment system, while also serving as the main structure for side isolation and protection; the top work layer integrates a liftable and extendable multi-functional work platform, equipped with the necessary power, tools, and safety protection facilities, achieving full-section maintenance coverage. The trolley adopts a modular splicing design, with its main body length and width flexibly adjustable according to the work scenario. It is equipped with four core systems: a walking system, a protective system, an intelligent early warning system, and a power system, forming an integrated "protection-operation-walking" specialized maintenance equipment.

[0021] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] In one embodiment of this application, such as Figure 1As shown, the shield trolley has a portal truss structure, including a portal truss main body 10. This portal truss main body 10 vertically forms a bottom passage layer 11, a middle load-bearing layer 12, and a top working layer 13. The bottom passage layer 11 adopts an arched corridor design, with a reserved driving passage 14. The driving passage 14 has a clearance of not less than 5 meters and a clearance of not less than 3.75 meters, which can meet the normal passage requirements of standard highway vehicles without closing lanes or interrupting traffic. The middle load-bearing layer 12 is a high-strength truss main frame, welded or bolted from Q355B high-strength steel, used to bear the entire load of the protective structure, working platform, and equipment system. It also serves as the main structure for side isolation protection, resisting lateral vehicle collision impacts. The top working layer 13 is equipped with a liftable and retractable multi-functional working platform 15. This platform can be adjusted vertically and laterally according to the height and curvature of the tunnel arch, thereby covering the maintenance work of the entire tunnel section, including arch defect treatment, leakage control, structural reinforcement, and electromechanical maintenance. The travel system is installed at the bottom of the portal truss main body 10, specifically below the lower longitudinal beam 23, and is used to drive the entire trolley to move within the tunnel. The protection system is installed on the portal truss main body 10, mainly forming a physical barrier in the area of ​​the middle load-bearing layer 12 that completely isolates the construction area from the travel area. The power system is installed on the portal truss main body 10, usually fixed to the side of the lower longitudinal beam 23 or the portal column 22, providing power to the travel system, working platform, and various tools. Through the combination of the above-mentioned portal truss main body 10, walking system, protection system and power system, the trolley can provide a safe and enclosed construction space for workers under the condition that vehicles can pass normally, realizing the construction mode of "working on the platform and vehicles passing underneath".

[0023] In one embodiment of this application, the specific configuration of the walking system is as follows: Figure 3As shown. The walking system includes drive wheels 40 and driven wheels 41. The drive wheels 40 consist of a wheel box, solid rubber wheels, a hub, an axle, tapered roller bearings, sprockets, a chain, and a motor reducer. One is installed on each side. The motor uses an electromagnetic brake motor, enabling precise start / stop and self-locking. The driven wheels 41 also consist of a wheel box, solid rubber wheels, a hub, an axle, and tapered roller bearings. One is also installed on each side, and together with the drive wheels 40, they support the weight of the trolley and enable movement. The entire walking system allows for stepless speed regulation and features automatic correction and triple braking protection functions to ensure the accuracy and safety of the trolley's movement within the tunnel. In addition, the walking system integrates a lifting and translating system 50. This lifting and translating system 50 includes a lifting cylinder 51, a lifting telescopic rod 52, a translating slide plate 53, a hook plate that cooperates with the translating slide plate 53, a translating cylinder 55, and a translating trestle 54. Specifically, the lifting cylinder 51 is installed vertically, and its piston rod is connected to the lifting telescopic rod 52. When the cylinder extends, it can lift the entire trolley, allowing the traveling wheels to contact the ground. When the cylinder retracts, the entire trolley lowers, the front and rear outriggers (i.e., the translation trestles 54) support the ground, and the tires are off the ground to prevent the solid rubber wheels from aging and deforming due to prolonged pressure. The translation slide plate 53 and the hook plate are installed between the outriggers and the gantry. The translation cylinder 55 is set horizontally. By pushing the relative movement of the translation slide plate 53 and the hook plate, the trolley can be finely adjusted laterally (left and right). The adjustment range on one side can reach 50 mm, thus easily aligning the center line of the trolley with the center line of the tunnel. The core function of the lifting and translation system 50 is to lower the tires to contact the ground before travel, raise the tires during operation to provide stable support for the outriggers, and precisely adjust the position of the trolley through the translation function.

[0024] In one embodiment of this application, the specific configuration of the protection system is as follows: Figure 2As shown. The protective system includes a steel shield 30, a rockfall protection structure 31, a high-altitude work fall arresting guardrail 32, and an emergency escape passage 33. The steel shield 30 is formed by fully enclosed welding or riveting of 1.5 mm thick steel plates below the portal frame crossbeam 21 and inside the portal frame columns 22 of the main truss 10, creating a rigid shell that completely isolates the driving lane from the work area. This steel shield effectively resists accidental vehicle collisions, preventing vehicles from entering the work area, and also prevents tools, materials, or personnel from falling from a height onto the driving lane. The rockfall protection structure 31 is installed above the top working layer 13 and is typically a high-strength steel wire mesh or grating, used to catch loose rocks or concrete blocks that may fall from the tunnel arch, protecting workers below. The high-altitude work fall arresting guardrail 32 is installed at the edge of the top working layer 13, at a height of not less than 1.2 meters, and is equipped with a central crossbar and kickboard to prevent accidental falls. Emergency escape routes 33 are located on the main body of the portal truss 10. They are typically inclined or straight ladders leading directly from the top working level 13 to the ground, and are equipped with safety doors and signs to allow workers to evacuate quickly in the event of an emergency. These multiple protective structures together create a safe construction environment, completely eliminating core safety hazards such as mixed pedestrian and vehicle traffic, falls from heights, and falling objects.

[0025] In one embodiment of this application, the shield trolley also includes an intelligent early warning system. This intelligent early warning system includes a rotating buzzer alarm light, LED light strips, and an LED advertising screen. The rotating buzzer alarm light is installed at both the front and rear ends of the trolley and is linked to the travel system: when the trolley is powered on, the rotating alarm light illuminates; when the travel system starts, the buzzer emits an intermittent alarm sound to alert passing vehicles and nearby personnel to take evasive action. The LED light strip is installed along the gantry beam 21 and gantry column 22, providing continuous working illumination and improving visibility conditions during construction in dim lighting conditions within the tunnel. The LED advertising screen is located on the side of the trolley facing the direction of travel and can scroll through safety warning information such as "Construction Ahead, Slow Down" and "Height and Width Restrictions," serving as an active early warning and guidance mechanism. Through the aforementioned combination of sound, light, and electricity in the early warning system, the trolley can significantly reduce the risk of traffic accidents within the operating tunnel.

[0026] In one embodiment of this application, the power system employs a redundant design with dual power supply from a diesel generator set and mains power. Specifically, it includes a diesel generator set, a mains power connection unit, and an automatic transfer switch. The automatic transfer switch monitors the voltage status of the mains power connection unit in real time. When the mains power is normal, it prioritizes using mains power to power the entire machine. When the mains power fails or the voltage is abnormal, the automatic transfer switch switches to the diesel generator set without interruption within 10 seconds, allowing the generator to continue supplying power and ensuring that the trolley's movement, hydraulic operation, lighting, and early warning systems do not cease operation due to power outages. The power system is also equipped with cable conduits, with the main cable being a heavy-duty rubber-sheathed flexible cable, and a dedicated cable reel for winding and unwinding to prevent the cable from being crushed or dragged during movement. Through dual power supply and automatic switching, the trolley can adapt to the complex power supply environment within the tunnel, ensuring the continuity and safety of construction.

[0027] In one embodiment of this application, the shield trolley is a shield installation trolley specifically designed for the installation of corrugated steel sheets. Its top working layer 13 also integrates a corrugated steel sheet lifting / translation system. This system consists of a translation base beam, a translation trailer, a translation trolley, a lifting cylinder, a translation cylinder, and a lifting arc beam. The specific working process is as follows: First, the pre-assembled corrugated steel sheets from outside the tunnel are transported longitudinally to the area below the installation trolley by the matching transport shield trolley; then, the corrugated steel sheet lifting / translation system on the installation trolley uses the translation trolley to transfer the corrugated steel sheets from the transport trolley; next, the lifting cylinder drives the lifting arc beam to lift the corrugated steel sheets to the designed installation height; finally, the translation cylinder pushes the translation trailer, precisely aligning the corrugated steel sheets with the predetermined positions of the tunnel lining in both the transverse and longitudinal directions, completing the installation. This system enables mechanized and high-precision installation of large-size corrugated steel sheets, significantly reducing manual labor intensity and improving installation quality and efficiency.

[0028] In one embodiment of this application, the portal truss main body 10 adopts a modular splicing structure design. Specifically, the portal beam 21, portal column 22, lower longitudinal beam 23, portal longitudinal connecting beam 24, and portal scissor brace 25 are all manufactured according to standard modules. The components are connected by high-strength bolts and locating pins, eliminating the need for on-site welding. Depending on the cross-sectional dimensions and working length requirements of different tunnels, the total length of the portal truss main body 10 can be flexibly spliced ​​within the range of 6 meters to 24 meters, and the total width can be adjusted within the range of 4 meters to 12 meters. The main structure is uniformly made of Q355B high-strength steel, which has excellent mechanical and weldability properties, ensuring the structural safety of the trolley under construction loads and accidental impacts. The modular design not only facilitates the transportation and rapid on-site assembly of the trolley but also allows users to flexibly configure the trolley specifications according to actual project needs, reducing manufacturing costs and warehousing pressure.

[0029] The following combination Figures 1 to 3The key components and their connection relationships in the above embodiments will be further explained. For example... Figure 2 As shown, the gantry assembly consists of gantry crossbeams 21, gantry columns 22, lower longitudinal beams 23, gantry longitudinal connecting beams 24, and gantry scissor braces 25, which are bolted together to form a stable spatial truss system. The scissor braces 25 are arranged in an X-shape to enhance the lateral stiffness of the gantry. A steel shield 30 covers the lower surface of the gantry crossbeams 21 and the inner surface of the gantry columns 22, forming a complete enclosed shell.

[0030] During implementation, the operating environment for the trolley is as follows: ambient air temperature range -10℃ to +40℃, and the concentration of dust, acid, corrosive gases, or substances in the surrounding air does not exceed normal levels. Before operation, a series of preparatory work is required: check whether the lifting cylinder 51 of the lifting and translating system 50 is completely off the ground, confirming that the translating support 54 is stably supported; check whether the side platform pull rod is fully retracted to prevent interference with other objects during movement; clean the ground and surrounding items of the trolley, and tidy up the cables. A designated person must be responsible for operation and must be qualified through training. The anti-wear hydraulic oil level of the hydraulic station must be checked daily, and the control circuit must be checked periodically. After each work cycle, check whether the connecting bolts are loose and whether the pins are reliable. Special attention should be paid to prevent deviation during each movement of the trolley. If deviation is detected, the translating cylinder 55 and the hook plate in the lifting and translating system 50 can be used to adjust the trolley laterally to the centerline of the tunnel.

[0031] In summary, the shield trolley provided by this invention, through its innovative "underpass and top operation" structure, modular design, and highly integrated operation, protection, movement, early warning, and power systems, effectively solves the core contradiction between safety and traffic flow in the maintenance and construction of tunnels on operating highways. It can safely, efficiently, and with high quality complete the full-section maintenance of tunnels without interrupting traffic, and has extremely high practical value and prospects for promotion.

[0032] In one embodiment of this application, the complete operation process for the uninterrupted traffic maintenance construction method for high-speed operations using the aforementioned shield trolley is as follows: First, preparations are made before the trolley moves: the operator needs to check whether the lifting cylinder 51 of the lifting and translating system 50 is fully retracted, confirm that the translating support 54 is completely off the ground, and that the driving wheels 40 and driven wheels 41 are on the ground to prevent damage to the translating support and lifting telescopic rod during trolley movement; at the same time, check whether the lateral platform pull rod is fully retracted to prevent interference with other objects in the tunnel during trolley movement; clear debris and gravel from the ground to prevent the trolley from failing to make effective contact with the ground and damaging parts after it is in position; remove all items around the trolley to prevent collisions during movement; and organize the trolley's cables to prevent them from being run over or snagged during movement. After the above preparations are completed, the walking system can be started to drive the shield trolley to move longitudinally along the tunnel to the predetermined working position. During the trolley's movement, operators must closely observe whether it collides with other objects and whether the cable is being pulled smoothly. If any problems occur, the trolley must be stopped immediately, the problem rectified, and movement resumed. During movement, a rotating buzzer alarm light will continuously illuminate and an alarm sound will be emitted to warn passing vehicles and nearby personnel. After the trolley reaches the designated work position, the lifting cylinder 51 of the lifting and translating system 50 extends, lifting the drive wheels 40 and driven wheels 41 off the ground, allowing the translation trolley support 54 to touch the ground and securely support the trolley. Then, the translation cylinder 55, in conjunction with the translation slide plate 53 and the hook plate, will laterally adjust the trolley to the tunnel centerline position, ensuring precise positioning. Once the trolley is positioned and securely supported, operators can carry out full-section tunnel maintenance work on the multi-functional work platform 15 on the top work layer 13, including arch grouting, steel strip installation, leakage repair, crack treatment, and anchor drilling. Throughout the entire operation, the steel shield 30 completely isolates the construction area from the traffic lane 14, ensuring the normal passage of vehicles below and the absolute safety of workers above.

[0033] In one embodiment of this application, when the aforementioned maintenance operation involves the installation of corrugated steel sheets, the specific operational process is as follows: First, the pre-assembled corrugated steel sheets outside the tunnel are transported longitudinally along the tunnel to the underside of the installation trolley by a matching transport shield trolley. Then, the corrugated steel sheet lifting / translation system on the installation trolley smoothly transfers the corrugated steel sheets from the transport trolley via a translation trolley. Next, the lifting cylinder drives the lifting arc beam to lift the corrugated steel sheets gradually to the designed installation height. During this process, the lifting speed must be controlled to ensure that the corrugated steel sheets remain stable and do not deflect or slip. Finally, the translation cylinder drives the translation trolley to precisely align the corrugated steel sheets with the predetermined installation positions on the tunnel lining in both the transverse and longitudinal directions, completing the positioning and fixing of the corrugated steel sheets. Through the organic connection of the above steps, mechanized and high-precision installation of large-size corrugated steel sheets can be achieved, significantly reducing the labor intensity of manual handling and adjustment, and improving installation quality and construction efficiency.

[0034] In one embodiment of this application, after the single-hole operation is completed, the trolley needs to be moved to the next work area. The specific operation is as follows: First, the lifting cylinder 51 of the lifting and translating system 50 retracts, causing the translating support 54 to lift off the ground and the driving wheels 40 and driven wheels 41 to re-land. Then, the traveling system is activated to slowly move the trolley longitudinally along the tunnel to the next work position. After the trolley reaches the new position, the above positioning and support steps, as well as the top operation steps, are repeated, in a cyclical manner until all maintenance work is completed. After each work cycle, the operator should check whether the connecting bolts are loose and whether the pins are reliable, and address any problems immediately. Special attention should be paid to prevent deviation during each trolley movement. If deviation is detected, the translating cylinder 55 and the hook plate in the lifting and translating system 50 can be used to adjust the trolley laterally to the tunnel centerline. Through the above cyclical operation process, the trolley can achieve rapid transfer and continuous operation within the tunnel, significantly improving the organizational efficiency and standardization level of maintenance construction.

[0035] During implementation, the operating environment for the trolley is as follows: ambient air temperature range -10℃ to +40℃, and the levels of dust, acid, corrosive gases, or substances in the surrounding air must not exceed normal limits. Designated personnel must be responsible for operation and must be trained and qualified before being allowed to work. The anti-wear hydraulic oil level in the hydraulic station must be checked daily; if insufficient, it should be replenished promptly. The control circuit must be checked regularly to ensure it is functioning properly. The tire travel mechanism must be strictly maintained; the tires should only contact the ground during trolley movement. During normal construction work, the tires must be lifted off the ground, with the front and rear outriggers supporting the ground. This is to prevent the tire rubber from aging and losing elasticity.

[0036] In summary, the shield trolley and its construction method provided by this invention, through its innovative "bottom-through, top-operation" structure, modular design, and highly integrated operation, protection, movement, early warning, and power systems, combined with a complete construction process including pre-movement preparation, movement positioning, positioning support, top operation, trolley relocation, and cyclical operation, effectively solves the core contradiction between safety and traffic flow in the maintenance and construction of operating highway tunnels. It can safely, efficiently, and with high quality complete the full-section maintenance of tunnels without interrupting traffic, and has extremely high practical value and promising prospects for promotion.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shield trolley suitable for uninterrupted traffic maintenance and construction on operating highways, characterized in that, include: A portal truss main body (10) is formed vertically in sequence as a bottom passage layer (11), a middle load-bearing layer (12) and a top working layer (13). The bottom passage layer (11) is configured as a vehicle passage (14) that allows vehicles to pass through. The top working layer (13) is equipped with a multi-functional working platform (15) that can be raised, lowered and extended. The walking system is installed at the bottom of the portal truss body (10) and is used to drive the shield trolley to move; The protective system is installed on the main body of the portal truss (10) to form a physical isolation between the construction area and the traffic area in the middle load-bearing layer (12); The power system is installed on the main body (10) of the portal truss and is used to provide power for the walking system and maintenance equipment.

2. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, The walking system includes: The drive wheel (40) includes a wheel box, a solid rubber wheel, a wheel hub, a wheel axle, a tapered roller bearing, a sprocket, a chain, and a motor reducer; The driven wheel (41) includes a wheel box, a solid rubber wheel, a wheel hub, a wheel axle, and a tapered roller bearing; The lifting and translating system (50) includes a lifting cylinder (51), a lifting telescopic rod (52), a translating slide plate (53), a hook plate that cooperates with the translating slide plate (53), a translating cylinder (55), and a translating trestle (54). The lifting and translating system (50) is used to lift the driving wheels (40) and the driven wheels (41) off the ground or lower them to contact the ground.

3. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, The protection system includes: The steel shield (30) is formed by fully enclosing the portal frame beam (21) and the inner side of the portal frame column (22) of the portal truss body (10) with steel plates; A rockfall protection structure (31) is installed on the top working layer (13). A fall arresting guardrail (32) for high-altitude operations is installed at the edge of the top working layer (13); An emergency escape passage (33) is set on the main body of the portal truss (10).

4. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, It also includes an intelligent early warning system, which includes a rotating buzzer alarm light, an LED light strip, and an LED advertising screen. The rotating buzzer alarm light is synchronized with the walking system. When the walking system is started, the rotating buzzer alarm light emits an audible and visual alarm.

5. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, The power system includes a diesel generator set, a mains power access unit, and an automatic transfer switch. The automatic transfer switch is used to switch between the diesel generator set and the mains power access unit to provide uninterrupted power.

6. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, The shield trolley is a shield installation trolley, and its top working layer (13) is integrated with a corrugated steel plate lifting / translation system. The corrugated steel plate lifting / translation system includes a translation bottom beam, a translation trolley, a translation trolley, a lifting cylinder, a translation cylinder and a lifting arc beam.

7. The shield trolley for uninterrupted traffic maintenance on operating highways as described in claim 1, characterized in that, The main body of the portal truss (10) adopts a modular splicing structure, with a total length ranging from 6 meters to 24 meters and a total width ranging from 4 meters to 12 meters. The main structure is made of Q355B high-strength steel.

8. A method for uninterrupted traffic maintenance construction on high-speed roads using the shield trolley described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1, Preparations before the trolley moves: Check whether the lifting cylinder (51) of the lifting and translating system (50) has been fully retracted so that the translating trolley (54) is off the ground, the driving wheels (40) and the driven wheels (41) are on the ground, retract the side platform, clean the ground and the items around the trolley, and organize the cables. Step 2, Trolley travel and positioning: Start the travel system and drive the shield trolley to move longitudinally along the tunnel to the predetermined working position. During the travel, warnings are given by rotating buzzer alarm lights and alarm sounds. Step 3, Trolley positioning and support: By extending the lifting cylinder (51) of the lifting and translation system (50), the driving wheels (40) and the driven wheels (41) are lifted off the ground, so that the translation trolley (54) is grounded and supported. The trolley is then laterally adjusted to the center line position of the tunnel by the translation cylinder (55) in conjunction with the translation slide plate (53) and the hook plate. Step 4, Top Operation: The tunnel full-section maintenance operation is carried out on the multi-functional work platform (15) of the top work layer (13). During the operation, the construction area is completely isolated from the traffic lane (14) by the steel shield (30).

9. The method for uninterrupted traffic maintenance on operational expressways according to claim 8, characterized in that, In step four, the maintenance work is the installation of corrugated steel sheets, including: The corrugated steel sheets are connected to the transport trolley using a corrugated steel sheet lifting / translation system. The corrugated steel plate is lifted to the designed installation height by driving the lifting arc beam with a lifting cylinder; The steel corrugated sheet is adjusted laterally and longitudinally to the predetermined installation position by driving the translation trailer with the translation cylinder, thus completing the installation.

10. The method for uninterrupted traffic maintenance on operational expressways according to claim 8, characterized in that, Following step four, the following is also included: Step 5, trolley relocation: by retracting the lifting cylinder (51) of the lifting and translating system (50), the translating trolley (54) is lifted off the ground, the driving wheels (40) and driven wheels (41) are brought to the ground, and the walking system is started to move the trolley to the next working position; Step six: Repeat steps three through five until all maintenance work is completed.

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