Large-diameter tmb rear matching bridge system and construction method and assembling method

Abstract

The application provides a large-diameter TBM rear matching bridge system and a construction method and an assembling method, a supporting surface of a walking supporting module is matched with a bottom surface of a previous bridge and a subsequent bridge, and is used as a walking foundation of the previous bridge; a connecting bridge module is arranged between the subsequent bridge and a rear matching trolley, and is used to provide an assembling working space of an inverted arch member. The walking supporting module is used as a walking sleeper of the TBM bridge, the transporting process does not occupy the internal space of the bridge, and the defects that the traditional inverted arch block occupies the space of the bridge seriously due to the large volume and causes the belt conveyor and pipelines to be difficult to arrange are overcome; the independent connecting bridge module is arranged between the bridge and the rear matching trolley, the assembling position of the inverted arch member is moved from the crowded front part to the special area at the rear part, and the technical problem that the inverted arch block cannot be assembled at the front part due to the large size in the large-diameter tunnel is fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of tunnel boring construction, specifically to a large-diameter open-type TBM and its construction method. Background Technology

[0002] With the continuous development of underground engineering technology, especially in the fields of transportation, water conservancy and municipal construction, the cross-sectional diameter of tunnels is showing a continuous increasing trend. In order to adapt to this development demand, large-diameter open-face TBMs (tunnel boring machines) are increasingly being used in the construction of various long tunnels.

[0003] In existing open-face TBM construction technology, the cable tray system supporting the equipment typically uses wheelsets to travel on pre-laid invert blocks. Invert blocks are part of the tunnel lining, specifically referring to precast concrete components laid at the tunnel floor in an arc shape (matching the shape of the tunnel floor). For tunnels of conventional diameter, the invert blocks are relatively small and can be assembled in the No. 1 cable tray area at the front of the equipment. This traditional construction method is technologically mature and can meet the construction needs of tunnels with typical cross-sections.

[0004] However, as the tunnel diameter increases significantly, the size of the corresponding invert arch blocks must also increase accordingly. If the traditional construction method of assembling large invert arch blocks at the front of the bridge frame is still used, a series of new technical problems and construction difficulties will inevitably arise: First, the limited internal space of the equipment leads to functional conflicts. A new inverted arch block enters the cable tray from the rear and is transported to the lower front of the cable tray (i.e., the No. 1 cable tray area). The large inverted arch block will severely encroach on the already limited space inside the No. 1 cable tray during the transportation from the rear to the front assembly area. This not only makes the layout of key equipment such as the conveyor belt for slag removal and the lifting platform for material transfer extremely difficult, but may also obstruct the routing of pipelines such as ventilation pipes, cables, and hydraulic lines, affecting the integrity of equipment functions and the reliability of operation.

[0005] Secondly, there are safety hazards in the construction work. The front area of ​​the No. 1 bridge frame is adjacent to the TBM main unit and is the area with the most frequent operations and the most dense personnel activity, such as slag removal, anchor bolt support, and steel arch frame installation. Transporting and assembling the large inverted arch blocks, which significantly increase in volume and weight, to this area leads to overlapping material transportation and personnel operations, greatly increasing the risk of accidents such as falling objects and mechanical injuries, posing a serious threat to the lives of construction workers.

[0006] Therefore, how to optimize the layout of the rear-mounted cable trays of large-diameter open TBMs to solve the spatial conflicts and safety hazards caused by the increased size of the inverted arch blocks has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] Purpose of the invention: The purpose of this invention is to address the shortcomings of existing technologies by providing a large-diameter TBM rear-mounted cable tray system and its construction and assembly methods, thereby solving the two major problems of spatial conflicts and safety hazards in the construction of large-diameter open TBMs.

[0008] Technical solution: The present invention provides a large-diameter TBM rear-mounted cable tray system, comprising an inverted arch component, a preceding cable tray and a following cable tray sequentially connected to the rear end of the main unit, and further comprising: The traveling support module is transported to the front end of the preceding cable tray and laid at the bottom of the tunnel by the first hoisting equipment under the preceding and following cable trays. The support surface of the traveling support module is adapted to the bottom surface of the preceding and following cable trays and is used as the traveling foundation of the preceding cable tray. A connecting bridge module is provided, which is located between the subsequent bridge and the subsequent matching trolley, and is used to provide an assembly work space for the invert arch components. The connecting bridge module is equipped with a second hoisting device for lifting the invert arch components.

[0009] In one feasible approach, the traveling support module is constructed as a detachable and movably connected segmented structure, with the tail section at the rear end being lifted to the front end by a first hoisting device and connected to the head section.

[0010] In one feasible approach, the walking support module is constructed as a plate-like component, using steel structural components or precast reinforced concrete components.

[0011] In one possible approach, the connecting cable tray module is constructed as an independent cable tray structure.

[0012] The construction method of a cable tray system based on a large-diameter TBM as described in this invention includes the following steps: Step S101: Remove the traveling support module located at the rear end of the subsequent cable tray; Step S102: The dismantled traveling support module is lifted by the first hoisting equipment and transported forward from the dismantling position through the internal space of the subsequent cable tray and the preceding cable tray to the laying position at the front end of the preceding cable tray. Step S103: Place and lay the walking support module at the location to be laid, so that it becomes the walking foundation of the preceding cable tray, so that the preceding and subsequent cable trays can continue to move forward.

[0013] Step S104: As the large-diameter TBM continues to advance, repeat steps S101-S103.

[0014] In one feasible approach, in step S102, after the first hoisting equipment lifts the traveling support module, it also rotates the traveling support module by a preset angle so that the traveling support module can smoothly pass through the internal space of the preceding and following cable trays.

[0015] In one feasible approach, in step S103, the walking support module is rotated back to its initial position before laying the walking support module.

[0016] The present invention discloses an assembly method for a large-diameter TBM-based cable tray system, comprising the following steps: Step S201: The transport vehicle transports the invert arch components forward along the invert arch road surface that has been laid at the bottom of the tunnel, and arrives at the front area of ​​the supporting trolley. Step S202: The inverted arch component located in the front area of ​​the rear supporting trolley is lifted from the transport vehicle by the second lifting equipment on the connecting bridge module; Step S203: The lifted arch component is transported forward to the predetermined assembly position below the connecting bridge module using the second hoisting equipment; Step S204: Lower and adjust the posture of the invert arch component at the predetermined assembly position, and assemble it with the invert arch block that has been laid behind it.

[0017] Step S205: As the large-diameter TBM continues to advance, repeat steps S201-S204.

[0018] In one feasible approach, in step S201, after the inverted arch component is transported to the front area of ​​the rear supporting trolley, the posture of the inverted arch component is pre-adjusted, including rotating the inverted arch component by a preset angle using a transport vehicle so that the arc surface of the inverted arch component faces the preceding bridge frame and the plane faces away from the preceding bridge frame.

[0019] In one feasible approach, step S204, adjusting the posture of the inverted arch block includes lowering the inverted arch component using a second hoisting device until the arc-shaped surface of the inverted arch component fits against the bottom surface of the tunnel.

[0020] Beneficial effects: 1. The present invention uses a traveling support module as the traveling sleeper of the TBM bridge. Its transportation process does not occupy the internal space of the bridge, overcoming the disadvantages of traditional inverted arch blocks, which occupy bridge space due to their huge size and make it difficult to arrange belt conveyors and pipelines. At the same time, the traveling support module has a much lower requirement for the flatness of the rock surface at the bottom of the tunnel than traditional inverted arch blocks. It can be laid quickly without complicated rock surface treatment, which significantly improves the assembly efficiency.

[0021] 2. This invention sets up an independent connecting bridge module between the bridge and the rear supporting trolley, moving the assembly position of the invert arch components from the crowded front to a dedicated rear area, fundamentally solving the technical problem that the invert arch blocks cannot be assembled at the front due to their huge size in large-diameter tunnels; this layout allows the invert arch block assembly to not interfere with the front excavation operation, enabling parallel processes and significantly improving overall construction efficiency. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the preceding cable tray, the following cable tray, and the traveling support module; Figure 2 This is a structural diagram showing the connection between the cable tray module and the invert arch component; it can be understood that... Figure 2 The architecture connects to Figure 1 The backend of the architecture; Figure 3 A schematic diagram of the tunnel cross-section where the walking support module is located; Figure 4 This is a schematic diagram of the tunnel cross-section where the first hoisting equipment is located at a certain point on either the preceding or following cable tray. Figure 5 This is a schematic diagram of the tunnel cross-section at the connection point of the cable tray module. Detailed Implementation

[0023] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0025] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] With the continuous development of underground engineering, the cross-sectional diameter of tunnels is constantly increasing, and more and more large-diameter open-face TBMs (tunnel boring machines) are being used in tunnel construction.

[0027] An open-face TBM mainly consists of two parts: the main machine and the supporting systems. The main machine, located at the front, is responsible for excavation, support, and propulsion at the working face. The supporting systems follow behind the main machine, consisting of multiple sections of cable trays and trolleys, carrying auxiliary equipment such as muck removal, ventilation, power supply, and water supply. The cable trays form the skeleton of the supporting systems, typically truss or box-beam metal components, including multiple sections such as Cable Tray 1 and Cable Tray 2. The cable trays move forward with the main machine via a traveling mechanism on the laid invert blocks. Simultaneously, belt conveyors, hydraulic stations, pipelines, and other equipment are installed on the cable trays, which also serve as the main passageways for personnel and materials.

[0028] An invert block is a precast concrete component laid at the bottom of a tunnel, typically in an arc shape to conform to the tunnel cross-section. Its core functions include: bearing the ground pressure as part of the tunnel's permanent structure (permanent lining); providing a smooth and continuous track for subsequent bridge supports (travel foundation); and integrating functions such as pre-reserved drainage ditches and track installation slots during prefabrication. In large-diameter tunnels, invert blocks often take the form of monolithic box culverts, i.e., large, hollow, monolithically precast concrete components that function as both an invert and part of the sidewall.

[0029] In conventional open-type TBM construction, the invert blocks are relatively small and can be assembled in the front area of ​​the No. 1 bridge frame. The specific process is as follows: the invert blocks are transported from the rear by transport vehicles, pass through the interior of the bridge frame, and are hoisted into place by equipment at the front of the No. 1 bridge frame, laid on the newly excavated rock surface behind the main unit. The bridge frame then travels on the newly laid invert blocks.

[0030] However, when the tunnel diameter increases, leading to a significant increase in the size of the invert arch blocks, the traditional process described above will generate a series of technical problems. On the one hand, the large invert arch blocks will severely encroach on the internal space of the bridge frame during transportation to the front of the No. 1 bridge frame, making it difficult to arrange components and pipelines such as belt conveyors and lifting platforms, resulting in functional conflicts. On the other hand, the area in front of the No. 1 bridge frame is the area with the most frequent operations such as slag removal and anchor bolt support, and the most dense personnel activity. Assembling the large invert arch blocks here will lead to cross-operation between humans and machines, greatly increasing the risk of safety accidents such as falling objects and mechanical injuries.

[0031] Therefore, how to optimize the rear-mounted layout of large-diameter open TBMs to solve the spatial conflicts and safety hazards caused by the increased size of the inverted arch blocks has become a technical problem that urgently needs to be solved by those skilled in the art.

[0032] Based on this, the present invention first proposes a cable tray system for large-diameter TBMs, such as... Figure 1-5 As shown, it includes an inverted arch member 100, a front cable tray 200 and a rear cable tray 300 sequentially connected to the rear end of the main unit.

[0033] Generally, the preceding cable tray 200 and the following cable tray 300 are located at the rear of the main unit and connected sequentially along the tunnel, typically in the form of a truss or box girder structure. The bottom of the preceding cable tray 200 and the following cable tray 300 is usually equipped with a first lifting device 500 (such as a crane or mobile crane) for lifting and forward transport. The first lifting device 500 can move along the extension direction of the cable tray, and its working range covers the area below the preceding cable tray 200 and the following cable tray 300.

[0034] The invert arch component 100 is generally constructed as an invert arch block, which, after being assembled at a predetermined position, forms a continuous permanent lining structure at the bottom of the tunnel. Since the invert arch block is part of the tunnel lining, its bottom is arc-shaped to match the shape of the tunnel bottom.

[0035] In addition to the above-described structure, the large-diameter TBM rear-mounted cable tray system of the present invention also includes a traveling support module 400 and a connecting cable tray module 600. The supporting surface of the traveling support module 400 is adapted to the bottom surfaces of the preceding cable tray 200 and the following cable tray 300, and is transported to the front end of the preceding cable tray 200 and laid at the bottom of the tunnel by the first hoisting equipment 500 on the preceding cable tray 200 and the following cable tray 300, serving as the traveling foundation for the preceding cable tray 200; the connecting cable tray module 600 is disposed between the following cable tray 300 and the rear-mounted trolley 700, providing assembly workspace for the invert arch component 100, and the connecting cable tray module 600 is equipped with a second hoisting equipment 800 for lifting the invert arch component 100.

[0036] Based on the above system, on the one hand, the traveling support module 400 can be continuously laid on the bottom rock surface at the front end along the tunnel, providing temporary traveling sleepers for the preceding bridge 200 and the following bridge 300. The bottoms of the preceding bridge 200 and the following bridge 300 travel on the traveling support module 400, enabling the entire supporting system to move forward with the TBM main engine's excavation. The traveling support module 400 can replace the original invert arch block. The support surface of the traveling support module 400 only needs to match the size of the bottom surface of the preceding bridge 200 and the following bridge 300, and its size does not need to be too large. As the traveling foundation of the bridge, it can be easily transported and circulated inside the bridge at any time without occupying the space for the installation of belt conveyors and pipelines.

[0037] On the other hand, a separate connecting bridge module 600 is specially set up between the subsequent bridge 300 and the subsequent supporting trolley 700, changing the assembly position of the invert arch component 100 from the crowded front of the preceding bridge 200 to the area of ​​the connecting bridge module 600 at the rear. The huge invert arch component 100 is assembled in a special area, away from the densely populated slag removal and support operation area, realizing the separation of man and machine, and completely eliminating the safety threat to the front-end workers.

[0038] To further simplify the structure of the traveling support module 400 and optimize construction, the traveling support module 400 is constructed as a detachable and movably connected segmented structure. The tail section, located at the rear end, is lifted to the front end by the first hoisting equipment 500 and connected to the head section. It can be imagined that as the main engine advances through the tunnel, the traveling support module can cyclically disassemble its tail section and connect it to the head section. Therefore, by equipping only a certain number of traveling support module 400 segmented structures, they can be continuously circulated and reused to meet the tunneling needs of the entire tunnel. With this configuration, the number and arrangement of the traveling support module 400 segmented structures can be flexibly adjusted according to site conditions, improving the flexibility of construction organization and enhancing adaptability to complex working conditions.

[0039] For example, the walking support module 400 is constructed as a plate-like component, using steel structural parts or precast reinforced concrete components. With this construction, the walking support module 400 exhibits high strength, light weight, and ease of hoisting; it also demonstrates good adaptability to rock surfaces, eliminating the need for complex rock surface preparation procedures, and exhibits good stability after installation. After the first hoisting equipment 500 transports the plate-like component to the front, it can be directly lowered into place, significantly reducing the cycle time for waiting for rock surface preparation and laying the walking foundation, thus improving assembly efficiency.

[0040] In some examples, the connecting cable tray module 600 is constructed as an independent cable tray structure, such as a metal truss, to provide a transfer channel for the invert arch component 100. Therefore, the invert arch block assembly area is moved back to avoid the dense work area in front, realizing the separation of man and machine. By hoisting in the air, the conflict of ground space is avoided, and the tunneling and lining are carried out in parallel.

[0041] Based on the aforementioned large-diameter TBM rear-mounted cable tray system, this invention also provides a construction method, specifically a construction method for the traveling support module 400, comprising the following steps: Step S101: Removal Step. Remove the traveling support module 400 located at the rear end of the subsequent cable tray 300.

[0042] Specifically, when the walking support module 400 is constructed as a segmented structure, the rear tail section is disassembled in this step.

[0043] Step S102, hoisting step: The dismantled walking support module 40 is lifted by the first hoisting equipment 500 and transported forward from the dismantling position through the internal space of the subsequent cable tray 300 and the preceding cable tray 200 to the laying position at the front end of the preceding cable tray 200.

[0044] In step S102, after the first hoisting equipment 500 lifts the traveling support module 400, it will also rotate the traveling support module 400 by a preset angle so that the traveling support module 400 can smoothly pass through the internal space of the preceding cable tray 200 and the following cable tray 300.

[0045] For example, the preset angle mentioned here is set to 90°. After rotation, its length direction can be changed so that it changes from being perpendicular to the tunnel axis to being parallel to the tunnel axis, thereby reducing the lateral width and facilitating smooth passage through the narrow internal space of the cable tray, avoiding interference with equipment such as belt conveyors and pipelines inside the cable tray.

[0046] Step S103, Laying Step: Place and lay the walking support module 400 at the location to be laid, so that it becomes the walking foundation of the preceding cable tray 200, so that the preceding cable tray 200 and the following cable tray 300 can continue to move forward.

[0047] In step S103, based on the fact that the first hoisting equipment 500 rotated the traveling support module 400 by a preset angle after lifting it in step S102, the traveling support module 400 is rotated back to its initial position before being laid. If the preset angle of rotation in step S102 is 90°, this step requires it to be rotated 90° in the opposite direction to restore its initial position, thereby facilitating the completion of the assembly operation.

[0048] Step S104: As the large-diameter TBM continues to advance, repeat steps S101-S103.

[0049] In the construction method of this invention, since the front part of the preceding bridge 200 no longer requires the transportation and assembly of the inverted arch blocks, a large amount of free space can be reserved for front-end operations such as slag removal and support. Based on this spatial advantage, the cyclical assembly of the traveling support module 400 can be flexibly arranged within one tunneling stroke of the TBM, according to the actual progress and rhythm of the front-end slag removal and support operations. Specifically, when slag removal or support operations occupy part of the time or space, operators can choose to simultaneously dismantle, transport, and lay the traveling support module 400 at a location outside the work area or during work breaks. This dynamic adjustment capability based on actual working conditions achieves a high degree of coordination between the front-end main operations and the laying of the lower traveling foundation, avoiding mutual waiting and interference between processes, and significantly improving the overall efficiency of the tunneling cycle.

[0050] Based on the aforementioned large-diameter TBM rear-mounted cable tray system, this invention also provides an assembly method, specifically an assembly method for the invert arch component 100, comprising the following steps: Step S201, Transportation Step: The transportation vehicle transports the invert arch component 100 forward along the invert arch road surface that has been laid at the bottom of the tunnel, and arrives at the front area of ​​the supporting trolley 700. In some examples, there are no restrictions on the means of transport; any vehicle that facilitates transportation can be used, such as a trackless double-headed vehicle commonly used in tunnel boring. Once in place, the transport vehicle is lowered, and its outriggers are deployed to increase vehicle stability.

[0051] In step S201, after the invert arch component 100 is transported to the front area of ​​the rear supporting trolley 700 (generally the front of the first trolley), the posture of the invert arch component 100 is pre-adjusted according to the hoisting requirements. This includes rotating the invert arch component 100 by a preset angle using a transport vehicle, so that the curved surface of the invert arch component 100 faces the preceding bridge frame 200, and the plane faces away from the preceding bridge frame 200. This pre-adjustment ensures that the curved surface of the invert arch block faces the excavation direction, facilitating the connection of the lifting equipment and aerial transport. It also reduces the lateral dimension to allow for smooth passage through the internal space of the bridge frame, and makes the posture change smoother during subsequent turning and lowering, thus improving assembly efficiency.

[0052] Step S202, hoisting step: The arch component 100 located in the front area of ​​the rear supporting trolley is hoisted from the transport vehicle by the second hoisting equipment 800 on the connecting bridge module 600.

[0053] In step S202, when lifting and connecting the invert arch component 100, an L-shaped lifting device is used as the connecting component. The L-shaped lifting device has a simple structure and reliable connection, and can adapt to the internal spatial shape of the invert arch block, ensuring the stability and safety of the lifting process.

[0054] The L-shaped lifting device can be inserted from the side into the pre-set lifting hole or slot inside the inverted arch block to make the lifting device and the inverted arch block reliably fit together; the second lifting device, the 800 lifting lifting device, lifts the inverted arch block vertically from the transport vehicle to a certain height, so that the inverted arch block is completely separated from the transport vehicle; after confirming separation, the transport vehicle drives away from the unloading area to complete the unloading operation.

[0055] Step S203, transfer step: The lifted arch component 100 is transported forward to the predetermined assembly position below the connecting bridge module 600 by the second hoisting equipment; For example, the predetermined assembly position is set at the middle of the connecting cable tray module 600. On the one hand, the middle area of ​​the connecting cable tray module 600 has sufficient working space to meet the operating space required for the invert arch component 100 to adjust its posture during assembly, ensuring smooth posture adjustment; on the other hand, the area below the front of the connecting cable tray module 600 is the slag removal area. If assembly is carried out here, the residual slag at the bottom will affect the flatness of the invert arch component and may even lead to assembly deviation. Therefore, setting the predetermined assembly position at the middle of the connecting cable tray module 600 provides sufficient space for the posture adjustment of the invert arch component 100 while avoiding the front slag removal area, ensuring the cleanliness and flatness of the bottom of the assembly, thereby ensuring assembly accuracy and quality.

[0056] Step S204, Assembly Step: Lower and adjust the posture of the inverted arch component 100 at the predetermined assembly position, and assemble it with the inverted arch component 100 that has been laid behind it.

[0057] In step S204, adjusting the posture of the inverted arch block includes lowering the inverted arch component 100 using the second hoisting equipment 800 until the arc surface fits against the bottom of the tunnel.

[0058] After reaching the designated assembly position, the lowering and attitude adjustment of the invert arch component 100 begins. Specifically, the second hoisting equipment 800 slowly lowers the wire rope, causing the invert arch block to gradually descend. If step S201 pre-adjusted the attitude of the invert arch component 100, then during the lowering process, the invert arch block is slowly rotated around its horizontal axis by controlling the raising and lowering of the wire rope, gradually rotating its arc-shaped surface from facing the excavation direction to facing the tunnel bottom, forming a continuous attitude with the already laid invert arch block, such as... Figure 2 , 5 As shown. When the block is lowered to an appropriate height above the paving surface, precise alignment is performed, and then the lowering continues until the invert block is stably positioned in the paving location, completing the lowering operation. During this process, the lifting and rotation of the wire rope are controlled in a coordinated manner to ensure smooth attitude transitions and precise alignment of the invert block.

[0059] Step S205: As the large-diameter TBM continues to excavate, after assembly, the second hoisting equipment 800 is reset, and steps S201-S204 are repeated for the next invert arch component 100.

[0060] Specifically, after each invert arch block is assembled, the second hoisting equipment 800 is reset, and steps S201-S204 can be repeated for the next invert arch block. In this invention, while the preceding bridge frame 200 area performs excavation, slag removal, and support operations, the rear connecting bridge frame module 600 area can simultaneously assemble the invert arch component 100. The two processes are independent of each other, changing the traditional alternating pattern of excavation waiting for lining and lining interfering with excavation, achieving true continuous operation, and significantly improving overall construction efficiency.

[0061] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A large-diameter TBM rear-mounted cable tray system, comprising an inverted arch member, a preceding cable tray, and a following cable tray sequentially connected to the rear end of the main unit, characterized in that, Also includes: The traveling support module is transported to the front end of the preceding cable tray and laid at the bottom of the tunnel by the first hoisting equipment under the preceding and following cable trays. The support surface of the traveling support module is adapted to the bottom surface of the preceding and following cable trays and is used as the traveling foundation of the preceding cable tray. A connecting bridge module is provided, which is located between the subsequent bridge and the subsequent matching trolley, and is used to provide an assembly work space for the invert arch components. The connecting bridge module is equipped with a second hoisting device for lifting the invert arch components.

2. The large-diameter TBM rear-mounted cable tray system according to claim 1, characterized in that, The traveling support module is constructed as a detachable and movably connected segmented structure. The tail section at the rear end is lifted to the front end by the first hoisting equipment and connected to the head section.

3. The large-diameter TBM rear-mounted cable tray system according to claim 1, characterized in that, The walking support module is constructed as a plate-shaped component, using steel structural components or precast reinforced concrete components.

4. The large-diameter TBM rear-mounted cable tray system according to claim 1, characterized in that, The connecting cable tray module is constructed as an independent cable tray structure.

5. A construction method based on a large-diameter TBM and its supporting cable tray system, characterized in that, Includes the following steps: Step S101: Remove the traveling support module located at the rear end of the subsequent cable tray; Step S102: The dismantled traveling support module is lifted by the first hoisting equipment and transported forward from the dismantling position through the internal space of the subsequent cable tray and the preceding cable tray to the laying position at the front end of the preceding cable tray. Step S103: Place and lay the walking support module at the location to be laid, so that it becomes the walking foundation of the preceding cable tray, so that the preceding and subsequent cable trays can continue to move forward. Step S104: As the large-diameter TBM continues to advance, repeat steps S101-S103.

6. The construction method based on a large-diameter TBM and its supporting cable tray system according to claim 5, characterized in that, In step S102, after the first hoisting equipment lifts the traveling support module, it will also rotate the traveling support module by a preset angle so that the traveling support module can smoothly pass through the internal space of the preceding and following cable trays.

7. The construction method based on a large-diameter TBM and its supporting cable tray system according to claim 6, characterized in that, In step S103, before laying the walking support module, the walking support module is rotated back to its initial position.

8. An assembly method for a cable tray system based on a large-diameter TBM, characterized in that, Includes the following steps: Step S201: The transport vehicle transports the invert arch components forward along the invert arch road surface that has been laid at the bottom of the tunnel, and arrives at the front area of ​​the supporting trolley. Step S202: The inverted arch component located in the front area of ​​the rear supporting trolley is lifted from the transport vehicle by the second lifting equipment on the connecting bridge module; Step S203: The lifted arch component is transported forward to the predetermined assembly position below the connecting bridge module using the second hoisting equipment; Step S204: Lower and adjust the posture of the invert arch component at the predetermined assembly position, and assemble it with the invert arch block that has been laid behind it. Step S205: As the large-diameter TBM continues to advance, repeat steps S201-S204.

9. The assembly method for a large-diameter TBM-based cable tray system according to claim 8, characterized in that, In step S201, after the inverted arch component is transported to the front area of ​​the rear supporting trolley, the posture of the inverted arch component is pre-adjusted, including rotating the inverted arch component by a preset angle using a transport vehicle so that the arc surface of the inverted arch component faces the preceding bridge frame and the plane faces away from the preceding bridge frame.

10. The assembly method for a large-diameter TBM-based cable tray system according to claim 8 or 9, characterized in that, In step S204, adjusting the posture of the inverted arch block includes lowering the inverted arch component using a second hoisting device until the arc-shaped surface of the inverted arch component fits against the bottom surface of the tunnel.

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