Slurry pipe extension system and method for split-type launch of slurry shield machine

Abstract

A slurry pipe extension system and method for split-type launch of a slurry shield machine. The slurry pipe extension system comprises slurry pipe slide rails (7) arranged on a shield launching area side wall (6), and a slurry inlet pipe supporting platform (4) and a slurry return pipe supporting platform (5) which are located on the ground; a slurry inlet pipe (2) and a slurry return pipe (3) each comprise a telescopic hose section, a fixed section connected to the tail end of a shield trolley, and a vertical supporting section connected to the telescopic hose section and the fixed section; the telescopic hose section of the slurry inlet pipe (2) is slidably arranged on the slurry inlet pipe supporting platform (4); the telescopic hose section of the slurry return pipe (3) is slidably arranged on the slurry return pipe supporting platform (5); the slurry pipe slide rails (7) are parallel to the traveling direction of the shield machine; and the vertical supporting sections of the slurry inlet pipe (2) and the slurry return pipe (3) are both slidably connected to the slurry pipe slide rails (7) by means of sliding mechanisms (8). In the present application, the whole pipe extension process is simple and convenient, a matching pipe extension device is not required, and compared with conventional pipe extension devices, the system saves construction space, and is applicable to situations with confined space where no pipe extension device mounting space is available.

Description

A slurry shield tunneling split-type slurry pipe replacement system and method Technical Field

[0001] This invention relates to the field of slurry shield tunneling, and in particular to a slurry shield tunneling split-type slurry pipe replacement system and method. Background Technology

[0002] A slurry shield tunneling machine (SMT) pumps slurry of a certain concentration into its slurry chamber. As excavated soil and groundwater flow from the cutterhead into the excavation channel, the slurry concentration and pressure within the chamber gradually increase, balancing with the soil and water pressure at the excavation face. This forms a mud film or a permeable wall created by the slurry pressure, stabilizing the excavation. A slurry loop is formed through inlet and outlet pipes. The slurry carries the excavated soil through the outlet pipe to a slurry separation station, where dry excavated material is separated, allowing the tunneling to continue in a continuous cycle. Continuous tunneling is achieved by extending the slurry pipeline.

[0003] The separate launching of large-diameter shield tunneling machines (TBMs) is a technical challenge in TBM construction, especially under space-constrained conditions. How to launch the TBM in separate sections and reassemble it inside the tunnel becomes a critical issue. For the separate launching process of large-diameter slurry shield TBMs, in addition to considering the assembly and hoisting of the TBM, the extension process of the slurry pipe is a key consideration. Existing slurry shield TBMs extend the slurry pipe by pre-installing a sufficiently long flexible hose on the top of the trolley to allow the slurry inlet and outlet pipes to move forward, keeping the trolley position relatively unchanged. The pipe replacement operation is completed by moving the pipe-changing device's traveling frame. However, since the pipe-changing device is generally located at the rear of the last trolley section, in some launching shafts with limited space where the trolley cannot be fully lowered for separate launching, the pipe replacement process cannot be carried out underground. Furthermore, conventional slurry pipe-changing devices occupy a large space and are complex to operate, making it impossible to install ring pipe devices in confined spaces. Therefore, how to achieve the telescopic replacement of large-diameter, high-strength slurry pipes during TBM forward excavation is a prerequisite for the successful implementation of separate launching. To address the aforementioned problems, this invention presents a slurry-pipe-changing system for split-type slurry-launching tunnel boring machines. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a slurry pipe replacement system and method for the separate launching of a slurry shield tunnel. This ring pipe system enables the expansion and contraction of slurry pipes within confined spaces, ensuring the normal launch of a large-diameter slurry shield tunnel.

[0005] To achieve the above-mentioned technical objectives, this invention provides a mud pipe replacement system for the separate launching of a slurry shield tunneling machine, used for mud circulation during the separate launching of the shield. It includes a mud station located on the ground and a shield trolley located inside the launching shaft. The mud station and the shield trolley are circulatedly connected via an inlet pipe and a return pipe. The mud pipe replacement telescopic system includes a mud pipe sliding track installed on the side wall of the shield launching area, an inlet pipe support platform located on the ground, and a return pipe support platform. Both the inlet pipe and the return pipe include a telescopic flexible hose section located on the ground, a fixed section connected to the rear end of the shield trolley, and... A vertical support section connects the telescopic flexible hose section and the fixed section. The telescopic flexible hose section of the grout inlet pipe is slidably placed on the grout inlet pipe support platform, and the telescopic flexible hose section of the grout return pipe is slidably placed on the grout return pipe support platform. The sliding track of the mud pipe is parallel to the traveling direction of the tunnel boring machine. The vertical support sections of the grout inlet pipe and the grout return pipe are slidably connected to the sliding track of the mud pipe through a sliding mechanism. The sliding mechanism includes a pipe support and a traveling pulley fixed on the pipe support. The pipe support fixes the vertical support sections of the grout inlet pipe and the grout return pipe, and the traveling pulley is slidably connected to the sliding track of the mud pipe.

[0006] A preferred technical solution of the present invention is as follows: a mud pipe traction mechanism is provided at the starting end of the mud pipe sliding track, and a traction bracket is provided on the pipe support. The traction rope of the mud pipe traction mechanism is connected to the traction bracket. The traction mechanism is used to pull the vertical support sections of the pipe support and the inlet and return pipes back to the starting end of the mud pipe sliding track when the pipe support moves to the end of the mud pipe sliding track.

[0007] The preferred technical solution of the present invention is as follows: the pipe support is provided in at least two sets, distributed at the upper and lower parts of the vertical support section of the grout inlet pipe and the grout return pipe. At least two mud pipe sliding tracks are correspondingly arranged on the side wall of the shield tunneling starting area. Each mud pipe sliding track is a concave track with the track surface facing upward, and limit baffles are provided at both ends. The pipe support includes two integrated pipe clamp structures, which are respectively fixedly sleeved on the outer wall of the vertical support section of the grout inlet pipe and the grout return pipe. The traveling pulley is fixedly installed on the side of the pipe support and slidably connected to the corresponding mud pipe sliding track.

[0008] The preferred technical solution of the present invention is as follows: the fixed section of the grout inlet pipe is detachably connected to the grout inlet at the rear end of the shield tunneling trolley, the fixed section of the return grout pipe is detachably connected to the return grout inlet at the rear end of the shield tunneling trolley, and control valves are provided at both the grout inlet and the grout outlet at the rear end of the shield tunneling trolley; a construction platform is provided in the area at the lower end of the side wall of the shield tunneling starting area at the same height as the fixed section.

[0009] The preferred technical solution of the present invention is as follows: the telescopic hose section of the slurry inlet pipe and the slurry return pipe includes a horizontal hose section and a curved hose section, which are laid flat on the corresponding support platform and connected to the corresponding vertical support section through a bend pipe joint. A lubricating layer is coated on the contact surface between the slurry inlet pipe support platform and the slurry return pipe support platform and the telescopic hose.

[0010] The preferred technical solution of the present invention is as follows: the length of the sliding track of the mud pipe is 4-6m; the sliding distance of the telescopic hose sections of the mud inlet pipe and the mud return pipe on the corresponding support platform is 4-6m.

[0011] The preferred technical solution of the present invention is as follows: the traction mechanism is an electric winding mechanism and a hand-operated hoist. Each mud pipe sliding track is provided with one or two sets of traction mechanisms. The traction bracket is vertically arranged on the outer side of the pipe support and has two traction rope connection ports. The traction rope is a steel wire rope, which is wound on the drum of the electric winding mechanism or the hand-operated hoist.

[0012] This invention also provides a slurry pipe replacement method suitable for the split-type launch of large-diameter slurry shield tunneling machines. The method uses the aforementioned slurry pipe replacement system for split-type launch of slurry shield tunneling machines to perform the pipe replacement process, and its specific steps are as follows:

[0013] S1. Construct a grout inlet pipe support platform and a grout return pipe support platform on the ground. The grout inlet pipe support platform and the grout return pipe support platform are parallel to each other and parallel to the grout pipe sliding track and the tunneling direction of the tunnel boring machine. Then, place the telescopic hose sections of the grout inlet pipe and the grout return pipe on the ground on the grout inlet pipe support platform and the grout return pipe support platform respectively, and apply lubricant to the contact area between the grout inlet pipe support platform and the telescopic hose section.

[0014] S2. Connect the vertical support sections of the grout inlet pipe and the grout return pipe into one or more sets of pipe supports, and slide each set of pipe supports to the corresponding height of the grout pipe sliding track. Before the shield tunneling starts, all pipe supports are located at the starting end of the corresponding grout pipe sliding track.

[0015] S3. Connect the fixed sections of the slurry inlet pipe and the slurry return pipe to the slurry inlet and slurry outlet at the tail end of the last section of the trolley in the launching shaft, and the shield tunneling can begin. During the shield tunneling process, the vertical support sections of the slurry inlet pipe and the slurry return pipe advance synchronously along the sliding track of the mud pipe. At the same time, the telescopic hose sections of the slurry inlet pipe and the slurry return pipe 3 slide forward on the slurry inlet pipe support platform and the slurry return pipe support platform, respectively.

[0016] S4. When the shield tunneling reaches the end of the mud pipe sliding track 7, when the vertical support section of the slurry inlet pipe and return pipe moves to the end of the mud pipe sliding track 7, stop the shield tunneling; close the control valves of the slurry inlet and outlet at the end of the shield trolley, and also close the control valves of the mud station outlet and return pipe to ensure that there is no slurry in the slurry inlet pipe and return pipe; disconnect the connection between the fixed section of the slurry inlet pipe and return pipe and the shield trolley; and pull the slurry inlet pipe and return pipe back to the beginning of the mud pipe sliding track using the traction mechanism.

[0017] S5. Install an extension slurry pipe between the fixed sections of the slurry inlet pipe and the return pipe and the tunnel boring machine trolley to complete the pipe replacement process and prepare for the next stage of tunnel boring.

[0018] The preferred technical solution of the present invention is as follows: in step S3, the length of each tunneling advance by the tunnel boring machine is 4-6m; the length of the mud pipe sliding track is 4-6m; and the sliding distance of the telescopic hose sections of the slurry inlet pipe and the slurry return pipe on the corresponding support platform is matched with the length of the mud pipe sliding track.

[0019] The preferred technical solution of the present invention is as follows: the traction mechanism in step S4 is an electric winding mechanism and a hand-operated hoist; one or two sets of traction mechanisms are installed at the beginning of each mud pipe sliding track, and the traction rope of the traction mechanism is connected to the corresponding sliding bracket. When the sliding bracket slides to the end, all traction mechanisms are controlled to work simultaneously to pull the inlet pipe and return pipe back to the beginning of the mud pipe sliding track 7.

[0020] This invention enables the replacement of slurry pipes without the need for a pipe-changing device. During the advance of the tunnel boring machine (TBM), the vertical support sections of the slurry inlet and return pipes can move in parallel along the slide rails, and the flexible hose sections of the slurry inlet and return pipes can also slide and extend on the platform to ensure normal slurry circulation in the TBM. When the slurry inlet and return pipes move to the tail end of the slide rail, the control valves of the slurry inlet and outlet at the tail end of the TBM trolley can be closed, as can the control valves of the slurry outlet and return pipe at the mud station, ensuring that there is no slurry in the slurry inlet and return pipes. The connection between the fixed section of the slurry inlet and return pipes and the TBM trolley is then disconnected, and the slurry inlet and return pipes are pulled to the head end of the slide rails by a traction mechanism. Extension pipes are added between the tail end of the TBM trolley and the fixed section of the slurry inlet and return pipes, respectively, allowing the TBM tunneling process to continue.

[0021] The overall pipe replacement process of this invention is simple and convenient, and the installation and construction of the overall structure occupies little space. It can realize the process of quickly replacing pipes in a narrow space and can be used in situations where there is no space for pipe replacement device installation. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is an enlarged schematic diagram of A in Figure 1;

[0024] Figure 3 is a schematic diagram of the slurry inlet pipe and slurry return pipe of the present invention located at the starting end of the slide;

[0025] Figure 4 is a schematic diagram of the slurry inlet pipe and slurry return pipe of the present invention located at the tail end of the slide.

[0026] In the diagram: 1—mud station, 2—mud inlet pipe, 3—mud return pipe, 4—mud inlet pipe support platform, 5—mud return pipe support platform, 6—side wall of the shield launching area, 7—mud pipe sliding track, 8—sliding mechanism, 800—pipe support, 801—traveling pulley, 9—mud pipe traction mechanism, 10—traction support, 11—traction rope, 12—construction platform, 13—shield trolley. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 4 are simplified drawings of embodiments, intended only to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the drawings below are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the claimed invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Example 1 provides a mud pipe replacement system for the separate launching of a slurry shield tunneling machine, used for mud circulation during the separate launching of the shield tunneling machine. It includes a mud station 1 located on the ground and a shield tunneling trolley 13 located inside the launching shaft. The mud station 1 is equipped with a mud outlet and a mud return outlet, both equipped with control valves. The tail end of the shield tunneling trolley 13 is equipped with a mud inlet and a mud outlet, both also equipped with control valves. The mud station 1 and the shield tunneling trolley 13 are circulatedly connected via a mud inlet pipe 2 and a mud return pipe 3. The mud inlet end of the mud inlet pipe 2 is connected to the mud outlet of the mud station 1, and the mud outlet of the mud inlet pipe 2 is detachably connected to the mud inlet at the tail end of the last section of the shield tunneling trolley 13 placed inside the shaft. The mud inlet end of the mud return pipe 3 is detachably connected to the mud outlet at the tail end of the shield tunneling trolley 13, and the mud outlet end of the mud return pipe 3 is connected to the mud return outlet of the mud station 1. A construction platform 12 is set up at the lower end of the side wall 6 of the shield launching area, at the same height as the fixed section, to facilitate construction personnel to stand on the construction platform 12 to disconnect the connection between the grout inlet pipe 2 and the grout return pipe 3 and the shield trolley 13, and to add extension pipes.

[0030] The mud pipe expansion system in Embodiment 1, as shown in Figures 1 to 4, includes a mud pipe sliding track 7 installed on the side wall 6 of the shield tunneling starting area, a mud inlet pipe support platform 4 and a mud return pipe support platform 5 located on the ground. The mud inlet pipe 2 and the mud return pipe 3 each include a flexible telescopic hose section located on the ground, a fixed section connected to the tail end of the shield trolley 13, and a vertical support section connecting the flexible telescopic hose section and the fixed section. The flexible telescopic hose section of the mud inlet pipe 2 is slidably placed on the mud inlet pipe support platform 4, and the flexible telescopic hose section of the mud return pipe 3 is slidably placed on the mud return pipe support platform 5. The mud pipe sliding track 7 is parallel to the direction of travel of the shield machine. The vertical support sections of the mud inlet pipe 2 and the mud return pipe 3 are slidably connected to the mud pipe sliding track 7 through a sliding mechanism 8. The telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 include horizontal hose sections and curved hose sections, which are laid flat on the corresponding support platforms and connected to the corresponding vertical support sections through bend joints. A lubricating layer is applied to the contact surfaces of the slurry inlet pipe support platform 4 and the slurry return pipe support platform 5 with the telescopic hoses to facilitate the sliding of the slurry inlet pipe 2 and the slurry return pipe 3.

[0031] In Embodiment 1, the slurry pipe replacement system for the split-type launching slurry tunnel boring machine is shown in Figures 1 to 4. Two sets of sliding mechanisms 8 are provided, distributed at the upper and lower parts of the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3. At least two slurry pipe sliding tracks 7 are correspondingly arranged on the side wall 6 of the tunnel boring machine launching area. Each slurry pipe sliding track 7 is a concave track with its track surface facing upwards, and limit baffles are provided at both ends. Each set of sliding mechanisms 8 includes a pipe support 800 and a traveling pulley 801 fixed on the pipe support 800. The pipe support 800 includes two integrated pipe clamp structures, respectively fixedly sleeved on the outer wall of the vertical support section of the slurry inlet pipe 2 and the slurry return pipe 3. The traveling pulley 801 is fixedly installed on the side of the pipe support 800 and slidably connected to the corresponding slurry pipe sliding track 7, enabling it to move back and forth along the corresponding slurry pipe sliding track 7. The forward movement of the sliding mechanism 8 is powered by the tunnel boring machine. When the tunnel boring machine and the tunnel trolley 13 move, they will provide a traction force to the slurry inlet pipe 2 and the slurry return pipe 3, which will drive the sliding mechanism 8 to move along the slurry pipe sliding track 7.

[0032] In Embodiment 1, the power for the sliding mechanism 8 to return to its original position is provided by a mud pipe traction mechanism 9 located at the starting end of the mud pipe sliding track 7, as shown in Figures 1 and 2. The traction mechanism 9 can be an electric winding mechanism or a manual hoist. Each mud pipe sliding track 7 is provided with one or two sets of traction mechanisms 9. A traction bracket 10 is provided on the pipe support 800, vertically positioned on the outer side of the pipe support 800, and has two traction rope connection ports. The traction rope 11 of the mud pipe traction mechanism 9 is connected to the traction bracket 10. When the pipe support 800 moves to the tail end of the mud pipe sliding track 7, the traction mechanism 9 pulls the vertical support sections of the pipe support 800, the inlet pipe 2, and the return pipe 3 back to the starting end of the mud pipe sliding track 7. The traction rope 11 is a steel wire rope, wound on the drum of the electric winding mechanism or the manual hoist.

[0033] The mud station 1 of this invention is set on the ground and connected to the slurry inlet pipe 2 and slurry return pipe 3 of the tunnel boring machine to separate and process the slag generated during tunnel boring. The telescopic hose sections of the slurry inlet pipe 2 and slurry return pipe 3 are located on the ground and are supported by support platforms. The telescopic hose sections move on the corresponding support platforms. To ensure smooth movement, lubricant or Vaseline can be applied to the upper surface of the support platform in contact with the hose to ensure smooth sliding. The slurry inlet pipe support platform 4 and slurry return pipe support platform 5 are set on the ground. The specific height is adjusted according to the elevation of the station pit. Columns are set at the bottom, and the platform is erected in two layers or at the same elevation to meet the requirements of pipeline sliding. Multiple elbows are set between the rigid pipe of the slurry inlet pipe 2 and slurry return pipe 3 and the telescopic hose to achieve connection, while ensuring the rationality of the direction during pipeline extension and movement. The sliding support of the mud pipe is set in two sets, upper and lower, to ensure its sliding stability. To ensure safety and prevent the pipeline from slipping, an anti-fall device is set on the outside of the pipeline and protected by steel wire rope.

[0034] During the advance of the tunnel boring machine (TBM), the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 can move in parallel along the slurry pipe sliding track 7. The telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 can also slide and extend on the corresponding platforms to ensure that the slurry pipes can circulate the slurry normally. When the slurry inlet pipe 2 and the slurry return pipe 3 move to the tail end of the slurry pipe sliding track 7, the control valves of the slurry inlet and outlet at the tail end of the TBM trolley 13 can be closed, and the control valves of the slurry outlet and the slurry return port of the slurry station 1 can also be closed to ensure that there is no slurry in the slurry inlet pipe 2 and the slurry return pipe 3. The connection between the fixed section of the slurry inlet pipe 2 and the slurry return pipe 3 and the TBM trolley 13 is disconnected, and the slurry inlet pipe 2 and the slurry return pipe 3 are pulled to the head end of the slurry pipe sliding track 7 by the traction mechanism 9. Extension pipes are added between the tail end of the TBM trolley 13 and the fixed section of the slurry inlet pipe 2 and the slurry return pipe 3, and the tunnel boring process can continue.

[0035] Example 2 provides a mud pipe replacement method suitable for the split-launch of large-diameter slurry shield tunnels. The mud pipe replacement system for split-launch slurry shield tunnels described in Example 1 is used for the pipe replacement process, and the specific steps are as follows:

[0036] S1. Construct the grout inlet pipe support platform 4 and the grout return pipe support platform 5 on the ground. The grout inlet pipe support platform 4 and the grout return pipe support platform 5 are parallel to each other and parallel to the grout pipe sliding track 7 and the tunneling direction of the tunnel boring machine. Then, place the telescopic hose sections of the grout inlet pipe 2 and the grout return pipe 3 on the ground on the grout inlet pipe support platform 4 and the grout return pipe support platform 5 respectively, and apply lubricant to the contact area between the grout inlet pipe support platform 4 and the grout return pipe support platform 5 and the telescopic hose sections.

[0037] S2. Connect the vertical support sections of the grout inlet pipe 2 and the grout return pipe 3 into one or more sets of pipe supports, and slide each set of pipe supports to the corresponding height of the mud pipe sliding track 7. Before the shield tunneling starts, all pipe supports are located at the starting end of the corresponding mud pipe sliding track 7.

[0038] S3. Connect the fixed sections of the slurry inlet pipe 2 and the slurry return pipe 3 to the slurry inlet and outlet ports at the tail end of the last trolley section in the launching shaft, and the shield tunneling can begin. During the shield tunneling process, the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 advance synchronously along the mud pipe sliding track 7, while the telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 slide forward on the slurry inlet pipe support platform 4 and the slurry return pipe support platform 5, respectively. The length of each tunneling operation by the shield machine is 4-6m. The length of the mud pipe sliding track 7 is 4-6m. The sliding distance of the telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 on the corresponding support platforms matches the length of the mud pipe sliding track 7.

[0039] S4. When the shield tunneling reaches the tail end of the vertical support section of the slurry inlet pipe 2 and the slurry return pipe 3, stop the shield tunneling; close the control valves of the slurry inlet and outlet at the tail end of the shield trolley 13, and also close the control valves of the slurry outlet and return pipe of the mud station 1 to ensure that there is no slurry in the slurry inlet pipe 2 and the slurry return pipe 3; disconnect the connection between the fixed section of the slurry inlet pipe 2 and the slurry return pipe 3 and the shield trolley 13; and pull the slurry inlet pipe 2 and the slurry return pipe 3 back to the starting end of the mud pipe sliding track 7 using the traction mechanism; the traction mechanism is an electric winding mechanism and a hand-operated hoist; install one or two sets of traction mechanisms 9 at the starting end of each mud pipe sliding track 7, and connect the traction rope of the traction mechanism 9 to the corresponding sliding bracket 800; when the sliding bracket 800 slides to the tail end, control all the traction mechanisms 9 to work simultaneously to pull the slurry inlet pipe 2 and the slurry return pipe 3 back to the starting end of the mud pipe sliding track 7.

[0040] S5. Install an extension slurry pipe between the fixed sections of the slurry inlet pipe 2 and the return slurry pipe 3 and the shield tunneling trolley 13 to complete the pipe replacement process and prepare for the next stage of shield tunneling.

[0041] This invention utilizes the power provided by the tunnel boring machine (TBM) to drive the movement of the slurry inlet pipe 2 and the slurry return pipe 3, enabling smooth movement of the pipelines during TBM tunneling. After each certain distance is excavated, the existing pipelines are disassembled and pulled back into place, with extension pipes added in between to ensure continuous forward movement. The slurry pipes on the slurry station side are temporarily and permanently connected to the slurry pipes arranged in the sidewall structure until the split-type launch is completed, at which point modifications are made. The flexible hoses installed on the ground simultaneously extend and retract. To ensure ease of operation, a working platform is provided at the slurry pipe replacement location for convenient replacement each time. The TBM trolley has a portal frame structure with an internal vehicle passage to facilitate the transportation of tunnel segments, related materials, and consumables during TBM tunneling.

[0042] The above description is merely one embodiment of the present invention, and while it is detailed and specific, it should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A mud-water shield tunneling machine split-type launching mud pipe replacement system for mud circulation during split-type launching of a shield tunneling machine, comprising a mud station (1) located on the ground and a shield tunneling machine trolley (13) located in the launching shaft, wherein the mud station (1) and the shield tunneling machine trolley (13) are circulatedly connected via a mud inlet pipe (2) and a mud return pipe (3), characterized in that: The mud pipe replacement system includes a mud pipe sliding track (7) installed on the side wall (6) of the shield tunneling starting area, a mud inlet pipe support platform (4) and a mud return pipe support platform (5) located on the ground. The mud inlet pipe (2) and the mud return pipe (3) each include a telescopic hose section located on the ground, a fixed section connected to the tail end of the shield trolley (13), and a vertical support section connecting the telescopic hose section and the fixed section. The telescopic hose section of the mud inlet pipe (2) is slidably placed on the mud inlet pipe support platform (4), and the telescopic hose section of the mud return pipe (3) is slidably placed on the mud return pipe support platform (5). The mud pipe sliding track (7) is parallel to the direction of travel of the shield machine. The vertical support sections of the mud inlet pipe (2) and the mud return pipe (3) are slidably connected to the mud pipe sliding track (7) through a sliding mechanism (8). The system includes a pipe support (800) and a traveling pulley (801) fixed on the pipe support (800). The pipe support (800) fixes the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3). The traveling pulley (801) is slidably connected to the mud pipe sliding track (7). A mud pipe traction mechanism (9) is also provided at the starting end of the mud pipe sliding track (7). A traction bracket (10) is provided on the pipe support (800). The traction rope (11) of the traction mechanism (9) is connected to the traction bracket (10). The traction mechanism (9) is used to pull the pipe support (800) and the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3) back to the starting end of the mud pipe sliding track (7) when the pipe support (800) moves to the tail end of the mud pipe sliding track (7).

2. The slurry shield split launching pipe-replacing system according to claim 1, wherein: The pipe support (800) is provided with at least two sets, distributed on the upper and lower parts of the vertical support section of the grout inlet pipe (2) and the grout return pipe (3). At least two mud pipe sliding tracks (7) are correspondingly arranged on the side wall (6) of the shield tunneling starting area. Each mud pipe sliding track (7) is a concave track with the track surface facing upward, and limit baffles are provided at both ends. The pipe support (800) includes two integrated pipe clamp structures, which are respectively fixedly sleeved on the outer wall of the vertical support section of the grout inlet pipe (2) and the grout return pipe (3). The traveling pulley (801) is fixedly installed on the side of the pipe support (800) and slidably connected to the corresponding mud pipe sliding track (7).

3. The slurry shield split launch pipe-replacing system according to claim 1, wherein: The fixed section of the grout inlet pipe (2) is detachably connected to the grout inlet at the tail end of the shield trolley (13), and the fixed section of the return grout pipe (3) is detachably connected to the grout outlet at the tail end of the shield trolley (13). Control valves are provided at both the grout inlet and the grout outlet at the tail end of the shield trolley (13). A construction platform (12) is provided at the lower end of the side wall (6) of the shield launching area, at the same height as the fixed section.

4. The slurry shield split launch pipe-replacing system according to claim 1, wherein: The telescopic hose sections of the slurry inlet pipe (2) and the slurry return pipe (3) include horizontal hose sections and curved hose sections, which are laid flat on the corresponding support platforms and connected to the corresponding vertical support sections through the bend pipe joints. A lubricating layer is applied to the contact surfaces between the slurry inlet pipe support platform (4) and the slurry return pipe support platform (5) and the telescopic hose.

5. The slurry shield split launch pipe-replacing system according to claim 1, wherein: The length of the sliding track (7) of the mud pipe is 4-6m; the sliding distance of the telescopic hose sections of the inlet pipe (2) and the return pipe (3) on the corresponding support platform is 4-6m.

6. The slurry shield split launch pipe-replacing system according to claim 1, wherein: The traction mechanism (9) is an electric winding mechanism and a hand-operated hoist. Each mud pipe sliding track (7) is provided with one or two sets of traction mechanisms (9). The traction bracket (10) is vertically set on the outer side of the pipe support (800) and has two traction rope connection ports on the traction bracket (10). The traction rope (11) is a steel wire rope, which is wound on the drum of the electric winding mechanism or the hand-operated hoist.

7. A mud pipe changing method suitable for large-diameter slurry shield split launching, characterized in that, The pipe replacement method uses the slurry-based shield tunneling split-type slurry pipe replacement system as described in any one of claims 1 to 6 to perform the pipe replacement process, and the specific steps are as follows: S1. Construct a grout inlet pipe support platform and a grout return pipe support platform on the ground. The grout inlet pipe support platform and the grout return pipe support platform are parallel to each other and parallel to the grout pipe sliding track and the tunneling direction of the tunnel boring machine. Then, place the telescopic hose sections of the grout inlet pipe and the grout return pipe on the ground on the grout inlet pipe support platform and the grout return pipe support platform respectively, and apply lubricant to the contact area between the grout inlet pipe support platform and the telescopic hose section. S2. Connect the vertical support sections of the grout inlet pipe and the grout return pipe into one or more sets of pipe supports, and slide each set of pipe supports to the corresponding height of the grout pipe sliding track. Before the shield tunneling starts, all pipe supports are located at the starting end of the corresponding grout pipe sliding track. S3. Connect the fixed sections of the slurry inlet pipe and the slurry return pipe to the slurry inlet and slurry outlet at the tail end of the last section of the trolley in the launching shaft, and the shield tunneling can begin. During the shield tunneling process, the vertical support sections of the slurry inlet pipe and the slurry return pipe advance synchronously along the sliding track of the mud pipe. At the same time, the telescopic hose sections of the slurry inlet pipe and the slurry return pipe 3 slide forward on the slurry inlet pipe support platform and the slurry return pipe support platform, respectively. S4. When the shield tunneling reaches the end of the mud pipe sliding track 7, when the vertical support section of the slurry inlet pipe and return pipe moves to the end of the mud pipe sliding track 7, stop the shield tunneling; close the control valves of the slurry inlet and outlet at the end of the shield trolley, and also close the control valves of the mud station outlet and return pipe to ensure that there is no slurry in the slurry inlet pipe and return pipe; disconnect the connection between the fixed section of the slurry inlet pipe and return pipe and the shield trolley; and pull the slurry inlet pipe and return pipe back to the beginning of the mud pipe sliding track using the traction mechanism. S5. Install an extension slurry pipe between the fixed sections of the slurry inlet pipe and the return pipe and the tunnel boring machine trolley to complete the pipe replacement process and prepare for the next stage of tunnel boring.

8. The mud pipe changing method suitable for large-diameter slurry shield split launching according to claim 7, characterized in that: In step S3, the tunnel boring machine advances 4-6m each time; the mud pipe sliding track is 4-6m long; and the sliding distance of the telescopic hose sections of the slurry inlet pipe and return pipe on the corresponding support platform matches the length of the mud pipe sliding track.

9. The mud pipe changing method suitable for large-diameter slurry shield split launching according to claim 7, characterized in that: The traction mechanism in the S4 step is an electric winding mechanism and a hand-operated hoist; one or two sets of traction mechanisms are installed at the starting end of each mud pipe sliding track, and the traction ropes of the traction mechanisms are connected with the corresponding sliding supports; when the sliding supports slide to the tail end, all the traction mechanisms are controlled to work simultaneously to pull the in-mud pipe and the back-mud pipe back to the starting end of the mud pipe sliding track.

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