Slurry pipe changing system and method suitable for slurry shield split starting

Abstract

The application provides a slurry pipe changing system and method suitable for slurry shield split starting. The slurry pipe changing telescopic system comprises a slurry pipe sliding track arranged on a side wall of a shield starting area, a slurry inlet pipe support platform and a slurry return pipe support platform on the ground. The slurry inlet pipe and the slurry return pipe each comprise a telescopic hose section, a fixed section connected to the tail end of a shield trolley and a vertical support section connecting the telescopic hose section and the fixed section. The telescopic hose section of the slurry inlet pipe is slidably arranged on the slurry inlet pipe support platform, and the telescopic hose section of the slurry return pipe is slidably arranged on the slurry return pipe support platform. The slurry pipe sliding track is parallel to the running direction of the shield machine. The vertical support sections of the slurry inlet pipe and the slurry return pipe are slidably connected to the slurry pipe sliding track through sliding mechanisms. The whole pipe changing process is simple and convenient, and a pipe changing device is not needed. Compared with the conventional pipe changing device, the application saves construction space and is suitable for use in the case of narrow space without installation space for the pipe changing device.

Description

Technical Field

[0001] The present invention relates to the field of slurry shield construction, and in particular to a slurry pipe replacement system and method suitable for split-body starting of a slurry shield. Background Art

[0002] A slurry shield pumps a certain concentration of slurry into the shield's slurry chamber. As the soil and groundwater removed by the cutterhead flow into the excavation along the cutter grooves, the slurry concentration and pressure in the slurry chamber gradually increase, balancing the soil and water pressure on the excavation surface. This forms a mud film or a permeable wall formed by the mud-water pressure on the excavation surface, providing stable excavation. A slurry loop is formed through the slurry inlet and outlet pipes. The slurry carries the soil to the slurry-water separation station through the slurry discharge pipes, where the dry slag is separated, allowing the excavation to proceed in a circular manner. Continuous excavation is achieved by continuously extending the slurry pipelines.

[0003] The split launch of a large-diameter shield machine is a technical challenge in shield construction, especially under space-constrained conditions. How to split the shield machine and reassemble it inside the tunnel becomes a key issue. For the split launch process of a large-diameter slurry shield, in addition to considering the assembly and lifting of the shield machine, the extension of the slurry pipe is also a key consideration. Existing slurry shields reserve a sufficient length of hose on the top of the trolley to allow the inlet and outlet pipes to move forward. The trolley position remains relatively unchanged, and the pipe change operation is completed by moving the pipe-changing device traveling frame. However, since the pipe-changing device is generally installed at the end of the last trolley, in some cases where the launch shaft is small and the trolley cannot be fully lowered, the pipe change process cannot be carried out underground. Furthermore, conventional slurry pipe-changing devices occupy a large space and are complex to operate, making the installation of the ring pipe device impossible in some confined spaces. As the shield advances, how to achieve the expansion and contraction of large-diameter, high-strength slurry pipes is also a prerequisite for the successful implementation of split launch. In view of the above problems, the present invention studies a slurry pipe replacement system suitable for split-starting of a slurry shield. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a mud pipe replacement system and method suitable for split-starting of a slurry shield. The annular pipe system can realize the telescopic pipe replacement process of the slurry pipe in a narrow space, ensuring the normal operation of the split-starting of a large-diameter slurry shield.

[0005] In order to achieve the above technical objectives, the present invention provides a mud pipe replacement system suitable for the split start of a slurry shield, which is used for the mud circulation of the split start of a shield, including a mud station located on the ground and a shield trolley located in the starting well, the mud station and the shield machine trolley are circulated through a slurry inlet pipe and a slurry return pipe, the mud pipe replacement telescopic system includes a mud pipe sliding track arranged on the side wall of the shield starting area, a slurry inlet pipe support platform and a slurry return pipe support platform located on the ground, the slurry inlet pipe and the slurry return pipe both include a telescopic hose section located on the ground, a fixed hose section connected to the tail end of the shield trolley, and a slurry return pipe support platform. The telescopic hose section and the vertical support section connecting the telescopic hose section and the fixed section, the telescopic hose section of the slurry inlet pipe is slidably placed on the slurry inlet pipe support platform, the telescopic hose section of the slurry return pipe is slidably placed on the slurry return pipe support platform, the mud pipe sliding track is parallel to the traveling direction of the shield machine, the vertical support sections of the slurry inlet pipe and the slurry return pipe are slidably connected to the mud pipe sliding track through a sliding mechanism; the sliding mechanism includes a pipe bracket and a walking pulley fixed on the pipe bracket, the pipe bracket fixedly connects the vertical support section of the slurry inlet pipe and the slurry return pipe, and the walking pulley is slidably connected to the mud pipe sliding track.

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

[0007] The better technical solution of the present invention is as follows: the pipe support is provided with at least two groups, which are distributed on the upper and lower parts of the vertical support sections of the slurry inlet pipe and the slurry return pipe, and at least two mud pipe sliding tracks are arranged correspondingly on the side walls of the shield starting area. Each mud pipe sliding track is a concave track with the track surface facing upward, and limiting baffles are provided at both ends; the pipe support includes two integrated pipe clamp structures, which are respectively fixedly mounted on the outer walls of the vertical support sections of the slurry inlet pipe and the slurry return pipe, and the walking pulley is fixedly installed on the side of the pipe support and is slidably connected to the corresponding mud pipe sliding track.

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

[0009] The better 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 placed flat on the corresponding support platform and connected to the corresponding vertical support section through a curved pipe joint, and 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 mud pipe sliding track is 4-6m; the sliding distance of the telescopic hose sections of the slurry inlet pipe and the slurry return pipe on the corresponding support platform is 4-6m.

[0011] The better technical solution of the present invention is as follows: the traction mechanism is an electric winding mechanism and a hand 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 bracket, and two traction rope connection ports are provided on the traction bracket; the traction rope is a steel wire rope, which is wound on the drum of the electric winding mechanism or the hand hoist.

[0012] The present invention also provides a slurry pipe replacement method applicable to the split start of a large-diameter slurry shield. The pipe replacement method uses the above-mentioned slurry pipe replacement system applicable to the split start of a slurry shield to perform the pipe replacement process. The specific steps are as follows:

[0013] S1. Construct a support platform for the slurry feed pipe and a support platform for the slurry return pipe on the ground. The platforms are parallel to each other, the slurry pipe sliding track, and the tunneling direction of the shield machine. Then, place the telescopic hose sections of the slurry feed pipe and the slurry return pipe on the ground, respectively, and apply lubricant to the contact areas between the telescopic hose sections and the platforms.

[0014] S2. Connect the vertical support sections of the slurry inlet and return pipes through one or more sets of pipe supports. Slidingly connect each set of pipe supports to a slurry pipe sliding track at a corresponding height. Before the shield machine starts, all pipe supports are located at the starting end of the corresponding slurry pipe sliding track.

[0015] S3. Connect the fixed sections of the slurry inlet and return pipes to the slurry inlet and outlet at the rear end of the last trolley in the starting well, and the shield machine can be started; during the shield machine start, the vertical support sections of the slurry inlet and return pipes move synchronously along the slurry pipe sliding track, while the telescopic hose sections of the slurry inlet and return pipes 3 slide forward on the slurry inlet and return pipe support platforms, respectively;

[0016] S4. When the vertical support section of the slurry inlet pipe and the slurry return pipe moves to the tail end of the slurry pipe sliding track 7, stop the shield tunneling; close the control valves of the slurry inlet port and the slurry outlet port at the tail end of the shield trolley, and also close the control valves of the slurry outlet port and the slurry return port of the slurry station, so as to ensure that there is no slurry in the slurry inlet pipe and the slurry return pipe, disassemble the connection part between the fixed section of the slurry inlet pipe and the slurry return pipe and the shield trolley, and pull the slurry inlet pipe and the slurry return pipe back to the starting end of the slurry pipe sliding track through the traction mechanism;

[0017] S5. Install the extended slurry pipe between the fixed section of the slurry inlet pipe and the slurry return pipe and the shield trolley, complete the pipe replacement process, and prepare for the next stage of shield tunneling.

[0018] The preferred technical scheme of the present application: the length of each tunneling of the shield machine in the S3 step is 4-6m; the length of the slurry pipe sliding track is 4-6m; the sliding distance of the telescopic hose section of the slurry inlet pipe and the slurry return pipe on the corresponding support platform matches the length of the slurry pipe sliding track.

[0019] The preferred technical scheme of the present application: 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 slurry pipe sliding track, the traction ropes of the traction mechanisms are connected with the corresponding sliding supports, and when the sliding support slides to the tail end, all the traction mechanisms are controlled to work at the same time to pull the slurry inlet pipe and the slurry return pipe back to the starting end of the slurry pipe sliding track 7.

[0020] The present application can realize the pipe replacement process of the slurry pipe without the need for a pipe replacement device. During the forward movement of the shield machine, the vertical support section of the slurry inlet pipe and the slurry return pipe can move along the sliding track in parallel, and the hose section of the slurry inlet pipe and the slurry return pipe can also slide and extend on the platform, so as to ensure that the slurry pipe can normally perform shield slurry circulation; when the slurry inlet pipe and the slurry return pipe move to the tail end of the sliding track, the control valves of the slurry inlet port and the slurry outlet port at the tail end of the shield trolley can be closed, and the control valves of the slurry outlet port and the slurry return port of the slurry station can also be closed, so as to ensure that there is no slurry in the slurry inlet pipe and the slurry return pipe, the connection part between the fixed section of the slurry inlet pipe and the slurry return pipe and the shield trolley can be disassembled, and the slurry inlet pipe and the slurry return pipe can be pulled to the starting end of the sliding track through the traction mechanism, and the extended pipe can be added between the tail end of the shield trolley and the fixed section of the slurry inlet pipe and the slurry return pipe, so as to continue the process of shield tunneling.

[0021] The overall pipe replacement process of the present application is simple and convenient, the installation and construction of the overall structure occupy a small space, and the process of quickly replacing the pipe in a narrow space can be realized, so that the present application can be used in the case that there is no installation space for the pipe replacement device in a narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the present application;

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

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

[0025] Figure 4 It is a schematic diagram showing that the slurry inlet pipe and the slurry return pipe of the present invention are located at the tail end of the slideway.

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

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 4 The accompanying drawings are simplified versions of the embodiments and are only used to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the accompanying drawings are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the invention claimed for protection. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Embodiment 1 provides a mud pipe replacement system suitable for the split start of a mud-water shield, which is used for mud circulation for the split start of a shield, including a mud station 1 located on the ground and a shield trolley 13 located in the starting well, the mud station 1 is provided with a slurry outlet and a slurry return outlet, and the slurry outlet and the slurry return outlet are both provided with control valves, the tail end of the shield trolley 13 is provided with a slurry inlet and a slurry outlet, and the slurry inlet and the slurry outlet are both provided with control valves; the mud station 1 and the shield machine trolley 13 are circulatedly connected through a slurry inlet pipe 2 and a slurry return pipe 3, the slurry inlet end of the slurry inlet pipe 2 is connected to the slurry outlet of the mud station 1, the slurry outlet of the slurry inlet pipe 2 is detachably connected to the slurry inlet at the tail end of the last shield trolley 13 placed in the well, the slurry inlet end of the slurry return pipe 3 is detachably connected to the slurry outlet at the tail end of the shield trolley 13, and the slurry outlet end of the slurry return pipe 3 is connected to the slurry return outlet of the mud station 1. A construction platform 12 is provided at the lower end of the side wall 6 in the shield starting area at the same height as the fixed section, so that construction workers can stand on the construction platform 12 to disassemble the connection between the slurry inlet pipe 2 and the slurry return pipe 3 and the shield trolley 13 and add an extension pipe.

[0030] The mud pipe replacement and telescopic system in the first embodiment is as follows: Figures 1 to 4 As shown, it includes a mud pipe sliding track 7 arranged on the side wall 6 of the shield starting area, a slurry pipe support platform 4 and a return slurry pipe support platform 5 located on the ground. The slurry pipe 2 and the return slurry pipe 3 both 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 slurry pipe 2 is slidably placed on the slurry pipe support platform 4, and the telescopic hose section of the return slurry pipe 3 is slidably placed on the return slurry pipe support platform 5. The mud pipe sliding track 7 is parallel to the travel direction of the shield machine. The vertical support sections of the slurry pipe 2 and the return slurry pipe 3 are both slidably connected to the mud pipe sliding track 7 through a sliding mechanism 8. The telescopic hose sections of the slurry pipe 2 and the return slurry pipe 3 include a horizontal hose section and a curved hose section, which are placed flat on the corresponding support platforms and connected to the corresponding vertical support sections through elbow joints. A lubricating layer is applied to the contact surface of the slurry pipe support platform 4 and the return slurry pipe support platform 5 with the telescopic hose to facilitate the sliding of the slurry pipe 2 and the return slurry pipe 3.

[0031] The first embodiment is applicable to the slurry pipe replacement system of the slurry shield split start, such as Figures 1 to 4As shown, the sliding mechanism 8 is provided with two groups, distributed at the upper and lower parts of the vertical support sections of the slurry inlet pipe 2 and the return slurry pipe 3, and at least two mud pipe sliding tracks 7 are arranged on the side wall 6 of the shield starting area. Each mud pipe sliding track 7 is a concave track with the track surface facing upward, and a limit baffle is provided at both ends. Each group of sliding mechanisms 8 includes a pipe support 800 and a walking pulley 801 fixed on the pipe support 800. The pipe support 800 includes two integrated pipe clamp structures, which are fixedly mounted on the outer wall of the vertical support section of the slurry inlet pipe 2 and the return slurry pipe 3 respectively. The walking pulley 801 is fixedly mounted on the side of the pipe support 800 and is slidably connected to the corresponding mud pipe sliding track 7, and can move back and forth along the corresponding mud pipe sliding track 7. The power for the forward movement of the sliding mechanism 8 is provided by the shield machine. When the shield machine and the shield trolley 13 move, a traction force is applied to the slurry inlet pipe 2 and the return slurry pipe 3, driving the sliding mechanism 8 to move along the mud pipe sliding track 7.

[0032] In the first embodiment, the power for returning the sliding mechanism 8 is provided by the mud pipe traction mechanism 9 provided at the starting end of the mud pipe sliding track 7. Figure 1 and Figure 2 As shown, the traction mechanism 9 comprises an electric reeling mechanism and a hand-operated 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. The traction bracket 10 is vertically arranged 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 rear end of the mud pipe sliding track 7, the traction mechanism 9 pulls 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. The traction rope 11 is a steel wire rope, which is wound on the drum of the electric reeling mechanism or the hand-operated hoist.

[0033] The mud station 1 of the present invention is set on the ground and is connected to the slurry inlet pipe 2 and the slurry return pipe 3 of the shield machine to separate and process the slag generated by the shield excavation; the telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 are located on the ground and are supported by support platforms respectively, and the telescopic hose sections move on the corresponding support platforms. In order to ensure smooth movement, lubricant or vaseline and other materials 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 the slurry return pipe support platform 5 are set on the ground, and the specific height is adjusted according to the elevation of the station foundation pit. Columns are set at the bottom and erected into two layers or at the same elevation to meet the pipeline sliding requirements; multiple elbows are set between the hard pipes of the slurry inlet pipe 2 and the slurry return pipe 3 and the telescopic hose to achieve connection, while ensuring the rationality of the direction of the pipeline during extension and movement; the sliding bracket of the mud pipe is set in two groups, upper and lower, which can ensure its stable sliding. In order to ensure safety and prevent the pipeline from slipping, an anti-fall device is set on the outside of the pipeline and protected by a wire rope.

[0034] When the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe 2 and the slurry return pipe 3 are in the forward direction, and the slurry pipe

[0035] The second embodiment provides a slurry pipe replacement method applicable to the split start of a large-diameter slurry shield. The slurry pipe replacement system applicable to the split start of a slurry shield in the first embodiment is used to perform the pipe replacement process. The specific steps are as follows:

[0036] S1. Construct a slurry feed pipe support platform 4 and a slurry return pipe support platform 5 on the ground. The slurry feed pipe support platform 4 and the slurry return pipe support platform 5 are parallel to each other and parallel to the slurry pipe sliding track 7 and the excavation direction of the shield machine; then place the telescopic hose sections of the slurry feed pipe 2 and the slurry return pipe 3 on the ground on the slurry feed pipe support platform 4 and the slurry return pipe support platform 5 respectively, and apply lubricant to the contact areas of the slurry feed pipe support platform 4 and the slurry return pipe support platform 5 with the telescopic hose sections.

[0037] S2. Connect the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 into one through one or more groups of pipe supports, and slide each group of pipe supports to the slurry pipe sliding track 7 of the corresponding height. Before the shield starts, all pipe supports are located at the starting end of the corresponding slurry 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 slurry outlet at the rear end of the last trolley in the starting well respectively, and then the shield machine can be started; during the shield machine starting process, the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 move forward synchronously along the slurry pipe sliding track 7, and at the same time, 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 excavation of the shield machine is 4-6m; the length of the slurry 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 platform matches the length of the slurry pipe sliding track 7.

[0039] S4. When the shield tunneling reaches the vertical support section of the slurry inlet pipe 2 and the slurry return pipe 3 and moves to the tail end of the mud pipe sliding track 7, the shield tunneling is stopped; the control valves of the slurry inlet and slurry outlet at the tail end of the shield trolley 13 are closed, and the control valves of the slurry outlet and the slurry return outlet of the mud station 1 are also closed to ensure that there is no slurry in the slurry inlet pipe 2 and the slurry return pipe 3, and the connection parts of the fixed sections of the slurry inlet pipe 2 and the slurry return pipe 3 with the shield trolley 13 are disassembled, and the slurry inlet pipe 2 and the slurry return pipe 3 are pulled back to the starting end of the mud pipe sliding track 7 by the traction mechanism; the traction mechanism is an electric winding mechanism and a hand winch; one or two sets of traction mechanisms 9 are installed at the starting end of each mud pipe sliding track 7, and the traction rope of the traction mechanism 9 is connected to the corresponding sliding bracket 800. When the sliding bracket 800 slides to the tail end, all the traction mechanisms 9 are controlled 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 extended slurry pipe between the fixed sections of the slurry inlet pipe 2 and the slurry return pipe 3 and the shield trolley 13 to complete the pipe replacement process and prepare for the next stage of shield tunneling.

[0041] The present invention provides power for the tunneling of the shield machine, drives the movement of the slurry feed pipe 2 and the slurry return pipe 3, and realizes the smooth movement of the pipeline during the shield tunneling. After each tunneling distance is reached, the existing pipeline is disassembled, the original pipeline is pulled back into place, and an extension pipeline is added in the middle to ensure that the pipeline can continue to move forward. The mud pipe on the mud station side is temporarily permanently connected to the mud pipe arranged on the side wall structure until the split start is completed and the hose installed on the ground is synchronously retracted. In order to ensure the convenience of the operation, an operating platform is set at the mud pipe replacement position to facilitate each replacement of the mud pipe; the shield machine trolley is a portal frame structure with a vehicle passage reserved inside to meet the transportation of pipe segments, related and related consumables during shield tunneling.

[0042] The above is merely one embodiment of the present invention, and its description is relatively specific and detailed. However, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A slurry pipe replacement system suitable for split-starting of a slurry shield machine, used for slurry circulation during split-starting of a slurry shield machine, comprising a slurry station (1) located on the ground and a shield machine trolley (13) located in a starting shaft, wherein the slurry station (1) and the shield machine trolley (13) are circulatedly connected via a slurry inlet pipe (2) and a slurry return pipe (3), and characterized in that: The mud pipe replacement system comprises a mud pipe sliding track (7) arranged on the side wall (6) of the shield starting area, a mud pipe support platform (4) and a mud return pipe support platform (5) located on the ground, the mud pipe (2) and the mud return pipe (3) both comprise 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 pipe (2) is slidably placed on the mud pipe support platform (4), and the telescopic hose section of the mud return pipe (3) is slidably placed on the mud pipe support platform (5), the mud pipe sliding track (7) is parallel to the traveling direction of the shield machine, and the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3) are both slidably connected to the mud pipe sliding track (7) through a sliding mechanism (8); the sliding mechanism (8) includes a pipe support (800) and a walking pulley (801) fixed on the pipe support (800), the pipe support (800) fixedly connects the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3), and the walking pulley (801) is slidably connected to the mud pipe sliding track (7); A mud pipe traction mechanism (9) is further provided at the starting end of the mud pipe sliding track (7), and a traction bracket (10) is provided on the pipe bracket (800). A 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 bracket (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 bracket (800) moves to the tail end of the mud pipe sliding track (7).

2. A slurry pipe replacement system suitable for split-starting of a slurry shield according to claim 1, characterized in that: The pipe support (800) is provided with at least two groups, which are distributed on 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 shield starting area; each slurry pipe sliding track (7) is a concave track with the track surface facing upward, and a limit baffle is provided at both ends; the pipe support (800) includes two integrated pipe clamp structures, which are respectively fixedly sleeved on the outer walls of the vertical support sections of the slurry inlet pipe (2) and the slurry return pipe (3); the walking pulley (801) is fixedly installed on the side of the pipe support (800) and is slidably connected to the corresponding slurry pipe sliding track (7).

3. The slurry pipe replacement system suitable for split-starting of a slurry shield according to claim 1, characterized in that: The fixed section of the slurry inlet pipe (2) is detachably connected to the slurry inlet at the tail end of the shield trolley (13), the fixed section of the slurry return pipe (3) is detachably connected to the slurry outlet at the tail end of the shield trolley (13), and control valves are provided at the slurry inlet and the slurry outlet at the tail end of the shield trolley (13); and a construction platform (12) is provided at the lower end of the side wall (6) of the shield starting area at the same height as the fixed section.

4. The slurry pipe replacement system suitable for split-starting of a slurry shield according to claim 1, characterized in that: The telescopic hose sections of the slurry inlet pipe (2) and the slurry return pipe (3) include a horizontal hose section and a curved hose section, which are placed flat on corresponding support platforms and connected to corresponding vertical support sections via elbow joints. A lubricating layer is coated on the contact surfaces of the slurry inlet pipe support platform (4) and the slurry return pipe support platform (5) with the telescopic hoses.

5. The slurry pipe replacement system suitable for split-starting of a slurry shield according to claim 1, characterized in that: The length of the mud pipe sliding track (7) is 4-6 m; the sliding distance of the telescopic hose sections of the mud inlet pipe (2) and the mud return pipe (3) on the corresponding support platform is 4-6 m.

6. The slurry pipe replacement system suitable for split-starting of a slurry shield according to claim 1, characterized in that: The traction mechanism (9) is an electric winding mechanism and a hand chain hoist. Each mud pipe sliding track (7) is provided with one or two sets of traction mechanisms (9). The traction bracket (10) is vertically arranged on the outer side of the pipe bracket (800), and two traction rope connection ports are provided 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 chain hoist.

7. A slurry pipe replacement method suitable for split start of large diameter slurry shield, characterized in that: The pipe replacement method uses the slurry pipe replacement system suitable for split-unit starting of a slurry shield 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 support platform for the slurry feed pipe and a support platform for the slurry return pipe on the ground. The platforms are parallel to each other, the slurry pipe sliding track, and the tunneling direction of the shield machine. Then, place the telescopic hose sections of the slurry feed pipe and the slurry return pipe on the ground, respectively, and apply lubricant to the contact areas between the telescopic hose sections and the platforms. S2. Connect the vertical support sections of the slurry inlet and return pipes through one or more sets of pipe supports. Slidingly connect each set of pipe supports to a slurry pipe sliding track at a corresponding height. Before the shield machine starts, all pipe supports are located at the starting end of the corresponding slurry pipe sliding track. S3. Connect the fixed sections of the slurry inlet and return pipes to the slurry inlet and outlet ports at the rear end of the last trolley in the launch shaft, respectively. This allows the shield machine to begin operation. During the shield machine operation, the vertical support sections of the slurry inlet and return pipes advance synchronously along the slurry pipe sliding tracks, while the telescopic hose sections of the slurry inlet and return pipes slide forward on the slurry inlet and return pipe support platforms, respectively. S4. When the shield machine advances to the point where the vertical support sections of the slurry inlet and return pipes move to the rear end of the slurry pipe sliding track, stop the shield machine advance; close the control valves for the slurry inlet and outlet at the rear end of the shield trolley, and also close the control valves for the slurry outlet and return pipe at the slurry station to ensure that there is no slurry in the slurry inlet and return pipes. Disconnect the fixed sections of the slurry inlet and return pipes from the shield trolley, and use the traction mechanism to pull the slurry inlet and return pipes back to the starting end of the slurry pipe sliding track. S5. Install the extended slurry pipe between the fixed sections of the slurry inlet and return pipes and the shield trolley to complete the pipe replacement process and prepare for the next stage of shield tunneling.

8. The method for replacing slurry pipes for split-unit starting of a large-diameter slurry shield according to claim 7, characterized in that: In step S3, the shield machine excavates each time for 4-6 m; the length of the slurry pipe sliding track is 4-6 m; and the sliding distance of the telescopic hose sections of the slurry inlet pipe and slurry return pipe on the corresponding support platform matches the length of the slurry pipe sliding track.

9. The slurry pipe replacement method applicable to the split start of a large-diameter slurry shield according to claim 7, characterized in that: The traction mechanism in step S4 is an electric winding mechanism and a hand winch; one or two sets of traction mechanisms are installed at the starting end 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 tail end, all traction mechanisms are controlled to work simultaneously to pull the slurry inlet pipe and the slurry return pipe back to the starting end of the mud pipe sliding track.

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