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

Abstract

The invention provides a slurry pipe replacing system and method suitable for slurry shield split starting. The slurry pipe replacement telescopic system comprises a slurry pipe sliding rail arranged on the side wall of a shield launching area, a slurry inlet pipe supporting platform and a slurry return pipe supporting platform, the slurry inlet pipe supporting platform and the slurry return pipe supporting platform are located on the ground, and a slurry inlet pipe and a slurry return pipe each comprise a telescopic hose section, a fixed section connected to the tail end of a shield trolley and a vertical supporting section connected with the telescopic hose section and the fixed section. The telescopic hose section of the slurry inlet pipe is arranged on the slurry inlet pipe supporting platform in a sliding mode, the telescopic hose section of the slurry return pipe is arranged on the slurry return pipe supporting platform in a sliding mode, the slurry pipe sliding rail is parallel to the walking direction of the shield tunneling machine, and the vertical supporting section of the slurry inlet pipe and the vertical supporting section of the slurry return pipe are both connected with the slurry pipe sliding rail in a sliding mode through a sliding mechanism. The whole pipe replacing process is simple and convenient, a matched pipe replacing device is not needed, compared with a traditional pipe replacing device, the construction space is saved, and the pipe replacing device is suitable for being used under the condition that the space is narrow and no pipe replacing device installation space exists.

Description

Technical Field

[0001] The 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] The slurry shield pumps a certain concentration of slurry into the slurry chamber of the slurry shield. As the slag and groundwater cut off by the cutter head flow into the excavation along the cutter groove, the slurry concentration and pressure in the slurry chamber gradually increase and balance with the soil pressure and water pressure of the excavation surface, forming a mud film or a permeable wall formed by the mud and water pressure on the excavation surface, forming a stable excavation of the excavation surface. A slurry loop is formed through the slurry inlet and outlet pipes. The slurry carries the slag to the slurry and water separation station through the slurry outlet pipes, separates the dry slag, and then circulates forward for excavation, and continuous excavation is achieved by continuously extending the slurry pipeline.

[0003] The split launch of a large-diameter shield is a technical problem in shield construction, especially under the condition of limited space. 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 process of the mud pipe needs to be considered. When the existing slurry shield is extending the mud pipe, a sufficiently long hose is reserved on the top of the trolley to meet the needs of the forward movement of the inlet and outlet slurry pipelines. The position of the trolley remains relatively unchanged, and the pipe replacement operation is completed by moving the pipe replacement device walking frame; however, since the pipe replacement device is generally set at the tail end of the last trolley, for some starting wells with small space, the trolley cannot be fully lowered into the well, and the split launch is adopted, the pipe replacement process cannot be realized underground; and the conventional slurry water pipe replacement device occupies a large space and is complicated to operate. For some small spaces with limited space, the ring pipe device cannot be installed. When the shield advances forward, how to achieve the telescopic replacement of large-diameter and high-strength mud pipes is also a prerequisite for the smooth implementation of split launch. In view of the above problems, the present invention studies a mud pipe replacement system suitable for split-body starting of a mud shield. Summary of the invention

[0004] The present invention provides a mud pipe replacement system and method suitable for split start of mud water shield in view of the deficiencies in the prior art. The annular pipe system can realize the expansion and contraction pipe replacement process of the mud pipe in a narrow space, ensuring the normal split start of the large diameter mud water 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 mud-water shield machine, which is used for the mud circulation of the split start of a shield machine, including a mud station located on the ground and a shield machine trolley located in the starting well, wherein the mud station and the shield machine trolley are circulatedly connected through a slurry inlet pipe and a slurry return pipe, and 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, and 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 machine trolley, and a slurry return pipe support platform. The telescopic hose section of the slurry inlet pipe is slidably placed on the slurry inlet pipe support platform, and the telescopic hose section of the slurry return pipe is slidably placed on the slurry return pipe support platform. The slurry pipe sliding track is parallel to the traveling direction of the shield machine. The vertical supporting sections of the slurry inlet pipe and the slurry return pipe are both slidably connected to the slurry pipe sliding track through a sliding mechanism; the sliding mechanism includes a pipe support and a walking pulley fixed on the pipe support. The pipe support fixedly connects the slurry inlet pipe with the vertical supporting section of the slurry return pipe, and the walking pulley is slidably connected to the slurry 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, and the traction mechanism is used to pull the pipe bracket and the vertical supporting 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 preferred 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, and each mud pipe sliding track is a concave track with the track surface facing upward, and limiting baffles are arranged 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 outlet 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 the area at the same height as the fixed section at the lower end of the side wall of the shield starting area.

[0009] The preferred technical solution of the present invention is as follows: the telescopic hose sections of the slurry inlet pipe and the slurry return pipe include horizontal hose sections and curved hose sections, which are placed flat on corresponding support platforms and connected to corresponding vertical support sections via curved pipe joints; a lubricating layer is coated on the contact surfaces 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 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 winch, 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 winch.

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

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

[0014] S2. The vertical support sections of the slurry inlet pipe and the slurry return pipe are connected as a whole through one or more sets of pipe supports, and each set of pipe supports is slidably connected to the slurry pipe sliding track of the corresponding height. Before the shield starts, all the 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 pipe and the return slurry pipe to the slurry inlet and the slurry outlet at the tail end of the last trolley in the starting well, and then the shield machine can be started; during the shield machine start-up process, the vertical support sections of the slurry inlet pipe and the return slurry pipe move forward synchronously along the slurry pipe sliding track, and at the same time, the telescopic hose sections of the slurry inlet pipe and the return slurry pipe 3 slide forward on the slurry inlet pipe support platform and the return slurry pipe support platform respectively;

[0016] S4. When the shield tunneling reaches the end of the vertical support section of the slurry inlet and return pipes and moves to the rear end of the slurry pipe sliding track 7, stop the shield tunneling; close the control valves of the slurry inlet and outlet at the rear end of the shield trolley, and also close the control valves of the slurry outlet and return outlet of the mud station to ensure that there is no slurry in the slurry inlet and return pipes, disassemble the connection between the fixed sections of the slurry inlet and return pipes and the shield trolley, and pull the slurry inlet and return pipes 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 sections of the slurry inlet pipe and the slurry return pipe and the shield trolley to complete the pipe replacement process and prepare for the next stage of shield excavation.

[0018] The preferred technical solution of the present invention is as follows: in step S3, the length of each excavation of the shield machine is 4-6m; 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 matches the length of the mud pipe sliding track.

[0019] A better technical solution of the present invention: the traction mechanism in the S4 step 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, and when the sliding bracket slides to the tail end, all the 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 7.

[0020] The present invention can realize the pipe replacement process of the mud pipe without the need for a pipe replacement device. During the advancement of the shield machine, the vertical supporting sections of the slurry inlet pipe and the slurry return pipe can move in parallel along the slide rail, and the hose sections of the slurry inlet pipe and the slurry return pipe can also slide and stretch on the platform to ensure that the mud pipe can carry out shield mud circulation normally. When the slurry inlet pipe and the slurry return pipe move to the tail end of the slideway, the control valves of the slurry inlet and slurry outlet at the tail end of the shield trolley can be closed, and the control valves of the slurry outlet and the slurry return outlet of the mud station are also closed to ensure that there is no slurry in the slurry inlet pipe and the slurry return pipe, the connecting part of the fixed sections of the slurry inlet pipe and the slurry return pipe and the shield trolley are disassembled, and the slurry inlet pipe and the slurry return pipe are towed to the head end of the slide rail by a traction mechanism, and extension pipes are respectively added between the tail end of the shield trolley and the fixed sections of the slurry inlet pipe and the slurry return pipe, so that the shield excavation process can continue.

[0021] The overall pipe replacement process of the present invention is simple and convenient, the installation and construction of the overall structure occupies a small space, and the process of quickly replacing pipes in a small space can be realized. It can be used in situations where the space is small and there is no space for installing a pipe replacement device. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0024] Figure 3 It 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 in conjunction with the accompanying drawings and embodiments. Figures 1 to 4 The drawings are all of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The technical solutions shown in the following 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field 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. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood 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 machine, which is used for mud circulation for the split start of a shield machine, and includes a mud station 1 located on the ground and a shield trolley 13 located in a starting well. The mud station 1 is provided with a slurry outlet and a slurry return outlet, and both the slurry outlet and the slurry return outlet are provided with control valves. The tail end of the shield trolley 13 is provided with a slurry inlet and a slurry outlet, and both the slurry inlet and the slurry outlet are 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 of the shield starting area and 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 telescopic system in the first embodiment, as 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 mud pipe support platform 4 and a return mud pipe support platform 5 located on the ground, the mud pipe 2 and the return mud 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 mud pipe 2 is slidably placed on the mud pipe support platform 4, and the telescopic hose section of the return mud pipe 3 is slidably placed on the return mud pipe support platform 5, the mud pipe sliding track 7 is parallel to the travel direction of the shield machine, and the vertical support sections of the mud pipe 2 and the return mud pipe 3 are both slidably connected to the mud pipe sliding track 7 through a sliding mechanism 8. The telescopic hose sections of the mud pipe 2 and the return mud pipe 3 include 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 of the mud pipe support platform 4 and the return mud pipe support platform 5 with the telescopic hose to facilitate the sliding of the mud pipe 2 and the return mud pipe 3.

[0031] The first embodiment is applicable to the mud 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, which are distributed in 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 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 limit baffles are arranged 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 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 with the corresponding slurry pipe sliding track 7, and can move back and forth along the corresponding slurry pipe sliding track 7. The power for the sliding mechanism 8 to move forward is provided by the shield machine. When the shield machine and the shield trolley 13 move, a traction force will be given to the slurry inlet pipe 2 and the slurry return pipe 3, driving the sliding mechanism 8 to move along the slurry 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 arranged at the starting end of the mud pipe sliding track 7. Figure 1 and Figure 2 As shown, the traction mechanism 9 is an electric winding mechanism and a hand chain hoist. Each mud pipe sliding track 7 is correspondingly provided with one or two groups of traction mechanisms 9. A traction bracket 10 is provided on the pipe bracket 800. 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 of the mud pipe traction mechanism 9 is connected to the traction bracket 10. When the pipe bracket 800 moves to the tail end of the mud pipe sliding track 7, the pipe bracket 800 and the vertical support sections of 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 9. 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.

[0033] The mud station 1 of the present invention is arranged on the ground and is connected with 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 arranged on the ground, and the specific height is adjusted according to the elevation of the station foundation pit. Columns are arranged at the bottom and are erected into two layers or the same elevation to meet the pipeline sliding requirements; multiple elbows are arranged between the hard pipes of the slurry inlet pipe 2 and the slurry return pipe 3 and the telescopic hose to achieve connection, and at the same time ensure the rationality of the direction of the pipeline extension and movement; the sliding bracket of the mud pipe is arranged in two groups, which can ensure its stable sliding. In order to ensure safety and prevent the pipeline from slipping, an anti-fall device is arranged on the outside of the pipeline, and it is protected by a wire rope.

[0034] When the shield machine advances, 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, and the telescopic hose sections of the slurry inlet pipe 2 and the slurry return pipe 3 can also slide and stretch on the corresponding platform to ensure that the slurry pipe can normally circulate the shield mud; 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 slurry outlet at the tail end of the shield trolley 13 can be 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, the connection part between the fixed sections of the slurry inlet pipe 2 and the slurry return pipe 3 and the shield trolley 13 are disassembled, and the slurry inlet pipe 2 and the slurry return pipe 3 are towed to the head end of the slurry pipe sliding track 7 by the traction mechanism 9, and extension pipes are added between the tail end of the shield trolley 13 and the fixed sections of the slurry inlet pipe 2 and the slurry return pipe 3 respectively, so as to continue the shield excavation process.

[0035] Embodiment 2 provides a mud pipe replacement method applicable to the split start of a large-diameter slurry shield. The mud pipe replacement system applicable to the split start of a slurry shield in Embodiment 1 is used to perform the pipe replacement process. The specific steps are as follows:

[0036] S1. Construct a slurry inlet pipe support platform 4 and a slurry return pipe support platform 5 on the ground, wherein the slurry inlet 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 inlet pipe 2 and the slurry return pipe 3 located on the ground on the slurry inlet pipe support platform 4 and the slurry return pipe support platform 5 respectively, and apply lubricant to the contact areas of the slurry inlet pipe support platform 4 and the slurry return pipe support platform 5 with the telescopic hose sections.

[0037] S2. The vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 are connected as a whole through one or more groups of pipe supports, and each group of pipe supports is slidably connected to the mud pipe sliding track 7 of the corresponding height. Before the shield starts, all the 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 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 process of shield machine starting, 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 point where the vertical support sections of the slurry inlet pipe 2 and the slurry return pipe 3 move to the tail end of the mud pipe sliding track 7, 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 the slurry return outlet of the mud station 1 to ensure that there is no slurry in the slurry inlet pipe 2 and the slurry return pipe 3, disassemble the connection between the fixed sections 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 through the traction mechanism; the traction mechanism is an electric winding mechanism and a hand winch; install one or two sets of traction mechanisms 9 at the starting end of each mud pipe sliding track 7, and connect the traction ropes of the traction mechanisms 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 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 inlet pipe 2 and the slurry return pipe 3, and realizes the smooth movement of the pipeline during the shield tunneling. After each certain distance of tunneling, 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 and permanently connected to the mud pipe arranged on the side wall structure until the split start is completed. 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, and a vehicle passage is reserved inside to meet the transportation of pipe segments, related and related consumables during shield tunneling.

[0042] The above is only one embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A mud pipe replacement system suitable for split-starting of a slurry shield machine, used for mud circulation of split-starting of a shield machine, comprising a mud station (1) located on the ground and a shield machine trolley (13) located in a starting well, wherein the mud station (1) and the shield machine trolley (13) are circulatedly connected via a slurry inlet pipe (2) and a slurry return pipe (3), 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 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) both comprise a telescopic hose section located on the ground, a fixed section connected to the rear 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 travel 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) comprises 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).

2. A slurry pipe replacement system suitable for split start of slurry shield according to claim 1, characterized in that: A mud pipe traction mechanism (9) is also 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).

3. A slurry pipe replacement system suitable for split start of slurry shield according to claim 1 or 2, characterized in that: The pipeline 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 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 limit baffles are arranged at both ends; the pipeline 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 pipeline support (800) and is slidably connected to the corresponding slurry pipe sliding track (7).

4. A slurry pipe replacement system suitable for split start of slurry shield according to claim 1 or 2, characterized in that: The fixed section of the slurry inlet pipe (2) is detachably connected to the slurry inlet at the rear end of the shield trolley (13), the fixed section of the slurry return pipe (3) is detachably connected to the slurry outlet at the rear end of the shield trolley (13), and control valves are provided at the slurry inlet and the slurry outlet at the rear 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.

5. A slurry pipe replacement system suitable for split start of slurry shield according to claim 1 or 2, characterized in that: 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 placed flat on corresponding support platforms and connected to corresponding vertical support sections via curved pipe joints. A lubricating layer is coated on the contact surfaces between the slurry inlet pipe support platform (4) and the slurry return pipe support platform (5) and the telescopic hose.

6. A slurry pipe replacement system suitable for split start of slurry shield according to claim 1 or 2, 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.

7. A slurry pipe replacement system suitable for split start of slurry shield according to claim 2, characterized in that: The traction mechanism (9) is an electric winding mechanism and a hand winch. 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 pipeline 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 winch.

8. A slurry pipe replacement method suitable for split start of large diameter slurry shield, characterized in that: The pipe replacement method uses the mud pipe replacement system suitable for split-body starting of a slurry shield as described in any one of claims 1 to 7 to perform the pipe replacement process, and the specific steps are as follows: S1. Construct a slurry inlet pipe support platform and a slurry return pipe support platform on the ground, wherein the slurry inlet pipe support platform and the slurry return pipe support platform are parallel to each other and parallel to the slurry pipe sliding track and the tunneling direction of the shield machine; then place the telescopic hose sections of the slurry inlet pipe and the slurry return pipe on the ground on the slurry inlet pipe support platform and the slurry return pipe support platform respectively, and apply lubricant to the contact areas between the slurry inlet pipe support platform and the slurry return pipe support platform and the telescopic hose sections; S2. The vertical support sections of the slurry inlet pipe and the slurry return pipe are connected as a whole through one or more sets of pipe supports, and each set of pipe supports is slidably connected to the slurry pipe sliding track of the corresponding height. Before the shield starts, all the pipe supports are located at the starting end of the corresponding slurry pipe sliding track; S3. Connect the fixed sections of the slurry inlet pipe and the return slurry pipe to the slurry inlet and the slurry outlet at the tail end of the last trolley in the starting well, and then the shield machine can be started; during the shield machine start-up process, the vertical support sections of the slurry inlet pipe and the return slurry pipe move forward synchronously along the slurry pipe sliding track, and at the same time, the telescopic hose sections of the slurry inlet pipe and the return slurry pipe 3 slide forward on the slurry inlet pipe support platform and the return slurry pipe support platform respectively; S4. When the shield tunneling reaches the end of the vertical support section of the slurry inlet and return pipes and moves to the rear end of the slurry pipe sliding track 7, stop the shield tunneling; close the control valves of the slurry inlet and outlet at the rear end of the shield trolley, and also close the control valves of the slurry outlet and return outlet of the mud station to ensure that there is no slurry in the slurry inlet and return pipes, disassemble the connection between the fixed sections of the slurry inlet and return pipes and the shield trolley, and pull the slurry inlet and return pipes back to the starting end of the slurry pipe sliding track through the traction mechanism; S5. Install the extended slurry pipe between the fixed sections of the slurry inlet pipe and the slurry return pipe and the shield trolley to complete the pipe replacement process and prepare for the next stage of shield excavation.

9. A slurry pipe replacement method applicable to the split start of a large diameter slurry shield according to claim 8, characterized in that: In step S3, the length of each tunneling of the shield machine is 4-6m; 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 matches the length of the slurry pipe sliding track.

10. A slurry pipe replacement method applicable to the split start of a large diameter slurry shield according to claim 8, 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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