Modularized disassembly and disassembly tool and method for shield tunneling machine in tunnel

Abstract

The invention relates to the technical field of shield tunneling machine disassembly, and particularly discloses a modular disassembly, disassembly tool and method for a shield tunneling machine in a tunnel. The tool comprises a tool body, the tool body comprises an upper mounting frame and a lower mounting frame, and a support is arranged between the upper mounting frame and the lower mounting frame; two lifting plates are arranged on the upper mounting frame, and through holes are formed in the lifting plates; rollers are arranged at one end of the lower mounting rack away from the hoisting section; the tool can improve the dismounting efficiency; the method comprises the steps that S1, the water stop hoop is poured; s2, dismounting the cutter head; s3, propelling, and dismounting a hinged oil cylinder; s4, the duct piece trolley is disassembled; s5, the shield tunneling machine is electrically disassembled; s6, disassembling a hydraulic fluid pipeline; s7, the spiral conveyor is dismantled; s8, the segment erector is disassembled and transported; s9, dismounting and transporting the *-shaped beam; s10, dismounting and transporting a main driving speed reducer and a motor; s11, the man bin is dismantled; s12, disassembling the main drive; the construction method can help to ensure the smooth implementation of the dismounting process and improve the construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of shield machine disassembly, and in particular to a modular disassembly and disassembly tool and method for a shield machine in a tunnel. Background Art

[0002] With the continuous development of urban infrastructure construction, underground projects such as subways and tunnels that cross rivers and mountains are increasing. In such projects, shield machines are the main construction machinery. Shield machines require pressure balance in certain strata (such as strata containing mud and water), but this will sacrifice excavation efficiency. In other strata (such as hard rock and dry land), the pressure balance function of the shield machine is not applicable, so dismantling and transportation can be replaced with more suitable equipment to improve construction efficiency.

[0003] At present, most of the disassembly of shield machines is modular disassembly, which refers to the process of splitting a system or equipment into several independent modules. However, some of the modules are large in size and easy to install, so they can be disassembled into smaller parts and shipped out in batches, such as the cutter head of the shield machine. However, when encountering modules that are large in size and not easy to disassemble, it is inconvenient to disassemble them into multiple small parts, such as the screw conveyor in the shield machine. Since the screw conveyor is large in size and long in length, and is tilted in the shield machine, during disassembly, it is necessary to first support the screw shaft or other key components of the screw conveyor with a bracket, and then release the fixing screws on the screw conveyor. After the screw conveyor is completely disassembled and supported stably, use appropriate lifting tools (such as cranes, forklifts, etc.) to lift it and place it on a transport vehicle, and then transport it out by the transport vehicle. Since the internal space of the shield machine is small, cranes and brackets are used more frequently, which makes the construction space for dismantling personnel small, resulting in slow disassembly efficiency. Summary of the invention

[0004] The invention provides a modular disassembly and disassembly tool and method for a shield machine in a tunnel, which can overcome certain or some defects of the prior art.

[0005] According to the present invention, a modular disassembly and decomposition tool for a tunnel shield machine includes: a tool body, the tool body includes an upper mounting frame and a lower mounting frame, two brackets for connecting the upper mounting frame and the lower mounting frame are arranged between the upper mounting frame and the lower mounting frame; the upper mounting frame, the lower mounting frame and the two brackets together constitute a hoisting section for a screw conveyor to pass through; the upper mounting frame is provided with two hanging plates extending into the hoisting section, and the hanging plates are provided with through holes for ropes to pass through; a plurality of rollers are provided at one end of the lower mounting frame away from the hoisting section.

[0006] According to the present invention, when dismantling the screw conveyor, the dismantling personnel first install a plurality of lifting ears on the top of the shield machine, and the lifting ears are arranged at intervals along the length direction of the screw conveyor. Then, the plurality of tooling bodies are pushed to the screw conveyor, and then the screw conveyor is passed through the lifting intervals on the plurality of tooling bodies in sequence. Then, the hand chain hoist is hung on the hanging plate on the tooling body and on the lifting ears at the shield machine, and the chain under the hand chain hoist supports the screw conveyor; then, the screw conveyor is dismantled in sections, and after each section is dismantled, the chains between two adjacent tooling bodies are placed at the same height by adjusting the descending height of the chain under the hand chain hoist on the tooling body, so that the screw conveyor remains parallel. Then, the dismantling personnel push the tooling body and the lifting ears on the shield machine. Move the two tooling bodies to push the screw conveyor out of the tunnel in sections one by one; since the screw conveyor is set at an angle, when disassembling the screw conveyor, the length of the chain under the hand winch on the tooling body is adjusted to ensure that the screw conveyor remains parallel, to prevent the screw conveyor body from tilting and sliding off the tooling body when disassembling the screw conveyor, causing damage to the screw conveyor; and after the disassembly personnel adjust the screw conveyor to be parallel, they can transport the disassembled screw conveyor by pushing the tooling body, so that there is no need to transfer the disassembled screw conveyor to the transport vehicle, avoiding the trouble of inconvenient transportation due to the small space in the tunnel; at the same time, it also skips the transportation step and improves the disassembly efficiency.

[0007] Preferably, the bracket includes a first connecting rod arranged perpendicular to the upper mounting frame and the lower mounting frame, and both sides of the first connecting rod are provided with a second connecting rod which is inclined and connects the upper mounting frame and the lower mounting frame.

[0008] Through the present invention, a triangular supporting area is formed between the first connecting rod, the second connecting rod, the upper mounting frame and the lower mounting frame, thereby preferably improving the overall structural stability of the tooling body.

[0009] Preferably, a third connecting rod for connecting the first connecting rod and the second connecting rod is provided between the first connecting rod and the second connecting rod.

[0010] Through the present invention, the third connecting rod connects the first connecting rod and the second connecting rod, thereby enhancing the overall structural strength of the bracket.

[0011] As a priority, a limiting mechanism is provided in the lifting interval; the limiting mechanism includes a first limiting rod which is arranged along the length direction of the first connecting rod and is inclined; one end of the first limiting rod is hinged to the first connecting rod, and the other end extends to the lower mounting frame; a second limiting rod is provided at the lower mounting frame which is arranged along the width direction of the lower mounting frame and is inclined; one end of the second limiting rod is hinged to the lower mounting frame, and the other end extends toward the first connecting rod; a spring is provided at the end of the second limiting rod away from the hinge, which is used to push the second limiting rod to squeeze the first limiting rod.

[0012] Through the present invention, before pushing the tooling main body to transport the screw conveyor, the dismantling personnel adjust the descending length of the chain on the hand winch to make the screw conveyor descend to between the two first limit rods and be clamped by the two first limit rods. During the movement of the tooling main body, the screw conveyor will shake left and right, thereby squeezing the first limit rod. When the screw conveyor squeezes the first limit rod, the lower end of the first limit rod will squeeze the second limit rod, so that one end of the second limit rod squeezes the spring, thereby buffering the screw conveyor and preventing the screw conveyor from hitting the tooling main body when shaking, thereby causing damage to the tooling main body or the screw conveyor.

[0013] Preferably, the second limiting rod is provided with a limiting hole at one end away from the hinge for one end of the spring to extend into.

[0014] According to the present invention, one end of the spring extends into the limiting hole and is welded to the bottom of the limiting hole, thereby preventing the spring from being separated from the second limiting rod when the spring is compressed.

[0015] Preferably, an end of the first limiting rod close to the second limiting rod is provided with a curved surface.

[0016] Through the present invention, the arc surface on the first limit rod contacts the second limit rod, so that when one end of the first limit rod squeezes the second limit rod, the contact area between the arc surface and the second limit rod is larger, thereby preventing one end of the first limit rod from being deformed and damaged due to excessive pressure when the first limit rod squeezes the second limit rod.

[0017] The present invention provides a method for modular disassembly and decomposition of a shield machine in a tunnel, the steps of which are as follows: S1. Casting water stop ring The grouting rod is inserted into the soil layer through the grouting hole on the rear segment of the shield machine, and then the grouting machine is used to inject grout into the soil layer, so that the slurry penetrates into the soil layer and spreads along the circumference of the segment to form a water-stop ring; S2. Dismantling of the cutter head The cutter disc is disassembled in three parts: upper, middle and lower parts, and the cutter disc is cut in sequence. When cutting the lower part, first weld the lifting lugs on the surface of the cutter disc, and then use the cutting gun to separate the lower part of the cutter disc from the whole cutter disc, and then use the ground drill to set the pulling point, and then use the hand chain hoist to connect the lifting lugs and the pulling point to pull the lower part of the cutter disc out of the cutter disc. When cutting the upper part, first rotate the cutter disc and rotate the area originally located in the upper part to the bottom, and then repeat the above steps. After the upper and lower parts of the cutter disc are divided, rotate the cutter disc so that the positions originally located in the upper and lower parts are located on both sides of the cutter disc. Then weld the lifting lugs on the cutter disc and the manhole, connect the lifting lugs with the hand chain hoist, and then loosen the hand chain hoist to lay the cutter disc flat on the ground. Then cut and disassemble the remaining part of the cutter disc and transport it out of the tunnel. S3, propulsion and articulation cylinder disassembly Remove the hydraulic oil pipes of the propulsion and articulation oil cylinders, and seal the oil inlet and outlet with plugs. Use a hand chain hoist to remove the articulation oil cylinder. Use the lifting points and hand chain hoists set on the middle shield and the tail shield to tie up the articulation oil cylinder, remove the pin shaft, slowly drag out the oil cylinder, release the oil after disassembly and seal it with a plug, and place it on a transport vehicle to be transported out of the tunnel; S4. Segment Cart Disassembly Pipeline removal, removal of the hydraulic oil pipes and traction chains of the segment trolley, and then use the segment crane to place the segment trolley on the transport trolley and transport it to the tunnel receiving shaft; S5. Electrical disassembly of shield machine Remove the cables from the host to the control room, the cables from the host to the power distribution cabinet, the cables from the control room to the power distribution cabinet, and the cables from the power distribution cabinet to the trolley in turn; S6. Disassembly of hydraulic fluid pipelines Blow the hydraulic oil in the return pipe back to the oil tank, release the hydraulic oil in the oil tank, and load it into an oil drum for hoisting and transportation; release the gear oil in the main drive box; release the water in the water system; the grease pipes and hydraulic pipes that need to be removed in the shield body must be blocked with plugs to plug the oil pipes and oil ports; the hydraulic pipes and fluid pipes directly connected to the shield body from the connecting bridge are removed from the shield body end, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the bridge frame and the trailer, the connecting bridge end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the trailers, the front end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; S7, screw conveyor removal First, multiple lifting ears are installed on the top of the shield machine. The lifting ears are arranged at intervals along the length direction of the screw conveyor. Then, the dismantling personnel push multiple tooling bodies to the screw conveyor. Then, the screw conveyor is passed through the lifting intervals on the multiple tooling bodies in turn. Then, the hand chain hoist is hung on the hanging plate on the tooling body and the lifting ears at the shield machine, and the chain under the hand chain hoist supports the screw conveyor; then, the screw conveyor is disassembled in sections. After each section is disassembled, the chain under the hand chain hoist on the tooling body is adjusted to the same height between the two adjacent tooling bodies, so that the screw conveyor remains parallel. Finally, the disassembled screw conveyors are transported out of the tunnel in turn through the two tooling bodies; S8, Disassembly and transportation of segment assembly machine First, four lifting ears are welded on the top of the tail shield, and two hoists are hung at the front and the rear in the excavation direction. After the hoists are hung, the hoists at the top of the tail shield and the lifting points on the segment assembly machine are connected by chains, and then each hoist is tightened; then the transport vehicle is driven under the assembly machine, and then the steel sections are placed at the front, middle and rear positions under the main beam of the assembly machine. The steel sections are connected to the main beam of the assembly machine and the transport vehicle in the form of welding, and then the assembly machine is transported to the outside of the tunnel by the transport vehicle; S9. Removal and transportation of M-beams First, remove all pipelines and pumps, then weld 4 lifting lugs on the M-beam, 2 on the upper crossbeam, and 2 on the lower flange. Use the articulated oil cylinder to hang two hoists, connected to the bottom of the M-beam, and use the tail shield to weld 2 lifting lugs near the pipe segment to hang the hoist and connect to the upper crossbeam of the M-beam. After the four hoists are hung, they are tensioned and then the upper flange of the M-beam near the shield is cut off. After the cutting is completed, the bolts of the lower flange are removed. After the bolts are removed, the two hoists at the shield are tightened. When the M-beam shows an upward trend, the two hoists at the bottom are tightened. The four hoists cooperate with each other to slowly lower the M-beam, and finally the M-beam is transported out of the tunnel by a transport vehicle. S10. Removal and transportation of main drive reducer and motor Weld lifting lugs on the top of the shield above the main drive motor and reducer to form lifting points 1 and 2, use a hand chain hoist to hang the motor reducer, then remove the connecting bolts of the reducer, and then use the shield lifting point when removing the M-beam to transport the motor reducer backwards, and then place it on the transport vehicle; S11. Dismantling of manned warehouse After removing the motor reducer, remove the personnel cabin; weld two lifting ears just above the lifting rings on the left and right sides of the cabin to remove the cabin, use four hand-pulled hoists to connect the lifting ears on the top of the shield and the lifting rings of the cabin, and adjust the angle of the cabin by adjusting the length of the manual hoist chain to keep it horizontal; when it is 1 meter away from the transport trolley, use the two lifting points at the tail shield to hang it on the corresponding lifting rings of the cabin, and move the cabin toward the tunnel until it moves to just above the transport trolley and starts to adjust the travel of the six hoists, and finally place it on the transport trolley, transport it to the starting wellhead, and move it out of the cave; S12, main drive disassembly Before removing the main drive, first fix the cutterhead to the front shield of the shield machine, weld four steel plates to connect the cutterhead and the shield into a whole, and weld two rigid supports in front of the cutterhead and on the soil bin wall to reinforce the cutterhead. After the cutterhead is reinforced, remove the cutterhead bolts, swivel joints and internal pipes. Extend the battery car track to the translation platform; use 4 jacks to push out the main drive, then use the hand winches at two lifting points to flip the main drive, and place the main drive horizontally on a flatbed truck to transport it out of the tunnel.

[0018] The present invention can be used to grout the soil layer in advance, thereby reinforcing the soil layer around the shield machine, thereby preventing the soil layer from collapsing when the shield machine is dismantled, thereby preventing personnel from being injured. In S2, in order to facilitate disassembly and transportation, especially for later recovery, it is divided into three parts: upper, middle and lower. The cutting seam is staggered with the tool position, and the separated spoke position, the oil pipe without over-digging tool, and the place without welding stress are selected; try to cut at the original weld, and the large ring is planed away from the tool and stress concentration point; the middle block is cut with twisted legs and cutter head connection flange, and the tool and wear-resistant block at the split position need to be planed before splitting; To prevent the large circular ring from deforming, anti-deformation support must be provided with steel pipes before cutting; at the same time, the bolted flange positioning plate is welded at the cutting line; the flange plate, bolts and connecting pins are first fixed, and then welded and fixed. At the same time, the flange is also a positioning device when the cutter disc is restored later (during the later welding, the flange is first connected with bolts, and then the large circular ring is welded); the bolted flange is connected by two flange steel plates, 6 sets of bolts and an intermediate plate. The function of the intermediate plate is to prevent damage to the flange plate during gas cutting.

[0019] Welding grooves are opened on both sides of the positioning plate and the cutter disc, and the shield shell is polished to a shine before welding; the cutter disc is cut using a semi-automatic flame cutting machine to ensure the surface flatness and straightness of the cutting gap, and the semi-automatic flame cutting machine running track is fixed before cutting.

[0020] In S3, remove the hydraulic oil pipes of the propulsion and articulation cylinders, and use plugs to block the oil inlet and outlet to prevent foreign objects from entering; when shutting down, the propulsion and articulation cylinders must be fully retracted; Before removing the propulsion cylinder, spray the cylinder with a number, remove the propulsion cylinder pipeline, seal the pipeline interface with an oil plug and hang a label on it; remove the anti-rotation plate bolts and cylinder clamp bolts and clamps at the rear of the propulsion cylinder to be pulled out, and use an assembling machine with tooling and U-shaped clamps to slowly pull the cylinder out; after the cylinder is in place, use an assembling machine to rotate it to the bottom, place the removed propulsion cylinder on the flatbed of the battery car, push it out, and pull it to the wellhead to lift it out.

[0021] In S6, check the pipeline markings; those that can be left intact should be left on the machine and protected and sealed; those that need to be completely removed should be sealed and marked; use plugs or flange plates for hydraulic pipes, and plastic sheets for air and water pipes to facilitate subsequent maintenance and management.

[0022] In S8, the segment assembly machine needs to be shut down before disassembly. Before shutting down, the lifting cylinder of the assembly machine should be retracted and fixed with tooling to prevent it from slipping, and the lifting ears of the assembly machine should be checked; the mobile frame (including the rotating frame, pipeline bracket, etc.) should be moved to the appropriate position, and the mobile frame should be fixed with fixed tooling to keep the center of gravity of the assembly machine stable; the motor oil pipes, various oil cylinder oil pipes, lighting pipes and other pipelines should be disconnected and sealed in preparation for dismantling the segment assembly machine.

[0023] Through the above steps, the stability and safety of the shield machine during the disassembly process can be ensured, and the equipment can be prevented from slipping or moving during disassembly, thereby protecting the safety of construction personnel and equipment; the above steps help to ensure the smooth progress of the disassembly process and improve construction efficiency.

[0024] As a priority, in step S5, all cables must be clearly marked before being removed. Cables without marks or unclear marks should be re-marked with an oil-based marker or labeled with transparent tape.

[0025] Through the present invention, during the disassembly process, clear cable identification can help workers quickly identify the purpose and connection status of the cables, avoiding safety accidents caused by wrong disassembly or wrong connection; the clear cable identification helps workers to classify and manage the cables, thereby improving work efficiency; for cables without identification or with unclear identification, re-identification can ensure that the cables will not be damaged due to lack of identification during the disassembly and reinstallation process.

[0026] As a priority, in step S11, after the main drive motor and the reducer are removed, the reducer hole is immediately sealed and protected by a cover plate.

[0027] Through the present invention, during the disassembly process of the shield machine, after the main driving motor and the reducer are removed, if the reducer hole is not blocked, foreign objects are likely to enter; these foreign objects may cause damage to the inside of the reducer or affect its normal operation; timely blocking the reducer hole with a cover plate can effectively protect the internal parts of the reducer from external impact or damage, thereby ensuring the safety of the equipment.

[0028] As a priority, in step S12, before the main drive is placed on the flatbed, sleepers are laid on the flatbed.

[0029] Through the present invention, before the main drive is placed on the flatbed truck, the weight of the main drive can be effectively dispersed by laying sleepers, thereby preventing the flatbed truck from being damaged due to excessive pressure; the sleepers can increase the contact area between the main drive and the flatbed truck, improve the stability during transportation, and prevent the main drive from sliding or overturning during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the tooling body in Example 1.

[0031] Figure 2 This is a side schematic diagram of the tooling body in Example 1.

[0032] Figure 3 Schematic diagram of the bracket in Example 1.

[0033] Figure 4 This is a schematic diagram of the limiting mechanism in Example 1.

[0034] Figure 5 This is a schematic diagram of the second limiting rod in Example 1. DETAILED DESCRIPTION

[0035] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0036] Example 1 In the present embodiment, a modular disassembly and decomposition tooling for a tunnel tunnel boring machine is provided, which includes a tooling body 100, and the tooling body 100 includes an upper mounting frame 110 and a lower mounting frame 140, and two brackets 120 for connecting the upper mounting frame 110 and the lower mounting frame 140 are arranged between the upper mounting frame 110 and the lower mounting frame 140; the upper mounting frame 110, the lower mounting frame 140 and the two brackets 120 together constitute a hoisting section 130 for a screw conveyor to pass through; the upper mounting frame 110 is provided with two hanging plates 210 extending into the hoisting section 130, and the hanging plates 210 are provided with through holes 220 for ropes to pass through; a plurality of rollers 150 are provided at one end of the lower mounting frame 140 away from the hoisting section 130.

[0037] Through this embodiment, when dismantling the screw conveyor, the dismantling personnel first install a plurality of lifting ears on the top of the shield machine, and the lifting ears are arranged at intervals along the length direction of the screw conveyor. Then, a plurality of tooling bodies 100 are pushed to the screw conveyor, and then the screw conveyor is sequentially passed through the lifting sections 130 on the plurality of tooling bodies 100. Then, the hand chain hoist is hung on the hanging plate 210 on the tooling body 100 and on the lifting ears at the shield machine, and the chain under the hand chain hoist supports the screw conveyor; then, the screw conveyor is dismantled in sections, and after each section is dismantled, the chain between two adjacent tooling bodies 100 is adjusted to be at the same height by adjusting the lowering height of the chain under the hand chain hoist on the tooling body 100, so that the screw conveyor remains parallel. Then The dismantling personnel push the two tooling bodies 100 to push the screw conveyor out of the tunnel in sections one by one. Since the screw conveyor is set at an angle, when dismantling the screw conveyor, the length of the chain under the hand winch on the tooling body 100 is adjusted to ensure that the screw conveyor remains parallel, thereby preventing the screw conveyor body from tilting and sliding off the tooling body 100 when dismantling the screw conveyor, causing damage to the screw conveyor. After the dismantling personnel adjust the screw conveyor to be parallel, the dismantling personnel can transport the dismantled screw conveyor by pushing the tooling body 100, thereby eliminating the need to transfer the dismantled screw conveyor to a transport vehicle, thereby avoiding the trouble of inconvenient transportation due to the small space in the tunnel. At the same time, the transportation step is skipped, thereby improving the dismantling efficiency.

[0038] In this embodiment, the bracket 120 includes a first connecting rod 330 arranged perpendicular to the upper mounting frame 110 and the lower mounting frame 140 , and both sides of the first connecting rod 330 are provided with an inclined second connecting rod 310 connecting the upper mounting frame 110 and the lower mounting frame 140 .

[0039] Through this embodiment, a triangular supporting area is formed between the first connecting rod 330 and the second connecting rod 310 and the upper mounting frame 110 and the lower mounting frame 140 , thereby preferably improving the overall structural stability of the tooling body 100 .

[0040] In this embodiment, a third connecting rod 320 for connecting the first connecting rod 330 and the second connecting rod 310 is disposed between the first connecting rod 330 and the second connecting rod 310 .

[0041] According to this embodiment, the third connecting rod 320 connects the first connecting rod 330 and the second connecting rod 310 , thereby enhancing the overall structural strength of the bracket 120 .

[0042] In this embodiment, a limiting mechanism 160 is provided in the hoisting interval 130; the limiting mechanism 160 includes a first limiting rod 410 which is arranged along the length direction of the first connecting rod 330 and is inclined; one end of the first limiting rod 410 is hinged to the first connecting rod 330, and the other end extends to the lower mounting frame 140; a second limiting rod 430 which is arranged along the width direction of the lower mounting frame 140 and is inclined is provided at the lower mounting frame 140; one end of the second limiting rod 430 is hinged to the lower mounting frame 140, and the other end extends toward the first connecting rod 330; a spring 420 for pushing the second limiting rod 430 to squeeze the first limiting rod 410 is provided at the end of the second limiting rod 430 away from the hinge.

[0043] Through this embodiment, before pushing the tooling body 100 to transport the screw conveyor, the dismantling personnel adjust the descending length of the chain on the hand winch to make the screw conveyor descend to between the two first limit rods 410 and be clamped by the two first limit rods 410. During the movement of the tooling body 100, the screw conveyor will shake left and right, thereby squeezing the first limit rod 410. When the screw conveyor squeezes the first limit rod 410, the lower end of the first limit rod 410 will squeeze the second limit rod 430, so that one end of the second limit rod 430 squeezes the spring 420, thereby buffering the screw conveyor and preventing the screw conveyor from hitting the tooling body 100 when shaking, thereby causing damage to the tooling body 100 or the screw conveyor.

[0044] In this embodiment, a limiting hole 510 for one end of the spring 420 to extend into is provided at one end of the second limiting rod 430 away from the hinge.

[0045] According to this embodiment, one end of the spring 420 extends into the limiting hole 510 and is welded to the bottom of the limiting hole 510, thereby preventing the spring 420 from being separated from the second limiting rod 430 when the spring 420 is compressed.

[0046] In this embodiment, an end of the first limiting rod 410 close to the second limiting rod 430 is provided with an arc surface.

[0047] Through this embodiment, the arc surface on the first limiting rod 410 contacts the second limiting rod 430, so that when the second limiting rod 430 is squeezed at one end of the first limiting rod 410, the contact area between the arc surface and the second limiting rod 430 is larger, thereby preventing one end of the first limiting rod 410 from being deformed and damaged due to excessive pressure when the first limiting rod 410 squeezes the second limiting rod 430.

[0048] This embodiment provides a method for modular disassembly and decomposition of a shield machine in a tunnel, the steps of which are as follows: S1. Casting water stop ring The grouting rod is inserted into the soil layer through the grouting hole on the rear segment of the shield machine, and then the grouting machine is used to inject grout into the soil layer, so that the slurry penetrates into the soil layer and spreads along the circumference of the segment to form a water-stop ring; S2. Dismantling of the cutter head The cutter disc is disassembled in three parts: upper, middle and lower parts, and the cutter disc is cut in sequence. When cutting the lower part, first weld the lifting lugs on the surface of the cutter disc, and then use the cutting gun to separate the lower part of the cutter disc from the whole cutter disc, and then use the ground drill to set the pulling point, and then use the hand chain hoist to connect the lifting lugs and the pulling point to pull the lower part of the cutter disc out of the cutter disc. When cutting the upper part, first rotate the cutter disc and rotate the area originally located in the upper part to the bottom, and then repeat the above steps. After the upper and lower parts of the cutter disc are divided, rotate the cutter disc so that the positions originally located in the upper and lower parts are located on both sides of the cutter disc. Then weld the lifting lugs on the cutter disc and the manhole, connect the lifting lugs with the hand chain hoist, and then loosen the hand chain hoist to lay the cutter disc flat on the ground. Then cut and disassemble the remaining part of the cutter disc and transport it out of the tunnel. S3, propulsion and articulation cylinder disassembly Remove the hydraulic oil pipes of the propulsion and articulation oil cylinders, and seal the oil inlet and outlet with plugs. Use a hand chain hoist to remove the articulation oil cylinder. Use the lifting points and hand chain hoists set on the middle shield and the tail shield to tie up the articulation oil cylinder, remove the pin shaft, slowly drag out the oil cylinder, release the oil after disassembly and seal it with a plug, and place it on a transport vehicle to be transported out of the tunnel; S4. Segment Cart Disassembly Pipeline removal, removal of the hydraulic oil pipes and traction chains of the segment trolley, and then use the segment crane to place the segment trolley on the transport trolley and transport it to the tunnel receiving shaft; S5. Electrical disassembly of shield machine Remove the cables from the host to the control room, the cables from the host to the power distribution cabinet, the cables from the control room to the power distribution cabinet, and the cables from the power distribution cabinet to the trolley in turn; S6. Disassembly of hydraulic fluid pipelines Blow the hydraulic oil in the return pipe back to the oil tank, release the hydraulic oil in the oil tank, and load it into an oil drum for hoisting and transportation; release the gear oil in the main drive box; release the water in the water system; the grease pipes and hydraulic pipes that need to be removed in the shield body must be blocked with plugs to plug the oil pipes and oil ports; the hydraulic pipes and fluid pipes directly connected to the shield body from the connecting bridge are removed from the shield body end, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the bridge frame and the trailer, the connecting bridge end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the trailers, the front end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; S7, screw conveyor removal First, multiple lifting ears are installed on the top of the shield machine, and the lifting ears are arranged at intervals along the length direction of the screw conveyor. Then, the dismantling personnel push multiple tooling bodies 100 to the screw conveyor, and then the screw conveyor is sequentially passed through the lifting intervals 130 on the multiple tooling bodies 100, and then the hand chain hoist is hung on the hanging plate 210 on the tooling body 100 and the lifting ears at the shield machine, and the chain under the hand chain hoist supports the screw conveyor; then the screw conveyor is disassembled in sections, and after each section is disassembled, the chain under the hand chain hoist on the tooling body 100 is adjusted to be at the same height between the two adjacent tooling bodies 100, so that the screw conveyor remains parallel, and finally the disassembled screw conveyors are sequentially transported out of the tunnel through the two tooling bodies 100; S8, Disassembly and transportation of segment assembly machine First, four lifting ears are welded on the top of the tail shield, and two hoists are hung at the front and the rear in the excavation direction. After the hoists are hung, the hoists at the top of the tail shield and the lifting points on the segment assembly machine are connected by chains, and then each hoist is tightened; then the transport vehicle is driven under the assembly machine, and then the steel sections are placed at the front, middle and rear positions under the main beam of the assembly machine. The steel sections are connected to the main beam of the assembly machine and the transport vehicle in the form of welding, and then the assembly machine is transported to the outside of the tunnel by the transport vehicle; S9. Removal and transportation of M-beams First, remove all pipelines and pumps, then weld 4 lifting lugs on the M-beam, 2 on the upper crossbeam, and 2 on the lower flange. Use the articulated oil cylinder to hang two hoists, connected to the bottom of the M-beam, and use the tail shield to weld 2 lifting lugs near the pipe segment to hang the hoist and connect to the upper crossbeam of the M-beam. After the four hoists are hung, they are tensioned and then the upper flange of the M-beam near the shield is cut off. After the cutting is completed, the bolts of the lower flange are removed. After the bolts are removed, the two hoists at the shield are tightened. When the M-beam shows an upward trend, the two hoists at the bottom are tightened. The four hoists cooperate with each other to slowly lower the M-beam, and finally the M-beam is transported out of the tunnel by a transport vehicle. S10. Removal and transportation of main drive reducer and motor Weld lifting lugs on the top of the shield above the main drive motor and reducer to form lifting points 1 and 2, use a hand chain hoist to hang the motor reducer, then remove the connecting bolts of the reducer, and then use the shield lifting point when removing the M-beam to transport the motor reducer backwards, and then place it on the transport vehicle; S11. Dismantling of manned warehouse After removing the motor reducer, remove the personnel cabin; weld two lifting ears just above the lifting rings on the left and right sides of the cabin to remove the cabin, use four hand-pulled hoists to connect the lifting ears on the top of the shield and the lifting rings of the cabin, and adjust the angle of the cabin by adjusting the length of the manual hoist chain to keep it horizontal; when it is 1 meter away from the transport trolley, use the two lifting points at the tail shield to hang it on the corresponding lifting rings of the cabin, and move the cabin toward the tunnel until it moves to just above the transport trolley and starts to adjust the travel of the six hoists, and finally place it on the transport trolley, transport it to the starting wellhead, and move it out of the cave; S12, main drive disassembly Before removing the main drive, first fix the cutterhead to the front shield of the shield machine, weld four steel plates to connect the cutterhead and the shield into a whole, and weld two rigid supports in front of the cutterhead and on the soil bin wall to reinforce the cutterhead. After the cutterhead is reinforced, remove the cutterhead bolts, swivel joints and internal pipes. Extend the battery car track to the translation platform; use 4 jacks to push out the main drive, then use the hand winches at two lifting points to flip the main drive, and place the main drive horizontally on a flatbed truck to transport it out of the tunnel.

[0049] Through this embodiment, the soil layer is grouted in advance, so as to reinforce the soil layer around the shield machine, and prevent the soil layer from collapsing when the shield machine is dismantled, thereby preventing personnel from being injured; In S2, in order to facilitate disassembly and transportation, especially for later recovery, it is divided into three parts: upper, middle and lower. The cutting seam is staggered with the tool position, and the separated spoke position, the oil pipe without over-digging tool, and the place without welding stress are selected; try to cut at the original weld, and the large ring is planed away from the tool and stress concentration point; the middle block is cut with twisted legs and cutter head connection flange, and the tool and wear-resistant block at the split position need to be planed before splitting; To prevent the large circular ring from deforming, anti-deformation support must be provided with steel pipes before cutting; at the same time, the bolted flange positioning plate must be welded at the cutting line; the flange plate, bolts and connecting pins must be fixed first, and then welded and fixed. At the same time, the flange is also a positioning device when the cutter disc is restored later (during the later welding, the flange is first connected with bolts, and then the large circular ring is welded); the bolted flange is connected by two flange steel plates, 6 sets of bolts and an intermediate plate. The function of the intermediate plate is to prevent damage to the flange plate during gas cutting.

[0050] Welding grooves are opened on both sides of the positioning plate and the cutter disc, and the shield shell is polished to a shine before welding; the cutter disc is cut using a semi-automatic flame cutting machine to ensure the surface flatness and straightness of the cutting gap, and the semi-automatic flame cutting machine running track is fixed before cutting.

[0051] In S3, remove the hydraulic oil pipes of the propulsion and articulation cylinders, and use plugs to block the oil inlet and outlet to prevent foreign objects from entering; when shutting down, the propulsion and articulation cylinders must be fully retracted; Before removing the propulsion cylinder, spray the cylinder with a number, remove the propulsion cylinder pipeline, seal the pipeline interface with an oil plug and hang a label on it; remove the anti-rotation plate bolts and cylinder clamp bolts and clamps at the rear of the propulsion cylinder to be pulled out, and use an assembling machine with tooling and U-shaped clamps to slowly pull the cylinder out; after the cylinder is in place, use an assembling machine to rotate it to the bottom, place the removed propulsion cylinder on the flatbed of the battery car, push it out, and pull it to the wellhead to lift it out.

[0052] In S6, check the pipeline markings; those that can be left intact should be left on the machine and protected and sealed; those that need to be completely removed should be sealed and marked; use plugs or flange plates for hydraulic pipes, and plastic sheets for air and water pipes to facilitate subsequent maintenance and management.

[0053] In S8, the segment assembly machine needs to be shut down before disassembly. Before shutting down, the lifting cylinder of the assembly machine should be retracted and fixed with tooling to prevent slipping, and the lifting ears of the assembly machine should be checked; the mobile frame (including the rotating frame, pipeline bracket, etc.) should be moved to the appropriate position, and the mobile frame should be fixed with fixed tooling to keep the center of gravity of the assembly machine stable; the motor oil pipes, various oil cylinder oil pipes, lighting pipes and other pipelines should be disconnected and sealed in preparation for dismantling the segment assembly machine.

[0054] Through the above steps, the stability and safety of the shield machine during the disassembly process can be ensured, and the equipment can be prevented from slipping or moving during disassembly, thereby protecting the safety of construction personnel and equipment; the above steps help to ensure the smooth progress of the disassembly process and improve construction efficiency.

[0055] In this embodiment, in step S5, all cables must be clearly marked before being removed. Cables without marks or unclear marks are re-marked with an oil-based marker or labeled with transparent tape.

[0056] Through this embodiment, during the disassembly process, clear cable identification can help workers quickly identify the purpose and connection status of the cables, avoiding safety accidents caused by accidental disassembly or misconnection; clear cable identification helps workers to classify and manage cables and improve work efficiency; for cables without identification or unclear identification, re-identification can ensure that the cables will not be damaged due to lack of identification during the disassembly and reinstallation process.

[0057] In this embodiment, in step S11, after the main driving motor and the reducer are removed, the reducer hole is immediately blocked and protected by a cover plate.

[0058] Through this embodiment, during the disassembly of the shield machine, after the main drive motor and the reducer are removed, if the reducer hole is not sealed, foreign objects may easily enter; these foreign objects may cause damage to the inside of the reducer or affect its normal operation; timely sealing of the reducer hole with a cover plate can effectively protect the internal parts of the reducer from external impact or damage, thereby ensuring the safety of the equipment.

[0059] In this embodiment, in step S12, before the main drive is placed on the flatbed, sleepers are laid on the flatbed.

[0060] Through this embodiment, before the main drive is placed on the flatbed truck, laying sleepers can effectively disperse the weight of the main drive and prevent the flatbed truck from being damaged due to excessive pressure; the sleepers can increase the contact area between the main drive and the flatbed truck, improve the stability during transportation, and prevent the main drive from sliding or overturning during transportation.

[0061] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0062] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A modular disassembly and disassembly tool for a shield machine in a tunnel, characterized by: The tooling body (100) includes an upper mounting frame (110) and a lower mounting frame (140); two brackets (120) for connecting the upper mounting frame (110) and the lower mounting frame (140) are arranged between the upper mounting frame (110) and the lower mounting frame (140); the upper mounting frame (110), the lower mounting frame (140) and the two brackets (120) together constitute a hoisting section (130) for a screw conveyor to pass through; the upper mounting frame (110) is provided with two hanging plates (210) extending into the hoisting section (130); the hanging plates (210) are provided with through holes (220) for ropes to pass through; and a plurality of rollers (150) are provided at one end of the lower mounting frame (140) away from the hoisting section (130).

2. The modular disassembly and disassembly tooling for a shield machine in a tunnel according to claim 1, characterized in that: The bracket (120) comprises a first connecting rod (330) arranged perpendicular to the upper mounting frame (110) and the lower mounting frame (140), and both sides of the first connecting rod (330) are provided with a second connecting rod (310) which is arranged obliquely and connects the upper mounting frame (110) and the lower mounting frame (140).

3. The modular disassembly and disassembly tooling for a shield machine in a tunnel according to claim 2, characterized in that: A third connecting rod (320) for connecting the first connecting rod (330) and the second connecting rod (310) is provided between the first connecting rod (330) and the second connecting rod (310).

4. The modular disassembly and disassembly tool for a shield machine in a tunnel according to claim 1, characterized in that: A limiting mechanism (160) is provided in the hoisting section (130); the limiting mechanism (160) comprises a first limiting rod (410) which is arranged along the length direction of the first connecting rod (330) and is arranged obliquely; one end of the first limiting rod (410) is hinged to the first connecting rod (330), and the other end extends to the lower mounting frame (140); a second limiting rod (430) which is arranged along the width direction of the lower mounting frame (140) and is arranged obliquely is provided at the lower mounting frame (140); one end of the second limiting rod (430) is hinged to the lower mounting frame (140), and the other end extends to the first connecting rod (330); a spring (420) is provided at the end of the second limiting rod (430) away from the hinge, and is used to push the second limiting rod (430) to squeeze the first limiting rod (410).

5. The modular disassembly and disassembly tool for a shield machine in a tunnel according to claim 4, characterized in that: The second limiting rod (430) is provided with a limiting hole (510) at one end away from the hinge for one end of the spring (420) to extend into.

6. The modular disassembly and disassembly tool for a shield machine in a tunnel according to claim 4, characterized in that: An arc-shaped surface is provided at one end of the first limiting rod (410) close to the second limiting rod (430).

7. A method for modular disassembly and disassembly of a shield machine in a tunnel, comprising an auxiliary disassembly tool as claimed in any one of claims 1 to 6, and the steps are as follows: S1. Casting water stop ring The grouting rod is inserted into the soil layer through the grouting hole on the rear segment of the shield machine, and then the grouting machine is used to inject grout into the soil layer, so that the slurry penetrates into the soil layer and spreads along the circumference of the segment to form a water-stop ring; S2. Dismantling of the cutter head The cutter disc is disassembled in three parts: upper, middle and lower parts, and the cutter disc is cut in sequence. When cutting the lower part, first weld the lifting lugs on the surface of the cutter disc, and then use the cutting gun to separate the lower part of the cutter disc from the whole cutter disc, and then use the ground drill to set the pulling point, and then use the hand chain hoist to connect the lifting lugs and the pulling point to pull the lower part of the cutter disc out of the cutter disc. When cutting the upper part, first rotate the cutter disc and rotate the area originally located in the upper part to the bottom, and then repeat the above steps. After the upper and lower parts of the cutter disc are divided, rotate the cutter disc so that the positions originally located in the upper and lower parts are located on both sides of the cutter disc. Then weld the lifting lugs on the cutter disc and the manhole, connect the lifting lugs with the hand chain hoist, and then loosen the hand chain hoist to lay the cutter disc flat on the ground. Then cut and disassemble the remaining part of the cutter disc and transport it out of the tunnel. S3, propulsion and articulation cylinder disassembly Remove the hydraulic oil pipes of the propulsion and articulation oil cylinders, and seal the oil inlet and outlet with plugs. Use a hand chain hoist to remove the articulation oil cylinder. Use the lifting points and hand chain hoists set on the middle shield and the tail shield to tie up the articulation oil cylinder, remove the pin shaft, slowly drag out the oil cylinder, release the oil after disassembly and seal it with a plug, and place it on a transport vehicle to be transported out of the tunnel; S4. Segment Cart Disassembly Pipeline removal, removal of the hydraulic oil pipes and traction chains of the segment trolley, and then use the segment crane to place the segment trolley on the transport trolley and transport it to the tunnel receiving shaft; S5. Electrical disassembly of shield machine Remove the cables from the host to the control room, the cables from the host to the power distribution cabinet, the cables from the control room to the power distribution cabinet, and the cables from the power distribution cabinet to the trolley in turn; S6, Disassembly of hydraulic fluid pipeline Blow the hydraulic oil in the return pipe back to the oil tank, release the hydraulic oil in the oil tank, and load it into an oil drum for hoisting and transportation; release the gear oil in the main drive box; release the water in the water system; the grease pipes and hydraulic pipes that need to be removed in the shield body must be blocked with plugs to plug the oil pipes and oil ports; the hydraulic pipes and fluid pipes directly connected to the shield body from the connecting bridge are removed from the shield body end, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the bridge frame and the trailer, the connecting bridge end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; the hose connecting the trailers, the front end is removed, and the hydraulic pipes and grease pipes are blocked with plugs, and the water pipes and air pipes are sealed with plastic paper; S7, screw conveyor removal First, a plurality of lifting eyes are installed on the top of the shield machine, and the lifting eyes are arranged at intervals along the length direction of the screw conveyor. Then, the dismantling personnel push the plurality of tooling bodies (100) to the screw conveyor, and then the screw conveyor is sequentially passed through the lifting sections (130) on the plurality of tooling bodies (100). Then, the hand chain hoist is hung on the hanging plate (210) on the tooling body (100) and the lifting eyes at the shield machine, and the chain under the hand chain hoist supports the screw conveyor. Then, the screw conveyor is disassembled in sections. After each section is disassembled, the chain under the hand chain hoist on the tooling body (100) is adjusted to a lowering height so that the chains between two adjacent tooling bodies (100) are at the same height, so that the screw conveyors remain parallel. Finally, the disassembled screw conveyors are sequentially transported out of the tunnel through the two tooling bodies (100); S8, Disassembly and transportation of segment assembly machine First, four lifting ears are welded on the top of the tail shield, and two hoists are hung at the front and the rear in the excavation direction. After the hoists are hung, the hoists at the top of the tail shield and the lifting points on the segment assembly machine are connected by chains, and then each hoist is tightened; then the transport vehicle is driven under the assembly machine, and then the steel sections are placed at the front, middle and rear positions under the main beam of the assembly machine. The steel sections are connected to the main beam of the assembly machine and the transport vehicle in the form of welding, and then the assembly machine is transported to the outside of the tunnel by the transport vehicle; S9. Removal and transportation of M-beams First, remove all pipelines and pumps, then weld 4 lifting lugs on the M-beam, 2 on the upper crossbeam, and 2 on the lower flange. Use the articulated oil cylinder to hang two hoists, connected to the bottom of the M-beam, and use the tail shield to weld 2 lifting lugs near the pipe segment to hang the hoist and connect to the upper crossbeam of the M-beam. After the four hoists are hung, they are tensioned and then the upper flange of the M-beam near the shield is cut off. After the cutting is completed, the bolts of the lower flange are removed. After the bolts are removed, the two hoists at the shield are tightened. When the M-beam shows an upward trend, the two hoists at the bottom are tightened. The four hoists cooperate with each other to slowly lower the M-beam, and finally the M-beam is transported out of the tunnel by a transport vehicle. S10. Removal and transportation of main drive reducer and motor Weld lifting lugs on the top of the shield above the main drive motor and reducer to form lifting points 1 and 2, use a hand chain hoist to hang the motor reducer, then remove the connecting bolts of the reducer, and then use the shield lifting point when removing the M-beam to transport the motor reducer backwards, and then place it on the transport vehicle; S11. Dismantling of manned warehouse After removing the motor reducer, remove the personnel cabin; weld two lifting ears just above the lifting rings on the left and right sides of the cabin to remove the cabin, use four hand-pulled hoists to connect the lifting ears on the top of the shield and the lifting rings of the cabin, and adjust the angle of the cabin by adjusting the length of the manual hoist chain to keep it horizontal; when it is 1 meter away from the transport trolley, use the two lifting points at the tail shield to hang it on the corresponding lifting rings of the cabin, and move the cabin toward the tunnel until it moves to just above the transport trolley and starts to adjust the travel of the six hoists, and finally place it on the transport trolley, transport it to the starting wellhead, and move it out of the cave; S12, main drive disassembly Before removing the main drive, first fix the cutterhead to the front shield of the shield machine, weld four steel plates to connect the cutterhead and the shield into a whole, and weld two rigid supports in front of the cutterhead and on the soil bin wall to reinforce the cutterhead. After the cutterhead is reinforced, remove the cutterhead bolts, swivel joints and internal pipes. Extend the battery car track to the translation platform; use 4 jacks to push out the main drive, then use the hand winches at two lifting points to flip the main drive, and place the main drive horizontally on a flatbed truck to transport it out of the tunnel.

8. The method for modular disassembly and decomposition of a shield machine in a tunnel according to claim 7, characterized in that: In step S5, all cables must be clearly marked before being removed. Cables without marks or unclear marks should be re-marked with an oil-based marker or labeled with transparent tape.

9. The method for modular disassembly and decomposition of a shield machine in a tunnel according to claim 7, characterized in that: In step S11, after the main drive motor and the reducer are removed, the reducer hole is immediately sealed and protected by a cover plate.

10. The method for modular disassembly and decomposition of a shield machine in a tunnel according to claim 7, characterized in that: In step S12, before the main drive is placed on the flatbed, sleepers are laid on the flatbed.

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