In-hole disassembling method of shield tunneling machine

Abstract

The invention provides an in-hole disassembling method of a shield tunneling machine, which comprises the following steps: providing a disassembling chamber, installing a machine disassembling tool capable of sliding along the front-back direction of the shield tunneling machine in the disassembling chamber, and forming a disassembling space by the machine disassembling tool; the shield tunneling machine is moved to a designated position, and a to-be-disassembled module of the shield tunneling machine is located in the disassembling space; the front middle shield body is translated to a set position, a cutterhead containing area is reserved on the front side of the front middle shield body to contain a cutterhead, and a disassembling area is reserved on the rear side of the front middle shield body to disassemble the front middle shield body; the cutterhead is disassembled step by step and placed in the cutterhead placing area; gradually disassembling and transporting the front middle shield body and the main drive; the cutterhead module is transported to an originating wellhead. According to the in-hole disassembling method for the shield tunneling machines, the shield tunneling machines are disassembled one by one through the disassembling tool and the lifting hook and conveyed to the starting wellhead through the transport vehicle, the process is safe and controllable, and implementation is convenient.

Description

Technical Field

[0001] This application relates to the technical field of tunnel boring equipment, and particularly to a method for in-tunnel plug-in connection of a shield machine. Background Art

[0002] A shield machine is the most commonly used construction machinery in current underground tunnel projects and has been widely used in infrastructure construction such as urban water conservancy, hydropower, subways, and highways. In some construction projects, a earth pressure balance shield machine is selected by the construction party because it can maintain the earth pressure balance of the excavation face during tunneling, thereby ensuring the safety and efficiency of construction. Limited by the ground conditions or the requirements of municipal construction, it is impossible to excavate a recovery well for the shield machine, and the shield machine can only be disassembled in the tunnel and then transported to the ground separately. The single-piece weight and size of the large components of the shield machine are relatively large, and it is difficult to control the safety and quality during disassembly and hoisting. At the same time, restricted by the space of the disassembly chamber, large mechanical equipment cannot operate, and the efficiency of construction personnel using small equipment for construction is relatively low, and the construction risk is relatively large.

[0003] In view of this, it is necessary to design a method for in-tunnel disassembly of a shield machine to solve one of the above problems. Summary of the Invention

[0004] This application provides a method for in-tunnel disassembly of a shield machine. Using this disassembly method, the shield machine is disassembled into main components in the disassembly tunnel, then transported to the starting shaft, and then lifted to the ground by a crawler crane.

[0005] To achieve the above object, the technical solution provided by this application is as follows: A method for in-tunnel disassembly of a shield machine, applicable to in-tunnel disassembly of an earth pressure balance type. The disassembly method includes: Provide a disassembly chamber, and install a disassembly tooling in the disassembly chamber that can slide in the front-back direction of the shield machine. The disassembly tooling forms a disassembly space; Move the shield machine to a designated position, where the module to be disassembled of the shield machine is located in the disassembly space; Disassemble and transport the screw conveyor, segment erector, tail shield, and ring in sequence; Translate the front and middle shield to a predetermined position, where a cutter head placement area is reserved in the front side of the front and middle shield to place the cutter head, and a disassembly area is reserved in the rear side of the front and middle shield to disassemble the front and middle shield; Gradually disassemble the cutter head and place it in the cutter head placement area; Gradually disassemble and transport the front and middle shield and the main drive; Transport the cutter head to the starting shaft.

[0006] Furthermore, the cutter disc includes an A1 module, an A2 module, and an A3 module. Before the cutter disc is gradually disassembled and placed in the cutter disc placement area, a support frame for supporting the A1 module, the A2 module, and the A3 module respectively is first set in the cutter disc placement area.

[0007] Furthermore, the front middle shield body includes C1 module, C2 module, C3 module and C4 module. The above-mentioned stepwise disassembly and transportation of the front middle shield body and the main drive are specifically: first disassembly the C1 module, C2 module and C3 module, then disassembly the main drive, and finally disassembly the C4 module.

[0008] Furthermore, the main drive is disassembled, and a turning frame is first installed at the bottom of the dismantling tooling. The horizontal movement of the dismantling tooling cooperates with the lifting of the hand winch to turn the main drive over to a horizontal state.

[0009] Furthermore, when the angle of the target module needs to be adjusted during the lifting process, a shoulder pole beam is first installed on the dismantling tooling, and the target module is adjusted in angle by the shoulder pole beam and placed on a transport vehicle.

[0010] Furthermore, during the process of hoisting and flipping the target module, the deflection angle of the traction rope is no greater than 11°.

[0011] Furthermore, before installing the dismantling tooling in the dismantling cave, the foundation in the dismantling cave is first treated, and the bearing capacity of the treated foundation is not less than , is the total gravity of the hoisting target module and the equipment in contact with the target module, n is the safety factor, and S is the contact area between the equipment in contact with the target module and the ground.

[0012] Furthermore, before installing the dismantling tool in the dismantling cave, a track for sliding the dismantling tool is installed in the dismantling cave, and the slope of the track does not exceed 3‰.

[0013] Furthermore, before the shield machine is pushed to the designated position, a pair of inner rails for the shield machine to move and a pair of outer rails located outside the pair of inner rails are pre-buried on the ground of the dismantled cavern, the included angle of the pair of inner rails is 25° to 27°, and the included angle of the pair of outer rails is 36° to 38°.

[0014] Furthermore, before transporting each target module, simulated transportation is first performed on each target module, and a safe distance is reserved between the target module and the inner wall of the disassembly cave.

[0015] Compared with the related art, the beneficial effect of the present application lies in that: through the in-hole disassembly method of the shield machine of the present application, the shield machine is disassembled one by one by using disassembly tooling and hooks and transported to the starting wellhead by a transport vehicle. The process is safe, controllable and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flow chart of the method for disassembling a shield machine in a tunnel, which is an embodiment of the method for disassembling a shield machine in this application.

[0017] Figure 2 It is Figure 1 The front view structural schematic diagram of the shield machine located in the disassembly chamber in

[0018] Figure 3 It is Figure 2 The side view structural schematic diagram of the shield machine in

[0019] Figure 4 It is Figure 2 The front view structural schematic diagram of the disassembly tooling in

[0020] Figure 5 It is Figure 4 The side view structural schematic diagram of the disassembly tooling in

[0021] Figure 6 It is Figure 4 The top view structural schematic diagram of the disassembly tooling in

[0022] Figure 7 It is Figure 2 The side view structural schematic diagram of the disassembled screw conveyor in

[0023] Figure 8 It is Figure 2 The side view structural schematic diagram of the disassembled segment erector in

[0024] Figure 9 It is Figure 2 The front view structural schematic diagram of the disassembled shield tail body in

[0025] Figure 10 It is Figure 2 The front view structural schematic diagram of the disassembled ring body d1 module in

[0026] Figure 11 It is Figure 2 The front view structural schematic diagram of the disassembled ring body d3 module in Figure 12 It is Figure 2 The side view structural schematic diagram of the disassembled front and middle shield body after translation in

[0027] Figure 13 It is Figure 2 The front view structural schematic diagram of the disassembled cutter head in

[0028] Figure 14 It is Figure 2 The front view structural schematic diagram of the disassembled front and middle shield body in

[0029] Figure 15 It is Figure 2Schematic side view structure diagram of the front, middle and rear bodies before disassembly.

[0030] 1 - Disassembly tooling, 10 - Main body frame, 11 - Support columns, 111 - First support column, 112 - Second support column, 12 - Top frame, 121 - Load-bearing beams, 1211 - First load-bearing beam, 1212 - Second load-bearing beam, 1213 - Third load-bearing beam, 122 - Cross beam, 123 - Inclined beam, 13 - Disassembly space, 14 - Connecting beam, 20 - Driving mechanism, 21 - Wheels, 2 - Hook, 3 - Shield machine, 31 - Cutter head, 32 - Main drive, 33 - Shield body, 331 - Tail shield body, 332 - Front and middle shield body, 34 - Ring body, 35 - Erector, 36 - Screw conveyor, 4 - Transport vehicle, 5 - Support jig, 6 - Balance beam, 100 - Disassembly chamber, 101 - Cutter head placement area, 102 - Disassembly area. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0032] It should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description of this application, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the protection scope of this application. Specifically, in this application, the direction towards the ground is defined as "lower", and conversely, the direction away from the ground is defined as "upper". Other descriptions indicating orientation are defined based on "upper" and "lower".

[0033] In each drawing of this application, for the convenience of illustration, the sizes of some structures or parts are exaggerated relative to other structural parts. Therefore, it is only used to illustrate the basic structure of the subject matter of this application.

[0034] This application is directed to the in-tunnel disassembly of an earth pressure balance shield machine. Among them, as Figures 2 to 15As shown in the figure, the shield machine 3 mainly includes a cutter head 31, a main drive 32, a tail shield 331, a front and middle shield 332, a ring body 34, a segment erector 35, a screw conveyor 36, a connecting bridge (not shown), a trailing gantry (not shown), and other main components. The disassembly of the shield machine in the tunnel mainly involves sequentially removing the above-mentioned main components. Since the overall volume and weight of each of the above components are relatively large, some of the larger components will be further disassembled into target modules, which are disassembled one by one and transported to the launching shaft by a transport vehicle 4, and then hoisted to the ground to complete the disassembly process. Due to the limited space of the disassembly chamber 100, during the disassembly process, the disassembly tooling 1 is used in cooperation with the lifting hook 2 to lift the target module from the remaining part of the shield machine 3, and the angle or direction of the target module is adjusted during the lifting process to facilitate placing the target module on the transport vehicle 4 and transporting it to the launching shaft.

[0035] In this application, for the convenience of description and understanding, the length direction of the shield machine 3 is defined as the front and back, that is, the position of the cutter head 31 relative to the shield machine 3 is defined as the front, and the position of the trailing gantry relative to the shield machine 3 is defined as the back. The width direction of the shield machine 3 is the transverse direction.

[0036] The method for disassembling the shield machine 3 in the tunnel of this application is as Figures 7 to 15 shown. First, a disassembly chamber 100 is provided, and a disassembly tooling 1 that can slide in the front and back directions of the shield machine 3 is installed in the disassembly chamber 100; the shield machine 3 is moved to a specified position; the disassembly tooling 1 is used in cooperation with auxiliary supplies such as the lifting hook 2 and steel ropes, as Figure 1 shown, the screw conveyor 36, the segment erector 35, the tail shield 331, the ring body 34, the cutter head 31, the front and middle shield 332, and the main drive 32 are sequentially disassembled and transported to the launching shaft opening. The entire disassembly process is safe and controllable and convenient to implement.

[0037] To ensure the safety of the disassembly construction and ensure that the foundation bearing capacity in the disassembly chamber 100 meets certain requirements, therefore, before installing the disassembly tooling 1, the foundation in the disassembly chamber 100 is first treated, and the bearing capacity of the treated foundation is not less than , where \(G\) is the total gravity of the module with the largest lifting weight and the equipment in contact with this module, \(n\) is the safety factor, and \(S\) is the contact area between the equipment in contact with the target module and the ground.

[0038] For example, in the disassembly area behind the shield machine 3, is the total gravity of the disassembly tooling 1 and the module with the largest weight. In the hoisting area at the launching shaft opening, is the total gravity of the crawler crane and the module with the largest weight. The safety factor is generally selected as 1.5 to provide a foundation with a higher bearing capacity.

[0039] For the safety of the construction process, the ground in the disassembly chamber 100 needs to meet the flatness requirements. Specifically, the crosswise and longitudinal slopes of the foundation in the hoisting area at the starting wellhead do not exceed 3%, ensuring the stability and safety of the crawler crane during hoisting.

[0040] Install tracks (not shown in the figure) on the ground of the disassembly chamber 100 for the movement of the disassembly tooling. The tracks extend in the front-back direction, and the disassembly tooling 1 moves on the tracks, thereby driving the target module to separate from the remaining components of the shield machine 3. The slope of the tracks does not exceed 3‰ to avoid tilting during the hoisting of the target module, and further ensure the stability and safety of the disassembly tooling 1 during the hoisting of the target module. According to the shape of the disassembly tooling 1, the tracks are installed at positions close to the side walls of the disassembly chamber 100.

[0041] Before pushing the shield machine 3 to the designated position, embed a pair of inner rails for the movement of the shield machine and a pair of outer rails located outside the pair of inner rails on the ground of the disassembly chamber 100. Since the bottom of the shield machine 1 is arc-shaped, the inner rails and the outer rails are arranged in an arc shape transversely, making the inner rails and the outer rails lower than the tracks. Specifically, the included angle of the pair of inner rails is 25° to 27°, and the included angle of the pair of outer rails is 36° to 38°. The inner rails and the outer rails are symmetrically designed along the transverse center to meet the reception and translation of the shield machine 3. Preferably, the included angle of the pair of inner rails is 26°, and the included angle of the pair of outer rails is 37°.

[0042] Since the disassembly tooling 1 is relatively large, it is generally assembled in the disassembly chamber 10. Set 4 fixed lifting points above the arch top of the disassembly chamber in advance, with a left-right spacing of 2000 mm - 2400 mm and a front-back spacing of 2400 mm - 2800 mm; set 4 fixed lifting points on each of the left and right side walls, with a spacing of 220 - 260 mm and a front-back spacing of 2400 mm - 2800 mm. The load of each lifting point is not less than 10 t to meet the in-cave assembly of the disassembly tooling.

[0043] Specifically, as Figures 4 to 6 shown, the disassembly tooling 1 includes a main frame 10 for lifting the target module and a driving mechanism 20 for driving the main frame 10 to move. The driving mechanism 20 drives the main frame 10 and then drives the target module to move slowly, so that the target module can be separated from the remaining components of the shield machine 3.

[0044] The main frame 10 includes two columns of support columns 11 arranged horizontally, and a top frame 12 fixedly connected to the upper ends of the two columns of support columns 11. A disassembly space 13 is formed between the two columns of support columns 11 and the top frame 12. The top frame 12 includes a load-bearing beam 121 for installing a lifting hook 2. The lifting hook 2 is connected to the load-bearing beam 121 and the target module in cooperation with a lifting rope. In this application, the lifting hook 2 is generally selected as a chain block, and the specifications and quantities of the chain blocks are set according to the weight of the target module.

[0045] Among them, the distance between the two columns of support columns 11 is 10 meters to 12 meters. Preferably, the distance between the two columns of support columns 11 is 11 meters, so as to ensure that the disassembly space 13 between the two columns of support columns 11 can accommodate the shield machine 3 horizontally. When the shield machine 3 is pushed to the predetermined position, the two columns of support columns 11 are respectively located on both sides of the shield machine 3, and an operable space is reserved between the support columns 11 and the shield machine 3.

[0046] Each column of support columns 11 includes a first support column 111 and a second support column 112 arranged in the front-rear direction. The distance between the first support column 111 and the second support column 112 is 2 meters to 4 meters, so that the disassembly tool 1 can cover a larger range in the front-rear direction, facilitating the disassembly of a target module with a larger volume.

[0047] The top frame 12 includes a pair of cross beams 122 extending horizontally and a pair of inclined beams 123 fixedly connecting the cross beams 122 and the support columns 11. The arrangement of the inclined beams 123, on the one hand, can match the shapes of the disassembly chamber 100 and the shield machine 3, and on the other hand, strengthen the structural strength of the disassembly tool 1. When the target module is hoisted on the load-bearing beam 121, the inclined beams 122 can decompose the force on the load-bearing beam 121 and improve the stability of the entire hoisting process.

[0048] The included angle between the inclined beam 122 and the support column 11 is 30° to 60°. Preferably, the included angle between the inclined beam 122 and the support column 11 is 45°. At this time, the structure of the disassembly tool 1 is the most stable and conforms to the design that the top of the disassembly chamber 100 is arc-shaped.

[0049] In this application, the vertical projection length of the inclined beam 123 is not greater than half of the length of the cross beam 122, the lateral projection height of the inclined beam 123 is not greater than half of the total height of the support column 11 and the driving mechanism 20, and the size of the inclined beam 123 can ensure the structural strength and stability of the entire disassembly tool 100 within a certain dimension.

[0050] The load-bearing beam 121 includes a first load-bearing beam 1211 fixedly connecting a pair of the cross beams 122 and a second load-bearing beam 1212 fixedly connecting a pair of the inclined beams 122. Both the first load-bearing beam 1211 and the second load-bearing beam 1212 extend in the front-back direction. On the one hand, the hook 2 can be installed, and on the other hand, the stability of the disassembling worker 1 can be improved.

[0051] Preferably, there are two first load-bearing beams 1211, which are connected between a pair of the cross beams 122 at intervals in the transverse direction. The hook 2 can be hung on one or two first load-bearing beams 1211 as required.

[0052] The ratio of the distance between the two first load-bearing beams 1211 to the length of the cross beam 122 is one-third to one-half, so as to keep the balance of the whole disassembling tooling 1 during the hoisting process.

[0053] Preferably, the second load-bearing beam 1212 is fixed at the middle position of the inclined beam 123 along its length direction.

[0054] It can be understood that the lengths of the first load-bearing beam 1211 and the second load-bearing beam 1212 are also the distances between the first support column 111 and the second support column 112.

[0055] The load-bearing beam 121 further includes a third load-bearing beam 1213 fixedly connecting the two first load-bearing beams 1211. The third load-bearing beam 1213 extends in the transverse direction, and the third load-bearing beam 1213 is longer than half of the length of the cross beam 122, which can further improve the structural strength of the disassembling tooling 1, increase the positions for setting the hooks, and increase the flexibility of the shield machine 3 during the disassembly process.

[0056] The load-bearing beam 121 further includes a fourth load-bearing beam 1214 fixedly connecting every two adjacent support columns 11 in each column. On the one hand, the fourth load-bearing beam 1214 can cooperate with other load-bearing beams to hang the hook 2, and on the other hand, it can also improve the stability of the disassembling tooling 1.

[0057] The top frame 12 is a horizontal plate, which is connected to the upper ends of two columns of the support columns 11. The load-bearing beam 121 is located below the horizontal plate for hanging the hook, and it can also achieve the purpose of lifting the target module, which is also within the protection scope of this application.

[0058] The disassembling space 13 is formed among the support columns 11, the cross beam 122 and the inclined beam 123. Among them, the height of the disassembling space 13 is 8 meters to 11 meters, that is, the distance between the cross beam 122 and the bottom end of the driving mechanism 20 is 8 meters to 11 meters, so as to meet the height of the shield machine 3. Preferably, the height of the disassembling space 13 is 9.5 meters.

[0059] The main frame 10 further includes connecting beams 14 connected to two adjacent support columns 11 in each column. The connecting beams 14 are located below the fourth load-bearing beam 1214, which can further increase the structural strength of the disassembly tooling 1. In this embodiment, the connecting beams 14 are in the same extending direction as the first load-bearing beam 1211 and the second load-bearing beam 1212.

[0060] In this embodiment, the length of the connecting beam 14 is 2 meters to 4 meters. Preferably, the length of the connecting beam 14 is 3 meters, so that the disassembly tooling 1 can cover a larger range. Moreover, operators can walk on the connecting beam 14, which is convenient for operators to carry out the disassembly process.

[0061] In this application, the main frame 10 is welded by H-shaped steel, so that the entire main frame 10 has greater strength and stiffness, while reducing its own weight. Specifically, the H-shaped steel includes a web and flange plates connected to both ends of the web. The widths of the web and the flange plates are not less than 400 mm, so that the disassembly tooling 1 itself has excellent mechanical properties and load-bearing capacity.

[0062] Preferably, the main frame 10 further includes closing plates connected to the ends of the flange plates. The design of the closing plates can increase the structural stability and load-bearing capacity of the disassembly tooling 1 and prevent the H-shaped steel from being distorted when stressed. Preferably, the thickness of the closing plates is 8 mm - 12 mm.

[0063] Furthermore, the driving mechanism 20 is fixed to the support column 11 to drive the main frame 10 to move in the front-rear direction. In this embodiment, the driving mechanism 20 is fixed to the lower end of the support column 11 and moves along the track at the bottom of the disassembly chamber 100 in the front-rear direction of the track.

[0064] Specifically, the driving mechanism 20 includes wheels 21 connected to the lower end of the support column 11 and a motor for driving the wheels to move. The motor is a 6-pole 11-kW motor, so that the disassembly tooling 1 has sufficient driving force to lift the target module.

[0065] Prepare a number of shackles, towing ropes and hooks for collaborative use with the disassembly tooling 1. Among them, the specification of the shackles is not less than 55 t; the towing ropes are steel ropes, and different specifications of steel ropes can be prepared according to needs. Among them, the maximum specification of the steel ropes has a tensile strength of not less than 177 kg / mm2, and a number of 6×37 steel ropes with D = 80, whose breaking tensile force is not less than 374 t; the hooks are chain hoists, and different rated lifting weights of chain hoists can be prepared according to needs. The maximum rated lifting weight of the chain hoist is not less than 30 t, so as to achieve the purpose of installation construction during the hoisting of the target module with the maximum weight.

[0066] After the preparatory work for the disassembly chamber 100 is completed, the shield machine 3 is pushed empty into the disassembly chamber 100. Then, disconnect the connection bridge from the trailing gantry, and tow them to the launching shaft in sequence, and hoist them out of the shaft to the ground for disassembly.

[0067] Preparatory work before disassembly. For example, check the working conditions of each component of the shield machine 3 and whether the markings are complete, and clean the shield machine 3 to ensure that the functions of each component can operate normally, the entire system function is relatively complete, and it can operate normally after subsequent assembly.

[0068] Push the shield machine 3 empty to the designated position. Specifically, after receiving the shield machine 3, use the rail clamp to cooperate with the disassembly tooling 1, and use a symmetric number of sets of propulsion cylinders to push against the reaction force to support the disassembly tooling 1 to push the shield machine 3 empty to the designated position.

[0069] As Figure 7 shown, start to disassemble the screw conveyor 36. First, retract the screw shaft, close the front gate, and remove the relevant supporting components; remove the operation platform of the segment erector 35; extend the car body part of the transport vehicle 4 under the support beam of the segment erector 35; weld lifting lugs on the top and inside of the tail shield 331, hang a 30t manual chain hoist on the third load-bearing beam 1213 of the disassembly tooling 1 to pull the main lifting point behind the screw conveyor 36, adjust the angle of the screw conveyor 36 through the 20t manual chain hoist at the top lifting point of the tail shield 331, the disassembly tooling 1 walks backward slowly, pull out the screw conveyor 36, and tow it backward away from the shield body. Through the cooperation of the 30t manual chain hoist at the disassembly tooling 1, the 20t manual chain hoist at the tail shield 331 and the 5t manual chain hoist inside, slowly pull the screw conveyor 36 outwards.

[0070] Layout lifting points on the top of the segment. Hang a 20t manual chain hoist on the third load-bearing beam 1213, and cooperate with the 30t manual chain hoist at the disassembly tooling 1 and the 20t manual chain hoist at the tail shield 331 to lay the screw conveyor 36 flat, and transport it to the launching shaft on the transport vehicle.

[0071] During the process of installing the steel rope, the steel rope is in an inclined state, that is, the upper end of the steel rope is inclined backward, so that when the screw conveyor 36 is moving backward slowly, the steel rope has a pulling force on the screw conveyor 36, which is beneficial to the disassembly of the screw conveyor 36.

[0072] For the disassembly of the segment erector 35, as Figure 8As shown in the figure, first remove the suction cups of the assembling machine 35 and temporarily store them inside the tail shield body 331. First, weld four legs to the front and rear ends of the supporting beam of the assembling machine 35 with section steel to lift it up, and weld the supports on both sides to be fixed to the tail shield body 331 as a whole to enhance stability. Then disassemble the bolts of the supporting beam flange to separate the supporting beam from the H-beam. Use two groups of 20t chain hoists at the top lifting points of the tail shield body 331 to pull the lifting points in front of the supporting beam, and hang two groups of 30t chain hoists on the first load-bearing beam 1211 of the disassembly tooling 1 to pull the lifting points behind the supporting beam of the assembling machine 35. Finally, control the disassembly tooling 1 to slowly move backward, move the rotating ring and the supporting beam of the assembling machine 35 out as a whole, and slowly pull the assembling machine 35 outwards through the cooperation of the front and rear chain hoists, and place the assembling machine 35 on the transport vehicle and transport it to the launching shaft for hoisting out.

[0073] For the disassembly of the tail shield body 331, as Figure 9 shown, first disassemble the tail shield body 331 into the e1 module, the e2 module and the e3 module, and disassemble the tail shield body in the order of the e1 module, the e3 module and the e2 module.

[0074] Specifically, weld positioning pins, positioning seats and lifting lugs on the e1 module, and the positions of the lifting lugs are appropriately adjusted according to the actual working conditions. Hang two groups of 30t chain hoists on the first load-bearing beam 1211 and the second load-bearing beam 1212 of the disassembly tooling 1 to pull the e1 module, and then cut the e1 module; move the disassembly tooling 1 and place the e1 module on the ground of the disassembly chamber 100 through the chain hoist, install the balance beam, lift the e1 module again and adjust the angle so that the e1 module falls on the transport vehicle.

[0075] The hoisting process of the e3 module is the same as that of the e1 module and will not be elaborated here.

[0076] Before disassembling the e2 module, first place the suction cups of the assembling machine 35 on the transport vehicle for transportation. Hang a group of 30t chain hoists on the third load-bearing beam 1213 to pull the e2 module, and then disassemble the e2 module in the same way as disassembling the e1 module.

[0077] The ring body 34 includes the d1 module, the d2 module, the d3 module and the H-beam. The disassembly of the ring body 34 is to disassemble the d1 module, the d2 module, the H-beam and the d3 module in sequence.

[0078] As Figure 10 and Figure 11As shown in the figure, welding positioning pins, positioning seats and lifting lugs on the d1 module, and the positions of the lifting lugs are adjusted appropriately according to the actual working conditions; removing the articulated cylinder connecting pin and the articulated cylinder; hanging 2 rows of chain hoists on the first load-bearing beam 1211 and the second load-bearing beam 1212 of the disassembly tooling 1, with 2 groups of 30t chain hoists in each row, pulling the d1 module, and then cutting the d1 module; removing the articulated seal, moving the disassembly tooling 1 and placing the d1 module on the ground of the disassembly chamber 100 through the chain hoist, installing the crossbeam 6, lifting the d1 module again and adjusting the angle so that the d1 module falls on the transport vehicle.

[0079] The methods of removing the d2 module, the H beam and the d3 module are the same as those of removing the d1 module. Just when removing the H beam, first place the square timbers for supporting the H beam on the ground, then temporarily place the H beam on the square timbers, and then lift it again and adjust the angle.

[0080] After removing the above modules, as Figure 12 shown, then translate the front and middle shield 332. The front and middle shield 332 drives the cutter head 31 to move backward to reserve space for disassembling the cutter head 31 in the front, which is convenient for disassembling the cutter head 31.

[0081] Specifically, the translation of the front and middle shield 332 is as follows: Using the rail clamp in cooperation with the disassembly tooling 1, the shield machine 3 is translated to the established position by the way of jacking the disassembly tooling 1 with the external jack reaction force. A cutter head placement area 101 is reserved in the front of the front and middle shield 332 to place the cutter head 31, and a disassembly area 102 is reserved in the rear of the front and middle shield 332 to disassemble the front and middle shield 332. Preferably, the front and rear distance of the cutter head placement area 101 is at least 6520mm to meet the temporary storage of the cutter head module, and the front and rear distance of the disassembly area 102 is at least 7880mm to meet the loading of the front and middle shield 332 module and the rolling and turning of the main drive 32 on the ground.

[0082] The cutter head 31 includes an a1 module at the upper part, an a2 module at the lower part and an a3 module in the middle. The disassembly of the cutter head 31 is carried out in the order of disassembling the a1 module, the a2 module and the a3 module in sequence.

[0083] As Figure 13 and Figure 15 shown, specifically, the disassembly of the a1 module is as follows: Welding lifting lugs, positioning pins and positioning seats on the a1 module; the disassembly tooling 1 moves forward to the cutter head placement area 101, hanging 2 groups of 30t chain hoists on the first load-bearing beam 1211 of the disassembly tooling 1, pulling the a1 module, removing the weld between the a1 module and the a3 module, and removing the connecting bolts; removing the a1 module, building a support jig 5 in the cutter head placement area 101, and temporarily placing the a1 module on the support jig. During the process of disassembling the a2 module, it is necessary to remove the weld between the a2 module and the a3 module, and temporarily place the a2 module on the support jig 5 in the cutter head placement area 101.

[0084] Since the a3 module is the heaviest module of the shield machine, when disassembling the a3 module, 4 sets of 30t chain hoists are hung on the first load-bearing beam 1211 and the second load-bearing beam 1212 of the disassembly tooling 1. Similarly, the a3 module is temporarily placed on the support jig 5 in the cutter head placement area 101.

[0085] The front middle shield 332 is divided into a c1 module located above the main drive 32, c2 and c3 modules located on both sides of the main drive 32, and a c4 module located below the main drive 32. Disassembling the front middle shield 332 and the main drive 32 is to disassemble the c1 module, c2 module, c3 module, main drive 32, and c4 module in sequence.

[0086] As Figure 14 and Figure 15 shown, before removing the c1 module, first remove the manhole; weld lifting lugs, positioning pins, and positioning seats on the c1 module; hang 2 rows of 30t chain hoists on the upper beam of the first load-bearing beam 1211 of the disassembly tooling 1, with 2 sets in each row, to hold the c1 module, and remove the connecting bolts; move the disassembly tooling 1 and place the c1 module on the ground in the disassembly area 101 through the chain hoists, then use the balance beam 6 to lift the c1 module again and adjust the angle, and place the c1 module on the transport vehicle and transport it to the launch shaft.

[0087] When disassembling the c2 and c3 modules, a relatively large angle needs to be adjusted. The chain hoists are set on the first load-bearing beam 1211, the second load-bearing beam 1212, and the fourth load-bearing beam 1214 of the disassembly tooling 1. The c2 and c3 modules are disassembled in sequence according to the method of disassembling the c1 module and transported to the launch shaft.

[0088] To disassemble the main drive 32, first install the main drive lifting lugs, hang 4 sets of 30t chain hoists on the first load-bearing beam 1211, lift the main drive 32 by the 4 sets of 30t chain hoists, move the disassembly tooling 1 backward and install a turning frame at the bottom; cooperate the horizontal movement of the disassembly tooling 1 with the lifting and lowering of the chain hoists to turn the main drive 32 to the horizontal; remove the center slewing, and transport it to the launch shaft opening for hoisting by a transport vehicle; then change the layout form of the 30t chain hoists at the disassembly tooling 1 to be arranged in 2 rows, with 2 sets in each row, replace the main drive lifting lugs, and lift the main drive 32 horizontally to the transport vehicle by the 4 sets of 30t chain hoists.

[0089] During the turning process of the above-mentioned main drive 32, in order to ensure the stability during the hoisting process and avoid the situation of the main drive being dragged, control the deflection angle of the towing rope not to be greater than 11°, so as to control the horizontal force within the safe range and ensure the safety during the construction process.

[0090] Then disassemble the c4 module according to the method of disassembling the c1 module and transport it to the launch shaft.

[0091] Next, the cutter head 31 will be transported to the launching shaft. In the order from near to far from the launching shaft, first transport the a3 module, then transport the a2 module, and finally transport the a1 module.

[0092] Specifically, hang 4 groups of 30t chain hoists on the first load-bearing beam 1211 and the second load-bearing beam 1212. Through the cooperation of the horizontal movement of the disassembly tooling 1 and the lifting of the chain hoist, turn the a3 module to the horizontal. During the turning process of the a3 module, control the deflection angle of the towing rope not to be greater than 11°; replace the chain hoist to the first load-bearing beam 1211 and arrange it in a 2*2 pattern, replace the lifting lugs of the a3 module, install the balance beam 6, lift the a3 module and adjust its posture so that the a3 module falls on the transport vehicle.

[0093] Use the disassembly tooling 1 to lift and adjust the angles of the a2 module and the a1 module in sequence, and then place them horizontally on the transport vehicle and transport them to the launching shaft.

[0094] Before transporting the above-mentioned modules with larger volumes, first conduct simulated transportation on each target module to confirm the safety distance reserved between the target module and the inner wall of the disassembly chamber 100. Among them, the target modules with larger volumes include the screw conveyor 36, the segment erector 35, the main drive 32, and the cutter head a3 module. During transportation, ensure that the distance between the target module and the inner wall of the disassembly chamber 100 is not less than 1m.

[0095] In summary, for the method of disassembling the shield machine in the tunnel of the present application, by using the disassembly tooling 1 and the lifting hook, the shield machine 3 is disassembled one by one and transported to the launching shaft opening by the transport vehicle. The process is safe and controllable and convenient to implement.

[0096] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0097] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the technical spirit of the present application should be included in the protection scope of the present application.

Claims

1. A method for disassembling a shield machine inside a tunnel, which is applicable to the disassembly of an earth pressure balance shield machine inside a tunnel, is characterized in that, The disassembly method comprises: A dismantling chamber is provided, in which a dismantling tool that can slide along the front-rear direction of the shield machine is installed, and the dismantling tool forms a dismantling space; Move the shield machine to a designated position, wherein the module to be disassembled of the shield machine is located in the disassembly space; Disassemble and transport the screw machine, assembly machine, tail shield body and ring body in sequence; The front middle shield body is translated backward to a predetermined position, wherein a knife disc placement area is reserved on the front side of the front middle shield body for placing the knife disc, and a disassembly area is reserved on the rear side of the front middle shield body for disassembling the front middle shield body; gradually disassembling the cutter disc and placing it in the cutter disc placement area; gradually dismantling and transporting the front middle shield and the main drive; Transport the cutterhead to the starting wellhead.

2. The method for disassembling a shield machine in a tunnel according to claim 1, wherein, The cutter disc comprises an A1 module, an A2 module and an A3 module. Before the cutter disc is gradually disassembled and placed in the cutter disc placement area, a support frame for supporting the A1 module, the A2 module and the A3 module respectively is first arranged in the cutter disc placement area.

3. The in-tunnel disassembly method of the shield machine according to claim 1, characterized in that, The front middle shield body includes C1 module, C2 module, C3 module and C4 module. The above-mentioned stepwise disassembly and transportation of the front middle shield body and the main drive are specifically as follows: first disassembly the C1 module, C2 module and C3 module, then disassembly the main drive, and finally disassembly the C4 module.

4. The method for disassembling a shield machine in a tunnel according to claim 3, characterized in that, To disassemble the main drive, first install a turning frame at the bottom of the dismantling tooling, and the dismantling tooling moves horizontally in coordination with the lifting of the hand chain hoist to turn the main drive over to a horizontal level.

5. The method for disassembling a shield machine in a tunnel according to claim 1, characterized in that, When the angle of the target module needs to be adjusted during the lifting process, a shoulder pole beam is first installed on the dismantling tooling, and the target module is adjusted in angle by the shoulder pole beam and placed on the transport vehicle.

6. The method for disassembling a shield machine in a tunnel according to claim 1, wherein During the lifting and flipping process of the target module, the deflection angle of the traction rope is no more than 11°.

7. The method for disassembling a shield machine in a tunnel according to any one of claims 1 to 6, characterized in that, Before installing the disassembly tooling in the disassembly chamber, first treat the foundation in the disassembly chamber, and the bearing capacity of the treated foundation shall not be less than , is the total gravity of the hoisting target module and the equipment in contact with the target module, n is the safety factor, and S is the contact area between the equipment in contact with the target module and the ground.

8. The method for disassembling a shield machine in a tunnel according to any one of claims 1 to 6, characterized in that, Before installing the dismantling tool in the dismantling cave, a track for sliding the dismantling tool is installed in the dismantling cave, and the slope of the track does not exceed 3‰.

9. The method for disassembling a shield machine in a tunnel according to any one of claims 1 to 6, characterized in that, Before pushing the shield machine to the designated position, a pair of inner rails for the shield machine to move and a pair of outer rails located outside the pair of inner rails are pre-buried on the ground of the dismantled cavern. The included angle of the pair of inner rails is 25° to 27°, and the included angle of the pair of outer rails is 36° to 38°.

10. The method for disassembling a shield machine in a tunnel according to any one of claims 1 to 6, characterized in that, Before transporting each target module, simulated transportation is performed on each target module, and a safe distance is reserved between the target module and the inner wall of the disassembly cave.

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