Shield machine disassembling and hoisting construction method in narrow space of station with arch cover method

Abstract

The application discloses a kind of arch cover method station narrow space shield machine disassembly hoisting construction method, to solve the technical problem that existing technology cannot be applicable to arch cover method station narrow space shield machine hoisting.The specific steps are (1) in the process of station secondary lining construction, pre-embedded lifting ring is set at the top of secondary lining buckle arch, to facilitate the hoisting work after shield disassembly;(2) according to the order of easy first, small first, from back to front, from top to bottom, from inside to outside, shield disassembly is carried out;(3) each mechanism after disassembly is transported to the starting shaft according to disassembly order and hoisted out of ground for storage;(4) important parts are avoided when shield body and cutterhead are disassembled, shield machine parts after hoisted out of ground are transported back to processing plant for assembly, which can be reused.Through the order of difficult first, small first, from back to front, from top to bottom, from inside to outside, shield disassembly is carried out, and important parts are avoided, to realize the hoisting of shield in narrow space and the reuse of shield machine.

Description

[0001] This invention relates to the field of tunnel boring machine (TBM) construction technology, specifically to a method for dismantling and hoisting a TBM in the confined space of an arch-type railway station. Background Technology

[0002] With economic and social development, my country's urban rail transit construction is expanding, leading to increasing construction difficulties and a correspondingly larger market for equipment. However, this also brings with it challenges. Due to limitations imposed by ground conditions at some shield tunneling receiving stations and the spatial constraints of underground stations, shield tunneling machines cannot be dismantled in the receiving shaft using conventional methods after reception. Furthermore, there are few domestic and international examples of reusable shield dismantling; most methods involve demolition or shell disposal, which damage the shield machine itself and prevent its reuse.

[0003] Chinese invention patent application No. 201710025584.1 discloses a construction method for dismantling a tunnel boring machine (TBM) inside a tunnel. The main steps are: (1) installation of the lifting beam; (2) preparation of the transportation device; (3) entry of the transportation device into the tunnel boring machine; (4) dismantling and hoisting of the cutterhead; (5) dismantling and hoisting of the upper part of the shield body; (6) dismantling and hoisting of the screw conveyor; (7) installation of the main drive tilting bracket; (8) dismantling and hoisting of the cutterhead motor, reducer, propulsion cylinder and personnel compartment; (9) dismantling and hoisting of the main drive of the TBM; (10) dismantling of the assembly machine; (11) dismantling and hoisting of the shaft support and cantilever beam; (12) dismantling and hoisting of the remaining lower part of the shield body; (13) hoisting of the assembly machine; (14) separation and transfer of the trolley and spare parts.

[0004] However, the above methods have at least the following technical problems in actual construction:

[0005] ① In the arch-type station, the space of the shield receiving shaft is relatively small. The existing technologies mentioned above cannot complete the shield machine receiving construction in one go, and cannot smoothly solve the technical problems of receiving the shield in stages and the final shield tail exiting the tunnel.

[0006] ② Existing methods mostly involve dismantling or dismantling the shield body, which often damages the shield structure during the dismantling process, making it impossible to restore and reuse the shield machine in the later stages, resulting in high costs.

[0007] The information disclosed in this background section is intended only to enhance the understanding of the background technology of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0008] The inventors discovered through research that the space inside the shield tunneling starting shaft of the arched tunneling station is relatively small, and the existing shield machine hoisting construction methods cannot be applied to such a small space. Furthermore, the existing methods will cause certain damage to the shield machine itself, making it impossible to reuse it twice or multiple times, thus increasing construction costs.

[0009] In view of at least one of the above technical problems, this disclosure provides a method for dismantling and hoisting a tunnel boring machine (TBM) in a confined space in a station using the arch-type method. By dismantling the TBM in a certain order and avoiding important parts of the shield body and cutterhead, not only can the dismantling and hoisting of the TBM in a confined space be completed, but the TBM can also be reused, thereby reducing the cost of TBM construction.

[0010] According to one aspect of this disclosure, a method for dismantling and hoisting a tunnel boring machine in a confined space within an arch-type railway station is provided, comprising the following steps:

[0011] (1) During the construction of the secondary lining of the station, a pre-embedded lifting ring is set at the top of the secondary lining arch to facilitate the hoisting work after the shield is dismantled;

[0012] (2) The shield is dismantled in the order of easy to difficult, small to large, back to front, top to bottom, and inside to outside, so that the shield body is dismantled in enough detail to meet the narrow space in the arch cover method station. The specific dismantling order is as follows: first, remove the towing cylinder, then disconnect each pipeline and remove the connection of each component, and then dismantle the shield body one by one in the order of trailer → equipment bridge → screw conveyor → segment assembly machine → cutter head dismantling → propulsion, articulated cylinder, and man cabin dismantling → shield tail D ring segment dismantling → motor and reducer dismantling → cross beam dismantling → shield body platform → middle shield C ring dismantling → middle shield B ring dismantling → main drive → front shield A ring dismantling → cutter head transportation.

[0013] (3) When disassembling the shield body and cutterhead, avoid important parts to facilitate the later recovery of the shield; transport each component after detailed disassembly to the starting shaft and hoist it to the ground for storage in the order of disassembly.

[0014] (4) The parts of the tunnel boring machine after being lifted out of the ground are transported back to the processing plant for assembly, so that they can be reused.

[0015] In some embodiments of this disclosure, due to the limited space in the transport channel, the disassembly and transport of the front shield A ring, middle shield B ring, middle shield C ring and shield tail D ring shield bodies all require the use of a mobile chain hoist to lift and place them on a transport vehicle when lifting the current component, and then securely tie them before transporting them out.

[0016] In some embodiments of this disclosure, the equipment bridge and trailers No. 1 and No. 2 are towed out as a whole, while the other trailers are disassembled and towed out to increase safety during transportation.

[0017] The equipment bridge is connected to the transport vehicle via a support frame to ensure its stability;

[0018] The left and right uprights of the trailer are connected together using structural steel, the trailer is placed on a dump truck and transported out of the hole, and the trailer is fixed to the dump truck with structural steel to prevent the trailer from swaying from side to side.

[0019] In some embodiments of this disclosure, when conveying the screw conveyor, the hydraulic pipelines and electrical lines are first removed, and then the I-beam gantry frame is used in conjunction with the front lifting point and the gantry frame lifting point for dismantling.

[0020] Once the front and rear lifting points are selected, a 20T chain hoist is used to hang the screw conveyor on the front and rear lifting points to slowly and steadily place the screw conveyor on the transport vehicle, and then weld it in place. The transport vehicle then transports the screw conveyor to the tunnel shaft entrance and hoists it to the ground.

[0021] In some embodiments of this disclosure, the segment installation machine and its traveling beam are dismantled and then installed on a transport vehicle for transport. A steel support frame is welded onto the transport vehicle to support the segment installation machine and the traveling beam. The steel support frame is fabricated on-site according to the height dimensions between the transport vehicle and the segment installation machine and the traveling beam.

[0022] In some embodiments of this disclosure, the propulsion cylinder, articulated cylinder, stabilizer, axial positioning block, valve block, electrical components, and ball valve are dismantled using a chain hoist in a top-to-bottom and left-to-right order, and then transported to the launch well and hoisted to the surface using a transport vehicle.

[0023] When removing the propulsion cylinder, weld lifting points on the D-ring of the shield tail, use flat slings to secure the propulsion cylinder, loosen the connecting bolts between the cylinder clamp and the shield body, and use a chain hoist to pull the propulsion cylinder backward to complete the removal.

[0024] When dismantling the personnel cabin, four chain hoists are used to hang the hydraulic cylinder mounting base at the rear of the B ring of the central shield as lifting points to complete the dismantling.

[0025] In some embodiments of this disclosure, the shield tail D-ring is divided into four parts: upper, left middle, right middle, and lower. The cutting seams are staggered from the grouting pipe and grease injection pipe of the shield tail D-ring. Before cutting, a cylindrical anti-deformation support is made of steel pipe. Flange positioning plates are welded near the cutting line to facilitate hoisting. The number of flange positioning plates is 4 sets, which are evenly arranged on the outside of the shield tail D-ring to reduce the impact caused by the excessive length of the shield tail D-ring.

[0026] The middle shield C ring, middle shield B ring and front shield A ring are divided into upper and lower parts for cutting. The cutting seam is staggered from the installation position of the hinge cylinder of the middle shield C ring and middle shield B ring. Before cutting, the cylinder anti-deformation support is made with steel pipe. The anti-deformation support of the front shield A ring is set on the soil chamber side.

[0027] In some embodiments of this disclosure, when dismantling the drive motor and reducer, lifting lugs are welded onto the drive motor and reducer to facilitate the use of chain hoists to hook the drive motor and reducer. The connecting bolts between the shield body and the drive motor and reducer are removed, and the drive motor and reducer are secured with slings to prevent displacement during dismantling.

[0028] In some embodiments of this disclosure, when dismantling the cross beam, lifting lugs are welded onto the cross beam, and lifting points are pre-embedded at the rear and top of the central shield. After the cross beam is pre-tightened using a chain hoist, the connecting bolts between the cross beam and the central shield are removed, and the beam is hoisted onto a transport vehicle for removal.

[0029] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0030] 1. This application describes the shield dismantling process in the order of easy to difficult, small to large, back to front, top to bottom, and inside to outside, which enables shield dismantling and hoisting construction in the narrow space of an arched station.

[0031] 2. This application avoids critical parts of the shield body and cutterhead during the shield dismantling process, thus ensuring the integrity of the shield body and cutterhead and enabling the shield machine to be reused multiple times. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the cutter head splitting in one embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the shield dismantling area division in one embodiment of this application.

[0034] Figure 3 This is a schematic diagram of the separation of the equipment bridge trailer in one embodiment of this application.

[0035] Figure 4 This is a schematic diagram of the separation of the equipment bridge support in one embodiment of this application.

[0036] Figure 5 This is a schematic diagram of trailer support transportation in one embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the lifting point setup for dismantling the screw conveyor in one embodiment of this application.

[0038] Figure 7This is a schematic diagram of a screw conveyor transport in one embodiment of this application.

[0039] Figure 8 This is one of the schematic diagrams for dismantling and transporting the segment installation machine in one embodiment of this application.

[0040] Figure 9 This is the second schematic diagram of the dismantling and transportation of the segment installation machine in one embodiment of this application.

[0041] Figure 10 This is a schematic diagram of the removal of the propulsion cylinder in one embodiment of this application.

[0042] Figure 11 This is a schematic diagram of the removal of the human cabin in one embodiment of this application.

[0043] In the above figures, 1 is the cutterhead, 2 is the cutter, 3 is the cutting line, 4 is the front shield A ring, 5 is the middle shield B ring, 6 is the middle shield C ring, 7 is the shield tail D ring, 8 is the front shield, 9 is the shield tail, 10 is the segment installation machine, 11 is the equipment bridge, 12 is the steel support, 13 is the transport vehicle, 14 is the tunnel segment, 15 is the main drive, 16 is the trailer, 17 is the muck transport vehicle, 18 is the lifting point one, 19 is the lifting point two, 20 is the lifting point three, 21 is the screw conveyor, 22 is the hydraulic cylinder lifting point, and 23 is the cabin lifting point. Detailed Implementation

[0044] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "vertical," "horizontal," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., used in this application are used to distinguish the described objects and do not have any sequential or technical meaning. And the terms "connection" and "linkage," unless otherwise specified, include both direct and indirect connections (linkages).

[0045] Unless otherwise specified, the unit modules (components, structures, mechanisms) or sensors involved in the following embodiments are all conventional commercially available products.

[0046] This application provides a method for dismantling and hoisting a tunnel boring machine (TBM) in the confined space of an arched tunneling station. This method solves the technical problems that existing technologies cannot meet the hoisting requirements of TBMs in the confined space of arched tunneling stations, and that existing methods for dismantling TBMs easily damage the shield and cutterhead, preventing the TBM from being reused multiple times.

[0047] The technical solution in this application embodiment is to solve the problem of hoisting a tunnel boring machine in a confined space, and the overall approach is as follows:

[0048] By dismantling the tunnel boring machine (TBM) in the order of easy to difficult, small to large, back to front, top to bottom, and inside to outside, and avoiding important parts of the shield body and cutterhead during the dismantling process, the dismantling and hoisting of the TBM in a confined space can be completed.

[0049] The specific dismantling sequence of the aforementioned tunnel boring machine (TBM) is as follows: first, remove the towing cylinders; then, disconnect all pipelines and dismantle the connections of each component; then, dismantle the following components one by one in the following order: trailer → equipment bridge → screw conveyor → segment assembly machine → cutterhead dismantling (temporarily stored aside) → propulsion, articulated cylinders, and personnel compartment dismantling → tail shield D-ring segment dismantling → motor and reducer dismantling → cross beam dismantling → shield platform → middle shield C-ring dismantling → middle shield B-ring dismantling → main drive → front shield A-ring dismantling → cutterhead transportation. During the dismantling process, important parts of the shield and cutterhead are avoided, thus effectively solving the technical problem that existing technologies cannot perform TBM hoisting in confined spaces.

[0050] To better understand the technical solution of this application, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] This example discloses a method for dismantling and hoisting a tunnel boring machine in a confined space within an arch-type railway station, including the following steps:

[0052] (1) During the construction of the secondary lining of the station, five rows of 25 pre-embedded lifting rings with a spacing of 1.5m are set on the top of the secondary lining arch. The pre-embedded lifting rings are welded and fixed to the internal steel bars of the secondary lining so as to facilitate the lifting of the shield body by using the pre-embedded lifting rings as lifting points after the shield is dismantled.

[0053] (2) The shield tunneling machine is dismantled in the order of easy to difficult, small to large, back to front, top to bottom, and inside to outside. The specific dismantling order is as follows: first, remove the towing cylinder, then disconnect each pipeline and remove the connection of each component, and then dismantle the shield tunneling machine one by one in the following order: trailer → equipment bridge → screw conveyor → segment assembly machine → cutterhead dismantling (temporarily stored aside) → propulsion, articulated cylinder, and manhole dismantling → shield tail D ring segment dismantling → motor and reducer dismantling → cross beam dismantling → shield platform → middle shield C ring dismantling → middle shield B ring dismantling → main drive → front shield A ring dismantling → cutterhead transportation.

[0054] like Figure 1 As shown, due to the size limitations of the receiving site and the need for the dismantling sequence, the cutterhead needs to be dismantled in sections first. A cutting line is set along the bolt flange connection position of the cutterhead, and the cutters are separated along the cutting line. The dismantled cutterhead and cutters are then transported to the front of the receiving site steps to facilitate the dismantling of the shield. After the shield is dismantled, the cutterhead is transported in sections.

[0055] The cutterhead and shield of the tunnel boring machine are both integral. Figure 2 As shown, a front shield A ring is installed at the front shield of the tunnel boring machine, and a tail shield D ring is installed at the tail shield. A middle shield B ring and a middle shield C ring are installed between the front shield and the tail shield. That is, the shield body is divided into front shield A ring, middle shield B ring, middle shield C ring, and tail shield D ring. The front shield A ring and the middle shield B ring are connected by annular flange bolts, the middle shield B ring and the middle shield C ring are connected by a plug-in shaft, and the middle shield C ring and the tail shield D ring are connected by annular flange bolts. Due to the limitations of the transport channel size, the disassembly and transport of the shield body, including the front shield A ring, middle shield B ring, middle shield C ring, and tail shield D ring, must be carried out during hoisting using a mobile chain hoist, placed on a transport vehicle, rotated horizontally 90 degrees, and then securely fastened before being transported out of the tunnel.

[0056] Because the complete assembly length of the equipment axle and trailers 1 and 2 is too long to be disassembled, the equipment axle and trailers 1 and 2 must be towed out as a whole. Figure 3 and Figure 4 As shown, other trailers are separated from the equipment axle and disassembled and towed out to increase safety during transportation. The equipment axle is connected to the transport vehicle via a support frame to ensure its stability; the support frame is a steel bracket. Figure 5 As shown, when the trailer separates and reverses, attention should be paid to maintaining the balance of forces on the left and right sides and the stability of the trailer frame. The specific method is as follows: use steel brackets to connect the left and right sides of the trailer into a whole. When the dump truck transports the trailer, it should be placed in the center of the dump truck to ensure that the forces on the left and right sides are even. The bottom of the trailer is fixed to the dump truck with steel to prevent left and right swaying.

[0057] When transporting the screw conveyor, first remove the hydraulic lines, electrical cables, connecting bolts, and other connecting components, then use the I-beam gantry frame in conjunction with the front lifting points and the gantry frame lifting points for dismantling; for example Figure 6 As shown, after selecting the front and rear lifting points, three 20T chain hoists are used to hang the screw conveyor on the front and rear lifting points to slowly and steadily place the screw conveyor onto the transport vehicle. Lifting points two and three simultaneously and slowly pull the screw conveyor outwards. Lifting point one, in conjunction with lifting points two and three, lifts and secures the head of the screw conveyor during lifting to prevent swaying. After the screw conveyor is fully pulled out, lifting point one is used to lay it flat on the segment transport vehicle and weld it in place using structural steel. Figure 7 As shown, the transport vehicle transports the screw conveyor to the tunnel entrance and hoists it to the ground.

[0058] like Figure 8 and Figure 9As shown, after the segment installation machine and its traveling beam are disassembled, they are installed on a transport vehicle and transported out. A steel support frame is welded onto the transport vehicle to support the segment installation machine and the traveling beam. The steel support frame is fabricated on-site according to the height dimensions between the transport vehicle and the segment installation machine and the traveling beam. The connecting bolts between the assembly machine's traveling beam and the crossbeam are then removed, and the transport vehicle directly transports the assembly machine and the traveling beam backwards.

[0059] Following a top-to-bottom, left-to-right sequence, use a chain hoist to remove the 22 propulsion cylinders, 12 articulated cylinders, 4 stabilizers, 1 axial positioning block, valve block, electrical components, and ball valves. Then, use a transport vehicle to move them to the launching well and lift them to the surface. Figure 10 As shown, when dismantling the propulsion cylinder, weld the cylinder lifting point to the D-ring of the shield tail, use a flat sling to secure the propulsion cylinder, loosen the connecting bolts between the cylinder clamp and the shield body, and use another chain hoist to pull the propulsion cylinder backward to complete the dismantling; as shown Figure 11 As shown, when dismantling the man cabin, four chain hoists are used to hang the man cabin from the hinged hydraulic cylinder mounting base at the rear of the B ring of the central shield as lifting points to complete the dismantling.

[0060] The tail ring D is divided into four parts: upper, left middle, right middle, and lower. The cutting seams are staggered from the grouting pipes and grease injection pipes of the tail ring D. Before cutting, a cylindrical anti-deformation support is made with steel pipes. Flange positioning plates are welded near the cutting line to facilitate hoisting. Four sets of flange positioning plates are evenly distributed on the outside of the tail ring D to reduce the impact caused by the excessive length of the tail ring D. The middle shield ring C, middle shield ring B, and front shield ring A are divided into upper and lower parts and cut. The cutting seams are staggered from the installation positions of the hinged hydraulic cylinders of the middle shield ring C and middle shield ring B. Before cutting, a cylindrical anti-deformation support is made with steel pipes. The anti-deformation support of the front shield ring A is set on the soil chamber side.

[0061] When dismantling the drive motor and reducer, welding lugs are made to the drive motor and reducer to facilitate the use of chain hoists to attach the drive motor and reducer. The connecting bolts between the shield body and the drive motor and reducer are removed, and the drive motor and reducer are secured with slings to prevent displacement during dismantling.

[0062] When dismantling the cross beam, welding lugs are welded onto the cross beam, and lifting points are pre-embedded at the rear and top of the central shield. After the cross beam is pre-tightened using a chain hoist, the connecting bolts between the cross beam and the central shield are removed, and the beam is hoisted onto a transport vehicle for removal.

[0063] (3) The disassembled components are transported to the starting well and hoisted out of the ground for storage in the order of disassembly.

[0064] (4) When disassembling the shield body and cutterhead, avoid important parts. After the shield machine parts are lifted out of the ground, they are transported back to the processing plant for assembly and can be reused.

[0065] Although some preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of protection of this application.

[0066] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of the invention. Therefore, this application also intends to include such modifications and variations if they fall within the scope of the claims of this application and their equivalents.

Claims

1. A method for disassembling and hoisting a shield tunneling machine in a narrow space of a station under an arch cover, characterized in that, The method comprises the following steps: (1) During the construction of the second lining of the station, a pre-buried lifting ring is arranged at the top of the second lining arch to facilitate the lifting of the shield after disassembly; (2) The shield is disassembled in the order of easy first, small first, from back to front, from top to bottom, and from inside to outside, so that the shield is disassembled finely enough to fit in the narrow space in the station, and the specific disassembly order is: first, remove the oil cylinder, then disconnect the pipelines, remove the connecting parts, and then disassemble in the order of trailer, equipment bridge, screw conveyor, segment assembling machine, cutter head, propulsion, articulated oil cylinder, personnel cabin, shield tail D ring, motor, speed reducer, meter beam, shield platform, middle shield C ring, middle shield B ring, main drive, front shield A ring, and cutter head transportation; (3) The shield tail D ring is divided into upper, left middle, right middle and lower parts for cutting, the cutting seams are staggered with the grouting pipes and grease injection pipes of the shield tail D ring, and steel pipes are used to make cylinder anti-deformation supports before cutting, and flange positioning plates are welded near the cutting line to facilitate lifting; the number of flange positioning plates is 4 sets, which are evenly arranged on the outside of the shield tail D ring to reduce the impact of the excessive length of the shield tail D ring; The middle shield C ring, the middle shield B ring and the front shield A ring are divided into upper and lower parts for cutting, the cutting seams are staggered with the articulated oil cylinder installation positions of the middle shield C ring and the middle shield B ring, and steel pipes are used to make cylinder anti-deformation supports before cutting; the anti-deformation supports of the front shield A ring are arranged on the soil side; (4) Important parts are avoided during disassembly of the shield and cutter head to facilitate recovery of the shield later; after fine disassembly, each mechanism is transported to the starting shaft according to the disassembly order and lifted out of the ground for storage; (5) The shield machine parts lifted out of the ground are transported back to the processing plant for assembly, which can realize reuse.

2. The method according to claim 1, wherein the method is characterized by, In the step (2), due to the limitation of the narrow space of the transportation channel, the front shield A ring, the middle shield B ring, the middle shield C ring and the shield tail D ring body need to be placed on the transport vehicle and transported out by using mobile chain hoists when the current part is lifted.

3. The method of claim 1, wherein the method further comprises: In the step (2), the equipment bridge and the No. 1 trailer and the No. 2 trailer in the trailer are dragged out as a whole, and the other trailers are disassembled and dragged out to increase safety during transportation; The equipment bridge is connected to the transport vehicle through a support frame to ensure the stability of the equipment bridge; The left and right columns of the trailer are connected together using profiled steel, the trailer is placed on the muck transport vehicle and transported out of the tunnel, and the trailer is fixed on the muck transport vehicle by profiled steel to prevent the trailer from shaking left and right.

4. The method of claim 1, wherein the method further comprises: In the step (2), when the screw conveyor is transported, the hydraulic pipeline and the electrical pipeline are removed first, and then the screw conveyor is removed using an I-beam door frame in cooperation with the front lifting point and the door frame lifting point; After the front and rear lifting points are selected, a 20T inverted chain is hung on the front and rear lifting points of the screw conveyor to slowly and smoothly place the screw conveyor on the transport vehicle, and the screw conveyor is welded and fixed, and then the transport vehicle transports the screw conveyor to the tunnel shaft, and lifts it to the ground.

5. The method of claim 1, wherein the method further comprises: In the step (2), the pipe segment erector and its walking beam are removed and installed on the transport vehicle, a welded steel support frame is welded on the transport vehicle for supporting the pipe segment erector and the walking beam, and the steel support frame is made on site according to the height dimension between the transport vehicle and the pipe segment erector and the walking beam.

6. The method of claim 1, wherein the method further comprises: In the step (2), the advancing cylinder, the articulated cylinder, the stabilizer, the axial positioning block, the valve block, the electrical components and the ball valve are removed in the order from top to bottom and from left to right using the chain hoist and are hoisted to the ground by the transport vehicle from the starting shaft; When the advancing cylinder is removed, a lifting point is welded on the shield tail D ring, the advancing cylinder is bound with the flat lifting belt, the connecting bolts between the cylinder clamp and the shield body are opened, the advancing cylinder is pulled backward using the chain hoist, and the removal is completed; When the personnel cabin is removed, four chain hoists are hung on the articulated cylinder mounting seat at the rear of the middle shield B ring as the lifting point, and the removal is completed.

7. The method of claim 1, wherein the method further comprises: In the step (2), when the motor and the speed reducer are removed, lifting lugs are welded on the motor and the speed reducer to facilitate the hanging of the motor and the speed reducer using the chain hoist, the connecting bolts between the shield body and the driving motor and the speed reducer are removed, and the motor and the speed reducer are bound and fixed using the lifting belt to avoid displacement during the removal.

8. The method of claim 1, wherein the method further comprises: In the step (2), when the cross beam is removed, lifting lugs are welded on the cross beam, lifting points are embedded in the rear and top of the middle shield, the cross beam is pre-tightened using the chain hoist, the connecting bolts between the cross beam and the middle shield are removed, and the cross beam is hoisted to the transport vehicle for transportation.

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