Rapid assembly and split launching method for shield tunneling machine in narrow space

Abstract

The invention discloses a rapid assembly and split launching method for a shield tunneling machine in a narrow space, which comprises the following steps of: excavating launching holes in two sides of a launching shaft by adopting a mining method, pouring a guide table in the launching shaft, and mounting a launching bracket; a large crawler crane is used for sequentially hoisting a locomotive, a 6 # trolley, a 5 # trolley, a 4 # trolley, a 3 # trolley, a middle shield, a front shield, a cutterhead, an erector, a spiral conveyor and a tail shield, a counter-force frame is installed, a hoisting connecting bridge, a 2 # trolley and a 1 # trolley are hoisted, split starting is temporarily connected, pipe pieces are assembled, tunneling is conducted by 40 m, the 5 # trolley and the 6 # trolley are connected, and normal tunneling can be conducted after the whole shield machine is assembled. According to the invention, the technical problems of rapid assembly and split starting tunneling under the conditions of narrow space and tight construction period requirement in shield construction can be solved.

Description

Technical Field

[0001] The present invention belongs to the field of shield machine construction, and more specifically, relates to a method for quickly assembling a split starter in a narrow space of a shield machine. Background Art

[0002] Shield machines play a core and important role in modern tunnel construction due to their high degree of automation, fast construction speed, good safety, low environmental impact, strong adaptability, all-weather construction, and reduced impact on ground buildings. The start of the shield machine is a key link in shield construction, and the safety and efficiency of the start must be ensured.

[0003] Tunnel construction often faces problems such as narrow space and tight construction period, making it difficult to start the shield machine as a whole. In order to solve these problems, a method for starting the shield machine separately is urgently needed. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] One object of the present invention is to provide a method for quickly assembling a split starter in a narrow space of a shield machine, which can solve the technical problem of quickly assembling and starting a split starter in shield construction under the conditions of narrow space and tight construction period.

[0006] In order to achieve these purposes and other advantages of the present invention, a method for quickly assembling a split starter in a narrow space of a shield machine is provided, which comprises the following steps: S1: Two shield starting holes and TBM starting holes are excavated on both sides of the starting shaft. After the construction of the bottom slab of the starting hole is completed, a concrete guide platform is poured on the bottom slab, and the starting bracket is installed in the starting shaft; S2: Hoist the locomotive into the starting shaft, assemble the battery, install the counterweight, and then hoist a hopper chassis and two transport carts into the starting shaft. Then move the locomotive, hopper chassis and transport carts into the TBM starting tunnel. S3: hoist the 6# trolley into the starting shaft and drag it to the TBM starting hole to make room for the 5# trolley to go down into the shaft. Then, the 5# trolley, 4# trolley, and 3# trolley are lowered into the shaft in sequence; S4: The shield middle shield, front shield, cutterhead, and shield assembly machine are hoisted into the starting shaft in sequence. The front shield is connected to the front of the middle shield, the cutterhead is connected to the front of the front shield, and the shield assembly machine is connected to the cross beam on the middle shield; S5: Lift the shield screw conveyor into the starting shaft, insert it from the middle hole of the middle shield to the bottom of the cutter head, and tighten it with bolts; S6: After the tail shield is welded with the tail brush and the stop plate, it is hoisted into the starting shaft, inserted into the screw conveyor, and connected with the middle shield; S7: Push the main machine consisting of the cutterhead, front shield, middle shield, shield screw conveyor and tail shield to the tunnel face, lay rails and sleepers for the main machine and trolley in the starting tunnel, transport the reaction frame to the large lining section by locomotive, and hoist the reaction frame using the pre-buried hoisting points on the surrounding rock; S8: Hoist the connecting bridge into the starting shaft and place it on the transport truck. Move it to the left and enter the shield starting tunnel. Hoist the 2# trolley down the shaft and drag it to the TBM starting tunnel on the right. Then, lower the 1# trolley into the shaft. S9: The locomotive drags trolley 1, trolley 2, trolley 3, and trolley 4 into the TBM launch tunnel. The equipment bridge is used to connect trolley 1 with trolley 2, trolley 2 with trolley 3, and trolley 3 with trolley 4. Trolleys 5 and 6 are stored in the TBM launch tunnel. Trolley 4 is connected with trolley 5 using temporary tooling. A 50-meter pipeline length is reserved. The hydraulic and electrical pipelines are connected for debugging. The machine starts in parts, assembles the first ring of segments, and the main engine advances 40 meters forward. S10: Disconnect the temporary tools from 4# and 5# trolleys, push 5# and 6# trolleys to the rear of 4# trolley, and connect the equipment bridges of 4# and 5# trolleys. The assembly of the whole shield machine is now completed.

[0007] Preferably, the shield tunnel launch tunnel is at least 45 m long and the TBM tunnel launch tunnel is at least 50 m long.

[0008] Preferably, the guide platform has an arc-shaped cross-section, is cast with C30 reinforced concrete, has double rows of P43 rails embedded in it, has a 30 mm outer net protective layer of lining steel bars, and a 30 mm inner net protective layer, has the same slope as the line, and the distance between the highest point of the guide platform and the rail surface is always 840 mm.

[0009] Preferably, the main cross beam, main longitudinal beam and diagonal connecting beam of the starting bracket are all made of H250 steel, the supporting beam of the starting bracket is welded with No. 20 steel plate, and the main running track of the starting bracket is made of 43 steel rail.

[0010] Preferably, the allowable deviation of the starting bracket installation is ±10 mm for horizontal and ±15 mm for elevation control.

[0011] Preferably, the lifting equipment is a 500 t crawler crane.

[0012] Preferably, the shield cutterhead is hoisted into place, connected to the front shield and the cutterhead bolts are pulled.

[0013] Preferably, the shield assembly machine is hoisted into place, connected to the cross beam on the middle shield, and the bolts are tightened with torque.

[0014] Preferably, a flaw detection test is performed after the reaction frame is installed and welded.

[0015] The present invention includes at least the following beneficial effects: First, due to space and construction period restrictions at the construction site, the shield machine cannot be started as a whole. However, the present invention digs starting holes on both sides of the starting shaft to start in parts, so that the main machine can complete the entire splicing of the shield machine after 40 m of forward excavation, effectively solving the space and time restrictions, greatly improving construction efficiency, saving construction costs, and reducing construction difficulty. Second, the lubrication structure provided by the present invention can provide lubrication between the shield body and the guide rail, reduce the friction of the shield body guide rail, and facilitate the movement of the shield body.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the plan layout of the launch tunnel; Figure 2 It is a cross-sectional view of the guide platform; Figure 3 is a cross-sectional view of the bracket; Figure 4 This is a schematic diagram of a 500t crawler crane; Figure 5 This is a schematic diagram of locomotive hoisting; Figure 6 This is the schematic diagram of the lifting of 6# and 5# trolleys; Figure 7 This is the schematic diagram of the lifting of 4# and 3# trolleys; Figure 8 This is the schematic diagram of Zhongdun hoisting; Fig. 9 This is the schematic diagram of the front shield hoisting; Fig.10 This is a schematic diagram of the cutter head hoisting; Fig.11 This is a schematic diagram of the assembly machine hoisting; Fig.12 This is a schematic diagram of the screw conveyor hoisting; Fig.13 This is a schematic diagram of tail shield hoisting; Fig.14 This is a schematic diagram of the main engine's air thrust and reaction frame; Fig.15 This is a schematic diagram of the connection between the bridge and the trolley; Fig.16 It is a schematic diagram of the connection and split start of each part; Fig.17 This is a schematic diagram of the split excavation. Fig.18 It is a structural diagram of the lubrication structure.

[0018] 1. Starting shaft; 2. Concrete guide platform; 3. Shield machine shield; 4. Travel track; 5. Crawler crane; 6. Locomotive; 7. Ore bucket chassis; 8. Transport cart; 9. 6# trolley; 10. 5# trolley; 11. 4# trolley; 12. 3# trolley; 13. Middle shield; 14. Front shield; 15. Cutter head; 16. Shield assembler; 17. Screw conveyor; 18. Tail shield; 19. Reaction frame; 20. Connecting bridge; 21. 1# trolley; 22. 2# trolley; 23. Piston 23; 24. Mounting groove 24; 25. Mounting plate 25; 26. Gear plate 26; 27. Second rotating shaft 27; 28. Limiting channel 28; 29. ​​Gear bar 29; 30. Spring 30; 31. Friction roller 31; 32. Long strip hole 32; 33. Oil storage tank 33. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0022] <Example 1> like Figure 1-18 As shown, a method for quickly assembling a split starter in a narrow space of a shield machine comprises the following steps: S1: Two shield starting holes and TBM starting holes are excavated on both sides of the starting shaft 1. After the construction of the bottom slab of the starting hole is completed, a concrete guide platform 2 is poured on the bottom slab, and a starting bracket is installed in the starting shaft 1. S2: hoist the locomotive 6 into the starting shaft 1, assemble the battery, install the counterweight, and then hoist a hopper chassis 7 and two transport carts 8 into the starting shaft 1, and then move the locomotive 6, hopper chassis 7, and transport cart 8 into the TBM starting tunnel; S3: hoist the 6# trolley 9 into the starting shaft 1, and drag it to the TBM starting hole to make room for the 5# trolley 10 to go down the shaft, and in this way, the 5# trolley 10, the 4# trolley 11, and the 3# trolley 12 enter the starting shaft 1 in sequence; S4: hoisting the shield middle shield 13, front shield 14, cutter head 15, and shield assembly machine 16 into the starting shaft 1 in sequence, the front shield 14 is connected to the front of the middle shield 13, the cutter head 15 is connected to the front of the front shield 14, and the shield assembly machine 16 is connected to the cross beam on the middle shield 13; S5: hoist the shield screw conveyor 17 into the starting shaft 1, insert it from the middle hole of the middle shield 13 to the bottom of the cutter head 15, and fasten it with bolts; S6: After the tail shield 18 is welded with the tail brush and the stop plate, it is hoisted into the starting shaft 1, inserted into the screw conveyor 17, and docked with the middle shield 13; S7: Push the main machine consisting of the cutter head 15, the front shield 14, the middle shield 13, the shield screw conveyor 17, and the tail shield 18 to the tunnel face, lay rails and sleepers for the main machine and the trolley in the starting tunnel, transport the reaction frame 19 to the large lining section by the locomotive 6, and hoist the reaction frame 19 using the pre-buried hoisting points on the surrounding rock; S8: hoist the connecting bridge 20 into the starting shaft 1 and place it on the transport trolley 8, move it to the left and enter the shield starting hole, hoist the 2# trolley 22 into the starting shaft 1 and drag it to the TBM starting hole on the right, and hoist the 1# trolley 21 down the shaft; S9: Locomotive 6 drags 1# trolley 21, 2# trolley 22, 3# trolley 12, and 4# trolley 11 into the TBM starting tunnel. The equipment bridge is used to connect 1# trolley 21 with 2# trolley 22, 2# trolley 22 with 3# trolley 12, and 3# trolley 12 with 4# trolley 11. The 5# and 6# trolleys 9 are stored in the TBM starting tunnel. The 4# trolley 11 and the 5# trolley 10 are connected by temporary tooling. A 50 m pipeline length is reserved, and the hydraulic and electrical pipelines are connected for debugging. The machine starts in split mode, assembles the first ring of segments, and the main engine advances 40 m forward. S10: Disconnect the 4# trolley 11 and the 5# trolley 10 except for the temporary tooling, push the 5# trolley 10 and the 6# trolley 9 to the end of the 4# trolley 11, and connect the equipment bridges of the 4# and 5# trolleys 10. At this point, the assembly of the whole shield machine is completed.

[0023] The shield starting hole and TBM starting hole on both sides of the starting shaft 1 are excavated by the mining method. After the guide platform is cast and the starting bracket is installed in the starting shaft 1, a large crawler crane 5 is used to hoist the locomotive 6, 6# trolley 9, 5# trolley 10, 4# trolley 11, 3# trolley 12, middle shield 13, front shield 14, cutter head 15, shield assembly machine 16, screw conveyor 17, tail shield 18, install the reaction frame 19, hoist the connecting bridge 20, 2# trolley 22, 1# trolley 21, temporarily connect the split starting, assemble the pipe segments, excavate 40m, connect 5# trolley 10 and 6# trolley 9, complete the assembly of the shield machine and excavate normally. The starting holes on both sides can be constructed at the same time to shorten the construction period. The shaft is 34 m long, 30 m wide and 35 m deep. It adopts a straight-wall zigzag cast-in-place concrete structure and can also serve as a track shaft.

[0024] The present invention excavates the shield starting hole and the TBM starting hole on both sides of the starting shaft 1, so that the starting shaft 1 can be used for the starting of the shield machine and the starting of the TBM, and can also be used as a track shaft in the later stage, thereby realizing the multifunctional application of the starting shaft 1. The present invention makes full use of the space of the TBM starting hole, and starts the shield machine in a split manner, so that the main machine can complete the entire splicing of the shield machine after the main machine advances 40 m forward, effectively solving the problem of space and time limitations, greatly improving the construction efficiency, saving construction costs, and reducing the construction difficulty. After the shield machine is started, the TBM can be started.

[0025] Furthermore, the shield starting tunnel is at least 45 m long, and the TBM starting tunnel is at least 50 m long. The present invention uses the mining method to excavate the shield starting tunnel and the TBM starting tunnel at the same time, which can shorten the construction period. And the characteristics of the shield starting and TBM starting are fully considered, and the shield machine starting work can be realized respectively within the shortest excavation distance. Further, the guide platform has an arc section, the guide platform is cast with C30 reinforced concrete, double rows of P43 rails are embedded in the guide platform, the outer net protective layer of the lining steel bar is 30 mm, the inner net protective layer is 30 mm, the slope of the guide platform has the same slope as the line, and the distance between the highest point of the guide platform and the rail surface is always 840 mm. The guide platform has an arc section to ensure that the shield body and the guide platform have sufficient contact surface. By controlling the thickness of the protective layer, the construction quality of the guide platform is improved to avoid the "knock" of the shield caused by insufficient strength, the uncontrollable posture of the shield, the broken pipe segment, and even the possible consequences of the shield sliding out of the guide platform.

[0026] Furthermore, the main cross beam, main longitudinal beam and diagonal connecting beam of the starting bracket are all made of H250 steel, the supporting beam of the starting bracket is welded with No. 20 steel plate, and the main running track 4 of the starting bracket is made of 43 steel rails. Using H250 steel as the main cross beam, main longitudinal beam and diagonal connecting beam of the starting bracket makes the starting bracket have a strong load bearing capacity. 43 steel rails refer to steel rails with a weight of 43kg per meter.

[0027] Furthermore, the allowable deviation of the starting bracket installation is ±10 mm in the horizontal direction and ±15 mm in the elevation control. By controlling the installation accuracy of the starting bracket, the quality and safety of the construction are ensured.

[0028] Furthermore, the hoisting equipment is a 500 t crawler crane 5. The 500 t crawler crane 5 can meet the hoisting requirements of various components of the shield machine, ensuring hoisting safety.

[0029] Furthermore, the shield cutter head 15 is hoisted in place, connected to the front shield 14, and the bolts of the cutter head 15 are pulled, so that the cutter head 15 will not loosen or fall off during the working process, thereby ensuring the stable operation of the shield machine.

[0030] Furthermore, the shield assembling machine 16 is hoisted into place and connected to the cross beam on the middle shield 13, and the bolts are tightened with torque to avoid deformation or damage of the equipment due to loose tightening.

[0031] Further, after the reaction frame 19 is installed and welded, flaw detection is performed. Flaw detection can be performed using X-rays or ultrasound to determine the welding quality, eliminate possible defects in welding, and improve welding quality and reliability.

[0032] <Example 2> In order to reduce the friction between the shield machine and the travel track 4, a lubrication structure is provided on the travel track 4, and the lubrication structure includes: The long strip hole 32 is arranged on the running track 4 and is perpendicular to the length direction of the running track 4; An oil storage tank 33 is disposed below the long strip hole 32, and a piston 23 is disposed in the oil storage tank 33; A drive structure comprising: Two mounting grooves 24 are arranged on the inner walls of both sides of the oil storage tank 33; Two mounting plates 25, the mounting plates 25 are slidably matched with the mounting grooves 24, a spring 30 is provided below the mounting plates 25 to lift the mounting plates 25, and a first rotating shaft is rotatably provided between the two mounting plates 25; The friction roller 31 includes a first roller body and a second roller body, both of which are fixedly arranged on the rotating shaft, and both of which can partially protrude the long strip hole 32 under the action of the spring, and there is a gap between the first roller body and the second roller body, and the surfaces of the first roller body and the second roller body are provided with friction lines to increase the friction between the roller body and the shield body; A gear plate 26, which is disposed on the rotating shaft and located between the first roller body and the second roller body, wherein the diameter of the gear plate 26 is smaller than the diameter of the friction roller 31; A second rotating shaft 27, which is rotatably disposed in the middle of the upper end of the oil storage tank 33; The limiting channel 28 is arranged on the right side of the gear plate 26 and below the gear plate 26. The cross section of the limiting channel 28 is rectangular. The bottom plate of the limiting channel 28 extends to the left through the side wall of the oil storage tank 33 to the second rotating shaft 27. The upper surface of the bottom plate of the limiting channel 28 and the highest point of the second rotating shaft 27 are in the same plane. A gear bar 29, one end of which is connected to the piston 23, and the other end of which is wound around the second rotating shaft 27 and then inserted into the limiting channel 28, the gear bar 29 is slidably matched with the limiting channel 28, and the gear bar 29 is made of a bendable material; Among them, the shield machine squeezes the friction roller 31 and moves downward into the oil storage tank 33, the gear plate 26 moves downward with the friction roller 31, and the gear plate 26 meshes with the gear bar 29. Since the friction roller 31 is in close contact with the shield body of the shield machine, that is, the front shield 14, the middle shield 13 and the tail shield 18, when the shield machine moves forward, the friction roller 31 can be driven to rotate, the friction roller 31 drives the rotating shaft to rotate, the rotating shaft drives the gear plate 26 to rotate, the gear plate 26 drives the gear bar 29 to move to lift the piston 23, and the lubricating oil in the oil storage tank 33 overflows from the long strip hole 32 to reduce the friction between the shield body of the shield machine and the surface of the walking track 4; after the shield machine passes through the friction roller 31, the friction roller 31 moves upward under the action of the spring 30, and the gear plate 26 disengages from the gear bar 29.

[0033] Before use, move the piston 23 to the bottom of the oil storage tank 33 and add lubricating oil to the oil storage tank 33; during operation, the outer shell of the shield body 3 of the shield machine abuts against the friction roller 31, that is, when the shield body moves to the left, it will drive the friction roller 31 to rotate counterclockwise. When the friction roller 31 is pressed down, the gear plate 26 and the gear bar 29 will mesh, and the gear plate 26 will drive the gear bar 29 to move to the right, thereby pulling the piston 23 to move upward, and the lubricating oil in the oil storage tank 33 will overflow from the oil storage tank 33, thereby playing a role in lubricating the shield body and the walking track 4, reducing friction, and facilitating the movement of the shield body. Before the next use, move the piston 23 to the bottom of the oil storage tank 33 again and fill it with lubricating oil.

[0034] In this embodiment, when the shield machine moves, lubricating oil can be continuously output, thereby reducing the friction between the shield machine and the travel track 4 and improving the construction efficiency.

[0035] <Application Examples> Taking the Qingdao Metro Line 15 civil construction project of Section 1 and Work Area as an example, a shield / TBM starting and track shaft is set up in the Xiafu section of the project. Starting shaft 1 is 34 m long, 30 m wide, and 35 m deep, and adopts a straight wall zigzag cast-in-place concrete structure. The shield starting tunnel and TBM starting tunnel are excavated using the mining method. The shield starting tunnel is 45 m long and the TBM starting tunnel is 50 m long. Two composite shield machines are used in the shield section, starting from the small mileage end of the starting shaft 1. The two lines are excavated for about 360 m each until they are hoisted out of the hoisting shaft; the shield excavation diameter is 6.49 m, and prefabricated segment lining is used. Two double-shield TBMs are used in the TBM section, starting from the large mileage end of the starting shaft. The two lines are excavated for about 1234 m each to the Fujin Road passing station. The shield excavation diameter is 6.50 m, and prefabricated segment lining is used. See the plan layout of the starting tunnel for details. Figure 1 .

[0036] After the construction of the starting tunnel bottom slab is completed, the concrete guide platform is cast. The guide platform is set in an arc shape and uses C30 reinforced concrete. Double rows of P43 rails are embedded in the arc-shaped guide platform. The guide platform is an inclined guide platform with the same slope as the line. The distance between the highest point of the guide platform and the rail surface is always 840 mm. The rail bracket is made of C25 threaded steel, and a pair is set up every 1 m in the centerline direction of the tunnel. Before pouring concrete, the measurement team must re-measure the plane and elevation position of the positioned embedded parts, and pour concrete only after meeting the requirements. See the profile of the guide platform Figure 2 .

[0037] A steel starting bracket is installed at the starting shaft 1, and the starting bracket installation is controlled within the allowable deviation: horizontal ±10m, elevation control ±15 mm. The main crossbeam, main longitudinal beam, and diagonal connecting beam of the starting bracket are all made of H250 steel, the starting bracket support beam is welded with 20 steel plates, the walking track 4 is made of 43 steel rails, and the connecting flange is made of 20 thick steel plates. The cross section of the support beam is shown in the figure Figure 3 .

[0038] A 500t crawler crane was used to hoist the shield machine into the well in sections. Figure 4 .

[0039] The 60 t locomotive 6 is hoisted into the starting shaft 1, the battery is assembled, the counterweight is installed, and a hopper chassis 7 and two transport carts 8 are lowered into the shaft to prepare for towing the shield rear supporting trolley. Figure 5 .

[0040] The 6# and 5# trolleys 10 were lowered into the well one after another and dragged to the other side for temporary storage. After the front assembly was completed and excavated 40m, they were connected to the 4# trolley 11. Figure 6 Specifically, the 6# trolley 9 is hoisted into the starting shaft 1 and dragged to the right TBM starting hole, and then the 5# trolley 10 is hoisted into the starting shaft 1 and dragged to the right TBM starting hole.

[0041] The 4# and 3# trolleys 12 were lowered into the well one after another and dragged to the other side for temporary storage. After the front shield machine was assembled, it was connected to the 2# trolley 22. Figure 7 Specifically, the 4# trolley 11 is lowered into the well and dragged to the right TBM starting hole, and then the 3# trolley 12 is lowered into the well and dragged to the right TBM starting hole.

[0042] The shield 13 was hoisted into the starting shaft 1 and hoisted into place. Figure 8 .

[0043] The front shield 14 of the shield machine is hoisted into the starting shaft 1, hoisted to the front of the middle shield 13, and connected with the middle shield 13. Fig. 9 .

[0044] The shield cutterhead 15 is hoisted into the starting shaft 1, and the front shield 14 is hoisted in front of it, connected with the front shield 14, and the bolts of the cutterhead 15 are pulled. Fig.10 .

[0045] The shield assembly machine 16 is hoisted into the starting shaft 1, hoisted into place, connected to the cross beam on the middle shield 13, and the bolts are tightened with torque. Fig.11 .

[0046] The shield screw conveyor 17 is hoisted into the starting shaft 1, inserted from the middle hole of the middle shield 13 to the bottom of the cutter head 15, and the bolts are fixed and tightened. Fig.12 .

[0047] After the tail shield 18 is welded with the tail brush and the stop plate, it is hoisted into the starting shaft 1 and inserted into the screw conveyor 17, and connected with the middle shield 13. Fig.13 .

[0048] The main engine is pushed to the face, and steel sleepers and tracks for the main engine and trolley are laid in the starting tunnel. The reaction frame 19 is transported to the large section of the lining by a battery car. The reaction frame 19 is hoisted by hand winch and pre-buried hoisting points. After welding, flaw detection is carried out. Fig.14 .

[0049] The connecting bridge 20 is hoisted into the starting shaft 1 and placed on the transport flatbed 8. It is transported to the left to reserve the trolley hoisting space. The 2# trolley 22 is lowered into the well and dragged to the right TBM starting hole. The 1# trolley 21 is lowered into the well and connected to the 1#, 2#, and 3# trolleys 12. Fig.15 .

[0050] Battery locomotive 6 drags trolley 1#, trolley 2#, trolley 3#, trolley 4#11 into the shield starting tunnel. Trolley 1#, trolley 2#, trolley 3#, trolley 4#11 are connected by equipment bridge; trolley 5# and trolley 6#9 are stored on the other side, and temporary tooling is used to connect trolley 4#11 and trolley 5#10. A 50m pipeline length is reserved, and hydraulic and electrical pipelines are connected for debugging, and then the parts are started. Fig.16 At this time, the main engine and trolleys 1#, 2#, 3#, and 4# are located in the shield tunnel, and trolleys 5# and 6# are located in the TBM tunnel, meeting the slag discharge requirements of the starting shaft 1. Assemble the first ring of segments and advance 40m. Fig.17 .

[0051] Disconnect the temporary tooling of 4# trolley and 5# trolley 10, push 5# trolley and 6# trolley 9 to the end of 4# trolley 11, connect the equipment bridge of 4# trolley and 5# trolley 10, and the assembly of the whole shield machine is completed.

[0052] After completing the above steps, the shield machine has completed the starting condition and entered the normal excavation condition.

[0053] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for quickly assembling a split starter in a narrow space of a shield machine, characterized in that: The following steps are involved: S1: Two shield starting holes and TBM starting holes are excavated on both sides of the starting shaft. After the construction of the bottom slab of the starting hole is completed, a concrete guide platform is poured on the bottom slab, and the starting bracket is installed in the starting shaft; S2: Hoist the locomotive into the starting shaft, assemble the battery, install the counterweight, and then hoist a hopper chassis and two transport carts into the starting shaft. Then move the locomotive, hopper chassis and transport carts into the TBM starting tunnel. S3: Hoist the 6# trolley into the starting shaft and drag it to the TBM starting hole to make room for the 5# trolley to go down into the shaft. Then, the 5# trolley, 4# trolley, and 3# trolley are lowered into the shaft in sequence; S4: The shield middle shield, front shield, cutterhead, and shield assembly machine are hoisted into the starting shaft in sequence. The front shield is connected to the front of the middle shield, the cutterhead is connected to the front of the front shield, and the shield assembly machine is connected to the cross beam on the middle shield; S5: Lift the shield screw conveyor into the starting shaft, insert it from the middle hole of the middle shield to the bottom of the cutter head, and tighten it with bolts; S6: After the tail shield is welded with the tail brush and the stop plate, it is hoisted into the starting shaft, inserted into the screw conveyor, and connected with the middle shield; S7: Push the main machine consisting of the cutterhead, front shield, middle shield, shield screw conveyor and tail shield to the tunnel face, lay rails and sleepers for the main machine and trolley in the starting tunnel, transport the reaction frame to the large lining section by locomotive, and hoist the reaction frame using the pre-buried hoisting points on the surrounding rock; S8: Hoist the connecting bridge into the starting shaft and place it on the transport truck. Move it to the left and enter the shield starting tunnel. Hoist the 2# trolley down the shaft and drag it to the TBM starting tunnel on the right. Then, lower the 1# trolley into the shaft. S9: The locomotive drags trolley 1, trolley 2, trolley 3, and trolley 4 into the TBM launch tunnel. The equipment bridge is used to connect trolley 1 with trolley 2, trolley 2 with trolley 3, and trolley 3 with trolley 4. Trolleys 5 and 6 are stored in the TBM launch tunnel. Trolley 4 is connected with trolley 5 using temporary tooling. A 50-meter pipeline length is reserved. The hydraulic and electrical pipelines are connected for debugging. The machine starts in parts, assembles the first ring of segments, and the main engine advances 40 meters forward. S10: Disconnect the temporary tools from 4# and 5# trolleys, push 5# and 6# trolleys to the rear of 4# trolley, and connect the equipment bridges of 4# and 5# trolleys. The assembly of the whole shield machine is now completed.

2. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The length of the shield tunnel launch tunnel is at least 45 m, and the length of the TBM tunnel launch tunnel is at least 50 m.

3. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The guide platform has an arc-shaped cross-section and is cast with C30 reinforced concrete. Double rows of P43 rails are embedded in the guide platform. The outer net protective layer of the lining steel bars is 30 mm, and the inner net protective layer is 30 mm. The slope of the guide platform is the same as that of the line, and the distance between the highest point of the guide platform and the rail surface is always 840 mm.

4. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The main cross beam, main longitudinal beam and diagonal connecting beam of the starting bracket are all made of H250 steel, the supporting beam of the starting bracket is welded with No. 20 steel plate, and the main running track of the starting bracket is made of 43 steel rail.

5. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 4, characterized in that: A lubrication structure is provided on the walking track.

6. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The allowable deviation of the starting bracket installation is ±10 mm for horizontal and ±15 mm for elevation control.

7. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The lifting equipment is a 500 t crawler crane.

8. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The shield cutterhead is hoisted into place, connected to the front shield and the cutterhead bolts are pulled.

9. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: The shield assembly machine is hoisted into place, connected to the cross beam on the middle shield, and the bolts are tightened with torque.

10. The method for rapidly assembling a split starter in a narrow space of a shield machine according to claim 1, characterized in that: After the reaction frame is installed and welded, a nondestructive testing test is carried out.

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