Split-type starting multifunctional operation trolley for slurry shield machine and rapid extension construction method

Abstract

The present invention discloses a multifunctional operation trolley for split-starting of a slurry shield machine and a rapid extension construction method, aiming to solve the technical problems in the prior art that pipeline extension construction is time-consuming and labor-intensive, with high costs and high safety risks. The operation trolley mainly includes a synchronous grouting mechanism, a pipeline replacement mechanism, an operation platform, a main engine room, etc.; the rapid extension construction method includes the steps of shield tunneling, pipe segment installation, mud pipeline extension, and circulation advancement. The multifunctional operation trolley of the present invention integrates multiple functions (mud pipeline replacement, synchronous grouting, grease injection, secondary grouting, shield machine operation), which can realize the purpose of fast completion of split-starting of the shield, and the rear supporting trailer is lowered into the well at one time to realize the purpose of whole machine tunneling. The construction method of the present invention adopts a multifunctional operation trolley to connect and extend the mud pipeline, which is easy to operate and implement, can form a water circulation operation, accelerate the tunneling rate, reduce the construction period risk caused by the long extension time of the mud pipeline, save labor input, and reduce costs.

Description

Technical Field

[0001] The invention relates to the technical field of shield tunneling, and in particular to a split-starting multifunctional operating trolley for a slurry shield machine and a rapid extension construction method. Background Art

[0002] In recent years, with the development of economy and society, my country's infrastructure industry has developed rapidly, and its support capacity for economic and social development has been greatly improved. Construction technology in infrastructure technology has become more and more diversified and mature, among which shield construction technology has also made rapid progress and its application scope has become wider and wider. The shield machine consists of a machine head and several subsequent equipment trolleys, and generally adopts two starting methods: integral and split.

[0003] The current commonly used solution for extending the shield split starting pipeline is to dig a section of mud pipe and use manual labor and small machines to connect various pipelines together. This method is widely used, but it has more construction processes and takes a long time, which directly leads to a longer construction period, a large amount of manpower investment, high costs, and high safety risks.

[0004] The shield split-starting technology is subject to the limitations of the starting working shaft and does not have the conditions for overall starting. However, in order to quickly complete the split-starting and realize the excavation of the entire machine and effectively reduce the slow construction progress caused by the split-starting of the shield, it is particularly critical to quickly and safely split-start the large-diameter shield machine within the limited starting space to improve the construction progress. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional operating trolley for split-starting of a slurry shield machine, aiming to solve the technical problems of dispersed operating functions and inability to integrate operation and control in shield split-starting excavation projects.

[0006] Another aspect of the present invention is to provide a rapid extension construction method based on the multifunctional work trolley, aiming to solve the technical problems in the prior art that pipeline extension construction is time-consuming, labor-intensive, costly and has great safety risks.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A multifunctional operation trolley for split-starting of a slurry shield machine is designed, comprising:

[0009] The synchronous grouting mechanism is used to store and inject the mortar required for shield tunneling, and includes a mortar tank, a grouting pump, and a connecting pipe for connecting to the synchronous grouting pipeline of the shield machine;

[0010] The pipeline replacement mechanism is used to realize the replacement and extension of the mud pipeline, which includes a rotating boom and a mud extension pipeline. The mud extension pipeline includes a mud hard pipe, a transition hose, a hose clamping box, and a hose hanging wheel platform; the mud hard pipe bridges the corresponding shield machine inlet and outlet mud pipe and the transition hose; one end of the transition hose is used to connect the mud hard pipe, and the other end is used to connect the corresponding in-hole extension mud pipe; the hose hanging wheel platform is installed and fixed on one side of the trolley frame via a corresponding support frame to support the hose clamping box; the transition hose is guided and moved backward and forward by the hose clamping box to realize the extension and reset of the mud extension pipeline;

[0011] A working platform, used for setting up expansion equipment and / or performing corresponding business operations, which is arranged at the front end and / or the rear end of the platform frame;

[0012] The main engine room is used for shield machine control. It is arranged between the synchronous grouting mechanism and the pipeline replacement mechanism to control the operation of the shield machine, as well as the implementation of synchronous grouting, secondary grouting, grease injection and / or grouting pipeline replacement.

[0013] The split-starting multifunctional operation platform of the slurry shield machine also includes a grease injection mechanism for adding grease, lubricating grease or / and sealing grease to the shield tail of the shield machine, which includes a grease pump and corresponding connecting pipelines arranged on the operation platform.

[0014] The split-starting multifunctional operation trolley of the slurry shield machine also includes a secondary grouting mechanism, which is composed of a slurry stirring container, a secondary grouting pump and corresponding connecting pipelines.

[0015] The rotating boom is installed at the front end and / or the rear end of the trolley frame via a corresponding support frame to implement the lifting operation when the mud pipeline is replaced.

[0016] The pipeline replacement mechanism also includes a roller group installed below the transition hose and the hose clamping box to form a hose sliding channel to guide the hose and reduce the friction of the hose movement.

[0017] The trolley frame is provided with a corresponding support frame, and the mortar tank and the main control room are installed at corresponding positions of the support frame by welding, slotting and / or bolting.

[0018] The bottom of the trolley frame is equipped with rail or trackless running wheels, which are pulled by corresponding traction devices to achieve walking.

[0019] A rapid extension construction method based on the split-starting multifunctional operation trolley of the slurry shield machine is designed, comprising the following steps:

[0020] (1) Shield tunneling: After the preparatory work is completed, the slurry circulation starts. According to the established tunneling parameters, the tunnel is advanced to the advancing stroke. Then the tunnel is stopped and the slurry circulation continues for at least 10 minutes before the circulation is stopped.

[0021] (2) Segment installation: Segments are lowered into the well and transported to the segment assembly area or segment feeder by the segment transport vehicle. After excavation is completed, the segments are installed from the bottom and symmetrically to the top according to the designated segment installation points. Finally, the capping blocks are installed.

[0022] (3) Mud pipeline extension: After the shield tunneling has completed a certain length and the transition hose in the multifunctional working vehicle has been extended to its limit, the machine is stopped, the circulation is stopped, and the inlet and outlet valves of the mud pipeline near the position of the mud extension pipeline are closed. The joint position of the extension area is depressurized and the slurry is discharged into the mud collection box arranged on the working platform. After the pressure relief is completed, the extension position interface is removed, and the transition hose and the hose clamping box are reset. At the rear, the mud extension pipeline is connected to the inlet and outlet mud pipes in the tunnel and the inlet and outlet mud pipes of the shield machine through the lifting mechanism on the rotating boom, and the pipeline extension is completed;

[0023] (4) Circulation propulsion: After the mud pipeline is replaced, open the plate valve to start the mud circulation. After the mud inlet and outlet flow is stable, start the propulsion system and propel forward.

[0024] The segment transport vehicle comprises a traction and towing seat, a segment rotating tray, a trolley bracket and running wheels.

[0025] Compared with the prior art, the main beneficial technical effects of the present invention are:

[0026] 1. The multifunctional operation trolley of the present invention organically integrates a mud pipeline replacement mechanism, a synchronous slurry injection mechanism, a secondary grouting mechanism, a grease injection mechanism and a shield machine operation control system, and multiple functions (mud pipeline replacement, shield synchronous grouting, multiple grease injection, secondary grouting, shield machine operation) in one, which can realize the purpose of fast completion of the split start of the shield, and then the supporting trailer is lowered into the well at one time to realize the purpose of whole machine excavation.

[0027] 2. The various mechanisms of the functional operation trolley of the present invention are reasonably configured, easy to use and maintain, and require less construction personnel. It can effectively improve the progress of on-site construction, is safe and reliable, saves time and effort, and greatly improves work efficiency. It can realize the excavation of the entire machine as soon as possible, improve construction efficiency, and has obvious cost-effectiveness.

[0028] 3. The method of the present invention adopts a multifunctional operating trolley to connect and extend the mud pipeline, which is easy to operate and implement, can form a water circulation operation, speed up the excavation rate, reduce the construction period risk caused by the long extension time of the mud pipeline, save labor input, and reduce costs.

[0029] 4. The replacement of the mud pipe in the method of the present invention achieves a certain degree of mechanization, reduces labor intensity, can improve the efficiency of mud pipeline extension construction, reduce safety risks, save construction time, and has high economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is one of the side views of the split-starting multifunctional operation trolley of the slurry shield machine of the present invention;

[0031] Figure 2 for Figure 1 AA view of the .

[0032] Figure 3 This is the second side view of the split-starting multifunctional operation trolley of the slurry shield machine of the present invention;

[0033] Figure 4 for Figure 3 BB view.

[0034] Figure 5 It is a schematic diagram of the planar structural layout of the split-starting multifunctional operating trolley of the slurry shield machine of the present invention.

[0035] Figure 6 It is a schematic diagram of the connection structure of the mud extension pipeline of the present invention.

[0036] In the above figures, 1 is a mortar tank, 2 is a main control room, 3 is a front rotating boom, 4 is a hose hanging wheel platform, 5 is a support frame, 6 is a right side platform, 7 is a main frame traction seat, 8 is a front platform, 9 is a mud hard pipe, 10 is a roller group, 11 is a hose clamping box, 12 is a traction wheel, 13 is a transition hose, 14 is a mud pipe in and out of the tunnel, 15 is a mud pipe in and out of the shield machine, 16 is a rear rotating boom, and 17 is a rear platform. DETAILED DESCRIPTION

[0037] The specific implementation modes of the present invention are described below in conjunction with the accompanying drawings and examples. However, the following examples are only used to illustrate the present invention in detail and do not limit the scope of the present invention in any way.

[0038] Unless otherwise specified, the equipment, devices or structural components involved in the following embodiments are conventional commercially available products.

[0039] Embodiment 1: The slurry shield machine split start multifunctional operation trolley, see Figure 1 to Figure 6 , including a trolley frame (with rail or trackless running wheels installed at the bottom, and the running is achieved by pulling with corresponding traction devices) and the following components arranged on the trolley frame:

[0040] ① Synchronous grouting mechanism, including mortar tank, grouting pump and connecting pipes for connecting to the synchronous grouting pipeline of the shield machine, to achieve the storage and injection of mortar required for shield excavation;

[0041] ② A pipeline replacement mechanism, which is used to replace and extend the mud pipeline, and includes a rotating boom and a mud extension pipeline. The mud extension pipeline includes a mud hard pipe 9, a transition hose 13, a hose clamping box 11, and a hose hanging wheel platform 4;

[0042] The rotating boom comprises a front rotating boom 3 and a rear rotating boom 16 mounted on the trolley frame by corresponding support frames, so as to implement the lifting operation of materials such as mud pipes and grouting materials in the tunnel;

[0043] The mud hard pipe 9 is installed and fixed on the main beam on the upper part of the support frame 5, and plays a bridging role in connecting the corresponding shield machine inlet and outlet mud pipe 15 and the transition hose 13;

[0044] The transition hose 13 is guided by the hose clamping box 11 and moves forward and backward to achieve the extension and recovery of the mud pipeline (when the trolley moves forward, the transition hose 13 is longitudinally extended and released by the backward sliding of the hose clamping box 11, thereby completing the extension of the mud transportation transition distance. After reaching the limit length of the hose, the hose clamping box is reset to achieve the recovery and winding of the hose, so as to shorten the mud transportation transition distance). One end of the transition hose 13 is used for docking with the mud hard pipe 9, and the other end is used for docking with the corresponding mud pipe in and out of the hole;

[0045] The hose hanging wheel platform 4 is installed and fixed on one side of the support frame 5 to support the hose clamping box 11 and the traction wheel 12 supporting the hose box for driving;

[0046] The roller group 10 composed of a plurality of rollers is correspondingly installed under the transition hose 13 and the hose clamping box 11 to form a hose sliding channel, which guides the hose and reduces the friction of the transition hose 13;

[0047] A corresponding traction wheel 12 is provided below the hose clamping box 11 to enable the hose clamping box 11 to move on a track;

[0048] ③ The operation platform, including the front platform 8 and the rear platform 17 respectively arranged at the front and rear ends of the trolley frame, is used to set up the expansion equipment and perform corresponding business operations;

[0049] ④ A grease injection mechanism, which is used to add grease, lubricating grease and sealing grease to the shield tail of the shield machine, and includes a grease pump and corresponding connecting pipelines arranged on the working platform;

[0050] ⑤ Secondary grouting mechanism, including slurry mixing container, secondary grouting pump and corresponding connecting pipelines, is used to strengthen the grouting of the formed segments in the tunnel, which plays a role in supplementing the insufficient synchronous grouting and stopping the leakage of the segments.

[0051] ⑥ Main machine room, used for shield machine control, is set between the synchronous grouting mechanism and the pipeline replacement mechanism to control the operation of the shield machine, as well as the implementation of synchronous grouting, secondary grouting, grease injection and / or grouting pipeline replacement.

[0052] The mortar tank, the main control room and the rotating boom are installed at corresponding positions of the support frame by means of welding, slotting and / or bolting.

[0053] Embodiment 2: A method for the rapid extension of a split-unit slurry shield machine is implemented based on the multifunctional work trolley described in Embodiment 1. According to normal procedures, after completing shield tunneling and segment installation, and reaching the extension length of the slurry pipe, rapid replacement is achieved with the help of the multifunctional work trolley.

[0054] The specific steps include:

[0055] 1. Construction preparation: The shield machine has been assembled and debugged in the well; all preparatory work before the start of the shield has been completed and accepted before the start node, and the conditions for separate start are met.

[0056] 2. Shield tunneling: After all preparatory work is completed, start the mud circulation system, start the shield machine propulsion system and advance it forward according to the established tunneling parameters. After reaching the propulsion stroke, stop the propulsion and continue the mud circulation for no less than 10 minutes before stopping the circulation to prevent difficulties in the subsequent start-up of the mud circulation system. The multifunctional operating trolley is connected to the shield main machine and moves forward synchronously with the shield machine. The mud pipeline extension device on the multifunctional operating trolley moves slowly backward using the working track as the tunneling progresses.

[0057] 3. Mud and water management: Mud and water preparation is to mix water, bentonite, clay and other materials in a certain proportion in the ground mud and water field, and add dispersing adhesive solvents, organic mother water adhesives, weighting agents and other mud conditioning agents when necessary. Adjust the proportion, viscosity, plastic deformation value, gel strength, mud wall formation, and lubricity as needed to make it a plastic fluid, and the mud and water preparation process is completed. The shield machine slurry system is connected to the multi-functional operating vehicle slurry pipeline and enters the excavation chamber. The mud carries the slag out through the slurry discharge system and enters the mud and water treatment equipment for separation. The mud is recycled after certain adjustments.

[0058] 4. Segment assembly: The segment selection is based on the premise of meeting the tunnel line shape. The focus is on considering that the shield tail gap after the segment is installed must meet the limit of the next excavation cycle, ensuring that there is enough shield tail gap to prevent the shield tail from directly contacting the segment. Before installing the segment, select the point where the segment is to be installed according to the shield tail gap and the thrust cylinder stroke. When the shield excavation reaches the predetermined length and the thrust cylinder stroke of the capping block to be installed, the shield machine stops excavation and installs the segment. The segment installation must start from the bottom of the tunnel, then install the adjacent blocks in sequence, and finally install the capping block. After each segment is installed, immediately insert the segment longitudinal circumferential connection bolts, put on the nuts and tighten them with a pneumatic wrench. After the segment is installed in place, the thrust cylinder at the corresponding position should be extended in time to tighten the segment. The thrust should be greater than the force required to stabilize the segment, and then the segment installation machine can be removed.

[0059] 5. Mud pipeline extension: After the shield tunneling has completed a certain length, that is, the transition hose 11 in the multifunctional operating trolley has reached its limit, the machine is stopped, the circulation is stopped, the inlet and outlet valves near the mud extension pipeline position are closed, the extension joint position is depressurized, and the slurry is discharged into the mud collection box arranged on the working platform (after the residual mud in the pipeline is discharged, it is transported to the tunnel entrance by the horizontal transport battery car in the tunnel and discharged into the ground mud storage pool). After the pressure relief is completed, the extension position interface is removed, and the transition hose 13 at the rear end of the multifunctional trolley is returned to its original position through the traction device (the traction device is fixed on the hose hanging wheel platform, and the hose clamping box 11 is reset by tightening the wire rope). The rear part is connected to the mud extension pipeline with the in-and-out mud pipe in the tunnel and the in-and-out mud pipe of the shield machine through the lifting mechanism on the rotating boom (the lifting device is fixed on the rotating boom and can move within the boom range) to complete the pipeline extension.

[0060] 6. Circulation propulsion: After the mud pipeline is replaced, open the plate valve to start the mud circulation system. After the mud inlet and outlet flow is stable, start the propulsion system and start moving forward.

[0061] Beneficial effects in terms of safety and quality include:

[0062] ① The use of a multifunctional operating trolley avoids the safety risk of pipelines falling during conventional pipeline installation and removal.

[0063] ② Reduce manpower to avoid personal safety caused by unsafe factors such as pipeline pressure during pipeline installation and removal.

[0064] ③ Avoid lifting and hoisting injuries caused during pipeline lifting and docking.

[0065] ④ The installation quality of the sealing device between pipelines can be guaranteed to a certain extent during the pipeline replacement process using a multi-functional trolley.

[0066] ⑤ The multifunctional operation trolley is used to organize the pipelines in an orderly manner, thereby increasing the operation area and avoiding operation risks.

[0067] Beneficial effects in terms of duration include:

[0068] ① The use of a multifunctional work trolley extends the length of the hose and reduces the frequency of pipeline replacement.

[0069] ② The multifunctional work trolley is equipped with a rotating boom, which ensures the lifting of the pipeline and enables faster extension of the pipeline.

[0070] ③ The multifunctional trolley of the present invention integrates multiple functions in one, can break through the construction limitations of a single device, shorten the pipeline extension time, reduce the work intensity of personnel, reduce the pressure of the construction period, and has a higher construction period benefit.

[0071] Social benefits include:

[0072] ① It has improved the split-starting technology of slurry shield, saved a lot of construction time and manpower, further promoted the progress of shield construction technology, and played a certain role in the development of economy and society.

[0073] ② Reduce the mud flow and dirt during the replacement of mud pipelines, which is beneficial to environmental protection, water conservation and ecological management, and has great social benefits for civilized construction on site.

[0074] Application example: Pearl River Delta Water Resources Allocation Project Civil Construction B3 Project Overview:

[0075] The Pearl River Delta Water Resources Allocation Project spans Foshan, Guangzhou, Dongguan and Shenzhen. It takes water from the Liyuzhou water intake of the Xijiang River system and extends eastward through the Gaoxinsha Reservoir, Songmushan Reservoir and Luotian Reservoir to the end point Gongming Reservoir. The main water supply targets are the water-deficient areas of Nansha District, Guangzhou, Shenzhen and Dongguan. The total length of the water transmission line is 113.2km. Section B3 of the Pearl River Delta Water Resources Allocation Project is part of the water transmission trunk line from Gaoxinsha Reservoir to Shaxi high-level water tank. The starting point is the GS04# working well in Huangge Town, Nansha District, Guangzhou. The line is arranged from west to east, passing through the Qingsheng Free Trade Zone from the south, passing through the Lianhuashan Waterway and Shiziyang to the north of the Shiziyang Tunnel of the Guangzhou-Shenzhen-Hong Kong Passenger Dedicated Line and the south of the Nansha Bridge, and entering the GS08# working well in Shatian Town, Dongguan City on the north side of Humen Port.

[0076] The shield section of the B3 section of the Pearl River Delta Water Resources Allocation Project GS07# (DG22#) ~ GS06# (GZ21#) civil construction specifically uses the multifunctional trolley in Example 1 and the construction method in Example 2 to complete the split start of the slurry shield machine.

[0077] The section of GS07# (DG22#) to GS06# (GZ21#) has a mileage range of GS17+158.212 to GS13+988.646, with a total length of 3169.566m. It is lined with prefabricated reinforced concrete segments, with a segment width of 1600mm, a segment thickness of 400mm, an outer diameter of 8300mm, and an inner diameter of 7500mm. The segment concrete strength grade is C55, and the anti-seepage grade is W12. It is assembled with staggered joints using M30 (A4-70 grade) stainless steel bolts. The section split start length is 105m. It is constructed using a slurry shield machine with a diameter of 8650mm. The slurry pipe uses a slurry inlet and outlet pipeline with a diameter of 400mm to realize the transportation of slag by the slurry shield machine. The starting working shaft is a circular vertical shaft structure with an effective operating distance of 17.5m. The shield starts in a split start mode.

[0078] The conventional split-type initial mud pipe takes 3 to 5 hours to replace each time, while the multifunctional operation trolley of the present invention only takes 1 to 2 hours to complete a mud pipe replacement, which can increase the construction efficiency by 1 times and significantly save the construction period.

[0079] The present invention has been described in detail above with reference to the accompanying drawings and embodiments; however, those skilled in the art will appreciate that, without departing from the concept of the present invention, the specific parameters in the above embodiments may be changed, or related components, structures and materials may be replaced by equivalents, thereby forming multiple specific embodiments, which are all common variations of the present invention and will not be described in detail here.

Claims

1. A rapid extension construction method based on a split-starting multifunctional operation trolley of a slurry shield machine, characterized in that: The split-starting multifunctional operation trolley of the slurry shield machine includes: The synchronous grouting mechanism is used to store and inject the mortar required for shield tunneling, and includes a mortar tank, a grouting pump, and a connecting pipe for connecting to the synchronous grouting pipeline of the shield machine; The pipeline replacement mechanism is used to realize the replacement and extension of the mud pipeline, which includes a rotating boom and a mud extension pipeline, wherein the mud extension pipeline includes a mud hard pipe, a transition hose, a hose clamping box, and a hose hanging wheel platform; the mud hard pipe bridges the corresponding shield machine inlet and outlet mud pipe and the transition hose; one end of the transition hose is used to connect the mud hard pipe, and the other end is used to connect the corresponding mud pipe extended in the hole; the hose hanging wheel platform is installed and fixed on one side of the trolley frame via a corresponding support frame to support the hose clamping box; the transition hose is guided and moved backward and forward by the hose clamping box to realize the extension and reset of the mud extension pipeline; the rotating boom is installed at the front end or / and the rear end of the trolley frame via the corresponding support frame to implement the hoisting operation when the mud pipeline is replaced; the pipeline replacement mechanism also includes a roller group installed under the transition hose and the hose clamping box to form a hose sliding channel to guide the hose and reduce the friction of the hose movement; A working platform, used for setting up expansion equipment and / or performing corresponding business operations, which is arranged at the front end and / or the rear end of the platform frame; The main engine room is used for shield machine control. It is arranged between the synchronous grouting mechanism and the pipeline replacement mechanism to control the operation of the shield machine, as well as the implementation of synchronous grouting, secondary grouting, grease injection and / or grouting pipeline replacement; A grease injection mechanism, used to add grease, lubricating grease or / and sealing grease to the shield tail of the shield machine, comprising a grease pump and corresponding connecting pipelines arranged on the working platform; A secondary grouting mechanism, which is composed of a slurry stirring container, a secondary grouting pump and corresponding connecting pipelines; The trolley frame is provided with a corresponding support frame, and the mortar tank and the main engine room are installed at the corresponding positions of the support frame by welding, slots and / or bolts; the bottom of the trolley frame is provided with rail or trackless walking wheels, which are pulled by corresponding traction devices to achieve walking; The rapid extension construction method comprises the following steps: (1) Shield tunneling: After the preparatory work is completed, the slurry circulation starts. According to the established tunneling parameters, the tunnel is advanced to the advancing stroke. Then the tunnel is stopped and the slurry circulation continues for at least 10 minutes before the circulation is stopped. (2) Segment installation: Segments are lowered into the well and transported to the segment assembly area or segment feeder by the segment transport vehicle. After excavation is completed, the segments are installed from the bottom and symmetrically to the top according to the designated segment installation points. Finally, the capping blocks are installed. (3) Mud pipeline extension: After the shield tunneling has completed a certain length and the transition hose in the multifunctional working vehicle has been extended to its limit, the machine is stopped, the circulation is stopped, and the inlet and outlet valves of the mud pipeline near the position of the mud extension pipeline are closed. The joint position of the extension area is depressurized and the slurry is discharged into the mud collection box arranged on the working platform. After the pressure relief is completed, the extension position interface is removed, and the transition hose and the hose clamping box are reset. At the rear, the mud extension pipeline is connected to the inlet and outlet mud pipes in the tunnel and the inlet and outlet mud pipes of the shield machine through the lifting mechanism on the rotating boom, and the pipeline extension is completed; (4) Circulation propulsion: After the mud pipeline is replaced, open the plate valve to start the mud circulation. After the mud inlet and outlet flow is stable, start the propulsion system and propel forward.

2. The rapid extension construction method according to claim 1, characterized in that: The segment transport vehicle comprises a traction and towing seat, a segment rotating tray, a trolley bracket and running wheels.

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