Construction Method for Ultra-Deep Cover and Super-Large Diameter Curved Pipe Jacking

Abstract

The present invention relates to a construction method for super-deep overburden large-caliber extra-long curved pipe jacking, including: a pipe jacking machine, a detachable conversion box, a full-automatic measurement and guiding system, an internal expansion ring water stop device, a ventilation system, and a pipe jacking pipeline; the mud discharge pipe dual-purpose deviation correction technology is adopted, and the mud discharge pipes preset symmetrically at the pipe jacking machine head are utilized. When the pipe jacking machine head dips, deviation correction of the pipe jacking is achieved by injecting slurry and pressurizing at the bottom of the pipe jacking machine head. When floating occurs, the high-confined water outside the pipe is pumped and drained to reduce its buoyancy, thereby achieving deviation correction of the pipe jacking. This technology can flexibly adjust the pressure as needed, with controllable precision, and realizes active loading and unloading outside the pipe while having the function of pumping and draining water.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline construction, and particularly relates to a construction method for super-deep overburden and extra-large diameter curved pipe jacking. Background Technique

[0002] With the continuous and stable growth of China's economy and the further acceleration of the urbanization process, the demand for underground pipelines in China is increasing year by year. Coupled with the enhanced awareness of environmental protection among people, pipe jacking technology will play an increasingly important role in the construction of underground pipelines in China. After years of development, pipe jacking technology has the comprehensive functions of being economical, efficient, and environmentally friendly, and has been widely applied in a large number of practical engineering projects in China.

[0003] As a common construction method for underground pipelines, pipe jacking can cross roads, rivers, railways, surface buildings, underground structures, and various underground pipelines without excavating the surface layer. At the same time, it is not affected by seasonal factors. In the construction of deeply buried pipelines, it can also greatly reduce the amount of earth excavation, improve construction efficiency, reduce project costs and environmental pollution around.

[0004] In the construction of super-deep overburden, extra-large diameter, and extra-long curved pipe jacking, the jacking axis often deviates from the design axis. Moreover, as the pipeline advances forward, the longer the distance, the thinner the air in the pipeline, which is not conducive to the circulation of air in the pipeline. Due to the relatively deep jacking depth, there may be combustible gases such as biogas formed by decaying substances in the stratum. During construction, these gases may seep into the pipeline through the gaps of pipe joints such as the cutter head soil outlet and the relay room, endangering the safety of construction personnel.

[0005] Therefore, in the process of pipeline construction with a long distance in a complex environment, the problems of controlling the jacking posture and the harm of toxic gases in pipe jacking construction need to be solved urgently. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for super-deep overburden and extra-large diameter curved pipe jacking.

[0007] This kind of construction device for super-deep overburden and extra-large diameter curved pipe jacking includes: a pipe jacking machine, a detachable conversion box, a full-automatic measurement and guiding system, an internal expansion ring water stop device, a ventilation system, and a pipe jacking pipeline;

[0008] The pipe jacking machine includes a pipe jacking head and a spoke-type cutter head. Rib plates are welded between the spoke plates of the spoke-type cutter head, and a horn tearing knife and a peripheral shell knife are also provided on the spoke-type cutter head;

[0009] The detachable conversion box includes a screw conveyor and a stirrer, and the pipe jacking machine is connected to the mud mixing box through the screw conveyor;

[0010] The pipe jacking machine head is equipped with a mud discharge pipe with dual functions for deviation correction. The mud discharge pipe with dual functions for deviation correction includes a mud discharge pipe, a grouting pipe, and a pumping and drainage pipe. The grouting pipe is arranged at the lower part of the pipe jacking machine head, and the pumping and drainage pipe is arranged at the upper part of the pipe jacking machine head;

[0011] The internal expansion ring water stop device is arranged at the joint of the pipe sections of the pipe jacking pipeline and includes tie bolts and an internal expansion ring;

[0012] The ventilation system includes a three-lobe Roots blower and a toxic gas detector. The three-lobe Roots blower is installed on the edge of the working well, and the toxic and harmful gas detector is arranged inside the pipe jacking machine.

[0013] Preferably: The detachable conversion box includes a screw conveyor and a stirrer. One water inlet pipe and one mud discharge pipe are arranged on the mud stirring box. The mud in the mud stirring box is transported to the ground through a mud pump; A screen is arranged inside the mud stirring box.

[0014] Preferably: The mud discharge pipe with dual functions for deviation correction further includes a mud discharge pipe, and the mud discharge pipes are symmetrically arranged on the pipe jacking machine head.

[0015] Preferably: The fully automatic measurement and guiding system includes a level, a fixing frame, a steel tape measure, a leveling rod, a total station, and a rear intersection prism. Multiple rear intersection prisms are arranged on the wall of the working well as underground control points; It also includes an automatic measurement total station, a control computer, a prism, and an automatic leveling base.

[0016] Preferably: The internal expansion ring water stop device further includes a rubber plate and a φ42 round steel bolt. Four arc-shaped steel plates are arranged on both sides of the internal expansion ring. The internal expansion ring plate is opened by tie bolts, and the rubber plate is lined below the internal expansion ring plate.

[0017] Preferably: The ventilation system includes a three-lobe Roots blower, a filter, a silencer, a cooler, a PVC ventilation pipe, a bellows hose, a toxic gas detector, and a ground monitoring system. The three-lobe Roots blower is installed on the edge of the well. An air filter and a cooler are installed at the suction port of the three-lobe Roots blower, and a silencer is installed at the air outlet. The toxic and harmful gas detector is arranged inside the pipe jacking machine. The three-lobe Roots blower and the toxic gas detector are connected through a bellows hose; The toxic gas detector is connected to the ground monitoring system; It also includes a centrifugal blower and an exhaust pipe.

[0018] The construction method of this ultra-deep overburden, extra-large diameter, and extra-long curve pipe jacking construction device includes the following steps:

[0019] S1. Preliminary preparation: Prepare the slurry through the high-efficiency sand-carrying agent lubricating and resistance-reducing slurry preparation technology;

[0020] S2. Install and debug the pipe jacking equipment: Connect the pipe jacking machine with a spoke-type cutter head and the detachable conversion box through a screw conveyor, and connect the detachable conversion box to the water inlet pipe;

[0021] S3. Start jacking: Construction is carried out using the principle of earth pressure balance pipe jacking, and the slurry prepared in step S1 is grouted through the grouting pipe for lubrication; at the same time, pipe jacking deviation correction, pipe joint treatment of the pipe jacking, and monitoring of toxic gases in the pipe jacking are carried out. Specifically,

[0022] Pipe jacking deviation correction: A dual-purpose mud discharge pipe deviation correction device is used to correct the diving and floating of the pipe jacking machine head, and at the same time, a fully automatic measurement and guiding system is used to guide the pipe jacking machine;

[0023] Pipe joint treatment of the pipe jacking: A water-stop internal expansion ring is used to seal and stop water between the pipe jacking pipes, and tie bolts are used for connection;

[0024] Monitoring of toxic gases in the pipe jacking: A toxic and harmful gas monitor is linked with the ground monitoring system, and at the same time, ventilation and air exchange are carried out through a three-lobe roots blower and a centrifugal blower;

[0025] S4. Continuously jack until the receiving well.

[0026] Preferably, in step S1: The specific technology for preparing the high-efficiency sand-carrying agent lubricating and drag-reducing slurry is to add a high-efficiency sand-carrying agent in the slurry preparation process. Through indoor tests, the ratio is determined to be 4% bentonite, 0.3% soda ash, 0.2% CMC, and 0.15% high-efficiency sand-carrying agent.

[0027] Preferably, in step S3, the dual-purpose mud discharge pipe deviation correction technology is adopted. When the pipe jacking machine head dives, grouting and pressurization are carried out through the grouting pipe at the bottom of the pipe jacking machine head to achieve pipe jacking deviation correction; when the pipe jacking machine head floats, the high-pressure confined water outside the pipe is drained through the drainage pipe to achieve pipe jacking deviation correction; at the same time, a fully automatic measurement and guiding device is used to guide the pipe jacking machine to jack.

[0028] The beneficial effects of the present invention are:

[0029] 1) The present invention adopts a dual-purpose mud discharge pipe deviation correction device, including a mud discharge pipe, a grouting pipe, and a drainage pipe. By using the symmetrically preset mud discharge pipes of the pipe jacking machine head, when diving occurs, grouting and pressurization are carried out at the bottom of the pipe jacking machine head to achieve pipe jacking deviation correction; when floating occurs, the high-pressure confined water outside the pipe is drained to reduce its buoyancy and achieve pipe jacking deviation correction; this technology can flexibly adjust the pressure as needed, with controllable precision, and realizes active loading and unloading outside the pipe while having the function of drainage.

[0030] 2) The present invention adopts the technology of preparing lubricating and drag-reducing mud with high-efficiency sand-carrying agent, introducing the high-efficiency sand-carrying agent into the lubricating mud, using bentonite, water, soda ash, CMC, and high-efficiency sand-carrying agent as raw materials to prepare a mud mix ratio that meets the requirements of "viscosity not less than 80 s and no segregated water after standing for 24 h"; the present invention uses the above-mentioned mud to reduce the frictional resistance between the pipe and the soil through the grouting process. After lubrication and drag reduction by the grouting process, the jacking distance can be increased, the resistance in the pipe jacking operation can be effectively reduced, and the large-diameter and long-distance pipe jacking can be continuously extended. The method of the present invention has the advantages of low cost, easy implementation of technology, and high drag reduction efficiency.

[0031] 3) The present invention sets up a ventilation system to monitor the concentration of toxic gases in the pipe jacking in real time and give an alarm immediately when it exceeds the limit to prevent toxic and harmful gases from threatening the construction safety. At the same time, the ventilation system is improved by adding equipment such as coolers and filters, and the clean air after filtration, dehumidification, and cooling is then transported to the construction operation surface through the underground air duct; forced ventilation is carried out throughout the whole process of pipe jacking construction. Due to the air pressure difference in the pipeline, the turbid air will flow naturally from the operation surface to the working well, effectively ensuring the air quality of the construction pipeline and the construction safety. Brief Description of the Drawings

[0032] Figure 1 is the construction process flow chart of the present invention;

[0033] Figure 2 is the schematic diagram of the improved cutter head of the pipe jacking machine;

[0034] Figure 3 is the schematic diagram of the detachable conversion box;

[0035] Figure 4 is the schematic diagram of the dual-purpose sludge discharge pipe;

[0036] Figure 5 is the schematic diagram of the elevation transfer of the pipe jacking well;

[0037] Figure 6 is the elevation view of the coordinate transfer;

[0038] Figure 7 is the schematic diagram of the automatic guiding and measuring system;

[0039] Figure 8 is the installation layout drawing of the tie bolts for the pipe joints;

[0040] Figure 9 is the layout drawing of the internal expansion water stop ring;

[0041] Figure 10 is the schematic layout diagram of the ventilation system.

[0042] In the figure: 1 - spoke-type cutter head, 2 - main cutting tool, 3 - horn tearing tool, 4 - leading tool, 5 - peripheral shell tool, 6 - rib plate, 7 - auger, 8 - conveying pipeline, 9 - slurry pump, 10 - screen, 11 - agitator, 12 - water inlet pipeline, 13 - mud mixing tank, 14 - mud discharge pipeline, 15 - pumping pipe, 16 - sandy clay body, 17 - slurry, 18 - jacking pipe, 19 - mud discharge pipe, 20 - grouting pipe, 21 - ground, 22 - fixing bracket, 23 - level, 24 - leveling staff, 25 - back sight point, 26 - front sight point, 27 - steel tape measure, 28 - total station, 29 - rear intersection prism 1, 30 - rear intersection prism 2, 31 - pier, 32 - control computer, 33 - wireless communication, 34 - working shaft, 35 - automatic leveling base, 36 - prism, 37 - automatic measuring total station, 38 - fixed base station, 39 - rubber plate, 40 - internal expansion ring for water stop, 41 - tie bolt, 42 - φ42 round steel bolt, 43 - arc steel plate, 44 - three-lobe roots blower, 45 - filter, 46 - silencer, 47 - exhaust duct, 48 - ground monitoring system, 49 - bellows hose, 50 - centrifugal fan, 51 - PVC reverse air duct, 52 - jacking pipe head, 53 - toxic gas monitor, 54 - cooler. Detailed implementation manners

[0043] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0044] Embodiment 1

[0045] As an embodiment, as Figures 2 to 10 shown, this ultra-deep overburden and extra-large diameter curve jacking pipe construction device includes: a jacking machine, a detachable conversion box, a full-automatic measurement and guiding system, an internal expansion ring water stop device, a ventilation system, and a jacking pipe 18;

[0046] As Figure 2 shown, the jacking machine includes a jacking pipe head 52 and a spoke-type cutter head 1. Rib plates 6 are welded between the spoke plates of the spoke-type cutter head 1, and a horn tearing tool 3 and a peripheral shell tool 5 are also provided on the spoke-type cutter head 1;

[0047] As Figure 3 shown, the detachable conversion box includes an auger 7 and an agitator 11. The jacking machine is connected to the mud mixing tank 13 through the auger 7; the soil cut by the spoke-type cutter head 1 is transported to the mud mixing tank 13 through the auger 7. One 4-inch water inlet pipe 12 and one mud discharge pipe 14 are connected to the mud mixing tank 13. The input muddy water is stirred into slurry and then transported to the ground through the slurry pump 9. A screen 10 is arranged in the mud mixing tank 13 to screen out large-diameter soil blocks.

[0048] As Figure 4 shown, a dual-purpose deviation rectification device for the sludge discharge pipe is provided on the pipe jacking machine head 52. The dual-purpose deviation rectification device for the sludge discharge pipe includes a sludge discharge pipe 19, a grouting pipe 20, and a pumping and drainage pipe 15. The grouting pipe 20 is arranged at the lower part of the pipe jacking machine head 52, and the pumping and drainage pipe 15 is arranged at the upper part of the pipe jacking machine head 52; the sludge discharge pipes 19 are symmetrically arranged on the pipe jacking machine head 52. When the pipe jacking machine is tunneling in the sandy clay layer 16, it is easy to have the phenomenon of "diving". Deviation rectification is completed by injecting slurry and pressurizing through the grouting pipe 20 into the bottom grouting port. When the pipe jacking machine floats due to being disturbed in the silty sand soil body, the high-pressure water outside the pipe is pumped and drained through the pumping and drainage pipe 15 to reduce its buoyancy and complete deviation rectification.

[0049] As Figure 8 and Figure 9 shown, an internal expansion ring water stop device is arranged at the joint of the pipe sections of the pipe jacking pipe 18, including a tension bolt 41 and an internal expansion ring 40; the internal expansion ring water stop device further includes a rubber plate 39 and a φ42 round steel bolt 42. Four arc-shaped steel plates 43 are arranged on both sides of the internal expansion ring 40. The internal expansion ring plate 40 is opened by the tension bolt 41, and the rubber plate 39 is lined under the internal expansion ring plate 40.

[0050] As Figure 10 shown, the ventilation system includes a three-lobe Roots blower 44, a filter 45, a silencer 46, a cooler 54, a PVC ventilation pipe 51, a bellows hose 49, a toxic gas detector 53, and a ground monitoring system 48. The three-lobe Roots blower 44 is installed on the well edge. An air filter 45 and a cooler 54 are installed at the suction port of the three-lobe Roots blower 44, and a silencer 46 is installed at the air outlet. The toxic and harmful gas detector 53 is arranged inside the pipe jacking machine. The three-lobe Roots blower 44 and the toxic gas detector 53 are connected through the bellows hose 49; the toxic gas detector 53 is connected to the ground monitoring system 48; a centrifugal blower 50 and an exhaust pipe 47 are also included. A silencer 46 is installed at the air outlet of the blower to reduce the noise emitted by the system. The clean air after filtration, dehumidification, and cooling is then transported to the construction operation surface through the bellows hose 49. A toxic and harmful gas detector 53 is arranged inside the pipe jacking machine to monitor and record the air quality inside the pipe. When the toxic and harmful gas and oxygen content exceed the standard, an audible and visual alarm will be issued. The toxic gas detector 53 is linked with the ground monitoring system 48, and data reminders on the ground improve work efficiency and ensure safety.

[0051] As Figures 5 to 7As shown in the figure, the full-automatic measurement and guiding system includes a level 23, a fixing bracket 22, a steel tape measure 27, a staff gauge 24, a total station 28, and a resection prism 29. A plurality of resection prisms 29 are arranged on the wall of the working shaft 34. By precisely measuring their coordinates, they are used as underground control points. During the jacking construction process, the automatic survey station underground uses these control points and the resection method for orientation to transmit coordinates into the pipeline. The elevation is transmitted by hanging a steel tape measure 27 to measure the elevation of the temporary bench mark underground, which is used as the elevation control point for jacking construction. It also includes an automatic measurement total station 37, a control computer 32, a prism 36, and an automatic leveling base 35. The coordinate measurement function of the automatic measurement total station 37 is used to control the direction of the jacked pipe in real time; the trigonometric leveling measurement function of the total station 28 is used to control the elevation of the pipeline in real time to maintain the designed slope of the pipeline; the control computer 32 and software are used to obtain real-time measurement data, draw the deviation trajectory, and display the current mileage and the center position of the jacking pipe head 52 in real time.

[0052] Embodiment 2

[0053] As another embodiment, the construction method of the ultra-deep overburden, super-large diameter, and extra-long curved jacked pipe construction device in Embodiment 1 includes the following steps:

[0054] S1. Preliminary preparation and test lofting: The construction site is compacted and leveled without water accumulation. By replacing and filling with sand and gravel, the bearing capacity of the original soil foundation is improved. The site has been hardened and can meet the stacking of materials and equipment during the jacking process.

[0055] Preparation work: One 45t gantry crane is arranged within the site for unloading, flipping, and hoisting pipe sections into the well. The area within the span of the gantry crane is used as the storage site for pipes. The span of the gantry crane is selected to be 22m.

[0056] Preparation of high-efficiency sand-carrying agent lubricating and drag-reducing mud: Bentonite, water, soda ash, CMC, and high-efficiency sand-carrying agent are used as raw materials. According to the actual hydrogeological conditions, based on the initial formulation design, by controlling the change of a single component, performance tests are carried out on each group of muds, and the optimal content of each component of the mud is gradually explored to prepare a mud mix ratio that meets the actual requirements; through laboratory tests, it is determined that the mix ratio is 4% bentonite, 0.3% soda ash, 0.2% CMC, and 0.15% high-efficiency sand-carrying agent. This mix ratio requires the least amount of bentonite and has the lowest mud filtration loss, meeting the requirements of a viscosity not lower than 80s and no segregation water with a segregation water rate of 0 after standing for 24h.

[0057] S2. Install and debug the pipe jacking equipment: Adopt the combined improvement technology of pipe jacking machines, select the large cutter head earth pressure balance pipe jacking machine, improve the cutter head to better cope with complex geology, and adopt a detachable conversion box. The conversion box is connected to the water inlet pipe 12, and the input muddy water is converted into slurry to improve the jacking efficiency.

[0058] S3. Start jacking: The pipe jacking machine selects the large cutter head earth pressure balance pipe jacking machine, adopts full-face cutter head tunneling, and the auger 7 discharges soil. The construction is carried out by using the principle of earth pressure balance pipe jacking. Through the combination principle of the soil pressure in the soil bin and the pressure of the pipe jacking machine tunneling face, the disturbance of the soil body at the front end of the spoke-type cutter head 1 is controlled to achieve the pressure balance of the soil body at the front end of the spoke-type cutter head 1. And the slurry prepared in step S1 is grouted and lubricated through the grouting pipe 20.

[0059] During jacking, continuously carry out pipe jacking deviation correction, pipe jacking pipeline joint treatment and pipe jacking toxic gas monitoring. Specifically:

[0060] Pipe jacking deviation correction: Adopt a dual-purpose mud discharge pipe deviation correction device, utilize the symmetrical mud discharge pipe 19 pipeline, and add a grouting pipe 20 and a drainage pipe 15. When there is a nose dive, grout and pressurize through the grouting pipe 20 at the bottom of the pipe jacking machine head 52 to achieve pipe jacking deviation correction; when there is floating, drain the high-confined water outside the pipe to reduce its buoyancy and achieve pipe jacking deviation correction, and finally form a long-distance pipe jacking grouting pipeline system. At the same time, adopt the full-automatic guiding measurement technology, and equip the pipe jacking machine with a laser guiding system to guide the pipe jacking machine to jack, reducing the manual measurement error.

[0061] Pipe jacking pipeline joint technology: During the pipe jacking process, the loss of muddy water in the joints of the pipe jacking pipeline 18 and the relay room joints will cause formation loss. For the places where the pipe joints have a relatively large opening, use a water stop internal expansion ring 40 for sealing and water stop to prevent the influx of soil and water outside the tunnel. The connection is carried out in the form of tie bolts 41 at the pipeline part to prevent the pipe jacking pipeline 18 from becoming disconnected.

[0062] Pipe jacking toxic gas monitoring: During the ultra-long-distance pipe jacking process, it is particularly important to monitor the content of toxic and harmful gases and oxygen in the pipe jacking pipeline 18. Use a toxic and harmful gas monitor 53, which is linked with the ground monitoring system 48, and data reminders on the ground to improve work efficiency. At the same time, improve the ventilation system, carry out ventilation and air exchange through a three-lobe roots blower 44 and a centrifugal fan 50, and add equipment such as a cooler 54 and a filter 45. The clean air after filtering, dehumidifying and cooling is then transported to the construction operation surface through the underground air duct. Forced ventilation is carried out throughout the whole process of pipe jacking construction to ensure the air quality in the pipe jacking pipeline 18 and ensure the safety of construction personnel.

[0063] S4. Continuously jack until the receiving well.

[0064] This construction method can also first install and commission the pipe jacking equipment, and then prepare the high-efficiency sand-carrying agent lubricating and drag-reducing mud, as Figure 1 shown.

Claims

1. A super-deep soil-covering, super-large-diameter, super-long curved pipe jacking construction device, It is characterized in that include: Pipe jacking machine, detachable conversion box, fully automatic measuring guide system, internal expansion ring water stop device, ventilation system and pipe jacking pipeline (18); The pipe jacking machine comprises a pipe jacking machine head (52) and a spoke-type cutter disc (1), rib plates (6) are welded between spoke plates of the spoke-type cutter disc (1), and the spoke-type cutter disc (1) is also provided with a horn tearing knife (3) and a peripheral shell knife (5); The detachable conversion box comprises a screw machine (7) and a stirrer (11), and the pipe jacking machine is connected to the mud stirring box (13) via the screw machine (7); A mud discharge pipe dual-purpose deviation correction device is provided on the pipe jacking machine head (52), and the mud discharge pipe dual-purpose deviation correction device comprises a mud discharge pipe (19), a grouting pipe (20) and a pumping pipe (15), wherein the grouting pipe (20) is arranged at the lower part of the pipe jacking machine head (52), and the pumping pipe (15) is arranged at the upper part of the pipe jacking machine head (52); The inner expansion ring water-stopping device is arranged at the pipe joint connection of the jacking pipe (18), and comprises a tension bolt (41) and a water-stopping inner expansion ring (40); The ventilation system comprises a three-leaf Roots blower (44) and a toxic and harmful gas detector (53); the three-leaf Roots blower (44) is installed on the edge of the working well (34); and the toxic and harmful gas detector (53) is arranged in the pipe jacking machine.

2. The ultra-deep soil-covering, ultra-large-diameter, ultra-long curved pipe jacking construction device according to claim 1, Features: The detachable conversion box comprises a screw machine (7) and a stirrer (11); a water inlet pipe (12) and a mud discharge pipe (14) are provided on the mud mixing box (13); the mud in the mud mixing box (13) is transported to the ground through a mud pump (9); and a screen (10) is provided in the mud mixing box (13).

3. The ultra-deep soil-covering, ultra-large-diameter, ultra-long curved pipe jacking construction device according to claim 1, Features: The mud discharge pipe (19) is symmetrically arranged on the pipe jacking machine head (52).

4. The ultra-deep soil-covering, ultra-large-diameter, ultra-long curved pipe jacking construction device according to claim 1, Features: The fully automatic measurement and guidance system comprises a level (23), a fixing frame (22), a steel tape measure (27), a tower ruler (24), a total station (28) and a rear intersection prism (29), wherein a plurality of rear intersection prisms (29) are arranged on the wall of a working well (34) as underground control points; and also comprises an automatic measurement total station (37), a control computer (32), a prism (36) and an automatic leveling base (35).

5. The ultra-deep soil-covering, ultra-large-diameter, ultra-long curved pipe jacking construction device according to claim 1, Features: The inner expansion ring water-stopping device further comprises a rubber plate (39) and φ42 round steel bolts (42). Four arc-shaped steel plates (43) are provided on both sides of the water-stop inner expansion ring (40). The water-stop inner expansion ring (40) is opened by means of tension bolts (41). The rubber plate (39) is arranged below the water-stop inner expansion ring (40).

6. The ultra-deep soil-covering, ultra-large-diameter, ultra-long curved pipe jacking construction device according to claim 1, Features: The ventilation system includes a three-lobe Roots blower (44), an air filter (45), a silencer (46), an exhaust duct (47), a cooler (54), a PVC ventilation duct (51), a bellows hose (49), a centrifugal fan (50), a toxic and harmful gas detector (53), and a ground monitoring system (48). The three-lobe Roots blower (44) is installed on the well edge. An air filter (45) and a cooler (54) are installed at the suction port of the three-lobe Roots blower (44), and a silencer (46) is installed at the air outlet. The three-lobe Roots blower (44) and the toxic and harmful gas detector (53) are connected through the bellows hose (49); the toxic and harmful gas detector (53) is connected to the ground monitoring system (48).

7. The construction method of the ultra-deep overburden, super-large diameter, and extra-long curve pipe jacking construction device according to any one of claims 1-6, characterized in that, it includes the following steps: S1. Preliminary preparation: Prepare the slurry by the lubricating and drag-reducing slurry preparation method with a high-efficiency sand-carrying agent; S2. Install and debug the pipe jacking equipment: Connect the pipe jacking machine with a spoke-type cutter head (1) and the detachable conversion box through the auger (7), and connect the detachable conversion box to the water inlet pipe (12); S3. Start pipe jacking: Construct using the earth pressure balance pipe jacking principle, and inject and lubricate the slurry prepared in step S1 through the grouting pipe (20); At the same time, conduct pipe jacking deviation correction, pipe jacking pipeline joint treatment, and pipe jacking toxic gas monitoring. Specifically, Pipe jacking deviation correction: Use the dual-purpose drainage pipe deviation correction device to correct the diving and floating of the pipe jacking machine head (52), and at the same time use the full-automatic measurement and guidance system to guide the pipe jacking machine; Pipe jacking pipeline joint treatment: Use a water-stop internal expansion ring (40) to seal and stop water between the pipe jacking pipelines (18), and connect them with tie bolts (41); Pipe jacking toxic gas monitoring: Use the toxic and harmful gas detector (53) to be linked with the ground monitoring system (48), and at the same time conduct ventilation and air change through the three-lobe Roots blower (44) and the centrifugal fan (50); S4. Continuously jack the pipe until the receiving well is reached.

8. The construction method of the ultra-deep overburden, super-large diameter, and extra-long curve pipe jacking construction device according to claim 7, characterized in that, in step S1: The specific method for preparing the lubricating and drag-reducing slurry with a high-efficiency sand-carrying agent is to add a high-efficiency sand-carrying agent during slurry preparation. Through indoor tests, the determined ratio is 4% bentonite, 0.3% soda ash, 0.2% CMC, and 0.15% high-efficiency sand-carrying agent.

9. The construction method of the ultra-deep overburden, super-large diameter, and extra-long curve pipe jacking construction device according to claim 7, characterized in that, in step S3, using the dual-purpose drainage pipe deviation correction technology, when the pipe jacking machine head (52) dives, inject and pressurize through the grouting pipe (20) at the bottom of the pipe jacking machine head (52) to achieve deviation correction of the pipe jacking machine head (52); when the pipe jacking machine head (52) floats, drain the high-pressure confined water outside the pipe through the drain pipe (15) to achieve pipe jacking deviation correction; at the same time, use the full-automatic measurement and guidance device to guide the pipe jacking machine to jack.

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