Large-caliber tube withdrawal device and tube withdrawal method

Abstract

The present invention relates to the technical field of underground pipeline construction, and provides a large-diameter pipe withdrawal device and a pipe withdrawal method. In the large-diameter pipe withdrawal device, the machine head connection part is connected to the inside of the pipe jacking machine head. The power jacking part is slidably connected to the base guide rail of the working shaft. One end of the traction member is connected to the machine head connection part. The other end of the traction member extends from the pipe jacking machine head through each pipe withdrawal section to the working shaft and is connected to the power jacking part. The power device is used to drive the power jacking part to slide along the base guide rail, so as to drive the traction member to drag the pipe jacking machine head to extrude each pipe withdrawal section and withdraw the pipe into the working shaft. Through this structural arrangement, the original power device is installed in reverse, so that the power device pushes the power jacking part in the reverse direction. Furthermore, the power jacking part drives the traction member to drag each pipe withdrawal section and the pipe jacking machine head out of the pipe withdrawal pipeline one by one through the machine head connection part. The structure of the large-diameter pipe withdrawal device is relatively simple and the construction is relatively convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of underground pipeline construction, and particularly to a large-diameter pipe withdrawal device and a pipe withdrawal method. Background Art

[0002] The pipe jacking method is a common underground pipeline construction method. It uses a pipe jacking machine to excavate and advance in the front, and a hydraulic jacking device at the rear to jack each section of pipe into the formation one by one to form an underground pipeline. During the process of constructing an underground pipeline using the pipe jacking method, when an obstacle that cannot be cleared is encountered in front of the pipe jacking, it is necessary to withdraw the pipe sections in the pipeline from the pipeline opening. At present, there is an urgent need to provide a large-diameter pipe withdrawal device with a simple structure and convenient construction. Summary of the Invention

[0003] The present invention aims to provide a large-diameter pipe withdrawal device with a simple structure and convenient construction and a corresponding pipe withdrawal method.

[0004] According to a first aspect of the present invention, there is provided a large-diameter pipe withdrawal device, including a head connection part, a power jacking part, a power device and a traction member.

[0005] Wherein, the head connection part is connected to the inside of the pipe jacking machine head. The power jacking part is slidably connected to the base guide rail of the working shaft. One end of the traction member is connected to the head connection part, and the other end of the traction member extends into the working shaft through each pipe section to be withdrawn and is connected to the power jacking part. The power device is used to drive the power jacking part to slide along the base guide rail, so as to drive the traction member to drag the pipe jacking machine head to extrude each pipe section to be withdrawn into the working shaft.

[0006] According to the large-diameter pipe withdrawal device provided by the present invention, the head connection part includes a first I-beam cross beam and a second I-beam cross beam. The first I-beam cross beam and the second I-beam cross beam are arranged at intervals up and down, and both are horizontally connected to the inside of the pipe jacking machine head.

[0007] The power jacking part includes a third I-beam cross beam and a fourth I-beam cross beam. The third I-beam cross beam is correspondingly arranged with the first I-beam cross beam. The fourth I-beam cross beam is correspondingly arranged with the second I-beam cross beam. The third I-beam cross beam is slidably connected to the base guide rail. The fourth I-beam cross beam is connected to the third I-beam cross beam.

[0008] A traction member is respectively and correspondingly connected between the two ends of the first I-beam cross beam and the two ends of the third I-beam cross beam. A traction member is respectively and correspondingly connected between the two ends of the second I-beam cross beam and the two ends of the fourth I-beam cross beam. Each traction member is parallel to the central axis of the pipe to be withdrawn.

[0009] According to the large-diameter pipe withdrawal device provided by the present invention, the power device includes a jack. One jack is arranged correspondingly at both ends of the third I-beam crossbeam and at both ends of the fourth I-beam crossbeam. One end of each jack is connected to the outer wall of the opening of the pipe withdrawal pipe through a reinforcing steel plate and a fastener, and the other end of each jack is arranged correspondingly to the end of the third I-beam crossbeam or the end of the fourth I-beam crossbeam. Each jack can press and drive the third I-beam crossbeam and the fourth I-beam crossbeam to move synchronously on the base guide rail along a direction parallel to the central axis of the pipe withdrawal pipe.

[0010] According to the large-diameter pipe withdrawal device provided by the present invention, the traction member includes a steel wire rope, and the steel wire rope includes multiple rope sections, and both ends of each rope section are bent and fixed by buckles to form a connecting ring.

[0011] Wherein, the rope bodies of adjacent sections are connected by a U-shaped lock. The U-shaped lock includes a U-shaped hook and a locking bolt. The adjacent connecting rings of the rope bodies of adjacent sections are respectively sleeved on the U-shaped hook. The locking bolt is penetrated and connected between the two ends of the U-shaped hook so that the adjacent connecting rings of the rope bodies of adjacent sections are locked on the U-shaped hook.

[0012] The rope bodies at the head end and the tail end are respectively connected with the machine head connecting part and the power pressing part through corresponding connecting rings.

[0013] The head connection part and the power pressing part are both provided with arc-shaped transition pieces at the sleeve connection positions with the connecting ring. The arc-shaped transition piece is provided with a transverse limit groove. The inner ring of the connecting ring is provided with a limit clamp ring. One side of the limit clamp ring is fitted and covered on the connecting ring, and the other side of the limit clamp ring is fitted and clamped in the transverse limit groove to limit the transverse movement of the wire rope.

[0014] According to the large-diameter pipe withdrawal device provided by the present invention, the power pressing part further includes a vertical connecting rod and an anti-overturning inclined rod. The vertical connecting rod is supported and connected between the third I-beam cross beam and the fourth I-beam cross beam. One end of the anti-overturning inclined rod is connected to the fourth I-beam cross beam, and the other end of the anti-overturning inclined rod extends to a side away from the jack and is slidably connected to the base guide rail.

[0015] According to the large-diameter pipe withdrawal device provided by the present invention, the large-diameter pipe withdrawal device also includes drainage equipment, grouting equipment and monitoring equipment.

[0016] Wherein, the drainage equipment includes a drainage pump and a drainage pipeline. The drainage pipeline extends to the interior of the pipe jacking machine head and communicates with the pipe withdrawal space at the front end of the pipe jacking machine head. The drainage pump is connected to the drainage pipeline.

[0017] The grouting equipment includes a grouting pump and a grouting pipe. The grouting pipeline extends into the interior of the head of the pipe jacking machine and communicates with the pipe withdrawal space at the front end of the head of the pipe jacking machine. The grouting pump is connected to the grouting pipe.

[0018] The monitoring equipment includes a pressure detection device and multiple cameras. The pressure detection device is installed on the outer side of the head of the pipe jacking machine. The pressure detection device is used to monitor the collapse state of the pipe withdrawal space. The monitoring range of the camera covers at least the head connection part, the power jacking part, the traction member, the power device and the working shaft.

[0019] According to the second aspect of the present invention, there is provided a pipe withdrawal method for performing a pipe withdrawal operation using the large-diameter pipe withdrawal device as described above, including:

[0020] S1: Arrange and install the head connection part, the power jacking part and the power device;

[0021] S2: Connect the traction member between the head connection part and the power jacking part;

[0022] S3: Start the power device, and the power device drives the power jacking part to drive the traction member to drag the head of the pipe jacking machine to the side away from the pipe withdrawal pipeline, so that the head of the pipe jacking machine extrudes each pipe withdrawal pipe joint towards the outside of the pipe withdrawal pipeline until the pipe withdrawal pipe joint at the tail end completely moves into the working shaft, and then turn off the power device;

[0023] S4: Use a hoisting device to hoist the pipe withdrawal pipe joint that has completely moved into the working shaft to the outside of the working shaft;

[0024] S5: Adjust the length of the traction member and connect it between the head connection part and the power jacking part;

[0025] Repeat the steps of S3 - S5 to withdraw each pipe withdrawal pipe joint from the pipe withdrawal pipeline one by one along the direction from the tail end to the head end of the pipe jacking pipeline and hoist it to the outside of the working shaft.

[0026] According to the pipe withdrawal method provided by the present invention, in the step of S1, it further includes arranging a pressure detection device on the outer side of the head of the pipe jacking machine and arranging cameras in the large-diameter pipe withdrawal device and the working shaft.

[0027] In the step of S2, it further includes injecting lubricating slurry between the side wall of the head of the pipe jacking machine and the side wall of the pipe withdrawal pipeline, and between the side wall of each pipe withdrawal pipe joint and the side wall of the pipe withdrawal pipeline respectively through the grouting holes on the side wall of the head of the pipe jacking machine and the grouting holes on the side wall of each pipe withdrawal pipe joint.

[0028] According to the pipe withdrawal method provided by the present invention, in step S3, when the jacking machine head and each pipe withdrawal pipe joint move outward, the drainage pump and the grouting pump are turned on to drain the water in the pipe withdrawal space to the outside of the working shaft and backfill the pipe withdrawal space with slurry;

[0029] During the process of the jacking machine head and each pipe withdrawal pipe joint moving outward, the power device needs to be intermittently started and stopped so that the single continuous moving distance of the jacking machine head and each pipe withdrawal pipe joint does not exceed 40 cm.

[0030] According to the pipe withdrawal method provided by the present invention, the pipe withdrawal method further includes:

[0031] S6: After the first pipe withdrawal pipe joint is hoisted to the outside of the working shaft, adjust the length of the traction member and connect it between the head connection part and the power jacking part. Start the power device, and the power device drives the power jacking part to drive the traction member to drag the jacking machine head to the outside of the pipe withdrawal pipeline. At the same time, turn on the grouting pump to backfill the remaining pipe withdrawal space at the front end of the jacking machine head with cement slurry;

[0032] S7: After the jacking machine head completely moves to the working shaft, use the hoisting device to hoist the jacking machine head to the outside of the working shaft;

[0033] S8: Drill a reinforcement grouting hole at the position of the pipe withdrawal pipeline opening, and grout and reinforce the position of the pipe withdrawal pipeline opening through the reinforcement grouting hole;

[0034] S9: Drill a reinforcement grouting hole from the ground to the backfilled slurry section of the pipe withdrawal pipeline, and grout and reinforce the backfilled slurry section of the pipe withdrawal pipeline through the reinforcement grouting hole.

[0035] In the large-diameter pipe withdrawal device provided by the present invention, a machine head connection part is connected to the stiffening rib plate inside the machine head of the pipe jacking machine. A power jacking part is slidably installed on the base guide rail in the working shaft. The sliding direction of the power jacking part is parallel to the central axis of the pipe withdrawal pipeline. A traction member is connected between the machine head connection part and the power jacking part. The power device used in the pipe withdrawal operation and the power device used in the pipe jacking operation are the same power device, except that the power output directions are opposite. Specifically, during pipe jacking construction, the power device is installed on the reaction wall on the opposite side of the pipe opening so as to jack the pipe section into the pipe jacking pipeline. During the pipe withdrawal operation, the power device is installed on the outer wall of the pipe opening of the pipe withdrawal pipeline so as to output the driving force in the opposite direction, that is, to output the jacking force to the side away from the pipe withdrawal pipeline. The power device can jack the power jacking part, so that the power jacking part drives the traction member to drag the machine head of the pipe jacking machine and each pipe withdrawal section to move outward along the central axis of the pipe withdrawal pipeline at the same time. When the last pipe withdrawal section, that is, the outermost pipe withdrawal section, completely moves into the working shaft, the pipe withdrawal section is hoisted outside the working shaft by a hoisting device. Thus, the process is continuously repeated until the first pipe withdrawal section, that is, the innermost pipe withdrawal section, and the machine head of the pipe jacking machine both withdraw from the pipe withdrawal pipeline.

[0036] With this structural arrangement, the machine head connection part is connected inside the machine head of the pipe jacking machine, the power jacking part is installed on the base guide rail in the working shaft, and a traction member is connected between the machine head connection part and the power jacking part. The original power device is installed in the reverse direction, so that the power device pushes the power jacking part in the reverse direction. Furthermore, the power jacking part drives the traction member to drag each pipe withdrawal section and the machine head of the pipe jacking machine out of the pipe withdrawal pipeline one by one. The structure of this large-diameter pipe withdrawal device is relatively simple and the construction is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a partial structural schematic diagram of the large-diameter pipe withdrawal device provided by the present invention Figure 1 ;

[0039] Figure 2 It is a partial structural schematic diagram of the large-diameter pipe withdrawal device provided by the present invention Figure 2 ;

[0040] Figure 3 It is a schematic flow chart of the pipe withdrawal method provided by the present invention;

[0041] Reference numerals:

[0042] 100, traction member; 200, working shaft; 300, base guide rail; 401, first I-beam crossbeam; 402, second I-beam crossbeam; 403, third I-beam crossbeam; 404, fourth I-beam crossbeam; 405, vertical connecting rod; 406, anti-overturning diagonal rod; 407, arc transition member; 500, jack; 501, reinforcement steel plate; 601, pipe-retreating pipe section; 602, pipe jacking machine head; 700, external wall of the hole; 800, grouting pump. Specific implementation manners

[0043] The following further describes in detail the implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying 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 to the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0048] The following will describe Figures 1 to 3 the large-diameter pipe withdrawal device and pipe withdrawal method provided by the present invention. It should be understood that the following is only a schematic implementation manner of the present invention and does not constitute any special limitation to the present invention.

[0049] An embodiment of the first aspect of the present invention provides a large-diameter pipe withdrawal device. As Figure 1 and Figure 2 shown, the large-diameter pipe withdrawal device includes: a head connection part, a power pressing part, a power device, and a traction member 100.

[0050] Among them, the head connection part is connected to the inside of the pipe jacking machine head 602. The power pressing part is slidably connected to the base guide rail 300 of the working shaft 200. One end of the traction member 100 is connected to the head connection part, and the other end of the traction member 100 extends from the pipe jacking machine head 602 through each pipe withdrawal section 601 into the working shaft 200 and is connected to the power pressing part. The power device is used to drive the power pressing part to slide along the base guide rail 300, so as to drive the traction member 100 to drag the pipe jacking machine head 602 to extrude each pipe withdrawal section 601 to withdraw the pipe into the working shaft 200.

[0051] In the large-diameter pipe withdrawal device provided by the present invention, a machine head connection part is connected to the reinforcing rib plate inside the machine head 602 of the pipe jacking machine. A power jacking part is slidably installed on the base guide rail 300 in the working shaft 200. The sliding direction of the power jacking part is parallel to the central axis of the pipe withdrawal pipeline. A traction member 100 is connected between the machine head connection part and the power jacking part. The power device used in the pipe withdrawal operation and the power device used in the pipe jacking operation are the same power device, except that the power output directions are opposite. Specifically, during pipe jacking construction, the power device is installed on the reaction wall on the opposite side of the pipe opening to jack the pipe section into the pipe jacking pipeline. During the pipe withdrawal operation, the power device is installed on the outer wall 700 of the pipe opening of the pipe withdrawal pipeline to output driving force in the opposite direction, that is, to output jacking force to the side away from the pipe withdrawal pipeline. The power device can jack the power jacking part, so that the power jacking part drives the traction member 100 to drag the machine head 602 of the pipe jacking machine and each pipe withdrawal section 601 to move outward along the central axis of the pipe withdrawal pipeline at the same time. When the end pipe withdrawal section 601, that is, the outermost pipe withdrawal section 601, completely moves into the working shaft 200, the pipe withdrawal section 601 is hoisted outside the working shaft 200 by a hoisting device. Thus, it is continuously repeated until the first pipe withdrawal section 601, that is, the innermost pipe withdrawal section 601, and the machine head 602 of the pipe jacking machine both withdraw from the pipe withdrawal pipeline.

[0052] Through this structural arrangement, the machine head connection part is connected inside the machine head 602 of the pipe jacking machine, the power jacking part is installed on the base guide rail 300 in the working shaft 200, and the traction member 100 is connected between the machine head connection part and the power jacking part. The original power device is installed in the reverse direction, so that the power device pushes the power jacking part in the reverse direction. Furthermore, the power jacking part drives the traction member 100 to drag each pipe withdrawal section 601 and the machine head 602 of the pipe jacking machine out of the pipe withdrawal pipeline one by one. The structure of this large-diameter pipe withdrawal device is relatively simple and the construction is relatively convenient.

[0053] In an embodiment of the present invention, the machine head connection part includes a first I-beam cross beam 401 and a second I-beam cross beam 402. The first I-beam cross beam 401 and the second I-beam cross beam 402 are arranged at intervals up and down, and both are horizontally connected to the inside of the machine head 602 of the pipe jacking machine.

[0054] The power jacking part includes a third I-beam cross beam 403 and a fourth I-beam cross beam 404. The third I-beam cross beam 403 is correspondingly arranged with the first I-beam cross beam 401. The fourth I-beam cross beam 404 is correspondingly arranged with the second I-beam cross beam 402. The third I-beam cross beam 403 is slidably connected to the base guide rail 300, and the fourth I-beam cross beam 404 is connected to the third I-beam cross beam 403.

[0055] One traction member 100 is respectively and correspondingly connected between the two ends of the first I-beam crossbeam 401 and the two ends of the third I-beam crossbeam 403. One traction member 100 is respectively and correspondingly connected between the two ends of the second I-beam crossbeam 402 and the two ends of the fourth I-beam crossbeam 404. Each traction member 100 is parallel to the central axis of the pipe withdrawing pipeline.

[0056] Further, in an embodiment of the present invention, the power device includes a jack 500. One jack 500 is respectively arranged at the two ends of the third I-beam crossbeam 403 and the two ends of the fourth I-beam crossbeam 404. One end of each jack 500 is respectively connected to the outer wall 700 of the opening of the pipe withdrawing pipeline through a reinforcing steel plate 501 and fasteners, and the other end of each jack 500 is respectively arranged at the end of the third I-beam crossbeam 403 or the end of the fourth I-beam crossbeam 404. Each jack 500 can jack and drive the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 to move synchronously along the direction parallel to the central axis of the pipe withdrawing pipeline on the base guide rail 300.

[0057] Furthermore, in an embodiment of the present invention, the power jacking part further includes a vertical connecting rod 405 and an anti-overturning diagonal rod 406. The vertical connecting rod 405 is supported and connected between the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404. One end of the anti-overturning diagonal rod 406 is connected to the fourth I-beam crossbeam 404, and the other end of the anti-overturning diagonal rod 406 extends to the side away from the jack 500 and is slidably connected to the base guide rail 300.

[0058] Specifically, as Figure 1 shown, both the first I-beam crossbeam 401 and the second I-beam crossbeam 402 are arranged horizontally. And both the first I-beam crossbeam 401 and the second I-beam crossbeam 402 are perpendicular to the central axis of the pipe withdrawing pipeline. The first I-beam crossbeam 401 is located below the second I-beam crossbeam 402. Both ends of the first I-beam crossbeam 401 and the second I-beam crossbeam 402 are welded and connected to the reinforcing ribs inside the jacking machine head 602. As Figure 2 shown, the third I-beam crossbeam 403 is correspondingly arranged with the first I-beam crossbeam 401, and the fourth I-beam crossbeam 404 is correspondingly arranged with the second I-beam crossbeam 402. That is to say, the third I-beam crossbeam 403 and the first I-beam crossbeam 401 are parallel to each other and are at the same horizontal height; the fourth I-beam crossbeam 404 and the second I-beam crossbeam 402 are parallel to each other and are at the same horizontal height.

[0059] Inside the working shaft 200, a base guide rail 300 is arranged along the direction parallel to the central axis of the pipe-withdrawal pipeline. The base guide rail 300 is applicable to both the pipe-jacking construction operation and the pipe-withdrawal construction operation. The third I-beam crossbeam 403 is slidably connected to the base guide rail 300. The fourth I-beam crossbeam 404 is connected to the third I-beam crossbeam 403 through a vertical connecting rod 405. The power jacking part further includes an anti-overturning diagonal rod 406. One end of the anti-overturning diagonal rod 406 is connected to the fourth I-beam crossbeam 404, and the other end is slidably connected to the base guide rail 300. Thus, an anti-overturning triangular frame is formed in the pipe-withdrawal direction for the power jacking part to prevent the power jacking part from overturning along the side away from the pipe-withdrawal pipeline. In addition, in order to enhance the strength of the power jacking part, a reinforcing crossbar can also be connected between the lower end of the anti-overturning diagonal rod 406 and the third I-beam crossbeam 403.

[0060] Each jack 500 is arranged on the outer wall 700 of the pipe-withdrawal pipeline opening. The installation positions of each jack 500 should not interfere with the pipe-withdrawal process of the pipe-withdrawal pipe section 601. Specifically, four jacks 500 are respectively arranged corresponding to the two end parts of the third I-beam crossbeam 403 and the two end parts of the fourth I-beam crossbeam 404. For example, a reinforcing steel plate 501 is respectively installed on both sides of the outer wall 700 of the pipe-withdrawal pipeline opening. The outer cylinder parts of the two jacks 500 on the same side are respectively connected to the outer wall 700 of the pipe-withdrawal pipeline opening through fasteners and the same reinforcing steel plate 501 to disperse the reaction force exerted by the jacks 500 on the outer wall 700 of the pipe-withdrawal pipeline opening. The jacking rods of each jack 500 can respectively extend corresponding to the two ends of the third I-beam crossbeam 403 and the two ends of the fourth I-beam crossbeam 404. For example, in order to adapt to the outer wall structure shape of the pipe-withdrawal pipeline opening, the reinforcing steel plate 501 can be set as a trapezoidal steel plate. The thickness of the reinforcing steel plate 501 is 10 cm, the upper base of the reinforcing steel plate 501 is 50 cm, the lower base is 100 cm, and the height is 300 cm.

[0061] One traction member 100 is respectively connected corresponding to the two ends of the first I-beam crossbeam 401 and the two ends of the third I-beam crossbeam 403; similarly, one traction member 100 is respectively connected corresponding to the two ends of the second I-beam crossbeam 402 and the two ends of the fourth I-beam crossbeam 404. In the tensioned state, all four traction members 100 should be parallel to the central axis of the pipe-withdrawal pipeline, and the vertical heights of the two traction members 100 connected between the first I-beam crossbeam 401 and the third I-beam crossbeam 403 are equal, and the vertical heights of the two traction members 100 connected between the second I-beam crossbeam 402 and the fourth I-beam crossbeam 404 are equal.

[0062] In an embodiment of the present invention, the traction member 100 includes a steel wire rope. The steel wire rope includes multiple rope bodies. The two ends of each rope body are respectively bent and fixed by a buckle to form a connection ring.

[0063] Wherein, the rope bodies of adjacent sections are connected by U-shaped locks. The U-shaped locks include U-shaped hooks and locking bolts. The adjacent connecting rings of the adjacent rope bodies are respectively sleeved on the U-shaped hooks. The locking bolts are passed through and connected between the two ends of the U-shaped hooks so that the adjacent connecting rings of the adjacent rope bodies are locked on the U-shaped hooks.

[0064] The rope bodies at the head end and the tail end are respectively connected with the machine head connecting part and the power pressing part through corresponding connecting rings.

[0065] The connecting positions of the head connecting part and the power pressing part and the connecting ring are all provided with arc-shaped transition pieces 407. A transverse limit groove is provided on the arc-shaped transition piece 407. A limit clamp ring is provided on the inner ring of the connecting ring. One side of the limit clamp ring is fitted and covered on the connecting ring. The other side of the limit clamp ring is fitted and clamped in the transverse limit groove to limit the transverse movement of the traction member 100.

[0066] Specifically, the traction member 100 can be composed of multiple rope sections of the same size or different sizes that are spliced ​​together. For example, a rope section of corresponding length is respectively provided inside each pipe withdrawal section 601 and inside the pipe jacking machine head 602. For example, the length of the pipe withdrawal section 601 is 2.5m, and the length of the rope provided inside it is correspondingly 2.5m. The length of the pipe withdrawal section 601 is 3m, and the length of the rope provided inside it is correspondingly 3m. The two ends of each rope section are bent and fixed by buckles to form a connecting ring at each end of the rope. The two adjacent rope sections are detachably connected by a connecting ring and a U-shaped lock. Specifically, the two adjacent connecting rings are respectively mounted on the U-shaped hook, and the two adjacent connecting rings are locked on the U-shaped hook by a locking bolt. During the pipe withdrawal operation, when a certain pipe withdrawal section 601 is completely moved into the working shaft 200, the corresponding section of the rope is disassembled to facilitate the lifting device to lift the pipe withdrawal section 601 outside the vertical working shaft. At the same time, the length of the traction member 100 can be readjusted to make the traction member 100 suitable for dragging the remaining pipe withdrawal sections 601.

[0067] For example, Figure 1As shown, the first I-beam crossbeam 401, the second I-beam crossbeam 402, the third I-beam crossbeam 403, and the fourth I-beam crossbeam 404 are all arranged along the tension direction of the traction member 100 perpendicular to the parallel end plates of each I-beam crossbeam. Arc-shaped transition members 407 are respectively welded to the front and back sides of the parallel end plates of each I-beam crossbeam. An arc-shaped lateral limiting groove is provided on the arc-shaped transition member 407. A limiting ring is provided on the inner ring of the connection ring. One side of the limiting ring can fit and cover the inner ring of the connection ring. The shape and size of the other side of the limiting ring are adapted to the arc-shaped lateral limiting groove, so that the limiting ring can fit into the arc-shaped lateral limiting groove and reduce the stress concentration between the traction member 100 and the tip positions of the parallel end plates of each I-beam crossbeam, thereby protecting the traction member 100 and each I-beam crossbeam.

[0068] In an embodiment of the present invention, the large-diameter pipe withdrawing device further includes a drainage device, a grouting device, and a monitoring device.

[0069] Among them, the drainage device includes a drainage pump and a drainage pipeline. The drainage pipeline extends into the inner part of the pipe jacking machine head 602 and communicates with the pipe withdrawing space at the front end of the pipe jacking machine head 602. The drainage pump is connected to the drainage pipeline. While the pipe withdrawing pipe section 601 moves outwards, the groundwater in the pipe withdrawing space can be discharged to the outside of the working shaft 200 through the drainage pipeline and the drainage pump.

[0070] The grouting device includes a grouting pump 800 and a grouting pipe. The grouting pipeline extends into the inner part of the pipe jacking machine head 602 and communicates with the pipe withdrawing space at the front end of the pipe jacking machine head 602. The grouting pump 800 is connected to the grouting pipe.

[0071] Among them, the grouting pipeline may include a soil grouting pipe, a cement slurry grouting pipe, and a lubricating slurry grouting pipe.

[0072] Before the pipe withdrawing operation, it is first necessary to debug the large-diameter pipe withdrawing device, that is, to determine whether the states of all components are intact. After successful debugging, lubricating slurry can be respectively injected between the side wall of the pipe jacking machine head 602 and the side wall of the pipe withdrawing pipeline, and between the side wall of each pipe withdrawing pipe section 601 and the side wall of the pipe withdrawing pipeline through the lubricating slurry injection ports and the lubricating slurry grouting pipes provided on the side wall of the pipe jacking machine head 602 and the side walls of each pipe withdrawing pipe section 601 to reduce the outward movement friction of the pipe jacking machine head 602 and each pipe withdrawing pipe section 601. For example, the lubricating slurry includes bentonite slurry.

[0073] During the pipe withdrawal operation, while each pipe withdrawal section 601 moves outward, bentonite slurry is backfilled into the pipe withdrawal space at the front end of the pipe jacking machine head 602 through the bentonite slurry injection holes and bentonite slurry injection pipes provided on the pipe jacking machine head 602 to prevent the collapse of the pipe withdrawal space at the front end of the pipe jacking machine head 602. When configuring the bentonite slurry, clay is used as the main material, and a soil conditioner and water are added to the clay. At the same time, a flocculant is added to enable the bentonite slurry backfilled into the pipe withdrawal space to undergo flocculation dehydration to achieve a consolidation effect. In addition, an exhaust hole and an overflow slurry hole are provided on the pipe jacking machine head 602. Through the exhaust hole, the gas in the pipe withdrawal space at the front end of the pipe jacking machine head 602 can be discharged to improve the bentonite slurry backfilling effect in the pipe withdrawal space. At the same time, by observing the state of the overflow slurry hole and the bentonite slurry injection pressure, the bentonite slurry injection state in the pipe withdrawal space can be judged. For example, when slurry overflows from the overflow slurry hole, it indicates that the current pipe withdrawal space is already filled with bentonite slurry, and the staff can control the working state of the slurry injection pump 800 in real time based on this state.

[0074] During the pipe withdrawal stage of the pipe jacking machine head 602, while the pipe jacking machine head 602 moves outward, cement slurry is injected into the remaining pipe withdrawal space through the cement slurry injection holes and cement slurry injection pipes provided on the pipe jacking machine head 602 to reinforce the section close to the pipe opening of the withdrawn pipe. For example, the mixing ratio of the cement slurry is cement: fly ash: fine sand = 5:2:3.

[0075] The monitoring device includes a pressure detection device and multiple cameras. The pressure detection device is installed on the outer side of the pipe jacking machine head 602. The pressure detection device is used to monitor the collapse state of the pipe withdrawal space. The monitoring range of the camera covers at least the head connection part, the power jacking part, the traction member 100, the power device, and the working shaft 200.

[0076] For example, a pressure detection device is installed at the front end of the pipe jacking machine head 602. When the detection result of this pressure detection device suddenly increases, it indicates that soil collapse has occurred in the pipe withdrawal space at the front end of the current pipe jacking machine head 602. In addition, cameras can be installed on each I-beam crossbeam, the connection rings of each rope body, the jack 500, the injection holes, and the working shaft 200 to monitor whether the states of each component in the pipe withdrawal operation process and the large-diameter pipe withdrawal device are normal and safe outside the working shaft 200.

[0077] According to the second aspect of the present invention, as Figure 3 shown, a pipe withdrawal method for performing a pipe withdrawal operation using the above-mentioned large-diameter pipe withdrawal device is provided, including:

[0078] S1: Layout and install the head connection part, the power jacking part, and the power device;

[0079] S2: Connect the traction member 100 between the head connection part and the power jacking part;

[0080] S3: Start the power device. The power device drives the power pressing part to drive the traction member 100 to drag the head 602 of the pipe jacking machine away from the pipe withdrawing pipeline, so as to extrude each pipe withdrawing pipe section 601 of the head 602 of the pipe jacking machine to the outside of the pipe withdrawing pipeline until the pipe withdrawing pipe section 601 at the tail end completely moves into the working shaft 200, and then turn off the power device;

[0081] S4: Use the hoisting device to hoist the pipe withdrawing pipe section 601 that has completely moved into the working shaft 200 to the outside of the working shaft 200;

[0082] S5: Adjust the length of the traction member 100 and connect it between the head connection part and the power pressing part;

[0083] Repeat the steps of S3 - S5 to withdraw each pipe withdrawing pipe section 601 from the pipe withdrawing pipeline one by one along the direction from the tail end to the head end of the pipe jacking pipeline and hoist it to the outside of the working shaft 200.

[0084] Further, in an embodiment of the present invention, in the step of S1, it further includes arranging a pressure detection device outside the head 602 of the pipe jacking machine, and arranging cameras in the large - diameter pipe withdrawing device and the working shaft 200;

[0085] In the step of S2, it further includes injecting lubricating slurry between the side wall of the head 602 of the pipe jacking machine and the side wall of the pipe withdrawing pipeline, and between the side wall of each pipe withdrawing pipe section 601 and the side wall of the pipe withdrawing pipeline through the grouting holes on the side wall of the head 602 of the pipe jacking machine and the grouting holes on the side wall of each pipe withdrawing pipe section 601 respectively.

[0086] Further, in an embodiment of the present invention, in the step of S3, when the head 602 of the pipe jacking machine and each pipe withdrawing pipe section 601 move outwards, turn on the drainage pump and the grouting pump 800 to drain the water in the pipe withdrawing space to the outside of the working shaft 200 and backfill the pipe withdrawing space with soil slurry;

[0087] During the process of the head 602 of the pipe jacking machine and each pipe withdrawing pipe section 601 moving outwards, the power device needs to start and stop intermittently, so that the single - continuous moving distance of the head 602 of the pipe jacking machine and each pipe withdrawing pipe section 601 does not exceed 40 cm.

[0088] Furthermore, in an embodiment of the present invention, the pipe withdrawing method further includes:

[0089] S6: After the pipe withdrawing pipe section 601 at the head end is hoisted to the outside of the working shaft 200, adjust the length of the traction member 100 and connect it between the head connection part and the power pressing part, start the power device, the power device drives the power pressing part to drive the traction member 100 to drag the head 602 of the pipe jacking machine to the outside of the pipe withdrawing pipeline. At the same time, turn on the grouting pump 800 to backfill the remaining pipe withdrawing space in front of the head 602 of the pipe jacking machine with cement slurry;

[0090] S7: After the head 602 of the pipe jacking machine has completely moved to the working shaft 200, use a hoisting device to hoist the head 602 of the pipe jacking machine to the outside of the working shaft 200;

[0091] S8: Drill a reinforcement grouting hole at the position of the pipe withdrawal opening, and grout and reinforce the position of the pipe withdrawal opening through this reinforcement grouting hole;

[0092] S9: Drill a reinforcement grouting hole from the ground to the backfill slurry section of the pipe withdrawal pipeline, and reinforce the backfill slurry section of the pipe withdrawal pipeline through this reinforcement grouting hole.

[0093] For example, before the pipe withdrawal operation, it is first necessary to remove the relevant mechanical equipment in the pipe withdrawal pipeline to prevent damage to the pipe jacking equipment. Then, install a head connection part, a power jacking part, a power device, a pressure detection device and a camera in the head 602 of the pipe jacking machine and each pipe withdrawal pipe section 601. Specifically, weld the first I-beam crossbeam 401 and the second I-beam crossbeam 402 horizontally to the internal reinforcement of the head 602 of the pipe jacking machine respectively. Connect the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 correspondingly, and make the third I-beam crossbeam 403 slidably connected to the base guide rail 300. Connect two trapezoidal reinforcement steel plates 501 to both sides of the outer wall 700 of the pipe withdrawal pipeline opening respectively. Connect four jacks 500 to the trapezoidal reinforcement steel plates 501 correspondingly. In addition, install a pressure detection device on the outside of the head 602 of the pipe jacking machine, and this pressure detection device is used to detect the soil pressure in the pipe withdrawal space at the front end of the head 602 of the pipe jacking machine. Install cameras in the pipeline. For example, cameras can be installed at each I-beam crossbeam, at the connection rings of each rope body, at the jacks 500, at each grouting hole and in the working shaft 200 respectively, so as to monitor the pipe withdrawal operation process and the states of each component in the large-diameter pipe withdrawal device and whether the operation process is normal and safe outside the working shaft 200.

[0094] Splice multiple rope bodies together to form four traction members 100 with appropriate lengths. Connect each traction member 100 to both ends of the first I-beam crossbeam 401 and the third I-beam crossbeam 403, and both ends of the second I-beam crossbeam 402 and the fourth I-beam crossbeam 404 correspondingly. It should be noted here that adjacent rope bodies are detachably connected using U-shaped snap fasteners. The limiting rings at the ends of the rope bodies connected to each I-beam crossbeam should be fitted and clamped in the horizontal limiting grooves of the arc transition member 407.

[0095] Subsequently, commissioning of the large-diameter pipe withdrawal device is required. Or rather, check the working status of each component in the large-diameter pipe withdrawal device. For example, the strength of the traction member 100, the power output of the jack 500, whether there are any abnormalities in the grouting pump 800, the drainage pump, and the camera, etc. After the commissioning is completed and it is confirmed that there is no abnormality in the large-diameter pipe withdrawal device, lubricating slurry is respectively injected between the side wall of the pipe jacking machine head 602 and the side wall of the withdrawal pipe through the lubricating slurry injection ports and lubricating slurry injection pipes provided on the side walls of the pipe jacking machine head 602 and the side walls of each withdrawal pipe section 601, as well as between the side wall of each withdrawal pipe section 601 and the side wall of the withdrawal pipe, so as to reduce the outward movement friction of the pipe jacking machine head 602 and each withdrawal pipe section 601. For example, the lubricating slurry includes bentonite slurry.

[0096] During the pipe withdrawal operation, first start the hydraulic pump arranged outside the working shaft 200, so that each jack 500 drives the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 to move synchronously to the side away from the withdrawal pipe. The third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 drive the traction member 100 to drag the first I-beam crossbeam 401 and the second I-beam crossbeam 402 to the side away from the withdrawal pipe, and then drive the pipe jacking machine head 602 to extrude each withdrawal pipe section 601 outward. When the outermost withdrawal pipe section 601 completely moves into the working shaft 200, turn off the pump to make the jack 500 stop the jacking action. At this time, disassemble the rope body corresponding to this withdrawal pipe section 601, and hoist this withdrawal pipe section 601 to the outside of the working shaft 200 through the hoisting device.

[0097] Subsequently, retract the jacking rod of the jack 500, and use the hoisting device to slide the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 back to the position close to the jacking rod of the jack 500. At the same time, connect the outer end connection ring of the rope body corresponding to the outermost withdrawal pipe section 601 at this time to the end of the rope body connected to the power jacking part through a U-shaped buckle, so that the length of the traction member 100 is suitable for the current pipe withdrawal state, and make preparations for the subsequent cyclic pipe withdrawal operation. In this way, it is continuously repeated until the innermost withdrawal pipe section 601 and the pipe jacking machine head 602 are withdrawn from the working shaft 200 and hoisted to the outside of the working shaft 200.

[0098] While the jack 500 drives the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 to move away from the withdrawal pipe, it is necessary to start the drainage pump and the grouting pump 800, so that the groundwater in the pipe withdrawal space at the front end of the pipe jacking machine head 602 is discharged to the outside of the working shaft 200 in time, and at the same time backfill the slurry into the pipe withdrawal space at the front end of the pipe jacking machine head. The water level in the working shaft 200 and the slurry overflow state of the slurry overflow hole in the pipe jacking machine head 602 can be observed by a camera outside the working shaft 200.

[0099] During the pipe withdrawal stage of each pipe withdrawal pipe section 601, the slurry backfilled in the pipe withdrawal space at the front end of the pipe jacking machine head 602 is soil slurry. During the pipe withdrawal stage of the pipe jacking machine head 602, the slurry backfilled in the pipe withdrawal space at the front end of the pipe jacking machine head 602 is cement slurry.

[0100] After hoisting the pipe jacking machine head 602 outside the working shaft 200, reinforcement grouting holes can be drilled at the opening position of the pipe withdrawal pipeline, and further grouting reinforcement can be carried out at the opening position of the pipe withdrawal pipeline through these reinforcement grouting holes. Along the direction from top to bottom, reinforcement grouting holes are drilled from the ground into the backfilled soil slurry section of the pipe withdrawal pipeline, and the backfilled soil slurry section of the pipe withdrawal pipeline is reinforced through these reinforcement grouting holes. For example, the slurry used for further reinforcement includes but is not limited to cement slurry.

[0101] It should be emphasized that during the process of the jack 500 driving the third I-beam crossbeam 403 and the fourth I-beam crossbeam 404 to move outwards, intermittent jacking pressure is required. The single movement distance of the pipe jacking machine head 602 and each pipe withdrawal pipe section 601 does not exceed 40 cm. After each movement cycle is completed, a period of pause is required to provide sufficient solidification time for the backfilled slurry in the current pipe withdrawal space.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-caliber pipe withdrawing device, characterized in that, It includes the head connection part, the power pressing part, the power device and the traction part. The head connection part is connected to the inside of the head of the pipe jacking machine, the power pressing part is slidably connected to the base rail of the working shaft, one end of the traction member is connected to the head connection part, and the other end of the traction member is extended from the head of the pipe jacking machine through each pipe withdrawal section to the working shaft and connected to the power pressing part, and the power device is used to drive the power pressing part to slide along the base rail to drive the traction member to drag the head of the pipe jacking machine to squeeze each pipe withdrawal section to withdraw the pipe into the working shaft; The head connection part includes a first I-beam cross beam and a second I-beam cross beam, the first I-beam cross beam and the second I-beam cross beam are arranged at intervals up and down, and both are transversely connected to the interior of the head of the pipe jacking machine. The power pressing part includes a third I-beam cross beam and a fourth I-beam cross beam, the third I-beam cross beam is arranged corresponding to the first I-beam cross beam, the fourth I-beam cross beam is arranged corresponding to the second I-beam cross beam, the third I-beam cross beam is slidably connected to the base guide rail, and the fourth I-beam cross beam is connected to the third I-beam cross beam. One traction member is connected between the two ends of the first I-beam cross beam and the two ends of the third I-beam cross beam, and one traction member is connected between the two ends of the second I-beam cross beam and the two ends of the fourth I-beam cross beam, respectively. Each traction member is parallel to the central axis of the withdrawn pipe; Wherein, the power device includes a jack, and one jack is arranged at each end of the third I-beam cross beam and each end of the fourth I-beam cross beam, one end of each jack is connected to the outer wall of the opening of the withdrawn pipe through a reinforcing steel plate and a fastener, and the other end of each jack is arranged at the end of the third I-beam cross beam or the end of the fourth I-beam cross beam, and each jack can press and drive the third I-beam cross beam and the fourth I-beam cross beam to move synchronously on the base guide rail in a direction parallel to the central axis of the withdrawn pipe; During the pipe withdrawal operation, the power device is installed on the outer wall of the hole of the pipe withdrawal to output the top pressure along the side away from the pipe withdrawal.

2. The large-caliber pipe withdrawing device according to claim 1, wherein The traction member comprises a steel wire rope, and the steel wire rope comprises a plurality of rope sections, and the two ends of each rope section are bent and fixed by buckles to form a connecting ring. Wherein, the rope bodies of adjacent sections are connected by a U-shaped lock, and the U-shaped lock includes a U-shaped hook and a locking bolt. The adjacent connecting rings of the rope bodies of adjacent sections are respectively sleeved on the U-shaped hook, and the locking bolt is penetrated and connected between the two ends of the U-shaped hook so that the adjacent connecting rings of the rope bodies of adjacent sections are locked on the U-shaped hook. The rope bodies at the head end and the tail end are respectively connected with the machine head connecting part and the power pressing part through the corresponding connecting rings. Arc transition pieces are provided at the sleeved connection positions of the machine head connecting part and the power pressing part with the connecting ring. Transverse limiting grooves are provided on the arc transition pieces. A limiting snap ring is provided on the inner ring of the connecting ring. One side of the limiting snap ring fits and wraps around the connecting ring, and the other side of the limiting snap ring fits and is placed in the transverse limiting groove to limit the transverse movement of the steel wire rope.

3. The large-diameter pipe withdrawal device according to claim 2, characterized in that, The power pressing part further includes a vertical connecting rod and an anti-overturning inclined rod. The vertical connecting rod is supported and connected between the third I-beam cross beam and the fourth I-beam cross beam. One end of the anti-overturning inclined rod is connected to the fourth I-beam cross beam, and the other end of the anti-overturning inclined rod extends to the side away from the jack and is slidably connected to the base guide rail.

4. The large-diameter pipe withdrawing device according to claim 3, wherein The large-diameter pipe withdrawal device further includes a drainage device, a grouting device, and a monitoring device. Among them, the drainage device includes a drainage pump and a drainage pipeline. The drainage pipeline extends into the machine head of the pipe jacking machine and communicates with the pipe withdrawal space at the front end of the machine head of the pipe jacking machine. The drainage pump is connected to the drainage pipeline. The grouting device includes a grouting pump and a grouting pipe. The grouting pipe extends into the machine head of the pipe jacking machine and communicates with the pipe withdrawal space at the front end of the machine head of the pipe jacking machine. The grouting pump is connected to the grouting pipe. The monitoring device includes a pressure detection device and multiple cameras. The pressure detection device is installed on the outer side of the machine head of the pipe jacking machine. The pressure detection device is used to monitor the collapse state of the pipe withdrawal space. The monitoring range of the camera covers at least the machine head connecting part, the power pressing part, the traction part, the power device, and the working shaft.

5. A tube withdrawal method for performing tube withdrawal operations using the large-caliber tube withdrawal device according to any one of claims 1 to 4, characterized in that, Including: S1: Layout and install the machine head connecting part, the power pressing part, and the power device. S2: Connect the traction part between the machine head connecting part and the power pressing part. S3: Start the power device. The power device drives the power pressing part to drive the traction part to drag the machine head of the pipe jacking machine to the side away from the pipe withdrawal pipeline, so that the machine head of the pipe jacking machine extrudes each pipe withdrawal pipe joint towards the outside of the pipe withdrawal pipeline until the pipe withdrawal pipe joint at the tail end completely moves into the working shaft, and then turn off the power device. S4: Use the hoisting device to hoist the pipe withdrawal pipe joint that has completely moved into the working shaft to the outside of the working shaft. S5: Adjust the length of the traction part and connect it between the machine head connecting part and the power pressing part. Loop through the steps of S3 - S5 to withdraw each pipe withdrawal pipe joint from the pipe withdrawal pipeline one by one along the direction from the tail end to the head end of the pipe jacking pipeline and hoist it to the outside of the working shaft.

6. The tube withdrawal method according to claim 5, characterized in that, In the step of S1, it further includes arranging a pressure detection device on the outer side of the machine head of the pipe jacking machine and arranging cameras in the large-diameter pipe withdrawal device and the working shaft. In the step of S2, it further includes injecting lubricating slurry between the side wall of the machine head of the pipe jacking machine and the side wall of the pipe withdrawal pipeline and between the side wall of each pipe withdrawal pipe joint and the side wall of the pipe withdrawal pipeline through the grouting holes on the side wall of the machine head of the pipe jacking machine and the grouting holes on the side wall of each pipe withdrawal pipe joint respectively.

7. The tube withdrawal method according to claim 5 or 6, characterized in that In the step of S3, when the machine head of the pipe jacking machine and each pipe withdrawal pipe joint move outwards, turn on the drainage pump and the grouting pump to drain the water in the pipe withdrawal space to the outside of the working shaft and backfill the pipe withdrawal space with soil slurry. During the outward movement of the jacking machine head and each pipe section to be withdrawn, the power device needs to be intermittently started and stopped, so that the single continuous movement distance of the jacking machine head and each pipe section to be withdrawn does not exceed 40 cm.

8. The tube withdrawal method according to claim 7, characterized in that, The pipe withdrawal method further includes: S6: After the pipe section to be withdrawn at the head end is hoisted outside the working shaft, adjust the length of the traction member and connect it between the head connection part and the power jacking part. Start the power device, and the power device drives the power jacking part to drive the traction member to drag the jacking machine head outside the pipe withdrawal pipeline. At the same time, turn on the grouting pump to backfill cement slurry in the remaining pipe withdrawal space at the front end of the jacking machine head; S7: After the jacking machine head is completely moved to the working shaft, use the hoisting device to hoist the jacking machine head outside the working shaft; S8: Drill a reinforcement grouting hole at the position of the pipe withdrawal pipeline opening, and grout and reinforce the position of the pipe withdrawal pipeline opening through this reinforcement grouting hole; S9: Drill a reinforcement grouting hole from the ground to the backfill slurry section of the pipe withdrawal pipeline, and reinforce the backfill slurry section of the pipe withdrawal pipeline through this reinforcement grouting hole.

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