Synchronous pushing device and method for pipe jacking construction

Abstract

The pipe-jacking construction synchronous pushing device comprises a working well formed in the upper end of the ground and a pipe-jacking working face arranged on one side of the working well and used for containing a pipe-jacking pipeline, and further comprises a synchronous pushing tunneling unit which comprises a pipe jacking machine arranged at one end of the pipe-jacking working face and used for tunneling the pipe-jacking working face, the synchronous pushing assembly is arranged at one end of the pipe jacking machine and used for pushing the pipe jacking machine; and the main pushing unit is arranged in the working well and used for pushing the synchronous pushing tunneling unit and the pipe jacking pipeline along with the pipe jacking working face. Through synchronous coordination of jacking iron connection, pipeline butt joint and pipe jacking machine propelling, the construction process is optimized, the overall construction efficiency is improved, it is guaranteed that the pipe jacking machine can be stably propelled in the propelling process, the progress of jacking iron connection and pipeline butt joint is conducted synchronously, and it is guaranteed that pipe jacking construction is conducted smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking construction, and in particular to a synchronous jacking device and method for pipe jacking construction. Background Art

[0002] In the field of trenchless construction technology of urban pipeline networks, pipe jacking operations are often involved. Pipe jacking operations mainly rely on the thrust of the main jacking cylinder on the pipe segment to overcome the friction between the pipe segment and the surrounding soil, push the pipe segment from the tunnel portal into the preset position in the tunnel, and finally retract the main jacking cylinder.

[0003] In the traditional steel pipe jacking construction process, the steel pipe jacking and pipeline connection processes are carried out alternately. During the pipeline connection process, the time required for pipeline hoisting and docking, welding, and disassembly and assembly of auxiliary cables and jacking mud injection pipelines accounts for about 50% of the single jacking time. However, the existing technology uses the main jacking cylinder as the sole power to push the pipe section, resulting in the inability to carry out jacking work at the same time during the jacking iron connection and pipeline docking, resulting in the construction process cannot be carried out synchronously, low construction efficiency and high construction cost.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a synchronous jacking device and method for pipe jacking construction, so as to solve the problem that the prior art proposed in the above background technology adopts the main jacking cylinder as the sole power to push the pipe section, resulting in the inability to simultaneously carry out the jacking work during the process of jacking iron connection and pipeline docking, resulting in the construction process cannot be carried out synchronously, the construction efficiency is low, and the construction cost is high.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A synchronous jacking device for pipe jacking construction, comprising a working well opened on the upper end of the ground, a pipe jacking working surface arranged on one side of the working well for accommodating a pipe jacking pipeline, and further comprising:

[0008] A synchronous jacking excavation unit includes a pipe jacking machine provided at one end of the pipe jacking working surface for excavating soil, and a synchronous jacking assembly provided at one end of the pipe jacking machine for jacking the pipe jacking machine;

[0009] The main pushing unit is arranged inside the working shaft and is used for pushing the synchronous pushing tunneling unit and the jacking pipe following the jacking working face.

[0010] Furthermore, the main push unit includes:

[0011] A main jacking oil cylinder is installed at the end of the working well opposite to the jacking direction of the jacking pipe;

[0012] A jacking iron, connected to the driving end of the main jacking cylinder, is used to jack the jacking pipe;

[0013] A bottom plate, installed at the bottom of the working well;

[0014] A guide rail is fixedly connected to the upper end of the bottom plate and is used to guide the jacking pipe into the interior of the jacking working surface.

[0015] Furthermore, the pipe jacking machine comprises:

[0016] case;

[0017] A cutterhead, disposed at the front section of the housing, excavates the ground;

[0018] A mud discharge pipe is arranged inside the shell and located at one end of the cutter disc, and is used for discharging the soil excavated by the cutter disc.

[0019] Furthermore, the synchronous pushing assembly includes:

[0020] An outer slide cylinder is fixedly connected to one end of the housing and is used to push the housing to move forward along the jacking direction of the pipe jacking machine;

[0021] An inner slide cylinder, inserted into the outer slide cylinder;

[0022] A plurality of synchronous push cylinders are installed inside the inner slide, and a driving end of the synchronous push cylinder is fixedly connected to one end of the outer slide to drive the outer slide to move forward;

[0023] The hydraulic oil tank is installed inside the inner slide cylinder and is used to supply oil to the synchronous push cylinder.

[0024] Furthermore, one end of the outer slide cylinder located inside the inner slide cylinder is fixedly connected to an anti-twist telescopic rod;

[0025] A guide block is fixedly connected inside the inner slide cylinder at a position corresponding to the anti-twist telescopic rod, and a guide groove for guiding the movement of the anti-twist telescopic rod is provided inside the guide block and outside the anti-twist telescopic rod.

[0026] Furthermore, a machine head control box for controlling the rotation of the cutter disc is provided in the housing;

[0027] A synchronous pushing control box for controlling the synchronous pushing oil cylinder to perform pushing work is provided inside the inner slide;

[0028] The machine head control box is connected with the synchronous push control box through a wire.

[0029] The present invention also provides a method for constructing a jacking pipe using a synchronous jacking device for jacking pipe construction, comprising the following steps:

[0030] Step 1: Remove the mud and water pipelines and cables of the jacking pipe to free up the guide rails;

[0031] Step 2: The new pipe section is hoisted and placed into the working pit, so that the new jacking pipe can be placed on the guide rail stably and accurately, and the jacking mud and water pipeline and cable are connected, and measures are taken to avoid the pipe section connection area;

[0032] Step 3: Start the synchronous jacking assembly, so that under the action of the jacking force of the synchronous jacking assembly, the machine head pushes forward 1.5m, and at the same time, the jacking pipe placed on the guide rail and the jacking pipe in the jacking working surface are connected to each other, welded, inspected and anti-corroded;

[0033] Step 4: Start the main jacking cylinder. The main jacking cylinder pushes the jacking pipe from the upper end of the guide rail into the inside of the jacking working surface through the jacking iron. During this process, the synchronous jacking device retracts proportionally. When the synchronous jacking cylinder retracts, the proportional valve controls the retraction speed and retraction pressure to reset, and the pipe section is pushed forward by 0.5m, and the cumulative completion is 2m;

[0034] Step 5: The main jacking cylinder stops working and retracts to reset. The first section of jacking iron is hoisted and the jacking begins. If the synchronous jacking cylinder has not been reset at this time, it will be reset first and then conventional jacking is carried out. The pipe section is pushed forward by 2m, and a total of 4m is completed. In this process, the synchronous jacking assembly uses the friction between the jacking pipe and the jacking working surface to push the jacking machine to follow the jacking working surface and continue to advance forward;

[0035] Step six: The main jacking cylinder stops working and shrinks to reset. The second section of jacking iron is hoisted and added. Re-jacking begins. Conventional jacking is carried out. The pipe section is jacked another 2m, so that the pipe section is jacked 6m cumulatively in one round of jacking, completing the jacking work of a 6m round of jacking pipe.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The present invention provides a synchronous jacking assembly between the pipe jacking machine and the pipe jacking pipeline. In a specific implementation process, when the main jacking oil cylinder pushes the pipe jacking pipeline to move forward following the pipe jacking working surface through the jacking iron, the pipe jacking pipeline drives the pipe jacking machine to move forward following the pipe jacking working surface through the synchronous jacking assembly, and the pipe jacking machine continues to dig soil through the cutter head and brings the excavated soil out of the shell body through the mud discharge pipe. When the main jacking oil cylinder drives the jacking iron to retract and reset and place the next group of pipe jacking pipelines on the guide rail, at this time, the synchronous jacking oil cylinder is started, and the synchronous jacking oil cylinder drives the outer slide cylinder to move along the inner slide cylinder and push the shell body, and the shell body drives the cutter head to move forward to dig soil. In this process, the friction force between the pipe jacking pipeline and the pipe jacking working surface provides support force for the synchronous jacking assembly. When the main jacking oil cylinder pushes the pipe jacking pipeline newly placed on the guide rail, the pipe jacking pipeline drives the pipe jacking machine to continue digging through the synchronous jacking assembly, and the synchronous jacking oil cylinder is reset synchronously, thereby realizing the synchronization of pipe jacking pipeline connection and pipe jacking machine advancement, saving construction time and improving construction efficiency.

[0038] 2. In the present invention, when the synchronous pushing cylinder drives the outer slide to move along the inner slide, the outer slide drives the anti-torsion telescopic rod to move along the guide groove, and the anti-torsion telescopic rod is limited by the guide block to avoid relative rotation between the inner slide and the outer slide, thereby improving the stability of the synchronous pushing assembly in pushing the pipe jacking machine.

[0039] 3. The present invention optimizes the construction process and improves the overall construction efficiency through the synchronous coordination of top iron connection, pipeline docking and pipe jacking machine advancement, ensuring that the pipe jacking machine can be advanced stably during the advancement process and proceed synchronously with the progress of top iron connection and pipeline docking, thereby ensuring the smooth progress of pipe jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 This is a diagram showing the coordination relationship between the synchronous top-pushing tunneling unit and the main pushing unit of the present invention;

[0042] Figure 3 It is a diagram showing the matching relationship between the pipe jacking machine and the synchronous jacking assembly of the present invention;

[0043] Figure 4 It is a structural schematic diagram of the pipe jacking machine of the present invention;

[0044] Figure 5 It is a structural schematic diagram of the synchronous pushing assembly of the present invention;

[0045] Figure 6 Flow chart of the present invention.

[0046] Figure numerals: 100, ground; 101, jacking working surface; 102, jacking pipeline; 103, working well; 1, synchronous jacking excavation unit; 11, jacking machine; 111, shell; 112, cutter head; 113, machine head control box; 114, mud discharge pipe; 12, synchronous jacking assembly; 121, outer slide; 122, inner slide; 123, hydraulic oil tank; 124, synchronous jacking cylinder; 125, synchronous jacking control box; 126, anti-twist telescopic rod; 127, guide block; 1271, guide groove; 2, main pushing unit; 21, main jacking cylinder; 22, jacking iron; 23, bottom plate; 24, guide rail. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1

[0049] See also Figure 1-5 , the present invention provides a technical solution:

[0050] A synchronous jacking device for pipe jacking construction, comprising a working well 103 opened at the upper end of the ground 100, a pipe jacking working surface 101 arranged at one side of the working well 103 for accommodating a pipe jacking pipeline 102, and further comprising:

[0051] The synchronous jacking excavation unit 1 comprises a pipe jacking machine 11 disposed at one end of the pipe jacking working surface 101 for excavating soil, and a synchronous jacking assembly 12 disposed at one end of the pipe jacking machine 11 for jacking the pipe jacking machine 11;

[0052] The main pushing unit 2 is arranged inside the working shaft 103 and is used for pushing the synchronous pushing tunneling unit 1 and the jacking pipe 102 following the jacking working face 101 .

[0053] As an improvement,

[0054] The main push unit 2 comprises:

[0055] A main jacking cylinder 21 is installed in the working well 103 at an end opposite to the jacking direction of the jacking pipe 102;

[0056] A jacking iron 22, connected to the driving end of the main jacking cylinder 21, is used to jack the jacking pipe 102;

[0057] A bottom plate 23 is installed at the bottom of the working well 103;

[0058] The guide rail 24 is fixedly connected to the upper end of the bottom plate 23 and is used to guide the jacking pipe 102 into the interior of the jacking working surface 101 .

[0059] Furthermore, the pipe jacking machine 11 comprises:

[0060] A housing 111, wherein the housing 111 is fixedly connected to an outer slide cylinder 121;

[0061] The cutter head 112 is disposed at the front section of the housing 111 and excavates the ground;

[0062] The mud discharge pipe 114 is disposed inside the housing 111 and at one end of the cutter disc 112 , and is used to discharge the soil excavated by the cutter disc 112 .

[0063] Furthermore, the synchronous pushing assembly 12 includes:

[0064] The outer slide cylinder 121 is fixedly connected to one end of the housing 111 and is used to push the housing 111 to move forward along the jacking direction of the pipe jacking machine 11;

[0065] The inner slide cylinder 122 is inserted into the outer slide cylinder 121;

[0066] The synchronous push cylinder 124 is provided with multiple groups and is installed inside the inner slide 122. The driving end of the synchronous push cylinder 124 is fixedly connected to one end of the outer slide 121 to drive the outer slide 121 to move forward.

[0067] The hydraulic oil tank 123 is installed inside the inner slide 122 and is used to supply oil to the synchronous push cylinder 124 .

[0068] One end of the outer slide cylinder 121 located inside the inner slide cylinder 122 is fixedly connected with an anti-twist telescopic rod 126;

[0069] A guide block 127 is fixedly connected inside the inner slide 122 at a position corresponding to the anti-twist telescopic rod 126 , and a guide groove 1271 for guiding the movement of the anti-twist telescopic rod 126 is provided inside the guide block 127 and outside the anti-twist telescopic rod 126 .

[0070] In addition, a head control box 113 for controlling the rotation of the cutter head 112 is provided in the housing 111;

[0071] The inner slide 122 is provided with a synchronous pushing control box 125 for controlling the synchronous pushing oil cylinder 124 to perform pushing work;

[0072] The machine head control box 113 is connected to the synchronous push control box 125 via a wire.

[0073] It should be added that: the jacking working surface 101 in the present invention is the working surface where the soil in the front section of the cutter head 112 of the jacking machine 11 is cut and crushed. After being crushed, the soil flows into the mud discharge pipe 114 through the opening of the cutter head 112 and is pumped away by the mud discharge pump.

[0074] It should be noted that: in the prior art, the main jacking oil cylinder 21 is used as a separate driving force to push the jacking pipe 102 and the jacking machine 11 forward following the jacking working surface 101. When the jacking pipe 102 on the guide rail 24 is pushed into the jacking working surface 101 and the jacking pipe 102 needs to be added again, the main jacking oil cylinder 21 needs to be reset. During the resetting process of the main jacking oil cylinder 21, the jacking machine 11 is forced to stop the excavation work due to the lack of forward pushing force. Only when the next round of main jacking oil cylinder 21 pushes the jacking pipe 102, the jacking pipe 102 drives the jacking machine 11 to excavate forward, resulting in the inability to continue the entire excavation process.

[0075] The present invention sets a synchronous jacking assembly 12 between the pipe jacking machine 11 and the pipe jacking pipeline 102. In the specific implementation process, when the main jacking oil cylinder 21 pushes the pipe jacking pipeline 102 to move forward following the pipe jacking working surface 101 through the jacking iron 22, the pipe jacking pipeline 102 drives the pipe jacking machine 11 to move forward following the pipe jacking working surface 101 through the synchronous jacking assembly 12, and the pipe jacking machine 11 continues to dig soil through the cutter head 112 and brings the excavated soil out of the shell 111 through the mud discharge pipe 114. When the main jacking oil cylinder 21 drives the jacking iron 22 to retract and return to its original position and place the next group of pipe jacking pipelines 102 on the guide rail 24, at this time, the synchronous jacking oil cylinder 124 is started, and the synchronous jacking oil cylinder 124 is pushed forward. The oil cylinder 124 pushes the outer slide 121 to move along the inner slide 122 and push the shell 111. The shell 111 drives the cutter head 112 to move forward to perform excavation. In this process, the friction between the jacking pipe 102 and the jacking working surface 101 provides support for the synchronous jacking assembly 12. When the main jacking oil cylinder 21 pushes the jacking pipe 102 newly placed on the guide rail 24, the jacking pipe 102 drives the jacking machine 11 to continue to advance through the synchronous jacking assembly 12, and the synchronous jacking oil cylinder 124 is reset synchronously, thereby realizing the simultaneous connection of the jacking pipe 102 and the advancement of the jacking machine 11, saving construction time and improving construction efficiency.

[0076] In the process of the synchronous pushing cylinder 124 driving the outer slide 121 to move along the inner slide 122, the outer slide 121 drives the anti-twist telescopic rod 126 to move along the guide groove 1271, and the anti-twist telescopic rod 126 is limited by the guide block 127 to avoid relative rotation between the inner slide 122 and the outer slide 121, thereby improving the stability of the synchronous pushing assembly 12 in pushing the pipe jacking machine 11.

[0077] Embodiment 2

[0078] like Figure 1-6As shown, a method for constructing a pipe jacking using a synchronous jacking device for pipe jacking construction comprises the following steps:

[0079] Step 1: Remove the mud and water pipelines and cables of the jacking pipe 102 to free up the guide rail 24;

[0080] Step 2: The new pipe segment is hoisted and placed into the working well 103, so that the new jacking pipe 102 is stably and accurately placed on the guide rail 24, and the jacking mud and water pipelines and cables are connected, and measures are taken to avoid the pipe segment connection area;

[0081] Step 3: Start the synchronous jacking assembly 12, so that under the action of the jacking force of the synchronous jacking assembly 12, the machine head pushes forward 1.5m, and at the same time, the jacking pipe 102 placed on the guide rail 24 and the jacking pipe 102 in the jacking working surface 101 are connected to each other, welded, inspected and anti-corroded;

[0082] Step 4: Start the main jacking cylinder 21. The main jacking cylinder 21 pushes the jacking pipe 102 from the upper end of the guide rail 24 into the inside of the jacking working surface 101 through the jacking iron 22. In this process, the synchronous jacking device retracts proportionally. When the synchronous jacking cylinder 124 retracts, the retraction speed and retraction pressure are controlled by the proportional valve to reset. The pipe section is pushed forward by 0.5m, and 2m is completed cumulatively.

[0083] Step 5: The main jacking cylinder 21 stops working and retracts to reset, hoisting and adding the first section of jacking iron 22, and starts to jack up again. If the synchronous jacking cylinder 124 has not been reset at this time, it will be reset first, and then conventional jacking is carried out. The pipe section is jacked for 2m, and 4m is completed in total. In this process, the synchronous jacking assembly 12 uses the friction between the jacking pipe 102 and the jacking working surface 101 to push the jacking machine 11 to follow the jacking working surface 101 and continue to dig forward;

[0084] Step 6: The main jacking cylinder 21 stops working and shrinks to reset, the second jacking iron 22 is hoisted and added, and the jacking starts again. Conventional jacking is carried out, and the pipe section is jacked for another 2m, so that the pipe section is jacked for a total of 6m in one round of jacking, completing a round of 6m jacking work of the jacking pipe 102.

[0085] It should be noted that the present invention optimizes the construction process and improves the overall construction efficiency through the synchronous coordination of the connection of the top iron 22, the connection of the pipeline and the advancement of the pipe jacking machine 11, ensures that the pipe jacking machine 11 can be steadily advanced during the advancement process, and is synchronized with the progress of the connection of the top iron 22 and the connection of the pipeline, thereby ensuring the smooth progress of the pipe jacking construction.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0087] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous jacking device for pipe jacking construction, comprising a working well (103) opened at the upper end of the ground (100), a pipe jacking working surface (101) arranged on one side of the working well (103) for accommodating a pipe jacking pipeline (102), characterized in that: Also includes: A synchronous jacking excavation unit (1) comprises a pipe jacking machine (11) arranged at one end of the pipe jacking working surface (101) for excavating soil, and a synchronous jacking assembly (12) arranged at one end of the pipe jacking machine (11) for jacking the pipe jacking machine (11); The main pushing unit (2) is arranged inside the working shaft (103) and is used to push the synchronous pushing tunneling unit (1) and the jacking pipe (102) following the jacking working surface (101).

2. A synchronous jacking device for pipe jacking construction according to claim 1, characterized in that: The main push unit (2) comprises: A main jacking oil cylinder (21) is installed in the working well (103) at an end opposite to the jacking direction of the jacking pipe (102); A jacking iron (22), connected to the driving end of the main jacking cylinder (21), is used to jack the jacking pipe (102); A bottom plate (23) installed at the bottom of the working well (103); A guide rail (24) is fixedly connected to the upper end of the bottom plate (23) and is used to guide the jacking pipe (102) into the interior of the jacking working surface (101).

3. A synchronous jacking device for pipe jacking construction according to claim 1, characterized in that: The pipe jacking machine (11) comprises: Housing (111); A cutter head (112) is arranged at the front section of the housing (111) to excavate the ground; A mud discharge pipe (114) is arranged inside the housing (111) and located at one end of the cutter disc (112), and is used to discharge the soil excavated by the cutter disc (112).

4. A synchronous jacking device for pipe jacking construction according to claim 3, characterized in that: The synchronous pushing assembly (12) comprises: An outer slide cylinder (121) is fixedly connected to one end of the housing (111) and is used to push the housing (111) to move forward along the jacking direction of the pipe jacking machine (11); An inner slide cylinder (122) is inserted into the outer slide cylinder (121); A synchronous push cylinder (124) is provided in multiple groups and is installed inside the inner slide cylinder (122). The driving end of the synchronous push cylinder (124) is fixedly connected to one end of the outer slide cylinder (121) to drive the outer slide cylinder (121) to move forward; The hydraulic oil tank (123) is installed inside the inner slide cylinder (122) and is used to supply oil to the synchronous push cylinder (124).

5. A synchronous jacking device for pipe jacking construction according to claim 4, characterized in that: One end of the outer slide cylinder (121) located inside the inner slide cylinder (122) is fixedly connected to an anti-twist telescopic rod (126); A guide block (127) is fixedly connected inside the inner slide cylinder (122) at a position corresponding to the anti-twist telescopic rod (126), and a guide groove (1271) for guiding the movement of the anti-twist telescopic rod (126) is provided inside the guide block (127) and outside the anti-twist telescopic rod (126).

6. A synchronous jacking device for pipe jacking construction according to claim 5, characterized in that: A machine head control box (113) for controlling the rotation of the cutter disc (112) is provided in the housing (111); A synchronous pushing control box (125) for controlling the synchronous pushing oil cylinder (124) to perform pushing work is provided inside the inner slide cylinder (122); The machine head control box (113) is connected to the synchronous thrust control box (125) via a wire.

7. A method for constructing a pipe jacking using a synchronous jacking device for pipe jacking construction according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Remove the mud and water pipelines and cables of the jacking pipe (102) to free up the guide rail (24); Step 2: The new pipe section is hoisted and placed into the working well (103), so that the new jacking pipe (102) is stably and accurately placed on the guide rail (24), and the jacking mud and water pipeline and cable are connected, and measures are taken to avoid the pipe section connection area; Step 3: Start the synchronous jacking assembly (12), so that under the action of the jacking force of the synchronous jacking assembly (12), the machine head is pushed forward 1.5m, and at the same time, the jacking pipe (102) placed on the guide rail (24) and the jacking pipe (102) in the jacking working surface (101) are connected to each other, welded, inspected and anti-corrosion processes are carried out; Step 4: Start the main jacking oil cylinder (21). The main jacking oil cylinder (21) pushes the jacking pipe (102) from the upper end of the guide rail (24) into the interior of the jacking working surface (101) through the jacking iron (22). During this process, the synchronous jacking device retracts proportionally. When the synchronous jacking oil cylinder (124) retracts, the retraction speed and retraction pressure are controlled by the proportional valve to reset. The jacking of the pipe section is completed by 0.5m, and 2m is completed cumulatively. Step 5: The main jacking cylinder (21) stops working and retracts to reset, the first section of jacking iron (22) is hoisted and added, and the jacking begins again. If the synchronous jacking cylinder (124) has not been reset at this time, it is reset first and then conventional jacking is performed. The pipe section is pushed forward by 2m, and a total of 4m is completed. In this process, the synchronous jacking assembly (12) uses the friction between the jacking pipe (102) and the jacking working surface (101) to push the jacking machine (11) to follow the jacking working surface (101) and continue to advance forward; Step 6: The main jacking cylinder (21) stops working and shrinks to reset, hoisting and adding the second jacking iron (22), starting to jack up again, and performing conventional jacking. The pipe section is jacked up another 2m, so that the pipe section is jacked up 6m cumulatively in one round of jacking process, completing the jacking work of a round of 6m jacking pipe (102).

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