Pipe jacking equipment capable of reducing axial bearing capacity of pipe

Abstract

The invention discloses pipe jacking equipment capable of reducing the axial bearing capacity of a pipe, the pipe jacking equipment is used for pushing the pipe, the pipe jacking equipment comprises a main jacking part, the pipe jacking equipment further comprises a force transmission sleeve and a shell, the force transmission sleeve is sleeved with the pipe, and the shell and the main jacking part are located at the two ends of the force transmission sleeve respectively; and the shell is detachably connected with the force transmission sleeve. By arranging the force transmission sleeve and the shell, the shell is subjected to pressure from a soil body in the process that the main ejector pushes the pipe, and the force transmission sleeve can bear the pressure from the shell through connection of the shell and the force transmission sleeve. The pipe is arranged on the force transmission sleeve in a sleeving mode, and the main ejector exerts ejecting force on the pipe, so that the pipe is pushed by overcoming frictional resistance from a soil body. Through the arrangement, the axial force needing to be borne by the pipe in the pipe jacking construction process is reduced, so that the defect that the low-bearing-capacity pipe can only be used for excavation and pipe burying construction is overcome, and the low-bearing-capacity pipe can be used for pipe jacking construction.

Description

Technical Field

[0001] The invention discloses a pipe jacking device capable of reducing the axial bearing capacity of the pipe. Background Art

[0002] Pipe jacking construction relies on the main top in the working pit to generate forward thrust, and transmits the jacking force to the face through pipe joints. The pipes are subject to large axial forces. Therefore, pipe jacking construction generally uses steel reinforced concrete pipes and other pipes that can withstand large axial forces. Although plastic pipes such as PVC (polyvinyl chloride) pipes, PE (polyethylene) pipes and PP (polypropylene) have many advantages such as light weight, corrosion resistance, chemical resistance, leakage resistance, smooth surface and low friction resistance, they are increasingly widely used in drainage pipes. However, due to their low axial bearing capacity, they cannot meet the requirements of conventional pipe jacking construction and can only be used in trenching and pipe burial construction. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defect in the prior art that plastic pipes cannot be used in pipe jacking construction, and to provide a pipe jacking device that can reduce the axial bearing capacity of the pipe.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] A pipe jacking device capable of reducing the axial bearing capacity of a pipe, the pipe jacking device is used to push the pipe, the pipe jacking device comprises a main top, the pipe jacking device also comprises a force transmission sleeve and a shell, the pipe is sleeved in the force transmission sleeve, the pipe matches the length of the force transmission sleeve, the shell and the main top are respectively located at two ends of the force transmission sleeve, and the shell is sleeved in the pipe.

[0006] In this solution, by setting a force transmission sleeve and a shell, when the main top pushes the pipe, the shell is subjected to pressure from the soil. Through the connection between the shell and the force transmission sleeve, the force transmission sleeve can withstand the pressure from the shell. The pipe is sleeved on the force transmission sleeve, and the main top applies a jacking force to the pipe, so that the pipe overcomes the friction resistance from the soil and is pushed. The above-mentioned setting reduces the axial force that the pipe needs to bear during the jacking construction process, thereby reducing the requirements for the axial bearing capacity of the pipe, expanding the types and range of jacking pipes, thereby overcoming the defect that low-bearing-capacity pipes can only be used for excavation and buried pipe construction, and can use low-bearing-capacity pipes for jacking construction.

[0007] Preferably, the pipe jacking equipment includes a spiral rod and a cutter disc, the spiral rod is inserted into the force transmission sleeve, the cutter disc and the main top are respectively arranged at both ends of the spiral rod, the cutter disc is connected to the spiral rod, the cutter disc can extend out of one end of the shell away from the pipe, and the main top also includes a spiral power head, which is connected to the spiral rod and is used to drive the spiral rod to drive the cutter disc to rotate.

[0008] In this scheme, through the above-mentioned arrangement, during the process of pipe jacking construction, the rotation of the cutter disc driven by the spiral rod is conducive to loosening the soil, so as to reduce the axial force exerted on the pipe during the pipe jacking construction, and reduce the axial bearing capacity requirements of the pipe, so that low-bearing-capacity pipes can be used for pipe jacking construction.

[0009] Preferably, the cutter disc can extend out of an end of the housing away from the pipe.

[0010] In this scheme, through the above-mentioned settings, during the process of pipe jacking construction, when encountering hard soil, the cutter head can be controlled to extend and over-excavate, thereby reducing the overall load of the main top during the pipe jacking process and reducing the axial bearing capacity requirements of the pipe, so that low-bearing-capacity pipes can be used for pipe jacking construction.

[0011] Preferably, the main top includes a top ring and a screw rod fixing platform, the top ring is connected to the force transmission sleeve, an adjustment cylinder is provided on the side of the top ring away from the pipe, the adjustment cylinder connects the top ring and the screw rod fixing platform, the main top also includes a screw rod connector, the screw rod is connected to the screw rod fixing platform via the screw rod connector.

[0012] In this solution, the spiral rod fixing platform is moved by adjusting the extension and contraction of the oil cylinder, and a thrust force is applied to the spiral rod and the cutter disc through the spiral rod fixing platform and the spiral rod connector, thereby extending or retracting the cutter disc relative to the end of the shell away from the pipe.

[0013] Preferably, the screw power head is arranged on a side of the screw rod fixing platform away from the screw rod connector.

[0014] In this solution, the side of the spiral rod fixing platform away from the spiral rod connector has a larger installation space, which reduces the restrictions on the size of the spiral power head and facilitates the installation of a larger spiral power head, which is beneficial to the power of the spiral rod to drive the cutter disc to rotate and is beneficial to pipe jacking construction.

[0015] Preferably, the shell has a socket, the shell is connected to the pipe via the socket, and there is a gap between the end surface of the pipe close to the shell and the shell.

[0016] In this solution, the above-mentioned arrangement facilitates the connection between the pipe and the shell, while ensuring that the pipe does not exert a jacking force on the shell, thereby reducing the axial bearing force requirements of the pipe, so that low-bearing-capacity pipes can be used for jacking construction.

[0017] Preferably, the pipe, the force transmission sleeve and the spiral rod are slidably connected.

[0018] In this scheme, through the above-mentioned arrangement, it is convenient to sleeve the pipe on the force transfer sleeve and to sleeve the force transfer sleeve on the spiral rod during the pipe jacking construction process, so that it is convenient to connect the subsequent spiral rod, force transfer sleeve and pipe after each jacking is completed, which is convenient for pipe jacking construction.

[0019] Preferably, the main top comprises a push cylinder, the push cylinder is connected to the top ring to push the force transmission sleeve through the top ring, and the main top is connected to the force transmission sleeve.

[0020] In the present solution, through the above-mentioned arrangement, the jacking cylinder is used to push the jacking ring, and exerts a jacking force on the force transmission sleeve through the connection between the jacking ring and the force transmission sleeve, and transmits force through the force transmission sleeve, thereby reducing the axial force that the pipe needs to bear during the jacking construction process, thereby reducing the requirement for the axial bearing capacity of the pipe, so that low-bearing-capacity pipes can be used for jacking construction.

[0021] Preferably, the main top further includes a pressure equalizing ring, which is arranged on a side of the top ring close to the pipe, a force sensor is circumferentially arranged between the pressure equalizing ring and the top ring, and the pipe is connected to the pressure equalizing ring.

[0022] In this solution, the top ring transmits the jacking force to the equalizing ring through the force sensor, and the equalizing ring transmits the jacking force to the pipe. The force sensor ensures that the pipe is subjected to uniform circumferential thrust, reducing the risk of pipe displacement during the jacking construction process. At the same time, it is convenient to monitor the axial force on the pipe and reduce the risk of pipe damage due to excessive axial force.

[0023] Preferably, the screw power head is arranged on a side of the screw rod fixing platform away from the screw rod connector, and the screw power head is used to drive the screw rod to rotate.

[0024] Preferably, the pipe is one of a PVC pipe, a PE pipe and a PP pipe.

[0025] In this solution, by setting a force transmission sleeve and a shell, when the main top pushes the pipe, the shell is subjected to pressure from the soil. Through the connection between the shell and the force transmission sleeve, the force transmission sleeve can withstand the pressure from the shell. The pipe is sleeved on the force transmission sleeve, and the main top applies a jacking force to the pipe, so that the pipe overcomes the friction resistance from the soil and is pushed. The above-mentioned setting reduces the axial force that the pipe needs to bear during the jacking construction process, thereby reducing the requirements for the axial bearing capacity of the pipe, and expanding the types and range of jacking pipes, so that low-bearing-capacity pipes can be used for jacking construction, such as PVC (polyvinyl chloride) pipes, PE (polyethylene) pipes, PP (polypropylene) and other plastic pipes. Plastic pipes are light in weight, good in corrosion resistance, good in chemical resistance, anti-leakage, smooth surface and low friction resistance, and are suitable for drainage pipes.

[0026] Preferably, the shell, the tube and the force transmission sleeve are arranged concentrically.

[0027] In this solution, through the above-mentioned settings, the risk of pipe deviation during the pipe jacking construction process is reduced, which is conducive to the smooth progress of the pipe jacking construction.

[0028] The positive and progressive effect of the present invention is that by setting a force transmission sleeve and a shell, when the main top pushes the pipe, the shell is subjected to pressure from the soil. Through the connection between the shell and the force transmission sleeve, the force transmission sleeve can withstand the pressure from the shell. The pipe is sleeved on the force transmission sleeve, and the main top applies a jacking force to the pipe, so that the pipe overcomes the friction resistance from the soil and is pushed. The above-mentioned setting reduces the axial force that the pipe needs to bear during the jacking construction process, thereby reducing the requirements for the axial bearing capacity of the pipe, expanding the types and range of jacking pipes, so that low-bearing-capacity pipes can be used for jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the pipe jacking equipment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of the spiral rod of the pipe jacking device of the present invention;

[0031] Figure 3 It is a structural schematic diagram of a force transmission sleeve of a pipe jacking device of the present invention; Figure 4 It is a schematic diagram of the connection structure between the force transmission sleeve and the shell of the pipe jacking equipment of the present invention;

[0032] Figure 5 It is a schematic diagram of the connection structure of the main jacking pipe of the pipe jacking equipment of the present invention;

[0033] Figure 6 It is a schematic diagram of the connection structure between the pipe and the shell of the pipe jacking equipment of the present invention;

[0034] Figure 7 It is a structural schematic diagram of a top ring, a force sensor and a pressure equalizing ring of a pipe jacking device of the present invention.

[0035] Description of reference numerals:

[0036] Back wall 1

[0037] Screw power head 2

[0038] Screw rod fixed platform 3

[0039] Adjustment cylinder 4

[0040] Push cylinder 5

[0041] Screw rod connector 6

[0042] Top ring 7

[0043] Force sensor 8

[0044] Pressure equalizing ring 9

[0045] Pipe 10

[0046] Power transmission sleeve 11

[0047] Screw rod 12

[0048] Housing 13

[0049] Knife plate 14 DETAILED DESCRIPTION

[0050] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0051] The present invention provides a pipe jacking device capable of reducing the axial bearing capacity of the pipe. Figure 1 As shown, the pipe jacking equipment is used to push the pipe 10, and the pipe jacking equipment includes a main top, and the pipe jacking equipment also includes a force transmission sleeve 11 and a shell 13. The pipe 10 is sleeved on the force transmission sleeve 11, and the length of the pipe 10 matches that of the force transmission sleeve 11. The shell 13 and the main top are respectively located at both ends of the force transmission sleeve 11, and the shell 13 is sleeved on the pipe 10.

[0052] By setting the force transmission sleeve 11 and the shell 13, the shell 13 is subjected to the pressure from the soil during the process of the main jack pushing the pipe 10. Through the connection between the shell 13 and the force transmission sleeve 11, the force transmission sleeve 11 can withstand the pressure from the shell 13. The pipe 10 is sleeved on the force transmission sleeve 11, and the main jack applies a jacking force to the pipe 10, so that the pipe 10 overcomes the friction resistance from the soil and is pushed. The above-mentioned setting reduces the axial force that the pipe 10 needs to bear during the jacking construction process, thereby reducing the requirements for the axial bearing capacity of the pipe 10, expanding the types and range of jacking pipes 10, thereby overcoming the defect that low-bearing-capacity pipes 10 can only be used for excavation and buried pipe construction, and can use low-bearing-capacity pipes 10 for jacking construction.

[0053] In this embodiment, if Figure 3 and Figure 4 As shown, the force transmission sleeve 11 is bolted to the top ring 7, the force transmission sleeves 11 are bolted to each other, and the force transmission sleeve 11 is bolted to the housing 13. In other alternative embodiments, the force transmission sleeve 11 and the top ring 7, the force transmission sleeves 11 and the housing 13 can also be connected in a detachable manner by means of a buckle or an insert interface.

[0054] In specific implementation, the length of the pipe 10 matches that of the force transmission sleeve 11. Preferably, the force transmission sleeve 11 has three types: standard force transmission sleeve, extended force transmission sleeve and shortened force transmission sleeve. The standard force transmission sleeve is consistent with the design length of the pipe section, the extended force transmission sleeve is 2 cm longer than the design length of the pipe section; the shortened force transmission sleeve is 2 cm shorter than the design length of the pipe section. When the pipe 10 is sleeved on the force transmission sleeve 11, the number of the pipe 10 is relative to the number of the force transmission sleeve 11. Preferably, the shell 13 is connected to the pipe 10 through a socket. Since both the force transfer sleeve 11 and the pipe 10 have manufacturing errors and different stiffnesses, different micro-bends will be generated between the force transfer sleeve 11 and the pipe 10 due to the action of the axial force. In the process of pushing the pipe 10, the micro-bends generated between the force transfer sleeve 11 and the pipe 10 continue to accumulate, causing the gap between the shell 13 and the pipe 10 to become larger or smaller. Therefore, it is necessary to use force transfer sleeves 11 of different lengths to adjust the gap between the shell 13 and the pipe 10 to ensure that the gap is within a safe range. The pipe jacking equipment in this embodiment is used for pipe jacking construction. According to the designed route, a working well or a receiving well is built at a certain distance. The main top is located in the working well. The shell 13 and the pipe 10 behind it and the force transmission sleeve 11 inside the pipe 10 are pushed into the receiving well. The pipe section length of the force transmission sleeve 11 corresponds to the pipe section length of the pipe 10. The pipe 10 with the force transmission sleeve 11 is pushed into the soil through the main top. After each section is pushed in, the main top retracts, and a new pipe 10 is placed on the main top concentric with the pipe 10, and the new pipe 10 continues to be pushed in.

[0055] As a preferred implementation, Figure 1 As shown, the pipe jacking equipment includes a spiral rod 12 and a cutter disc 14. The spiral rod 12 is inserted into the force transmission sleeve 11. The cutter disc 14 and the main top are respectively arranged at both ends of the spiral rod 12. The cutter disc 14 is connected to the spiral rod 12. The cutter disc 14 can extend out of the shell 13 away from one end of the pipe 10. The main top also includes a spiral power head 2, which is connected to the spiral rod 12 and is used to drive the spiral rod 12 to drive the cutter disc 14 to rotate.

[0056] In this embodiment, if Figure 2 As shown, the spiral rods 12 are connected by bolts, and the spiral rod 12 is connected to the cutter head 14 by bolts.

[0057] Through the above arrangement, during the process of pipe jacking construction, the rotation of the cutter head 14 driven by the spiral rod 12 is conducive to loosening the soil, so as to reduce the axial force exerted on the pipe 10 during the pipe jacking construction, and reduce the axial bearing requirements of the pipe 10, so that low-bearing-capacity pipes 10 can be used for pipe jacking construction.

[0058] As a preferred embodiment, the cutter disc 14 can extend out of an end of the housing 13 away from the pipe 10 .

[0059] Through the above arrangement, during the process of pipe jacking construction, when encountering hard soil, the cutter head 14 can be controlled to extend and over-dig, thereby reducing the overall load of the main top during the jacking process of the pipe 10 and reducing the axial bearing requirements of the pipe 10, so that low-bearing-capacity pipes 10 can be used for pipe jacking construction.

[0060] As a preferred implementation, Figure 1 As shown, the main top includes a top ring 7 and a screw rod fixing platform 3. The top ring 7 is connected to a force transmission sleeve 11. An adjusting cylinder 4 is provided on the side of the top ring 7 away from the pipe 10. The adjusting cylinder 4 connects the top ring 7 and the screw rod fixing platform 3. The main top also includes a screw rod connector 6. The screw rod 12 is connected to the screw rod fixing platform 3 via the screw rod connector 6.

[0061] The screw rod fixing platform 3 is driven to move by adjusting the extension and contraction of the oil cylinder 4, and a thrust force is applied to the screw rod 12 and the cutter disc 14 through the screw rod fixing platform 3 and the screw rod connector 6, so that the cutter disc 14 is extended or retracted relative to the end of the shell 13 away from the pipe 10.

[0062] In this embodiment, the base of the adjusting cylinder 4 is connected to the top ring 7 by bolts, the push rod of the adjusting cylinder 4 is connected to the screw rod fixing platform 3 by bolts, the screw power head 2 is connected to the screw rod fixing platform 3 by bolts, the screw rod connector 6 is connected to the screw rod fixing platform 3 by bolts, and the screw rod connector 6 is connected to the screw rod 12 by bolts.

[0063] As a preferred implementation, Figure 1 As shown, the screw power head 2 is arranged on a side of the screw rod fixing platform 3 away from the screw rod connector 6 .

[0064] The side of the screw rod fixing platform 3 away from the screw rod connector 6 has a larger installation space, which reduces the size restriction of the screw power head 2 and facilitates the setting of a larger screw power head 2, thereby facilitating the power of the screw rod 12 to drive the cutter disc 14 to rotate, and is beneficial to pipe jacking construction.

[0065] As a preferred implementation, Figure 6 As shown, the shell 13 has a socket, and the shell 13 is connected to the pipe 10 through the socket, and there is a gap between the end surface of the pipe 10 close to the shell 13 and the shell 13.

[0066] The above arrangement facilitates the connection between the pipe 10 and the shell 13, and ensures that the pipe 10 does not apply a thrust force to the shell 13, thereby reducing the axial bearing force requirements of the pipe 10, so that the low-bearing-force pipe 10 can be used for pipe jacking. Specifically, the circumferential outer edge of the socket extends toward the pipe 10 and overlaps with the pipe 10 in the axial direction to prevent soil from falling between the shell 13 and the pipe 10, reducing the risk of the pipe 10 being subjected to a large axial force.

[0067] In the specific implementation, the spiral rod 12 is equipped with spiral blades, and the spiral rod 12 rotates in the force transmission sleeve 11 to transport the soil to the jacking working well. The force transmission sleeve 11 and the spiral rod 12 form an excavation sleeve, which has three types: standard excavation sleeve, extended excavation sleeve and shortened excavation sleeve. The standard excavation sleeve is consistent with the design length of the pipe section, the extended spiral sleeve is 2cm longer than the design length of the pipe section; the shortened spiral sleeve is 2cm shorter than the design length of the pipe section. Figure 6 As shown, the shell 13 is connected to the pipe 10 through a socket. There are manufacturing errors in the excavated casing and the pipe 10, and the stiffness of the two is different. Due to the action of the axial force, different small bends will be generated between the excavated casing and the pipe 10. In the process of jacking the pipe 10, the small bends generated between the excavated casing and the pipe 10 are constantly accumulated, causing the gap between the shell 13 and the pipe 10 to become larger or smaller. Therefore, it is necessary to use excavated casings of different lengths to adjust the gap between the shell 13 and the pipe 10 to ensure that the gap is within a safe range. When the gap is too large, the excavated casing is shortened to reduce the gap. When the gap is too small, the excavated casing is lengthened.

[0068] As a preferred embodiment, the pipe 10, the force transmission sleeve 11 and the spiral rod 12 are slidably connected.

[0069] Through the above arrangement, it is convenient to sleeve the pipe 10 on the force transmission sleeve 11 and to sleeve the force transmission sleeve 11 on the spiral rod 12 during the pipe jacking construction process, so that the subsequent spiral rod 12, force transmission sleeve 11 and pipe 10 can be connected after each jacking is completed, which is convenient for pipe jacking construction.

[0070] As a preferred implementation, Figure 1 As shown, the main top includes a push cylinder 5, which is connected to a top ring 7 to push a force transmission sleeve 11 through the top ring 7, and the main top is connected to the force transmission sleeve 11.

[0071] Through the above arrangement, the jacking cylinder 5 is used to push the top ring 7, and exert a jacking force on the force transmission sleeve 11 through the connection between the top ring 7 and the force transmission sleeve 11, and transmit force through the force transmission sleeve 11, thereby reducing the axial force that the pipe 10 needs to bear during the jacking construction process, thereby reducing the axial bearing force requirement of the pipe 10, so that low-bearing-capacity pipe 10 can be used for jacking construction.

[0072] In this embodiment, the base of the jacking oil cylinder 5 is connected to the rear seat wall 1 by bolts, and the top ring 7 is connected to the push rod end of the jacking oil cylinder 5 by bolts.

[0073] As a preferred implementation, Figure 1 , Figure 5 and Figure 7 As shown, the main top also includes a pressure equalizing ring 9, which is arranged on the side of the top ring 7 close to the pipe 10, and a force sensor 8 is arranged circumferentially between the pressure equalizing ring 9 and the top ring 7, and the pipe 10 is connected to the pressure equalizing ring 9.

[0074] The top ring 7 transmits the jacking force to the equalizing ring 9 through the force sensor 8, and the equalizing ring 9 transmits the jacking force to the pipe 10. The force sensor 8 ensures that the pipe 10 is subjected to uniform jacking force in the circumferential direction, thereby reducing the risk of the pipe 10 being deflected during the jacking construction process. At the same time, it is convenient to monitor the axial force applied to the pipe 10, thereby reducing the risk of the pipe 10 being damaged due to excessive axial force.

[0075] In this embodiment, if Figure 5 As shown, the thrust force of the pipe 10 is provided by the pressure equalizing ring 9 and measured by the force sensor 8. The pressure equalizing ring 9 is inserted into the pipe 10.

[0076] As a preferred embodiment, the pipe 10 is one of a PVC pipe, a PE pipe and a PP pipe.

[0077] By setting the force transmission sleeve 11 and the shell 13, the shell 13 is subjected to the pressure from the soil during the process of the main top pushing the pipe 10. Through the connection between the shell 13 and the force transmission sleeve 11, the force transmission sleeve 11 can withstand the axial pressure from the shell 13. The pipe 10 is sleeved on the force transmission sleeve 11, and the main top applies a jacking force to the pipe 10, so that the pipe 10 overcomes the friction resistance from the soil and is pushed. The above-mentioned setting reduces the axial force that the pipe 10 needs to bear during the pipe jacking construction process, thereby reducing the requirements for the axial bearing force of the pipe 10, expanding the types and range of the pipe jacking pipe 10, so that the pipe jacking construction can be carried out using low-bearing-capacity pipes 10, such as PVC (polyvinyl chloride) pipes, PE (polyethylene) pipes and PP (polypropylene) and other plastic pipes 10, which are light in weight, good in corrosion resistance, good in chemical resistance, anti-leakage, smooth in surface and low in friction resistance, and are suitable for drainage pipes.

[0078] As a preferred embodiment, the shell 13 , the pipe 10 and the force transmission sleeve 11 are arranged concentrically.

[0079] In this solution, the above arrangement reduces the risk of the pipe 10 being offset during the pipe jacking construction process, which is conducive to the smooth progress of the pipe jacking construction. Preferably, a radial support can be provided between the force transmission sleeve 11 and the pipe 10 to limit the relative position between the pipe 10 and the force transmission sleeve 11.

[0080] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A pipe jacking device capable of reducing the axial bearing capacity of a pipe, the pipe jacking device being used to push the pipe, the pipe jacking device comprising a main jack, characterized in that: The pipe jacking equipment also includes a force transmission sleeve and a shell. The pipe is sleeved on the force transmission sleeve. The length of the pipe matches that of the force transmission sleeve. The shell and the main jack are respectively located at two ends of the force transmission sleeve. The shell is sleeved on the pipe.

2. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 1, characterized in that: The pipe jacking equipment includes a spiral rod and a cutter disc. The spiral rod is inserted into the force transmission sleeve. The cutter disc and the main top are respectively arranged at both ends of the spiral rod. The cutter disc is connected to the spiral rod. The cutter disc can extend out of the shell away from one end of the pipe. The main top also includes a spiral power head. The spiral power head is connected to the spiral rod and is used to drive the spiral rod to drive the cutter disc to rotate.

3. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 2, characterized in that: The cutter disc may extend out of an end of the housing away from the pipe.

4. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 3, characterized in that: The main top includes a top ring and a screw rod fixing platform, the top ring is connected to the force transmission sleeve, an adjustment cylinder is provided on the side of the top ring away from the pipe, the adjustment cylinder connects the top ring and the screw rod fixing platform, the main top also includes a screw rod connector, the screw rod is connected to the screw rod fixing platform through the screw rod connector.

5. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 4, characterized in that: The spiral power head is arranged on a side of the spiral rod fixing platform away from the spiral rod connector.

6. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 1, characterized in that: The shell has a socket, the shell is connected to the pipe via the socket, and a gap exists between the end surface of the pipe close to the shell and the shell.

7. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 2, characterized in that: The pipe, the force transmission sleeve and the spiral rod are slidably connected.

8. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 4, characterized in that: The main top comprises a push cylinder, the push cylinder is connected to the top ring so as to push the force transmission sleeve through the top ring, and the main top is connected to the force transmission sleeve.

9. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to claim 8, characterized in that: The main top also includes a pressure equalizing ring, which is arranged on a side of the top ring close to the pipe. A force sensor is circumferentially arranged between the pressure equalizing ring and the top ring, and the pipe is connected to the pressure equalizing ring.

10. The pipe jacking device capable of reducing the axial bearing capacity of the pipe according to any one of claims 1 to 9, characterized in that: The pipe is one of a PVC pipe, a PE pipe and a PP pipe; And / or, the shell, the pipe and the force transmission sleeve are arranged concentrically.

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