Support platform for pipe jacking construction

Abstract

The application discloses a support platform for pipe jacking construction and relates to the technical field of pipe jacking construction.The support platform comprises a support mechanism, a transmission mechanism, a lifting mechanism and a calibration mechanism.The support mechanism comprises a bottom plate, a support frame arranged on the bottom plate, a guide frame arranged outside the support frame, and a reference plate arranged at the end of the bottom plate and not in contact with the bottom plate.The transmission mechanism is arranged above the support mechanism, and the end of the transmission mechanism is provided with the lifting mechanism.The lifting mechanism is provided with a limiting mechanism outside the lifting mechanism, and the lifting mechanism is provided with the jacking mechanism outside the lifting mechanism.The lifting mechanism is connected with the calibration mechanism, and the calibration mechanism is arranged below the support mechanism.The calibration mechanism is arranged below the support mechanism.The support platform for pipe jacking construction can level the bottom plate during use, avoids the inclination of the bottom plate and the inclination of the pipeline, and makes the pipeline change position during jacking operation.

Description

Technical Field

[0001] This invention relates to the field of pipe jacking construction technology, and in particular to a support platform for pipe jacking construction. Background Technology

[0002] Pipe jacking is a trenchless construction method, a technology for laying pipelines with little or no excavation. In pipe jacking, the jacking force generated by jacking equipment within a working pit overcomes the friction between the pipe and the surrounding soil, pushing the pipe into the ground at the designed slope, and then removing the excavated soil. After one section of pipe is jacked into the soil, the second section is lowered and the jacking continues. The principle is to use the thrust of the main jacking cylinder and the pipe sections, intermediate sections, etc., to advance the tool pipe or tunneling machine from the working pit through the soil layer to the receiving pit where it is lifted. The pipeline follows closely behind the tool pipe or tunneling machine, buried between the two pits. During pipe jacking construction, a support platform is installed below the jacking pipe to ensure that the pipe is jacked along the required path.

[0003] Chinese invention patent CN114738551A discloses a variable-diameter self-locking pipe jacking machine head support structure. It includes a head support, a pressure equalizing ring, a top iron, a hydraulic cylinder, and a slide. The head support and hydraulic cylinder are mounted on the slide. The top iron is fixed to the hydraulic cylinder, and the pressure equalizing ring is fixed to the top iron. The pressure equalizing ring and the head support support the pipe. The head support includes a support plate, an intermediate plate, a specification conversion plate, and a base plate. The head support supports the outer diameter of the pipe, and the inner diameter of the pipe is connected to the top iron through the pressure equalizing ring. The head support is mounted on the slide, and the hydraulic cylinder pushes the top iron to slide back and forth on the slide. The movement of the top iron will not pass over the head support. The beneficial effects of this invention are: multiple head and pipe jacking operations can be performed in the same starting well; the axis of the head and pipe is aligned on the guide rail; the structure is compact, the conversion process is simple, and the operation is convenient; it has strong adaptability and can be customized and added.

[0004] However, although the above-mentioned pipe jacking device can perform various jacking operations with different heads and pipes, the base plate is placed on the bottom surface during the jacking operation. During the construction of the foundation pit, the base may become uneven due to the influence of the bottom surface of the foundation pit. In this case, the jacking position may not reach the required position. Furthermore, the foundation pit base may also change due to vibration during the jacking operation, which in turn causes the base to change, resulting in a change in the position of the pipe placed on the base, thus affecting the pipe jacking construction. Summary of the Invention

[0005] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The present invention provides a support platform for pipe jacking construction to solve existing technical problems.

[0006] The present invention adopts the following technical solution: a support platform for pipe jacking construction, including a support mechanism, the support mechanism including a base plate, a support frame provided on the base plate, a guide frame provided on the outside of the support frame, a reference plate provided at the end of the base plate, and the reference plate not in contact with the base plate, and also including a transmission mechanism, the transmission mechanism being provided above the support mechanism, a lifting mechanism being provided at the end of the transmission mechanism, a limit mechanism being provided on the outside of the lifting mechanism, a jacking mechanism being provided outside the lifting mechanism, the lifting mechanism being connected to a calibration mechanism, and the calibration mechanism being located below the support mechanism, and an adjustment mechanism being provided below the support mechanism.

[0007] Furthermore, the transmission mechanism includes a support plate located above the base plate. A transmission rack is fixedly mounted on the bottom surface of the support plate. A transmission gear is mounted on the left side of the transmission rack, and a connecting rack is mounted below the transmission gear, with the connecting rack located on both sides of the transmission rack. A connecting plate is mounted at the end of the connecting rack.

[0008] Furthermore, the transmission gear is meshed with the transmission rack, and the transmission gear is also meshed with the connecting rack.

[0009] Furthermore, the jacking mechanism includes a jacking plate, which is disposed above the base plate and located at the end of the guide frame. A plurality of jacking cylinders are equidistantly arranged on the inner side of the jacking plate, and a jacking frame is provided at the end of the plurality of jacking cylinders. The jacking frame is slidably connected to the guide frame, and a guide rod is provided between the jacking frame and the jacking plate.

[0010] Furthermore, the lifting mechanism includes a conical column, which is fixedly connected to the reference plate and is disposed between the top plate and the top cylinder. A sleeve is provided on the outer sleeve of the conical column, and several mating plates are provided between the sleeve and the conical column. Each mating plate has a sleeve on its outer end face, which is disposed through the sleeve. A contact head is movably disposed in each sleeve.

[0011] Furthermore, the calibration mechanism includes several connecting pipes, each connecting pipe being connected to a corresponding sleeve, each connecting pipe having an oil storage tank at its end, and each oil storage tank having a transmission pipe at both ends.

[0012] Furthermore, the adjustment mechanism includes a base located on both sides of the oil tank and connected to the oil tank via transmission pipes. Each base is connected to two transmission pipes. A telescopic seat is provided in the base and connected to the bottom surface of the base plate. An adjusting rack is provided on one side of the telescopic seat, and a sealing plate is provided on the bottom surface of the telescopic seat. A central column is provided on one side of the telescopic seat. Several pawls are equidistantly arranged on the outer surface of the central column. A ratchet is provided outside the pawls, and an adjusting gear is provided outside the ratchet. The adjusting gear meshes with the adjusting rack.

[0013] Furthermore, the limiting mechanism includes a connecting block, which is disposed on the outside of the sleeve, and a movable block is slidably connected inside the connecting block. The movable block is L-shaped, and a limiting rod is provided below the movable block. The limiting plate is connected to the top plate, and a locking plate is provided below the end of the top plate. The locking plate is connected to the corresponding top cylinder, and the end of the limiting plate is designed with a bevel.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] Firstly, through the coordinated action of the calibration and adjustment mechanisms, if the pipeline shifts due to settlement of the base plate during pipe jacking, the settled base plate can be automatically leveled during the jacking operation. This prevents the pipeline from shifting position during jacking, thus avoiding construction problems. During the jacking operation, the lifting mechanism enters the pipeline during placement. As the jacking mechanism advances, the lifting mechanism lifts the pipeline. During this lifting process, due to the tilting of the pipeline, the lifting mechanism... One of the contact heads will first touch the inner wall of the pipe. Due to continuous jacking, the contact head will be squeezed inward. When the contact head is squeezed inward, it will simultaneously squeeze the internal oil. The oil is transferred to the corresponding oil storage tank through the connecting pipe. The liquid in the oil storage tank will squeeze the corresponding adjustment mechanism, thereby adjusting the adjustment mechanism to achieve the effect of adjusting the base plate. When the base plate shifts, or when there is settlement or unevenness in a certain part of the base plate, it can be automatically leveled to avoid the unevenness of the base plate affecting the jacking operation.

[0016] Secondly, during use, the leveled lifting mechanism can support and limit the pipeline, preventing the pipeline from shifting in position due to objects on the support frame during jacking operations, thus affecting the jacking operation. Furthermore, because the lifting mechanism supports the pipeline, it reduces the downward force on the pipeline. Since the pipeline surface is generally uneven, and the outer surface of the pipeline is in direct contact with the support frame, the contact surface between the support frame and the pipeline may become uneven with continuous jacking operations, affecting the jacking operation. However, because the support frame supports the pipeline, it reduces the friction between the pipeline and the support frame. Reduced friction decreases the wear of the support frame, increasing its service life and enhancing its guiding function.

[0017] Thirdly, the lifting and adjusting mechanisms can operate without an external power source during use. Since the calibration mechanism works in conjunction with the lifting mechanism, during the initial operation of the lifting mechanism, the weight of the pipeline itself can move the lifting mechanism to the outer wall of the pipeline. When the lifting mechanism moves to the outer wall of the pipeline, the jacking mechanism will drive the lifting mechanism to operate, allowing the lifting mechanism to lift the pipeline. During the lifting process, several contact heads are used to sense whether the pipeline is tilted. If tilting occurs, the calibration mechanism will cause the adjusting mechanism to adjust it. This allows the device to be adjusted without an external power source during use, reducing energy waste.

[0018] In summary, when in use, this device can automatically level the base plate without the need for an additional power source, preventing construction errors caused by base plate tilting. At the same time, during the jacking operation, it can also reduce the friction between the pipe and the support frame, preventing excessive wear of the support frame from causing the pipe placed on the support frame to tilt. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the support mechanism structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the calibration mechanism structure of the present invention;

[0024] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0025] Figure 6 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the adjustment mechanism of the present invention.

[0027] Figure label:

[0028] 1. Support mechanism; 11. Base plate; 12. Support frame; 13. Guide frame; 14. Reference plate; 2. Transmission mechanism; 21. Support plate; 22. Transmission rack; 23. Transmission gear; 24. Connecting rack; 25. Connecting plate; 3. Jacking mechanism; 31. Guide rod; 32. Jacking frame; 33. Jacking cylinder; 34. Jacking plate; 4. Lifting mechanism; 41. Sleeve; 42. Mating plate; 43. Contact head; 44. Sleeve; 45. Conical column; 5. Calibration mechanism; 51. Connecting pipe; 52. Oil tank; 6. Adjustment mechanism; 61. Base; 62. Sealing plate; 63. Center column; 64. Pawl; 65. Ratchet; 66. Telescopic seat; 7. Limiting mechanism; 71. Movable block; 72. Connecting block; 73. Limiting rod; 74. Locking plate. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] The following is combined with Figures 1 to 7 As shown, this embodiment of the invention provides a support platform for pipe jacking construction, including a support mechanism 1. The support mechanism 1 includes a base plate 11, a support frame 12 is provided on the base plate 11, a guide frame 13 is provided on the outside of the support frame 12, a reference plate 14 is provided at the end of the base plate 11 and the reference plate 14 does not contact the base plate 11, and also includes a transmission mechanism 2, which is located above the support mechanism 1. A lifting mechanism 4 is provided at the end of the transmission mechanism 2, a limit mechanism 7 is provided on the outside of the lifting mechanism 4, a jacking mechanism 3 is provided outside the lifting mechanism 4, the lifting mechanism 4 is connected to a calibration mechanism 5 and the calibration mechanism 5 is located below the support mechanism 1, and an adjustment mechanism 6 is provided below the support mechanism 1.

[0035] When in operation, this device can automatically level the base plate 11 without the use of an additional power source, preventing construction errors caused by the tilting of the base plate 11. At the same time, it can reduce the friction between the pipe and the support frame 12 during the jacking operation, preventing the pipe placed on the support frame 12 from tilting due to excessive wear.

[0036] Specifically, the transmission mechanism 2 includes a support plate 21, which is located above the base plate 11. A transmission rack 22 is fixedly installed on the bottom surface of the support plate 21. A transmission gear 23 is installed on the left side of the transmission mechanism. A connecting rack 24 is installed below the transmission gear 23 and is located on both sides of the transmission rack 22. A connecting plate 25 is installed at the end of the connecting rack 24.

[0037] Specifically, the transmission gear 23 is meshed with the transmission rack 22, and the transmission gear 23 is meshed with the connecting rack 24.

[0038] During operation, when the pipe is placed on the support plate 21, the support plate 21 will move downwards due to gravity. As the support plate 21 moves downwards, it will drive the transmission rack 22 to move. The movement of the transmission rack 22 will drive the transmission gear 23 to rotate, thereby causing the connecting rack 24 to move. This allows the connecting plate 25 to move by utilizing the weight of the pipe itself, thus reducing energy consumption.

[0039] Specifically, the jacking mechanism 3 includes a jacking plate 34, which is disposed above the base plate 11 and located at the end of the guide frame 13. A plurality of jacking cylinders 33 are equidistantly arranged on the inner side of the jacking plate 34. A jacking frame 32 is provided at the end of the plurality of jacking cylinders 33. The jacking frame 32 is slidably connected to the guide frame 13. A guide rod 31 is provided between the jacking frame 32 and the jacking plate 34.

[0040] During operation, the pipe can be pushed forward using the jacking mechanism 3.

[0041] Specifically, the lifting mechanism 4 includes a conical column 45, which is fixedly connected to the reference plate 14 and is disposed between the top plate 34 and the top cylinder 33. A sleeve 41 is provided on the outer sleeve of the conical column 45, and a plurality of mating plates 42 are provided between the sleeve 41 and the conical column 45. Each mating plate 42 is provided with a sleeve 44 on its outer end face, and the sleeve 44 is disposed through the sleeve 41. A contact head 43 is movably disposed in each sleeve 44.

[0042] Specifically, the calibration mechanism 5 includes a plurality of connecting pipes 51, each connecting pipe 51 being connected to a corresponding sleeve 44, each connecting pipe 51 having an oil storage tank 52 at its end, and each oil storage tank 52 having a transmission pipe at both ends.

[0043] Specifically, the adjustment mechanism 6 includes a base 61 located on both sides of the oil tank 52 and connected to the oil tank 52 via transmission pipes. Each base 61 is connected to two transmission pipes. A telescopic seat 66 is provided in the base 61 and connected to the bottom surface of the base plate 11. An adjusting rack is provided on one side of the telescopic seat 66, and a sealing plate 62 is provided on the bottom surface of the telescopic seat 66. A central column 63 is provided on one side of the telescopic seat 66. A plurality of pawls 64 are equidistantly arranged on the outer surface of the central column 63. A ratchet 65 is provided outside the pawls 64, and an adjusting gear is provided outside the ratchet 65. The adjusting gear meshes with the adjusting rack.

[0044] During operation, through the coordinated action of calibration mechanism 5 and adjustment mechanism 6, if the base plate 11 settles and causes the pipeline to shift during the pipe jacking process, the settled base plate 11 can be automatically leveled during the jacking operation. This prevents the pipeline from shifting position during jacking, thus avoiding construction problems. During the jacking operation, when placing the pipeline, the lifting mechanism 4 enters the pipeline. When the jacking mechanism 3 jacks, the lifting mechanism 4 lifts the pipeline. During the lifting process, due to the tilting of the pipeline, a certain contact point in the lifting mechanism 4... The contact head 43 will first touch the inner wall of the pipe. Due to continuous jacking, the contact head 43 will be squeezed inward. When the contact head 43 is squeezed inward, it will simultaneously squeeze the internal oil. The oil is transferred to the corresponding oil storage tank 52 through the connecting pipe 51. The liquid in the oil storage tank 52 will squeeze the corresponding adjustment mechanism 6, thereby adjusting the adjustment mechanism 6 to achieve the effect of adjusting the base plate 11. When the base plate 11 shifts, it can automatically level itself when there is settlement or unevenness in a certain part of the base plate 11, so as to avoid the unevenness of the base plate 11 affecting the jacking operation.

[0045] Specifically, the limiting mechanism 7 includes a connecting block 72, which is disposed on the outside of the sleeve 41, and a movable block 71 is slidably connected inside the connecting block 72. The movable block 71 is L-shaped, and a limiting rod 73 is provided below the movable block 71. The limiting plate is connected to the top plate 34, and a locking plate 74 is provided below the end of the top plate 34. The locking plate 74 is connected to the corresponding top cylinder 33, and the end of the limiting plate is designed with a bevel.

[0046] During operation, after the lifting mechanism 4 makes an initial displacement through the transmission mechanism 2, the connecting block 72 will move synchronously with the sleeve 41 in the lifting mechanism 4. When the connecting block 72 moves to a certain position, the limiting rod 73 located below the movable block 71 will not contact the movable block 71. At this time, the movable block 71 will move downward under its own weight, thereby engaging with the locking plate 74. At this time, the lifting mechanism 4 can continue to move forward under the influence of the pushing mechanism 3.

[0047] Working principle: In use, first, place the base plate 11 on the excavated pit bottom surface, connect the base plate to the inner wall, and connect the conical column 45 to the reference plate 14. At this time, the base plate 11 may tilt to a certain extent due to the influence of the pit bottom surface. However, since the reference plate 14 is connected to the inner wall, it will not tilt due to the bottom influence. Then, place the pipe on the support plate 21. The support plate 21 will move downward due to the weight of the pipe. Since the transmission rack 22 is fixedly connected to the support plate 21, the transmission rack 22 will move downward synchronously during the downward movement of the support plate 21. At the same time, since the transmission rack 22 is meshed with the transmission gear 23, the transmission gear 23 will engage during the downward movement of the transmission rack 22. The transmission gear 23 rotates, and because the transmission gear 23 meshes with the connecting rack 24, the rotation of the transmission gear 23 drives the connecting rack 24 to move. The movement of the connecting rack 24 drives the connecting plate 25 to move. Since the connecting plate 25 is fixedly connected to the sleeve 41, the movement of the connecting rack 24 drives the sleeve 41 to move synchronously. Because the sleeve 41 is fitted over the tapered column 45, the gap between the sleeve 41 and the tapered column 45 gradually decreases during the movement of the sleeve 41. At this time, the sleeve 44 set in the sleeve 41 also moves outward due to the decrease in gap. When the support plate 21 stops moving downward, the front end of the sleeve 41 enters the pipe, and the sleeve 44 is also located in the pipe. And because the sleeve 41 and the connecting block 72 are fixedly connected, the sleeve 41 moves outward. In the fixed connection, the connecting block 72 will move synchronously with the sleeve 41 in the lifting mechanism 4. When the connecting block 72 moves to a certain position, the limiting rod 73 located below the movable block 71 will not contact the movable block 71. At this time, the movable block 71 will move downward under its own weight, thus engaging with the locking plate 74. After the pipeline is placed, the jacking mechanism 3 is started. During the movement of the jacking mechanism 3, the sleeve 41 will continue to move. When the pipeline tilts, one of the contact heads will first touch the inner wall of the pipeline. Since the sleeve 41 is still moving, the contact head will move inward. When the contact head moves inward, it will squeeze the oil in the sleeve 44. The oil in this location will move to the corresponding oil storage tank 5 through the connecting pipe 51. Within 2, the oil in the oil tank 52 enters the corresponding base 61, thereby raising the telescopic seat 66 within the corresponding base 61, thus achieving the effect of leveling the base plate 11. After adjustment, the position is fixed by the ratchet 65 and pawl 64 to prevent the telescopic seat 66 from shifting downwards due to gravity. Simultaneously, during use, the leveled contact head can provide support and limit for the pipeline, preventing the pipeline from shifting due to objects on the support frame 12 during jacking operations, thus affecting the jacking operation. Furthermore, because the contact head supports the pipeline, it also reduces the downward force on the pipeline during the support process, since the pipeline surface is generally uneven.The outer surface of the pipe is in direct contact with the support frame 12. With continuous jacking operations, the contact surface between the support frame 12 and the pipe may become uneven, affecting the jacking process. However, because the support frame 12 provides support for the pipe, it reduces the friction between the pipe and the support frame 12. Reduced friction leads to less wear on the support frame 12, increasing its service life and enhancing its guiding function.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support platform for pipe jacking construction, comprising a support mechanism (1), the support mechanism (1) comprising a base plate (11), a support frame (12) provided on the base plate (11), a guide frame (13) provided on the outer side of the support frame (12), and a reference plate (14) provided at the end of the base plate (11), wherein the reference plate (14) does not contact the base plate (11), characterized in that; It also includes a transmission mechanism (2), which is located above the support mechanism (1). The end of the transmission mechanism (2) is provided with a lifting mechanism (4). A limit mechanism (7) is provided on the outside of the lifting mechanism (4). A push-in mechanism (3) is provided on the outside of the lifting mechanism (4). The lifting mechanism (4) is connected to the calibration mechanism (5), and the calibration mechanism (5) is located below the support mechanism (1). An adjustment mechanism (6) is provided below the support mechanism (1). The adjustment mechanism (6) includes a base (61), which is located on both sides of the oil tank (52) and is connected to the oil tank (52) through a transmission pipe. Each base (61) is connected to two transmission pipes. A telescopic seat (66) is provided in the base (61). The telescopic seat (66) is connected to the bottom surface of the base plate (11). An adjusting rack is provided on one side of the telescopic seat (66). A sealing plate (62) is provided on the bottom surface of the telescopic seat (66). A central column (63) is provided on one side of the telescopic seat (66). A plurality of pawls (64) are equidistantly provided on the outer surface of the central column (63). A ratchet (65) is provided outside the pawls (64). An adjusting gear is provided outside the ratchet (65). The adjusting gear is meshed with the adjusting rack. The transmission mechanism (2) includes a support plate (21), which is located above the base plate (11). A transmission rack (22) is fixedly provided on the bottom surface of the support plate (21). A transmission gear (23) is provided on the left side of the transmission rack (22). A connecting rack (24) is provided below the transmission gear (23) and is located between the two transmission racks (22). A connecting plate (25) is provided at the end of the connecting rack (24). The transmission gear (23) is meshed with the transmission rack (22), and the transmission gear (23) is meshed with the connecting rack (24); The lifting mechanism (4) includes a conical column (45), which is fixedly connected to the reference plate (14). A sleeve (41) is provided on the outer sleeve of the conical column (45). Several mating plates (42) are provided between the sleeve (41) and the conical column (45). Each mating plate (42) has a sleeve (44) on its outer end face, and the sleeve (44) passes through the sleeve (41). A contact head (43) is movably provided in each sleeve (44). The calibration mechanism (5) includes several connecting pipes (51), each connecting pipe (51) is connected to the corresponding sleeve (44), each connecting pipe (51) has an oil storage tank (52) at its end, and each oil storage tank (52) has a transmission pipe at both ends.

2. The support platform for pipe jacking construction according to claim 1, characterized in that; The jacking mechanism (3) includes a jacking plate (34), which is located above the base plate (11) and at the end of the guide frame (13). A plurality of jacking cylinders (33) are equidistantly arranged on the inner side of the jacking plate (34). A jacking frame (32) is provided at the end of the plurality of jacking cylinders (33). The jacking frame (32) is slidably connected to the guide frame (13). A guide rod (31) is provided between the jacking frame (32) and the jacking plate (34).

3. The support platform for pipe jacking construction according to claim 2, characterized in that; The limiting mechanism (7) includes a connecting block (72), which is located on the outside of the sleeve (41). A movable block (71) is slidably connected inside the connecting block (72). The movable block (71) is L-shaped. A limiting rod (73) is provided below the movable block (71). The limiting rod (73) is connected to the top plate (34). A locking plate (74) is provided below the end of the limiting rod (73). The locking plate (74) is connected to the corresponding top cylinder (33). The end of the limiting rod (73) is designed with a bevel.

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