Special lifting appliance for rectangular pipe-jacking pipe joint experiment support frame

Abstract

The invention provides a special lifting appliance for a rectangular pipe-jacking pipe joint experiment supporting frame, and relates to the technical field of rectangular pipe-jacking pipe joint experiment instruments.The special lifting appliance comprises a compression-resistant experiment supporting frame, a steel cable pulling plate is connected to the exterior of the compression-resistant experiment supporting frame through a steel cable, and four direction-dividing connecting frames are fixedly connected to the upper portion of the compression-resistant experiment supporting frame; the middle of the face, away from the center of the compression resistance experiment supporting frame, of the direction-dividing connecting frame is fixedly connected with a direction-dividing lifting mechanism, a pipe joint is supported from multiple points through multiple sets of lifting supporting tables and movable supporting tables, and when the pressure-bearing strength test is conducted, if the pipe joint is locally fractured under the pressure effect, the pipe joint can be lifted out of the direction-dividing connecting frame. The broken part can be supported by the bearing structure composed of the lifting supporting table and the movable supporting table below the broken part, falling is avoided, the other pipe joints are also supported by the bearing structure composed of the lifting supporting tables and the movable supporting tables, the situation that the pipe joints lose balance and fall due to breakage is avoided, damage to a testing site and testing equipment is avoided, and the testing efficiency is improved. And safety accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rectangular pipe jacking section experimental equipment, in particular to a special hanger for a rectangular pipe jacking section experimental support frame. Background Art

[0002] The rectangular jacking pipe segment is a component that constitutes the main body of the tunnel. It refers to the structural unit that is assembled segment by segment during the jacking process to form the permanent lining of the tunnel. Its design must meet the requirements of strength, waterproofness, construction adaptability, etc. In the strength test experiment of the rectangular jacking pipe segment, centripetal pressure is applied to the rectangular jacking pipe to observe whether the rectangular jacking pipe is deformed, cracked or even broken when the pressure increases. In the traditional testing method, a special test support frame is set at the center of the rectangular jacking pipe segment, and several pull plates are distributed and installed on the outer surface of the rectangular jacking pipe segment. The pull plate is connected to the support frame by a steel cable, and the steel cable is pulled by an external tool, so that the external pull plate of the pipe segment approaches the center of the pipe segment under the action of the contraction of the steel cable, and the centripetal pressure is applied to the pipe segment, thereby realizing the strength test of the rectangular jacking pipe segment.

[0003] In the traditional rectangular jacking pipe segment strength test experiment, the rectangular jacking pipe segment to be tested needs to be lifted to the outside of the support frame by a hoist, and the pipe segment is suspended at an appropriate height by the hoist during the test. In the traditional hoisting method of the pipe segment, it is generally lifted by local fixation and hooks and rings. The hoist is prone to shaking during the arrangement of pull plates and steel cables in the suspended state, which increases the difficulty of threading the steel cables and arranging the pull plates. If the pipe segment breaks during the test, the broken part will fall quickly if it lacks support, causing the suspension of the pipe segment by the hoist to lose balance and tilt. The damaged pipe segment collides with the ground or the support frame, causing damage to the experimental site and even causing safety accidents. Summary of the Invention

[0004] The present invention provides a special hanger for a rectangular jacking pipe segment experimental support frame to solve the problem that the hanger is prone to shaking during the arrangement of pull plates and steel cables in a suspended state, which increases the difficulty of threading the steel cables and arranging the pull plates; if the pipe segment breaks during the test, the broken part will fall quickly if it lacks support, causing the hanger to lose balance and tilt in its suspension of the pipe segment, and the damaged pipe segment will collide with the ground or the support frame, causing damage to the experimental site and even causing safety accidents.

[0005] The present invention provides a special hanger for a rectangular jacking pipe section test support frame, which specifically includes: a compression test support frame, the compression test support frame is connected to a steel cable pull plate outside the compression test support frame by steel cables, and four directional connecting frames are fixedly connected to the top of the compression test support frame, and the middle of a side of the directional connecting frame away from the center of the compression test support frame is fixedly connected to a directional lifting mechanism, and the bottom of the directional lifting mechanism is connected to a lifting hanger by bolts. The outside of the directional connecting frame is fixedly connected to a directional guide rod, the directional guide rod is perpendicular to the upper surface of the compression test support frame, and the lower end of the directional guide rod is fixedly connected to the support foot of the compression test support frame, and two ends of the hanger connecting beam are respectively welded with a lifting support platform, the rear of the lifting support platform is movably connected to the directional guide rod, and a movable support platform is movably installed above the lifting support platform, and the upper surface of the movable support platform is rotatably connected to a transverse support tube, and the axis of the transverse support tube is perpendicular to the end face of the movable support platform away from the compression test support frame.

[0006] Furthermore, one end of the lifting support platform close to the center of the compression test support frame is provided with a support platform guide port slidably connected to the directional guide rod, and the lifting support platform is parallel to the upper surface of the compression test support frame.

[0007] Furthermore, side limiting flanges are provided on the upper edges of both side surfaces of the lifting support platform, and the two side surfaces of the movable support platform are fixedly connected with the support platform limiting side edges, and the side limiting flanges are slidably connected inside the support platform limiting side edges.

[0008] Furthermore, a limiting wheel track is provided on the upper surface of the lifting support platform, and the lower surface of the movable support platform is rotatably connected with front and rear support cylinders, the axes of the front and rear support cylinders are parallel to the sides of the movable support platform, and the front and rear support cylinders are rollingly connected inside the limiting wheel track.

[0009] Furthermore, a side guide frame is fixedly connected to each of the two sides of the lifting support platform, and a rectangular guide opening is longitudinally provided inside the side guide frame.

[0010] Furthermore, a stabilizing support frame is provided below the lifting support platform. The stabilizing support frame is in a "U"-shaped structure, and the connecting plates on both sides of the stabilizing support frame are slidably connected to the internal guide openings of the side guide frames on both sides.

[0011] Furthermore, a lifting support plate is fixedly connected to the top of the stabilizing support frame, and the lifting support plate is located above the side guide frame, and the lifting support plate is parallel to the upper surface of the movable support platform.

[0012] Furthermore, a spiral push cylinder is installed on the lower surface of the lifting support platform through bolts, and the push rod of the spiral push cylinder is perpendicular to the end face of the lifting support platform away from the compression test support frame. The front end of the push rod of the spiral push cylinder is fixedly connected to a reset push block, and the reset push block is a triangular block, and the inclined surface of the reset push block faces obliquely downward.

[0013] Furthermore, a wedge-shaped support platform is fixedly connected to the inner bottom of the stable support, the inclined surface of the support platform faces obliquely upward, and the inclined surface of the support platform is slidably connected to the reset push block.

[0014] Furthermore, two braking springs are fixedly connected to the lower surface of the lifting support platform, and the lower ends of the braking springs are fixedly connected to the inner bottom surface of the stabilizing support frame.

[0015] The present invention provides a special hanger for a rectangular pipe jacking section experimental support frame, which has the following beneficial effects: The special hanger for rectangular jacking pipe sections in the present invention is used for the strength test experiment of rectangular jacking pipe sections. It is combined with the compression test support frame. The rectangular jacking pipe section unit hangers distributed in multiple directions are used to support the pipe sections at multiple nodes, thereby improving the suspension stability of the rectangular jacking pipe sections. The height of the pipe section can be adjusted by cooperating with the directional lifting mechanism and the lifting hanger, so that the pipe section is at a suitable height for the connection and installation of the pull plate and the steel cable. The guiding effect of the hanger connecting beam and the directional guide rod can avoid the shaking of the lifting support platform and the movable support platform. The lifting support platform and the movable support platform cooperate to support the pipe section, thereby reducing the shaking of the pipe section in the suspended state, and further improving the stability of the support frame during the test.

[0016] In addition, the pipe section is supported from multiple points by multiple sets of lifting supports and movable supports. During the pressure strength test, if the pipe section is partially broken under the action of pressure, the broken part can be supported by the supporting structure composed of the lifting supports and movable supports below it to prevent it from falling. The remaining parts of the pipe section are also supported by the supporting structure composed of multiple sets of lifting supports and movable supports to prevent the pipe section from breaking and losing balance and falling, thereby avoiding damage to the test site and test equipment and causing safety accidents.

[0017] In addition, through the cooperation of the spiral push cylinder and the stable support, under normal conditions, the spiral push cylinder is in an extended state, the reset push block is separated from the support wedge, and the stable support is pushed upward under the tension of the brake spring. When the pipe section is suspended by the lifting support and the movable support, the lower surface of the pipe section fits with the upper surface of the lifting support plate, and the stable support is lowered under the action of gravity to apply downward pressure. At the same time, the lower surface of the pipe section is connected with the horizontal support tube in a rolling manner. At this time, the friction of the pipe section above the movable support is increased through the fit of the support wedge and the pipe section, so that the pipe section is stably placed above the movable support. In this state, the pipe joint is placed firmly, and the steel cable and the pull plate can be operated. During the compressive strength test, the spiral push cylinder is controlled to push the reset push block outward. Under the push action of the reset push block and the inclined surface of the support wedge, the stable support is moved downward, and the support wedge is separated from the lower surface of the pipe joint, so that the pipe joint is connected to the horizontal support tube in a rolling manner. At the same time, the front and rear support tubes are connected to the limiting wheel rail in a rolling manner, so that the pipe joint is firmly supported in the vertical direction and flexibly floats in the horizontal direction. It can be fine-tuned as the test experiment pulls and deforms the pipe joint to reduce the influence of friction on the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0019] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached figure: Figure 1 A schematic diagram showing the overall structure of the pipe segment strength test in this application is shown; Figure 2 Shows a schematic diagram of the top structure of the present application; Figure 3 Shows a front structural schematic diagram of the present application; Figure 4 It shows the structural schematic diagram of the pipe section removal of this application; Figure 5 Shows a schematic structural diagram of a single group of spreaders in this application; Figure 6 Shows this application Figure 5 Schematic diagram of the rear structure; Figure 7 It shows a schematic diagram of the structure of the lifting support platform and the movable support platform when they are separated; Figure 8 Shows this application Figure 7 A schematic diagram of the structure from the bottom perspective; Figure 9 It shows a schematic diagram of the structure of the reset push block and the support wedge when the present application cooperates; Figure 10It shows a structural schematic diagram of the present application when the stabilizing support frame is in the downward moving state.

[0021] Reference numerals: 1. Compression test support frame; 101. Steel cable pull plate; 2. Directional connecting frame; 201. Directional guide rod; 3. Directional lifting mechanism; 4. Lifting hanger; 5. Hanger connecting beam; 6. Lifting support platform; 601. Support platform guide; 602. Side limit flange; 603. Limit wheel rail; 604. Side guide frame; 605. Braking spring; 7. Movable support platform; 701. Support platform limit side edge; 702. Horizontal support tube; 703. Front and rear support tube; 8. Screw push cylinder; 801. Reset push block; 9. Stabilizing support frame; 901. Support frame wedge; 902. Lifting support plate. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 described 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.

[0023] Example 1: Please refer to Figures 1 to 10 : The present invention proposes a special hanger for a rectangular jacking pipe section test support frame, comprising: a compression test support frame 1, the compression test support frame 1 is connected to a steel cable pull plate 101 by a steel cable on the outside, four directional connecting frames 2 are fixedly connected to the top of the compression test support frame 1, a directional lifting mechanism 3 is fixedly connected to the middle of a side of the directional connecting frame 2 away from the center of the compression test support frame 1, a lifting hanger 4 is connected to the bottom of the directional lifting mechanism 3, and a hanger connecting beam 5 is connected to the bottom of the lifting hanger 4 by bolts, the directional connecting frame 2 is fixedly connected to a directional guide rod 201 on the outside, the directional guide rod 201 is perpendicular to the upper surface of the compression test support frame 1, the lower end of the directional guide rod 201 is fixedly connected to the support foot of the compression test support frame 1, a lifting support platform 6 is welded to each end of the hanger connecting beam 5, the rear of the lifting support platform 6 is movably connected to the directional guide rod 201, and a movable support is movably installed above the lifting support platform 6. 7. The upper surface of the movable support 7 is rotatably connected with a transverse support tube 702, and the axis of the transverse support tube 702 is perpendicular to the end face of the movable support 7 away from the compression test support frame 1; through the cooperation of the directional lifting mechanism 3 and the lifting hanger 4, the hanger connecting beam 5 and the lifting support 6 are lifted, and the height of the rectangular top pipe section located above the movable support 7 can be adjusted to realize the suspension of the pipe section to adapt to the compression test support frame 1 passing through and surrounding the steel cable. Through this form of sling, the rectangular top pipe section is prevented from shaking violently due to external force during the suspension process. If the pipe section is partially broken under the action of pressure, the broken part can be supported by the supporting structure composed of the lifting support 6 and the movable support 7 below it to avoid falling. The remaining parts of the pipe sections are also supported by the supporting structure composed of multiple groups of lifting supports 6 and the movable support 7 to avoid the pipe sections from breaking and losing balance and falling, thereby avoiding damage to the test site and test equipment.

[0024] In the embodiment of the present disclosure, one end of the lifting support platform 6 close to the center of the compression test support frame 1 is provided with a support guide port 601 which is slidably connected to the directional guide rod 201. The lifting support platform 6 is parallel to the upper surface of the compression test support frame 1 and plays a guiding role to prevent the lifting support platform 6 from being affected by external forces and causing the movable support platform 7 to shake, so that the lifting support platform 6 can drive the movable support platform 7 and the pipe section to move vertically up and down under the cooperation of the directional lifting mechanism 3 and the lifting hanger 4.

[0025] In the embodiment of the present disclosure, side limiting flanges 602 are provided on the upper edges of both side surfaces of the lifting support platform 6, and the two side surfaces of the movable support platform 7 are fixedly connected with support platform limiting side edges 701. The side limiting flanges 602 are slidably connected inside the support platform limiting side edges 701 to play a guiding role, while preventing the lifting support platform 6 and the movable support platform 7 from being separated and disassembled due to external forces.

[0026] In the embodiment of the present disclosure, a limiting wheel rail 603 is provided on the upper surface of the lifting support platform 6, and the lower surface of the movable support platform 7 is rotatably connected with front and rear support cylinders 703. The axes of the front and rear support cylinders 703 are parallel to the sides of the movable support platform 7. The front and rear support cylinders 703 are rollingly connected inside the limiting wheel rail 603, playing a guiding role, so that the movable support platform 7 can move more flexibly above the lifting support platform 6, so that the orientation of the pipe section will not be locked above the supporting structure due to its own gravity, thereby reducing the impact of friction on the detection accuracy during the test.

[0027] Embodiment 2, on the basis of embodiment 1, the two sides of the lifting support platform 6 are respectively fixedly connected with a side guide frame 604, and a rectangular guide opening is longitudinally opened inside the side guide frame 604. A stable support frame 9 is provided below the lifting support platform 6, and the stable support frame 9 is in a "U"-shaped structure. The connecting plates on both sides of the stable support frame 9 are slidably connected to the internal guide openings of the side guide frames 604 on both sides, and the top of the stable support frame 9 is fixedly connected with a lifting support plate 902, which is located above the side guide frame 604. The lifting support plate 902 is parallel to the upper surface of the movable support platform 7, and the lower surface of the lifting support platform 6 is installed with a screw push rod by bolts. Cylinder 8, the push rod of the spiral push cylinder 8 is perpendicular to the end face of the lifting support platform 6 away from the compression test support frame 1, and the front end of the push rod of the spiral push cylinder 8 is fixedly connected with a reset push block 801, and the reset push block 801 is a triangular block, and the inclined surface of the reset push block 801 faces obliquely downward. The inner bottom of the stable support frame 9 is fixedly connected with a wedge-shaped support wedge platform 901, and the inclined surface of the support wedge platform 901 faces obliquely upward. The inclined surface of the support wedge platform 901 is slidably connected to the reset push block 801, and the lower surface of the lifting support platform 6 is fixedly connected with two brake tension springs 605, and the lower end of the brake tension spring 605 is fixedly connected to the inner bottom of the stable support frame 9. Through the cooperation of the spiral push cylinder 8 and the stable support 9, under normal conditions, the spiral push cylinder 8 is in an extended state, the reset push block 801 is separated from the support wedge 901, and the stable support 9 is pushed upward under the tension of the brake spring 605. When the pipe section is suspended by the lifting support 6 and the movable support 7, the lower surface of the pipe section fits with the upper surface of the lifting support plate 902, and the stable support 9 is pressed downward under the action of gravity. At the same time, the lower surface of the pipe section is rolledly connected with the horizontal support tube 702. At this time, the support wedge 901 is fitted with the pipe section, increasing the friction force of the pipe section above the movable support 7, so that the pipe section is stably placed above the movable support 7. In this state, the pipe section is placed firmly, and the connection between the steel cable and the pull plate can be operated. During the compressive strength test experiment, the spiral push cylinder 8 is controlled to push the reset push block 801 outward. Under the inclined pushing action of the reset push block 801 and the support wedge 901, the stable support frame 9 is moved downward, and the support wedge 901 is separated from the lower surface of the pipe section, so that the pipe section is rollingly connected to the horizontal support tube 702, and the front and rear support tubes 703 are rollingly connected to the limiting wheel rail 603, so that the pipe section is firmly supported in the vertical direction and flexibly floats in the horizontal direction. It can be fine-tuned as the test experiment pulls and deforms the pipe section to reduce the influence of friction on the test results.

[0028] The working principle of this embodiment is as follows: first, the rectangular jacking pipe section is lifted to the top of the compression test support frame 1 by an external lifting device, and then the pipe section is lowered smoothly so that the pipe section is firmly supported by the supporting structure composed of multiple groups of lifting supports 6 and movable supports 7 on the periphery of the compression test support frame 1. At this time, the support wedge 901 is squeezed downward under the dead weight of the pipe section, so that the brake tension spring 605 is stretched, and the lower surface of the pipe section is rolledly connected with the transverse support tube 702, and is tightly fitted with the support wedge 901. The friction between the support wedge 901 and the lower surface of the pipe section is used to firmly place the pipe section above the supporting structure. By controlling the height of the lifting hanger 4 to adjust the height of the jacking pipe section, the overall height of the jacking pipe section can be adjusted, and the steel cable pull plate 101 is connected to the compression test support frame 1 by a steel cable so that the steel cable pull plate 101 is tightly fitted with the outer surface of the pipe section, and the steel cable is connected to the tensile machine. After the steel cable pull plate 101 is laid out, the spiral push cylinder 8 is controlled to reset the push block 801 outward Pushing up, under the pushing action of the reset push block 801 and the inclined surface of the support wedge 901, the stable support frame 9 moves down, the support wedge 901 is separated from the lower surface of the pipe section, and the pipe section is rolled connected with the horizontal support tube 702. At the same time, the front and rear support tubes 703 are rolled connected with the limiting wheel rail 603, so that the pipe section is firmly supported in the vertical direction while being flexibly moved in the front, back, left and right directions. The tensile machine is controlled to contract the steel cable connected to the steel cable pull plate 101, so that the steel cable pull plate 101 approaches the direction of the compression test support frame 1 and applies pressure. The pressure magnitude is recorded when the pipe section is deformed under the action of pressure. If the pipe section breaks or shatters during the test, the broken part is still supported by the supporting structure composed of the lifting support platform 6 and the movable support platform 7 below it to avoid falling, and also to avoid the pipe section losing balance and falling due to local loss of rupture, causing damage to the test site and test equipment; after the test is completed, the steel cable pull plate 101 is removed, and the rectangular top pipe section is lifted and transferred by the external lifting device.

[0029] In this article, there are several points to note: 1. The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0030] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0031] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A special lifting device for a rectangular pipe jacking section experimental support frame, comprising: A compression test support frame (1), wherein the compression test support frame (1) is connected to a steel cable pull plate (101) on the outside through a steel cable, and is characterized in that four directional connecting frames (2) are fixedly connected above the compression test support frame (1), a directional lifting mechanism (3) is fixedly connected to the middle of a side of the directional connecting frame (2) away from the center of the compression test support frame (1), a lifting hanger (4) is connected below the directional lifting mechanism (3), the bottom of the lifting hanger (4) is connected to a hanger connecting beam (5) by bolts, and the directional connecting frame (2) is fixedly connected to a directional guide rod (201 ), the directional guide rod (201) is perpendicular to the upper surface of the compression test support frame (1), the lower end of the directional guide rod (201) is fixedly connected to the support leg of the compression test support frame (1), and a lifting support platform (6) is welded to each end of the hanger connecting beam (5), the rear of the lifting support platform (6) is movably connected to the directional guide rod (201), and a movable support platform (7) is movably installed above the lifting support platform (6), and the upper surface of the movable support platform (7) is rotatably connected to a transverse support tube (702), and the axis of the transverse support tube (702) is perpendicular to the end surface of the movable support platform (7) away from the compression test support frame (1).

2. A special hanger for a rectangular pipe jacking section experimental support frame according to claim 1, characterized in that: One end of the lifting support platform (6) close to the center of the compression test support frame (1) is provided with a support platform guide opening (601) slidably connected to the directional guide rod (201), and the lifting support platform (6) is parallel to the upper surface of the compression test support frame (1).

3. The special lifting device for rectangular pipe jacking section test support frame according to claim 1 is characterized in that: The upper edges of both side surfaces of the lifting support platform (6) are provided with side limiting flanges (602), and the two side surfaces of the movable support platform (7) are fixedly connected with support platform limiting side edges (701), and the side limiting flanges (602) are slidably connected inside the support platform limiting side edges (701).

4. A special hanger for a rectangular pipe jacking section experimental support frame according to claim 3, characterized in that: The upper surface of the lifting support platform (6) is provided with a limiting wheel track (603), and the lower surface of the movable support platform (7) is rotatably connected to the front and rear support cylinders (703), the axes of the front and rear support cylinders (703) are parallel to the side surfaces of the movable support platform (7), and the front and rear support cylinders (703) are rollingly connected inside the limiting wheel track (603).

5. The special lifting device for rectangular pipe jacking section test support frame according to claim 1 is characterized in that: A side guide frame (604) is fixedly connected to each of the two sides of the lifting support platform (6), and a rectangular guide opening is longitudinally provided inside the side guide frame (604).

6. A special hanger for a rectangular pipe jacking section experimental support frame according to claim 5, characterized in that: A stabilizing support frame (9) is provided below the lifting support platform (6). The stabilizing support frame (9) is in a "U"-shaped structure. The connecting plates on both sides of the stabilizing support frame (9) are slidably connected to the internal guide openings of the side guide frames (604) on both sides.

7. A special lifting device for a rectangular pipe jacking section experimental support frame according to claim 6, characterized in that: The top of the stable support frame (9) is fixedly connected to a lifting support plate (902), the lifting support plate (902) is located above the side guide frame (604), and the lifting support plate (902) is parallel to the upper surface of the movable support platform (7).

8. The special lifting device for rectangular pipe jacking section test support frame according to claim 6, characterized in that: A spiral push cylinder (8) is mounted on the lower surface of the lifting support platform (6) via bolts. The push rod of the spiral push cylinder (8) is perpendicular to the end surface of the lifting support platform (6) away from the compression test support frame (1). The front end of the push rod of the spiral push cylinder (8) is fixedly connected to a reset push block (801). The reset push block (801) is a triangular block, and the inclined surface of the reset push block (801) faces obliquely downward.

9. The special lifting device for rectangular pipe jacking section test support frame according to claim 8, characterized in that: The inner bottom of the stable support frame (9) is fixedly connected to a support frame wedge platform (901) with a wedge structure, the inclined surface of the support frame wedge platform (901) faces obliquely upward, and the inclined surface of the support frame wedge platform (901) is slidably connected to the reset push block (801).

10. A special lifting device for a rectangular pipe jacking section experimental support frame according to claim 9, characterized in that: Two braking springs (605) are fixedly connected to the lower surface of the lifting support platform (6), and the lower ends of the braking springs (605) are fixedly connected to the inner bottom surface of the stabilizing support frame (9).

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