Walking type jack adaptive to differential pushing deformation of curved bridge

Abstract

This utility model discloses a walking-type jack adapted to the deformation of a curved bridge during differential jacking, comprising a base, a longitudinal slide box, a transverse slide box, a vertical jack, and a one-way movable plate rubber bearing. The longitudinal slide box is placed on a track on the base, the transverse slide box is placed within the space of the longitudinal slide box and can only move laterally, and the vertical jack is placed within the space of the transverse slide box and can rotate freely, adapting to the rotation of the bridge during differential jacking. The one-way movable plate rubber bearing is placed on the vertical jack and located under the bridge being jacked. When subjected to force, the one-way movable plate rubber bearing undergoes transverse shear deformation, adapting to the lateral displacement during differential jacking. This utility model can adapt to the rotation and lateral displacement of the beam during differential jacking, enabling the differential jacking of curved bridges to reach an ideal state where theoretically almost no correction is needed.

Description

Technical Field

[0001] This utility model relates to a jack, and more particularly to a walking jack that adapts to the differential pushing deformation of a curved bridge. Background Technology

[0002] The incremental launching method is widely used in the construction of continuous beam bridges with uniform cross-sections, including single-point launching and multi-point launching. In recent years, the multi-point launching method using walking jacks has been widely adopted. This method does not affect traffic or navigation under the bridge and can be well applied to the launching construction of straight bridges. For the launching construction of curved beam bridges, the traditional launching process involves first launching the beam along the tangent of the circular curve. When the deviation between the beam and the designed trajectory reaches a limit, the horizontal jacks are adjusted to correct the deviation. This requires simultaneous launching and correction, which is quite difficult. The steel box girder of the Lotus Bridge at Hengqin Port (curve radius 55m) was the first to adopt differential jacking technology. During the jacking process of the curve, the differential jacking control system ensured that the inner and outer jacks had the same angular velocity but different linear velocity, resulting in a difference in jacking stroke between the two sides. However, the jacking construction of this project still required frequent lateral correction, with a lateral correction operation required every three jacking strokes. The reason for this was that although the project adopted a new oil pump system to ensure that the inner and outer jacks had the same angular velocity and that the jacks on the inner and outer sides of the curved bridge had a different stroke, the adaptability of the jacks to the deformation of the bridge during differential jacking was not taken into account. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a walking jack with a simple structure and reliable operation that adapts to the differential pushing deformation of curved bridges.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is: a walking jack adaptable to the deformation of a curved bridge during differential jacking, comprising a base, a longitudinal slide box, a transverse slide box, a vertical jack, and a one-way movable plate rubber support; the longitudinal slide box is placed on the slide rail of the base, the transverse slide box is placed in the space of the longitudinal slide box and can only move laterally, the vertical jack is placed in the space of the transverse slide box and can rotate freely, adapting to the rotation of the bridge during differential jacking; the one-way movable plate rubber support is placed on the vertical jack and located under the bridge being jacked, and the one-way movable plate rubber support undergoes transverse shear deformation when subjected to force, adapting to the transverse displacement during differential jacking.

[0005] The aforementioned walking jack adaptable to the differential pushing deformation of curved bridges includes a base plate, a slide rail, a limiting strip, an end plate, a jack fixing block, and a jack; two limiting strips are symmetrically arranged on both sides of the slide rail, and the space between the two limiting strips forms a slide rail. An end plate is provided on one side of the slide rail and is welded to the base plate. A jack fixing block is fixed on the side of the end plate away from the slide rail. The jack fixing block has an opening in the middle, and a jack is installed in the opening.

[0006] The aforementioned walking jack adaptable to the differential pushing deformation of curved bridges includes a longitudinal sliding box comprising a longitudinal sliding box frame, a longitudinal sliding box space, longitudinal sliding box ear plates, a correction jack fixing block, and a correction jack. The longitudinal sliding box frame is a rectangular box structure with an open top, and the length of the longitudinal sliding box frame is the same as the distance between the two limiting strips on the base. A longitudinal sliding box ear plate is fixedly provided at the middle position of the long side of the longitudinal sliding box frame near the end plate. There are two longitudinal sliding box ear plates, which are arranged in parallel. There is a round hole in the middle of the longitudinal sliding box ear plate. The longitudinal sliding box frame is connected to the pushing jack through the longitudinal sliding box ear plates. The internal space of the longitudinal sliding box frame is the longitudinal sliding box space. A correction jack fixing block is welded at the middle position of the short side of one side of the longitudinal sliding box frame, and a correction jack is provided at the middle position of the correction jack fixing block.

[0007] The aforementioned walking jack adaptable to the differential pushing deformation of curved bridges includes a transverse sliding box comprising a transverse sliding box frame, a transverse sliding box space, and transverse sliding box ear plates. The transverse sliding box frame is a regular square prism, with the side length of the transverse sliding box frame being the same as the short side of the longitudinal sliding box space. The cylindrical space formed by the opening at the top of the transverse sliding box frame serves as the transverse sliding box space. A transverse sliding box ear plate is fixedly provided at the middle position on the side of the transverse sliding box frame near the correction jack. There are two transverse sliding box ear plates arranged in parallel, with a hole in the middle of each ear plate. The transverse sliding box frame is connected to the correction jack through the transverse sliding box ear plates.

[0008] The aforementioned walking-type jack adapted to the differential pushing deformation of curved bridges includes a vertical jack housing and a vertical jack piston. The vertical jack housing is cylindrical, and its diameter is the same as the inner diameter of the transverse sliding box space. The vertical jack piston is also cylindrical and is installed inside the vertical jack housing to adjust the vertical height of the bridge being pushed.

[0009] The aforementioned walking jack adaptable to the differential pushing deformation of curved bridges includes a unidirectional movable plate rubber bearing comprising a steel basin, a plate rubber bearing, and a trough-shaped cover plate. The plate rubber bearing is a cuboid located between the steel basin and the trough-shaped cover plate. The steel basin includes a bottom plate, transverse side plates, and longitudinal side plates. Two parallel transverse side plates are symmetrically arranged on the left and right sides of the bottom plate, and two parallel longitudinal side plates are symmetrically arranged on the front and rear sides. The bottom plate, the two transverse side plates, and the two longitudinal side plates form a box structure with an open top. The trough-shaped cover plate includes a top plate and side plates symmetrically arranged on both sides of the top plate. The top surface of the plate rubber bearing is bonded to the bottom surface of the top plate, and the bottom surface of the plate rubber bearing is bonded to the bottom plate of the steel basin. A drainage hole is provided at each of the four corners of the bottom plate of the steel basin. When the top surface of the plate rubber bearing is subjected to a horizontal force, a transverse shear deformation Δ occurs.

[0010] The aforementioned walking jack, adapted to the differential pushing deformation of curved bridges, has a plate rubber bearing with a transverse width equal to that of the top plate of the trough cover, and a longitudinal width slightly narrower than that of the top plate of the trough cover. This ensures that after the plate rubber bearing undergoes lateral deformation under vertical load, the side of the plate rubber bearing does not contact the side plate of the trough cover, thus not affecting the transverse shear deformation of the plate rubber bearing.

[0011] The walking jack described above, which is adapted to the differential pushing deformation of curved bridges, has a plate rubber bearing that is higher than the side plate of the trough cover plate. This ensures that after the plate rubber bearing undergoes vertical deformation under vertical load, the side plate of the trough cover plate does not contact the bottom plate of the steel basin.

[0012] The walking jack adapted to the differential pushing deformation of the curved bridge has the same longitudinal width of the top surface of the steel basin bottom plate as the top surface of the trough cover plate, and the transverse width of the top surface of the steel basin bottom plate is 2[Δ] wider than the transverse width of the top surface of the trough cover plate. [Δ] is greater than the transverse shear deformation Δ.

[0013] The aforementioned walking jack, adapted to the deformation of the curved bridge by differential jacking, has the inner surface of the transverse side plate of the steel basin in direct contact with the outer surface of the side plate of the trough cover plate. Both contact surfaces are polished to prevent longitudinal displacement between the trough cover plate and the steel basin, thus not affecting the longitudinal jacking distance, but allowing for the generation of the maximum [Δ] displacement in the transverse direction, adapting to the transverse displacement of the beam during the differential jacking process.

[0014] The beneficial effects of this utility model are as follows: This utility model can adapt to the rotation and lateral displacement of the beam during the differential jacking process, so that the differential jacking of the curved bridge can reach the ideal state in theory that almost no correction is needed. Furthermore, it can be considered to increase the length of the slide, increase the longitudinal distance of each jacking, reduce the number of jackings, and further improve the construction efficiency of the curved bridge jacking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the differential jacking of the curved bridge according to this utility model.

[0016] Figure 2 This is a three-dimensional drawing of the present invention.

[0017] Figure 3 This is a top view of the present invention.

[0018] Figure 4 This is a side view of the present invention.

[0019] Figure 5 This is a three-dimensional exploded view of the present invention.

[0020] Figure 6 This is a structural diagram of the base.

[0021] Figure 7 This is a schematic diagram of the longitudinal sliding box.

[0022] Figure 8 This is a schematic diagram of the transverse sliding box.

[0023] Figure 9 This is a schematic diagram of the vertical jack.

[0024] Figure 10 This is a three-dimensional exploded view of a unidirectional movable plate rubber bearing.

[0025] Figure 11 This is a schematic diagram of the cross-section of a unidirectional movable plate rubber bearing.

[0026] Figure 12 This is a top view of a unidirectional movable plate rubber bearing.

[0027] Figure 13 This is a front view of a unidirectional movable plate rubber bearing.

[0028] Figure 14 This is a side view of a unidirectional movable plate rubber bearing.

[0029] Figure 15 This is a structural diagram of a steel basin.

[0030] Figure 16 This is a schematic diagram of the lateral shear deformation of a plate rubber bearing.

[0031] Figure 17 This is a structural schematic diagram of a grooved cover plate.

[0032] Figure 18 This is a front view of a unidirectional movable plate rubber bearing with a cross section.

[0033] Figure 19 This is a side view of a unidirectional movable plate rubber bearing with a cross section.

[0034] Figure 20 This is a schematic diagram illustrating how the present invention adapts to lateral displacement. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] like Figure 1In the diagram, O represents the center of the curved bridge, and R1 and R2 represent the radii of the arcs at the positions of the inner and outer jacks, respectively. The differential speed ratio between the inner and outer jacks is R1:R2. The inner and outer jacks are placed at points n1 and n2, respectively, and pushed to points n3 and n4. The walking jacks can only move in a straight line; the pushing path is not along the arcs S1 and S2. Assuming the jack at n1 pushes along the secant line L1, and L2 is the outer arc secant line parallel to L1, the outer jack does not push along L2 because the initial distance between the inner and outer jacks is B, and this distance remains constant during the pushing process. When the inner jack reaches point n... i At point n, the outer jack is at n. j Point position, n j The point is located on line L4 and intersects with n i At the intersection of circles with center O and radius B, line L4 is the distance from point O to point n. i Connecting the points, at this point, it can be guaranteed that n i Point to n j The distance between the points is B, and the distances traveled by the inner and outer jacks also satisfy the differential speed ratio, determined by each n. j The polyline formed by connecting points is denoted as L3, which is a curve. Because the jacking jacks can only push along a straight line, the outer jacks can only be arranged along the secant line L2. At this time, the lateral distance Δ between L2 and L3 cannot be accommodated by traditional walking jacks. At the same time, the beam will rotate significantly during the jacking process, such as... Figure 1 The angle θ in the middle is limited by the traditional walking jack, which means that even when using the inner and outer arc differential speed ratio for jacking, a lot of correction is required. Therefore, how to adapt to the rotation and lateral displacement of the beam during the differential jacking process, so that the differential jacking of the curved bridge can reach a state where theoretically almost no correction is required, requires improvement of the traditional walking jack equipment based on the above deformation theory analysis.

[0037] like Figures 2-5As shown, a walking jack adaptable to the differential pushing deformation of a curved bridge includes a base 1, a longitudinal slide box 2, a transverse slide box 3, a vertical jack 4, and a one-way movable plate-type rubber support 5. The longitudinal slide box 2 is placed on the slide rail 12 of the base 1, and the transverse slide box 3 is placed within the longitudinal slide box space 22 and can only move laterally. The transverse slide box 3 has a square plane with a side length the same as the width of the longitudinal slide box space 22, ensuring that the transverse slide box 3 can only move laterally. The vertical jack 4 is a cylinder. The vertical jack 4 is placed in the horizontal sliding box space 32, which is also a cylinder with the same diameter as the vertical jack 4. This ensures that the vertical jack 4 cannot produce translational displacement, but can rotate freely to adapt to the rotation of the bridge during differential jacking. The unidirectional movable plate rubber bearing 5 is placed on the vertical jack 4 and located under the jacking bridge. When the unidirectional movable plate rubber bearing 5 is subjected to force, it produces lateral shear deformation to adapt to the lateral displacement during differential jacking, but will not produce longitudinal displacement and will not affect the longitudinal jacking distance.

[0038] like Figure 6 As shown, the base 1 includes a base plate 11, a slide rail 12, a limiting strip 13, an end plate 14, a jack fixing block 15, and a jack 16. Two limiting strips 13 are symmetrically arranged on both sides of the slide plate, and the space between the two limiting strips 13 forms the slide rail 12. The slide rail 12 is made of smooth stainless steel plate or polytetrafluoroethylene plate to minimize the coefficient of friction and reduce the jacking force. An end plate 14 is provided on one side of the slide rail 12. The end plate 14 is welded to the base plate 11. A jack fixing block 15 is fixed on the side of the end plate 14 away from the slide rail 12. The jack fixing block 15 has an opening in the middle, and a jack 16 is installed in the opening.

[0039] like Figure 7 As shown, the longitudinal sliding box 2 includes a longitudinal sliding box frame 21, a longitudinal sliding box space 22, a longitudinal sliding box ear plate 23, a correction jack fixing block 24, and a correction jack 25. The longitudinal sliding box frame 21 is a rectangular box structure with an opening at the top. The length of the longitudinal sliding box frame 21 is the same as the distance between the two limiting strips 13 on the base 1, ensuring that the longitudinal sliding box frame 21 does not produce lateral displacement, but produces longitudinal displacement under the action of the jacking jack 16 to push the bridge. The longitudinal sliding box frame 21 is close to the end plate 1. A longitudinal sliding box ear plate 23 is fixedly provided at the middle position of the long side of one side. There are two longitudinal sliding box ear plates 23, which are arranged in parallel. There is a round hole in the middle of the longitudinal sliding box ear plate 23. The longitudinal sliding box frame 21 is connected to the jacking jack 16 through the longitudinal sliding box ear plate 23. The internal space of the longitudinal sliding box frame 21 is the longitudinal sliding box space 22. A correction jack fixing block 24 is welded at the middle position of the short side of one side of the longitudinal sliding box frame 21. A hole is opened in the middle position of the correction jack fixing block 24 for fixing the correction jack 25.

[0040] like Figure 8As shown, the transverse sliding box 3 includes a transverse sliding box frame 31, a transverse sliding box space 32, and transverse sliding box ear plates 33. The transverse sliding box frame 31 is a regular square prism, and the side length of the transverse sliding box frame 31 is the same as the short side of the longitudinal sliding box space 22, ensuring that the transverse sliding box 2 does not produce longitudinal displacement, but produces transverse displacement under the action of the correction jack 25 to correct the bridge. The cylindrical space formed by the opening at the top of the transverse sliding box frame 31 serves as the transverse sliding box space 32. A transverse sliding box ear plate 33 is fixedly provided at the middle position on the side of the transverse sliding box frame 31 near the correction jack 25. There are two transverse sliding box ear plates 33, which are arranged in parallel. There is a hole in the middle of the transverse sliding box ear plate 33. The transverse sliding box frame 31 is connected to the correction jack 25 through the transverse sliding box ear plates 33.

[0041] like Figure 9 As shown, the vertical jack 4 includes a vertical jack housing 41 and a vertical jack piston 42. The vertical jack housing 41 is a cylinder, and its diameter is the same as the inner diameter of the transverse sliding box space 32, ensuring that the vertical jack 4 does not translate but only rotates freely, adapting to the bridge rotation during differential jacking. The vertical jack piston 42 is also a cylinder, but its diameter is smaller than that of the vertical jack housing 41. The vertical jack piston 42 is installed inside the vertical jack housing 41 to adjust the vertical height of the jacking bridge.

[0042] like Figures 10-19 As shown, the unidirectional movable plate rubber bearing 5 includes a steel basin 51, a plate rubber bearing 52, and a grooved cover plate 53; the plate rubber bearing 52 is a cuboid and is located between the steel basin 51 and the grooved cover plate 53; the steel basin 51 includes a steel basin bottom plate 511, steel basin transverse side plates 512, and steel basin longitudinal side plates 513. Two parallel steel basin transverse side plates 512 are symmetrically arranged on the left and right sides of the steel basin bottom plate 511, and two parallel steel basin longitudinal side plates 513 are symmetrically arranged on the front and rear sides of the steel basin bottom plate 511. The steel basin base plate 511, two steel basin transverse side plates 512, and two steel basin longitudinal side plates 513 constitute a box structure with an upper opening; the trough-shaped cover plate 53 includes a top plate 531 and side plates 532 symmetrically arranged on both sides of the top plate 531; the top surface of the plate rubber support 52 is bonded to the bottom surface of the top plate 531, and the bottom surface of the plate rubber support 52 is bonded to the steel basin base plate 511; a drain hole 514 is provided at each of the four corners of the steel basin base plate 511; when the top surface of the plate rubber support 52 is subjected to horizontal force, it generates transverse shear deformation Δ.

[0043] The transverse width of the plate rubber bearing 52 is the same as that of the top plate 531 of the trough cover plate 53. The longitudinal width of the plate rubber bearing 52 is slightly narrower than that of the top plate 531 of the trough cover plate 53. This ensures that after the plate rubber bearing 52 undergoes lateral deformation under vertical load, the side of the plate rubber bearing 52 does not contact the side plate 532 of the trough cover plate 53, and does not affect the transverse shear deformation of the plate rubber bearing 52.

[0044] The height of the plate rubber bearing 52 is higher than the side plate 532 of the trough cover plate 53, ensuring that after the plate rubber bearing 52 undergoes vertical deformation under vertical load, the side plate 532 of the trough cover plate 53 does not contact the steel basin bottom plate 511.

[0045] The longitudinal width of the top surface of the steel basin bottom plate 511 is the same as the longitudinal width of the top surface of the top plate 531 of the trough cover plate 53. The transverse width of the top surface of the steel basin bottom plate 511 is 2[Δ] wider than the transverse width of the top surface of the top plate 531 of the trough cover plate 53. [Δ] is greater than the transverse shear deformation Δ.

[0046] The inner surface of the transverse side plate 512 of the steel basin is in direct contact with the outer surface of the side plate 532 of the trough cover plate 53. The two contact surfaces are polished and coated with a small amount of lubricating oil so that there is no longitudinal displacement between the trough cover plate 53 and the steel basin 51, which does not affect the longitudinal jacking distance, but can generate the maximum [Δ] displacement in the transverse direction, which can adapt to the transverse displacement of the beam during the differential jacking process.

[0047] like Figure 1 , 16 As shown in Figure 20, when one side of the jack of the bridge 6 is subjected to a lateral force F during the jacking process, the unidirectional movable plate rubber bearing 5 generates a lateral shear deformation Δ. The lateral shear deformation Δ is linearly related to the force F. In one jacking stroke, at the beginning of the jacking (e.g. Figure 1 The jack is located at point n2), Δ = 0, the force F = 0, Δ is not zero during the jacking process, Δ is maximum when the jacking stroke is halfway through, and Δ is maximum when the jacking stroke is reached (e.g., when the jacking stroke is at its maximum). Figure 1 (The middle jack is located at point n4), F = 0, Δ returns to 0. Therefore, during the differential jacking process, the shear deformation of the unidirectional movable plate rubber support 5 can achieve an adaptive effect. Combined with the adaptive rotation angle of the vertical jack 4, the differential jacking of the curved bridge can reach the ideal state where theoretically almost no correction is needed.

Claims

1. A walking jack adapted to differential pushing deformation of a curved bridge, characterized in that: The system includes a base, a longitudinal sliding box, a transverse sliding box, a vertical jack, and a one-way movable plate rubber bearing. The longitudinal sliding box is placed on the slide rail of the base, the transverse sliding box is placed in the space of the longitudinal sliding box and can only move laterally, and the vertical jack is placed in the space of the transverse sliding box and can rotate freely to adapt to the rotation of the bridge during differential jacking. The one-way movable plate rubber bearing is placed on the vertical jack and located under the bridge being jacked. When the one-way movable plate rubber bearing is subjected to force, it generates transverse shear deformation to adapt to the transverse displacement during differential jacking.

2. The step jack that adapts to the differential pushing deformation of a curved bridge according to claim 1, characterized in that: The base includes a base plate, a slide rail, a limiting strip, an end plate, a jack fixing block, and a jack; two limiting strips are symmetrically arranged on both sides of the slide rail, and the space between the two limiting strips forms a slide rail. An end plate is provided on one side of the slide rail and is welded to the base plate. A jack fixing block is fixed on the side of the end plate away from the slide rail. The jack fixing block has a hole in the middle and a jack is installed in the hole.

3. The step jack that adapts to the differential pushing deformation of a curved bridge according to claim 2, characterized in that: The longitudinal slide box includes a longitudinal slide box frame, a longitudinal slide box space, a longitudinal slide box ear plate, a jack fixing block, and a jack. The longitudinal slide box frame is a rectangular box structure with an opening at the top. The length of the longitudinal slide box frame is the same as the distance between the two limiting strips on the base. A longitudinal slide box ear plate is fixedly installed at the middle position of the long side of the longitudinal slide box frame near the end plate. There are two longitudinal slide box ear plates, which are arranged in parallel. There is a round hole in the middle of the longitudinal slide box ear plate. The longitudinal slide box frame is connected to the jack through the longitudinal slide box ear plate. The internal space of the longitudinal slide box frame is the longitudinal slide box space. A jack fixing block is welded at the middle position of the short side of one side of the longitudinal slide box frame. A jack is installed at the middle position of the jack fixing block.

4. The step jack according to claim 3, wherein: The transverse sliding box includes a transverse sliding box frame, a transverse sliding box space, and transverse sliding box ear plates. The transverse sliding box frame is a regular square prism, and the side length of the transverse sliding box frame is the same as the short side of the longitudinal sliding box space. The cylindrical space formed by the opening at the top of the transverse sliding box frame serves as the transverse sliding box space. A transverse sliding box ear plate is fixedly installed at the middle position on the side of the transverse sliding box frame near the straightening jack. There are two transverse sliding box ear plates, which are arranged in parallel. There is a hole in the middle of the transverse sliding box ear plates. The transverse sliding box frame is connected to the straightening jack through the transverse sliding box ear plates.

5. The step jack that adapts to the differential pushing deformation of a curved bridge according to claim 4, characterized in that: The vertical jack includes a vertical jack housing and a vertical jack piston. The vertical jack housing is cylindrical, and its diameter is the same as the inner diameter of the horizontal sliding box space. The vertical jack piston is also cylindrical and is installed inside the vertical jack housing to adjust the vertical height of the jacking bridge.

6. The walking jack adaptable to the differential pushing deformation of a curved bridge according to claim 5, characterized in that: The unidirectional movable plate rubber bearing includes a steel basin, a plate rubber bearing, and a trough-shaped cover plate. The plate rubber bearing is a cuboid located between the steel basin and the trough-shaped cover plate. The steel basin includes a steel basin bottom plate, steel basin transverse side plates, and steel basin longitudinal side plates. Two parallel steel basin transverse side plates are symmetrically arranged on the left and right sides of the steel basin bottom plate, and two parallel steel basin longitudinal side plates are symmetrically arranged on the front and rear sides of the steel basin bottom plate. The steel basin bottom plate, the two steel basin transverse side plates, and the two steel basin longitudinal side plates constitute a box structure with an open top. The trough-shaped cover plate includes a top plate and side plates symmetrically arranged on both sides of the top plate. The top surface of the plate rubber bearing is bonded to the bottom surface of the top plate, and the bottom surface of the plate rubber bearing is bonded to the bottom plate of the steel basin. A drainage hole is provided at each of the four corners of the bottom plate of the steel basin. When the top surface of the plate rubber bearing is subjected to a horizontal force, a transverse shear deformation Δ is generated.

7. The walking jack adaptable to the differential pushing deformation of a curved bridge according to claim 6, characterized in that: The transverse width of the plate rubber bearing is the same as that of the top plate of the trough cover, and the longitudinal width of the plate rubber bearing is slightly narrower than that of the top plate of the trough cover. This ensures that after the plate rubber bearing undergoes lateral deformation under vertical load, the side of the plate rubber bearing does not contact the side plate of the trough cover, thus not affecting the transverse shear deformation of the plate rubber bearing.

8. The walking jack adaptable to the differential pushing deformation of a curved bridge according to claim 6, characterized in that: The height of the plate rubber bearing is higher than the side plate of the trough cover plate, ensuring that after the plate rubber bearing undergoes vertical deformation under vertical load, the side plate of the trough cover plate does not contact the bottom plate of the steel basin.

9. The walking jack adaptable to the differential pushing deformation of a curved bridge according to claim 6, characterized in that: The longitudinal width of the top surface of the steel basin bottom plate is the same as the longitudinal width of the top surface of the trough cover plate. The transverse width of the top surface of the steel basin bottom plate is 2[Δ] wider than the transverse width of the top surface of the trough cover plate. [Δ] is greater than the transverse shear deformation Δ.

10. The walking jack adaptable to the differential pushing deformation of a curved bridge according to claim 9, characterized in that: The inner surface of the transverse side plate of the steel basin is in direct contact with the outer surface of the side plate of the trough cover plate. Both contact surfaces are polished to prevent longitudinal displacement between the trough cover plate and the steel basin and to avoid affecting the longitudinal jacking distance. However, the transverse displacement can be maximized by [Δ] to accommodate the transverse displacement of the beam during differential jacking.

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