A device for dismantling a spherical hinge of a pier top swivel and a construction method thereof

Abstract

The application provides a device for dismantling a spherical hinge of a pier top swivel and a construction method thereof, which comprises a spherical hinge arranged between a pier column and a beam body, a vertical jacking mechanism and a spherical hinge dismantling mechanism. The vertical jacking mechanism is arranged between a bearing platform and the beam body and is used for jacking the beam body. The spherical hinge dismantling mechanism comprises a horizontal slide arranged on one side of the pier column and a counterforce frame arranged on the other side of the pier column. The counterforce frame is provided with a counterforce pushing member for pushing the spherical hinge into the horizontal slide. The device for dismantling the spherical hinge can move the spherical hinge horizontally, thereby accelerating the dismantling speed of the spherical hinge, saving the turnover material, shortening the construction period of the pier top continuous beam body closing, jacking the whole beam body through the vertical jacking mechanism, ensuring that the jacking is less than 1 cm and the stress state of the beam body basically does not change, establishing two mechanical structure models of the spherical hinge dismantling structure and the stress state of the beam body during jacking, and ensuring the stability and safety and shortening the construction period.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a device for removing a rotating ball hinge on a pier top and its construction method. Background Technology

[0002] With the rapid development of Chinese society, bridge construction technology is also advancing rapidly. Bridge construction inevitably involves crossing highways, railways, rivers, and other national engineering projects. Bridge rotation construction is a bridge-building technique that has emerged in recent years. This method utilizes readily available and simple supports to prefabricate two halves of the bridge. Then, using the bridge structure itself as a rotating body, and employing machinery, the two halves are rotated to their respective bridge locations and joined together to form the complete bridge. The advantage of this method—crossing existing obstacles without disrupting the surrounding environment—is greatly demonstrated. Recently, an increasing number of bridges crossing railways and highways have begun to use this method, as it does not affect normal railway or highway transportation, saves significant amounts of timber or steel for supports, and is safe, reliable, and reduces construction difficulty. The country is also paying more attention to rotation construction technology, and the key technology using ball joint rotation systems is relatively mature.

[0003] However, there is relatively little information on how to dismantle the rotating ball hinge after the pier top has been rotated. In the past, dismantling the ball hinge by erecting a dismantling platform was time-consuming and labor-intensive. The space between the bottom of the beam and the support at the ball hinge location was narrow, making it difficult for construction personnel and machinery to carry out the work. The dismantling of the ball hinge was also prone to collisions with existing structures, and the high-altitude dismantling operation was risky.

[0004] For example, Chinese invention patent CN103243657A, published on August 14, 2013, discloses a bridge pier top rotation structure, including a rotation drive device, a lifting device, supports, and a bridge pier. A rotation ball hinge is installed at the top of the pier, and a rotation steel casing is installed on the outer side of the upper ball hinge circumference. This ensures that the local bearing pressure at the bottom of the beam meets the stress requirements, increases the working space at the top of the pier, and improves safety. Furthermore, after rotation, the upper ball hinge and rotation steel casing structure also serve as a lateral anti-falling beam facility. This invention also relates to a construction method for rotating a bridge pier top, including the following steps: casting the bridge pier; arranging a rotation ball hinge at the top of the pier; casting the beam; arranging the rotation drive device and lifting device; connecting the rotation drive device to a turntable, causing the turntable to rotate under the force of the rotation drive device, thus rotating the beam; lifting the beam using the lifting device to ensure that the space at the bottom of the beam meets the requirements for installing supports; connecting the supports to the beam; and dismantling the rotation drive device and lifting device.

[0005] Chinese invention patent CN108396658A, published on August 14, 2018, discloses a method for the construction of a pier-beam consolidation of a wide cable-stayed bridge by rotating the bridge on top of the pier. The method includes the following steps: 1) Installing a ball joint on the top of the portal pier for the rotation construction of the cable-stayed bridge; 2) Installing stiffening ribs and jack bearing points on both sides of the cable-stayed bridge crossbeam corresponding to the pier columns of the portal pier; 3) After the cable-stayed bridge crossbeam is rotated into place, installing jacks on the top of the portal pier and lifting both sides of the cable-stayed bridge crossbeam; 4) When the lifting force of the jacks reaches the design value, placing permanent supports on both sides of the jacks and tightening the cable-stayed bridge crossbeam; 5) Welding steel connectors, releasing and removing the jacks, and filling with micro-expansion concrete for permanent sealing.

[0006] However, the aforementioned patent does not dismantle the rotating ball joint after the rotation is completed, and therefore does not disclose how to dismantle the rotating ball joint. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention proposes a device and construction method for removing the rotating ball hinge on the pier top, which solves the problem of how to remove the rotating ball hinge after the rotation construction on the bridge pier top, which is not disclosed in the prior art.

[0008] To achieve the above objectives, the technical solution of the present invention is implemented as follows: A device for dismantling a ball joint on a pier top includes a ball joint positioned between the pier column and the beam, a vertical jacking mechanism, and a ball joint dismantling mechanism. The vertical jacking mechanism is positioned between the pier cap and the beam to jack the beam. The ball joint dismantling mechanism includes a horizontal slide rail on one side of the pier column and a reaction frame on the other side of the pier column. The reaction frame is equipped with a reaction force pusher to push the ball joint into the horizontal slide rail. This invention employs a ball joint dismantling mechanism that enables lateral movement of the ball joint, accelerating the dismantling speed, saving turnover materials, and shortening the construction cycle for merging the continuous beam at the pier top. This invention uses a vertical jacking mechanism to jack the entire beam, with a jacking height not exceeding 1 cm, ensuring that the stress state of the beam remains essentially unchanged. Furthermore, it establishes two mechanical structural models: one for the ball joint dismantling structure and the other for the beam stress state during jacking, ensuring not only stability and safety but also shortening the construction period.

[0009] Furthermore, in order to connect the horizontal slide and the reaction frame of the ball joint removal mechanism through the pre-embedded parts, which not only saves materials but also facilitates construction, the ball joint removal mechanism also includes a pier pre-embedded plate pre-embedded in the pier column, and the horizontal slide and / or reaction frame are detachably connected to the pier pre-embedded plate.

[0010] Furthermore, to ensure the stability of the horizontal slide, one end of the horizontal slide is connected to the outer side of the pier cap via a front inclined rod, and the other end is connected to the embedded plate of the pier column on the middle span side via a rear inclined rod.

[0011] Furthermore, in order to utilize the existing rotating slide to support the horizontal slide, a rotating slide is provided on the support platform, and a column connects the rotating slide and the horizontal slide.

[0012] Furthermore, in order to enable the movement of the ball joint on the horizontal slide, a traction rod is provided on the side of the horizontal slide away from the pier.

[0013] Furthermore, in order to push the ball joint into the slide using the pusher, and at the same time provide reaction force support to the ball joint using the reaction frame, the reaction frame is provided with a reaction crossbar, the pusher is a horizontal jack, one end of the horizontal jack is connected to the reaction crossbar and the other end faces the ball joint.

[0014] Furthermore, in order to improve the stability of the reaction frame and the effect of the reaction support, the reaction frame includes horizontal bars and diagonal bars connected to the pier column embedded plate on the side span of the pier column. The ends of the horizontal bars and diagonal bars away from the pier column embedded plate intersect and are connected to form a triangular frame.

[0015] Furthermore, in order to lift the entire beam so that the ball joint can be removed and moved after removal, the vertical lifting mechanism includes a set of vertical lifting jacks installed on the rotating slide, and a rotating steel casing is provided between the upper end of the vertical lifting jacks and the beam.

[0016] Furthermore, in order to lower the ball joint to the ground, a through hole is provided in the beam body for a synchronous continuous jack to pass through for lowering the ball joint.

[0017] Furthermore, to make the movement of the ball joint in the horizontal slide smoother during the removal process, the horizontal slide is coated with drag-reducing grease.

[0018] Furthermore, in order to make the horizontal slide rail easy to manufacture using locally available materials, the horizontal slide rail is made of I-beams.

[0019] Furthermore, in order to facilitate the use of the vertical lifting jack assembly to lift the beam, the vertical lifting jack assembly includes multiple synchronous self-locking jacks.

[0020] Furthermore, in order to increase the lifting force, the vertical lifting jack group is provided with 6 groups, each group having 8 synchronous self-locking jacks.

[0021] The construction method for the removal device of the rotating ball hinge at the pier top as described in any of the above includes the following steps: S1. Remove the rotating steel casing and support legs on the middle span side; S2. Installation of ball joint removal mechanism: This includes connecting the horizontal slide to the pier embedded plate on the middle span side of the pier, setting up a column on the rotating slide and welding it to the horizontal slide, and connecting one end of the horizontal slide to the embedded plate on the outside of the pier cap through the front inclined rod, and connecting the other end of the horizontal slide to the pier embedded plate at the lower part of the middle span side of the pier through the rear inclined rod. S3. Installation of reaction frame on the side span of the pier: The embedded plate of the pier on the side span of the pier is connected to the horizontal bar and the diagonal bar. The reaction cross bar is welded on the horizontal bar and the transverse jack is installed. S4. Install the vertical lifting jack assembly; S5. Vertically lift the beam using a set of vertical lifting jacks; S6. Use the ball joint removal mechanism to remove the ball joint and lower the beam back to the permanent support.

[0022] The beneficial effects of this invention are: 1. The present invention adopts a ball joint removal mechanism, which can move the ball joint laterally, thereby speeding up the removal of the ball joint, saving turnover materials, and shortening the construction cycle of the continuous beam closure at the pier top; 2. This invention uses a pre-embedded plate on the pier column to connect a horizontal slide rail to support the rotating ball joint, thus saving materials; 3. The present invention uses a reaction frame and a pusher to push the ball joint into the slide, while the reaction frame provides reaction force support to the ball joint. 4. This invention makes full use of the existing anti-overturning rotation system to set up a vertical lifting mechanism to lift the entire beam body. The lifting height does not exceed 1cm, which fully ensures that the stress state of the beam body remains basically unchanged. 5. This invention establishes two mechanical structural models: one for the ball hinge removal structure and the other for the stress state of the beam during jacking. This not only ensures stability and safety but also shortens the construction period. 6. This application modularizes the dismantling device, which not only saves materials but also facilitates installation and dismantling, and speeds up material turnover; 7. This application provides a through hole in the beam, which facilitates the use of tools to lower the ball joint as a whole through the through hole. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1Top view.

[0025] The attached diagram labels are as follows: 1. Column, 2. Horizontal slide rail, 3. Rear diagonal brace, 4. Front diagonal brace, 5. Pier column embedded plate, 6. Horizontal jack, 7. Horizontal bar, 8. Reaction crossbar, 9. Diagonal brace, 10. Vertical lifting jack assembly, 11. Cylindrical top iron, 12. Steel pad, 13. Rotation slide rail, 14. Pier, 15. Rotation steel casing, 16. Beam, 17. Pier column, 18. Ball joint, 19. Through hole, 20. Traction rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0027] like Figure 1 As shown in Embodiment 1 of the present invention, a ball hinge removal device suitable for pier top rotation includes a ball hinge 18 disposed between the pier column 17 and the beam 16. Both the pier column 17 and the beam 16 have pre-embedded structures, including pre-embedded steel plates and / or bolts. These pre-embedded structures allow the upper and lower ends of the ball hinge 18 to be detachably connected to the pier column 17 and the beam 16, facilitating the removal of the ball hinge 18. The ball hinge removal device also includes a vertical lifting mechanism and a ball hinge removal mechanism. The vertical lifting mechanism is disposed between the pier cap 14 and the beam 16 for lifting the beam 16. In this embodiment, the existing anti-overturning rotation system is used to install the vertical lifting mechanism, providing sufficient support and lifting force for the entire beam. The ball hinge removal mechanism includes a horizontal slide 2 disposed on one side of the pier column 17 and a reaction frame disposed on the other side of the pier column 17. The reaction frame is equipped with a reaction pusher for pushing the ball hinge 18 into the horizontal slide 2.

[0028] Example 2, as Figure 1 As shown, the ball joint removal mechanism also includes a pier embedded plate 5 pre-embedded in the pier 17. Pier embedded plates 5 are pre-embedded on both the middle span side and the side span side of the pier 17. The horizontal slide 2 and the reaction frame are detachably connected to the pier embedded plates 5 on the pier 17. The horizontal slide 2 and the pier embedded plate 5 pre-embedded in the middle span of the pier 17 are vertically connected.

[0029] Furthermore, such as Figure 1 As shown, a foundation embedded plate is provided inside the foundation 14. In this embodiment, the foundation embedded plate is located on the outside of the foundation 14.

[0030] Furthermore, the end of the horizontal slide 2 furthest from the pier 17 is connected to the embedded plate of the pier cap 14 on the outside of the pier cap 14 via the front diagonal rod 4, and the other end of the horizontal slide 2, that is, the end closest to the pier 17, is connected to the embedded plate of the pier 17 at the lower part of the middle span side via the rear diagonal rod 3. Specifically, the lower end of the rear diagonal rod 3 is connected to the embedded plate of the pier 17 at the lower part of the middle span side, and the upper end is connected to the bottom of the horizontal slide 2.

[0031] Furthermore, the platform 14 is provided with a rotating slide 13, which is part of the existing rotating anti-tipping system. A column 1 connects the rotating slide 13 and the horizontal slide 2, and the column 1 supports the middle part of the horizontal slide 2.

[0032] The other structures are the same as in Example 1.

[0033] Example 3, as Figure 1 As shown, the horizontal slide 2 is provided with a traction rod 20 on the side away from the pier 17, which facilitates the installation of an electric hoist 21 to pull the ball joint 18.

[0034] The other structures are the same as in Example 2.

[0035] Example 4, as Figure 1 As shown, the reaction frame is connected to the pier column embedded plate 5 of the side span of pier column 17.

[0036] Furthermore, the reaction frame includes a horizontal bar 7 and a diagonal bar 9 connected to each other. The horizontal bar 7 and the diagonal bar 9 are respectively connected to the pier column embedded plate 5 on the side span of the pier column 17. One end of the horizontal bar 7 is vertically connected to the pier column embedded plate 5 on the upper part of the side span of the pier column 17, and one end of the diagonal bar 9 is inclined upwards at a certain angle to the pier column embedded plate 5 on the lower part of the side span of the pier column 17. The ends of the horizontal bar 7 and the diagonal bar 9 away from the pier column embedded plate 5 intersect and connect together, making the reaction frame a triangular frame structure.

[0037] The other structures are the same as in Example 2.

[0038] Example 5, as Figure 1 As shown, the reaction frame is equipped with a reaction crossbar 8. In this embodiment, the pushing component is a transverse jack 6, one end of which is connected to the reaction crossbar 8, and the other end extends toward the ball joint 18. The transverse jack 6 pushes the ball joint 18, and the reaction crossbar 8 provides reaction force support. In other embodiments, the pushing component can be other telescopic pushing mechanisms in the prior art.

[0039] The other structures are the same as in Example 4.

[0040] Example 6, as Figure 1 and Figure 2As shown, the vertical lifting mechanism includes a vertical lifting jack assembly 10 mounted on the rotating slide 13. Utilizing the existing rotating anti-overturning system's rotating slide 13 to install the vertical lifting jack assembly 10 simplifies the structure and makes its installation more convenient. The vertical lifting jack assembly 10 is located in the gap between the support legs. The lower end of the vertical lifting jack assembly 10 is connected to the rotating slide 13, and a rotating steel protective sleeve 15 is provided between the upper end of the vertical lifting jack assembly 10 and the beam 16. Furthermore, a cylindrical jack is provided at the upper end of the vertical lifting jack assembly 10, and a steel pad 12 is provided between the cylindrical jack and the rotating steel protective sleeve 15. Multiple steel pads 12 can be used to adjust the jack stroke.

[0041] Example 7: In order to facilitate the use of vertical lifting jacks to lift the beam, the vertical lifting jack group 10 includes multiple synchronous self-locking jacks.

[0042] The other structures are the same as in Example 6.

[0043] In Example 8, to increase the lifting force, the vertical lifting jack assembly 10 is provided in 6 groups, each group including 8 synchronous self-locking jacks, evenly and symmetrically arranged under the rotating steel casing 15. No vertical lifting jack assembly 10 is arranged at the bottom of the longitudinal axis beam, i.e., in the direction of the ball joint removal stroke.

[0044] The other structures are the same as in Example 7.

[0045] Example 9, as Figure 1 As shown, a vertical through hole 19 is reserved in the beam 16. A synchronous continuous jack is used to pass through the through hole 19 to vertically lift the ball joint 18 and slowly lower the ball joint 18 to the ground to complete the removal of the ball joint 18.

[0046] The other structures are the same as in Example 8.

[0047] In Example 10, the horizontal slide 2 is coated with drag-reducing grease, which makes the movement of the ball joint 18 in the horizontal slide 2 smoother during the removal process.

[0048] In addition, to facilitate the manufacture of the horizontal slide, the horizontal slide 2 is made of I-beams, which not only provides strength to the horizontal slide 2 but also improves its bending resistance.

[0049] The other structures are the same as in Example 9.

[0050] Example 11: A construction method for a pier-top rotating ball hinge removal device, comprising the aforementioned pier-top rotating ball hinge removal device, and further comprising the following steps: (1) Construction of embedded parts: Construction of pier cap 14 and pier column 17, according to the dimensions and elevation of the drawings, embed the pier column embedded plate 5 at the corresponding position of pier column 17.

[0051] (2) Processing of ball joint removal mechanism: including designing a suitable ball joint removal mechanism size according to the size of ball joint 18, and prefabricating the horizontal slide 2, front inclined bar 4, rear inclined bar 3 and column 1 of the ball joint removal mechanism according to the size of the ball joint removal mechanism.

[0052] (3) Remove the rotating steel casing 15 and the support feet: Remove the rotating steel casing 15 at the bottom of the middle span side beam 16 and the support feet below the rotating steel casing 15.

[0053] (4) Installation of the ball hinge removal mechanism on the middle span side of pier 17: including connecting the horizontal slide 2 to the embedded plate 5 on the middle span side of pier 17, setting up a column 1 on the rotating slide 13, welding the upper end of the column 1 to the horizontal slide 2, connecting the lower side of one end of the horizontal slide 2 to the embedded plate of the bearing platform outside the bearing platform 14 through the front inclined rod 4, and connecting the other end of the horizontal slide 2 to the embedded plate 5 at the lower part of the middle span side of pier 17 through the rear inclined rod 3.

[0054] (5) Installation of reaction frame on the side span of pier 17: Connect horizontal bar 7 and diagonal bar 9 on the pier embedded plate 5 on the side span of pier 17, and connect the other ends of horizontal bar 7 and diagonal bar 9 together. Then weld reaction cross bar 8 on horizontal bar 7. The reaction cross bar 8 is connected to the transverse jack 6.

[0055] (6) Install vertical lifting jack group 10: Install 6 vertical lifting jack groups 10 between the rotating steel casing 15 and the rotating slide 13, and the vertical lifting jack group 10 is set in the gap between the support legs; in this embodiment, 6 vertical lifting jack groups 10 are installed, and each vertical lifting jack group 10 contains 8 jacks. In other embodiments, other groups and numbers of jacks can be used.

[0056] (7) Vertically lift the beam body by using the vertical lifting jack group 10: Remove the bolts on the pre-embedded plates on the upper and lower sides of the ball hinge 18, then connect the ball hinge 18 into a whole, and then control the vertical lifting jack group 10 to lift the box girder simultaneously at multiple points.

[0057] (8) Remove the ball joint using the ball joint removal mechanism and lower the beam to the permanent support. The specific process is as follows: use electric hoist 21 to connect the traction rod 20 to the ball joint 18, and use horizontal jack 6 to cooperate. Start the horizontal jack 6 and electric hoist 21 to pull the ball joint 18 along the horizontal slide 2 to the bottom of the through hole 19. Use synchronous continuous jack (not shown in the figure) to vertically lift and lower the ball joint 18 to the ground through the through hole 19.

[0058] (9) Finally, the vertical lifting jack group 10 unloads and returns the oil, so that the beam 16 falls back onto the permanent support and forms a stable permanent structure.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features thereof, within the spirit and principles of the present invention, 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, and should all be included within the protection scope of the present invention.

Claims

1. A device for removing a rotating ball joint on a pier top, comprising a ball joint (18) disposed between the pier column (17) and the beam (16), characterized in that: It also includes a vertical lifting mechanism and a ball joint removal mechanism. The vertical lifting mechanism is set between the pier (14) and the beam (16) for lifting the beam (16). The ball joint removal mechanism includes a horizontal slide (2) set on one side of the pier (17) and a reaction frame set on the other side of the pier (17). The reaction frame is equipped with a reaction pusher for pushing the ball joint (18) into the horizontal slide (2).

2. The device for dismantling a rotating ball hinge on a pier top according to claim 1, characterized in that: The ball joint removal mechanism also includes a pier embedded plate (5) pre-embedded in the pier (17), a horizontal slide (2) and / or a reaction frame detachably connected to the pier embedded plate (5).

3. The device for dismantling the rotating ball hinge on the pier top according to claim 2, characterized in that: One end of the horizontal slide (2) is connected to the outside of the pier (14) via the front inclined rod (4), and the other end is connected to the embedded plate (5) of the pier (17) on the middle span side via the rear inclined rod (3).

4. The device for dismantling a rotating ball hinge on a pier top according to claim 2 or 3, characterized in that: The platform (14) is provided with a rotating slide (13), and a column (1) is connected between the rotating slide (13) and the horizontal slide (2).

5. The device for dismantling the rotating ball hinge on the pier top according to claim 4, characterized in that: The horizontal slide (2) is provided with a traction rod (20) on the side away from the pier (17).

6. The device for dismantling a rotating ball hinge on a pier top according to claim 2, 3, or 5, characterized in that: The reaction frame is provided with a reaction crossbar (8), and the pushing component is a transverse jack (6). One end of the transverse jack (6) is connected to the reaction crossbar (8), and the other end faces the ball joint (18).

7. The device for dismantling a rotating ball hinge on a pier top according to claim 6, characterized in that: The reaction frame includes a horizontal bar (7) and a diagonal bar (9) connected to the pier embedded plate (5) on the side span of the pier (17). The ends of the horizontal bar (7) and the diagonal bar (9) away from the pier embedded plate (5) intersect and are connected to form a triangular frame.

8. The device for dismantling a rotating ball hinge on a pier top according to any one of claims 1 to 3, 5 and 7, characterized in that: The vertical lifting mechanism includes a vertical lifting jack assembly (10) set on the rotating slide (13), and a rotating steel casing (15) is provided between the upper end of the vertical lifting jack assembly (10) and the beam (16).

9. The device for dismantling a rotating ball hinge on a pier top according to any one of claims 1 to 3, 5 and 7, characterized in that: The beam (16) has a pre-drilled through hole (19) for a synchronous continuous jack to pass through for lowering the ball joint (18).

10. The construction method for the removal device of the rotating ball hinge at the pier top as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Remove the rotating steel casing (15) and support feet on the middle span side; S2, Installation of ball joint removal mechanism: including connecting the horizontal slide (2) to the pier embedded plate (5) on the middle span side of the pier (17), setting up a column (1) on the rotating slide (13) and welding it to the horizontal slide (2), and connecting one end of the horizontal slide (2) to the embedded plate on the outside of the pier (14) through the front inclined rod (4), and connecting the other end of the horizontal slide (2) to the pier embedded plate (5) at the lower middle span side of the pier (17) through the rear inclined rod (3); S3. Installation of reaction frame on the side span of pier (17): The embedded plate (5) of the pier (17) on the side span of the pier connects the horizontal bar (7) and the diagonal bar (9), and the reaction cross bar (8) is welded on the horizontal bar (7) and the transverse jack (6) is installed. S4. Install the vertical lifting jack assembly (10). S5. Vertically lift the beam (16) using the vertical lifting jack group (10). S6. Use the ball joint removal mechanism to remove the ball joint (18) and lower the beam (16) onto the permanent support.

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