Reusable swivel spherical hinge support system and construction method

Abstract

The invention relates to a reusable swivel spherical hinge support system and a construction method, the reusable swivel spherical hinge support system comprises a bearing platform, a pier is arranged above the bearing platform, and the top of the bearing platform is provided with an assembled turntable, a spherical hinge support system, a swivel traction system and a swivel boosting system. The construction method comprises the following steps: (1) manufacturing the spherical hinge support; (2) mounting a spherical hinge support; (3) mounting the upper half part of the spherical hinge support and a bearing plate; (4) mounting supporting feet, slideways and the like; (5) sulfur mortar concrete temporary consolidation support and pier construction; (6) mounting a cross beam and an assembly type turntable; (7) mounting an upper structure and rotating a bridge; (8) pouring concrete at the post-pouring section of the pier; (9) the assembly type rotating disc and the like are sequentially disassembled; (10) hoisting the spherical hinge support; and (11) bolts are cut off, removed and poured. Compared with the prior art, the swivel spherical hinge support system has the advantages that the swivel spherical hinge support system capable of being repeatedly used is used, the purposes that the spherical hinge is detachable and can be repeatedly used are achieved, and economical efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a reusable swivel ball joint bearing system and a construction method. Background Art

[0002] With the rapid development of my country's railway, highway and other infrastructure construction, the number of bridge projects crossing existing lines or deep canyons is increasing. The bridge rotation construction method has become the preferred method for construction across existing lines or deep canyons due to its advantages such as short cross-line operation time, no restrictions on construction sites, low construction safety risks, and little impact on the operation of existing lines. However, the ball joints that traditional bridge rotations rely on are mostly one-time structures. After the rotation construction is completed, they are permanently sealed in the bridge structure and cannot be reused, resulting in a huge waste of resources and increased costs.

[0003] Based on this, a reusable swivel ball joint bearing system and its construction method need to be studied urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the problems mentioned in the background technology and to provide a reusable swivel ball joint bearing system and a construction method.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a reusable swivel ball joint bearing system, comprising a cap, a bridge pier is arranged above the cap, and an assembled turntable, a ball joint bearing system, a swivel traction system and a swivel boosting system are arranged on the top of the cap;

[0006] Steel bars are pre-buried between the cap and the pier, and are supported by temporary consolidation of sulfur mortar concrete or by post-casting of the pier. The steel bars can provide tension to ensure the stability of the bridge in an unbalanced state before the bridge is rotated, and can also serve as a connecting structure between the pier and the cap after the bridge is rotated;

[0007] A crossbeam is provided between the piers, the crossbeam is connected to the piers through pier embedded parts and high-strength bolts, and the assembled turntable is connected to the pier embedded parts through pins;

[0008] The ball joint support system is located below the cross beam, and includes a pressure plate, a ball joint support steel plate, a ball joint support, a positioning pin shaft, a ball joint support bolt, a support foot, a slideway and a sand box. The pressure plate is connected to the cross beam through a stiffening plate and a high-strength bolt. The ball joint support is fixed to the top surface of the pedestal through a support bolt. The support foot is arranged between the assembled turntable and the slideway on the top of the pedestal. A steel pad is arranged between the slideway and the support foot, and booster reaction seats are arranged on both sides of the support foot.

[0009] The rotating traction system comprises a traction rope and a traction force generating seat, one end of the traction rope is pre-buried in the bridge pier, surrounds the assembled turntable outside the bridge pier for multiple circles, and the other end passes through the traction reaction seat;

[0010] Before rotation, part of the structural load above the pedestal is borne by the temporary consolidation support, support legs and sand box of sulfur mortar concrete, and part of the load is transmitted to the ball joint bearing through the cross beam; during rotation, the temporary consolidation support, support legs, steel pads and sand box of sulfur mortar concrete are removed, and all the structural loads above the pedestal are transmitted to the ball joint bearing through the cross beam; after the rotation is completed, all the structural loads above the pedestal are borne by the post-cast section of the pier and the ball joint bearing. After the ball joint bearing system is dismantled by lifting equipment, all the structural loads above the pedestal are borne by the post-cast section of the pier.

[0011] As a preferred solution, the bridge pier is a box-type hollow thin-walled pier. During the rotation construction, a temporary hole is opened in the transverse direction or along the bridge. After the ball joint support is disassembled, the hole wall is sealed.

[0012] As a preferred solution, the bridge piers in the transverse direction of the bridge are double-limb thin-wall piers, V-shaped frame piers, Y-shaped frame piers or portal frame piers; the bridge piers in the longitudinal direction of the bridge are double-limb thin-wall piers, Y-shaped frame piers, inverted Y-shaped frame piers or V-shaped frame piers.

[0013] As a preferred solution, the bottom of the bridge pier in the initial state is a separated double-leg pier, which is connected by multiple cross beams to keep the double-leg pier under overall force and ensure that the upper load is transmitted to the ball joint support; the outermost cross beam is used to connect part of the assembled turntable components to form a complete turntable;

[0014] Stiffening plates or I-beams may be used to strengthen the transverse connection between the multiple cross beams between the piers to form an integral force-bearing structure.

[0015] As a preferred solution, the bottom of the pier is configured in a U-shape, which can ensure that the pier is subjected to stress as a whole and can also satisfy the requirement of direct connection between the assembled turntable and the pier.

[0016] As a preferred solution, the assembled turntable is a prefabricated component assembled on site, the material composition is a steel structure, a steel-concrete composite structure or a steel-UHPC composite structure, and the structural form is a truss structure or a solid-web structure.

[0017] As a preferred solution, the cross beam and the pressure plate are steel structures, steel-concrete composite structures or steel-UHPC composite structures;

[0018] When the cross beam is a steel structure, the interior of the cross beam is a truss structure or a solid-web structure;

[0019] When the cross beam and the pressure plate are steel-concrete composite structures or steel-UHPC composite structures, they are composed of steel structure, concrete / UHPC structure, shear nails and stiffening ribs, and the shear nails are channel steel, studs or PBL shear keys;

[0020] According to the cross section, it can be box section, dumbbell section, H section, I section, W section or I section;

[0021] According to the structure, there are two types: non-celled form and celled form.

[0022] As a preferred solution, the lifting equipment is a bridge crane or a jib crane, or a lifting machinery is used in conjunction with a translation device.

[0023] As a preferred solution, the function of the steel bars in the cap to provide tension can also be achieved by arranging a corbel on the outside of the pier, and anchoring a tie rod pre-buried in the cap on the corbel;

[0024] The corbel is a steel structure, a concrete structure, a steel-concrete composite structure or a steel-UHPC composite structure;

[0025] The pull rod is in the form of parallel steel strands, parallel steel wires or precision-rolled threaded steel bars, and is made of a metal cable body or a non-metal cable body.

[0026] A construction method of a reusable swivel ball joint bearing system comprises the following steps:

[0027] (1) Ball joint bearing production: According to the actual bearing capacity requirements of the on-site rotation project, the factory processes and produces the ball joint bearing components;

[0028] (2) Construction of the cap, traction reaction seat and installation of the ball joint bearing: tie the cap steel bars, traction reaction seat steel bars and formwork, embed the ball joint bearing bolts, level the embedded parts with leveling nuts, pour the cap and traction reaction seat concrete, remove the formwork after the concrete is fully vibrated and cured, and install the lower part of the ball joint bearing;

[0029] (3) Installation of the upper part of the ball joint support and the pressure plate: The upper part of the ball joint support is connected to the pressure plate through the ball joint support bolts, and then hoisted to the lower part of the ball joint support and the positioning pin shaft through the lifting equipment. After lubrication measures are taken, a manual test run is performed. A stiffening plate is welded on the top of the pressure plate for subsequent connection with the crossbeam;

[0030] (4) Installation of support legs, slides, booster reaction seats, and sand boxes: Install the annular slide, place steel pads and support legs at corresponding positions on the slide, and do a good job of positioning to ensure the subsequent connection between the support legs and the assembled turntable, and cast the booster reaction seats at the corresponding positions and place the sand box;

[0031] (5) Sulfur mortar concrete temporary consolidation support, bridge pier construction, and installation of crossbeams and assembled turntables: Install the formwork, first cast the sulfur mortar concrete temporary consolidation support, then erect the formwork on the sulfur mortar concrete temporary consolidation support, tie the bridge pier steel bars, embed the bridge pier embedded parts and traction cables, cast the bridge pier concrete, and maintain it in time;

[0032] (6) Installation of crossbeam and assembled turntable: Use lifting equipment to hoist the crossbeam and assembled turntable. The crossbeam is connected to the bridge pier through high-strength bolts, and the assembled turntable is connected to the bridge pier through pins.

[0033] (7) Installation of superstructure and rotation of bridge: After the construction of superstructure is completed, the traction cables are put in place, the steel pads and temporary consolidation supports of sulfur mortar concrete are removed before rotation, the gap between the slideway and the support legs is checked, the bridge is towed for rotation, and the balance of the beam is maintained during the rotation process;

[0034] (8) Concrete pouring of the post-cast section of the pier: After the bridge is rotated into place, remove the dust, dirt and dirt on the concrete surface of the post-cast section of the pier, remove the rust on the interface connecting steel bars, and then carry out the concrete construction of the post-cast section of the pier. Install the concrete formwork of the post-cast section of the pier, and pour the concrete after the steel bars and formwork are checked and found to be correct, and then perform timely maintenance;

[0035] (9) Remove the assembled turntable, support legs, booster and reaction seat and slideway in sequence;

[0036] (10) Installation of ball joint bearing: After the concrete strength of the post-cast section of the pier reaches the required level, the cross beam, bearing plate, upper part of the ball joint bearing, and positioning pin are removed in sequence using a lifting device. Then, the ball joint bearing bolts are loosened and the lower part of the ball joint bearing is removed.

[0037] (11) Remove the bolts of the lower half of the ball joint bearing, remove the dust, dirt and dirt on the concrete surface, and pour some waterproof concrete.

[0038] Compared with the prior art, the invention has the advantages of: by using a reusable swivel ball joint support system, the purpose of detachable and reusable ball joint is achieved, thereby improving the economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention only illustrates a three-dimensional stereogram of a rotating structure.

[0040] Figure 2 The present invention only illustrates a swivel structure elevation view.

[0041] Figure 3 The present invention only illustrates a plan view of the rotating structure.

[0042] Figure 4The present invention only illustrates two connection forms of double-limb piers.

[0043] Figure 5 The present invention only illustrates a type of connection between the pier and the abutment using a corbel and a tie rod.

[0044] Figure 6 The present invention only illustrates a structural elevation view of a beam and a partial ball joint support system.

[0045] Figure 7 The present invention only illustrates a structural plan view of a beam and a partial ball joint support system.

[0046] Figure 8 Schematic diagram of two types of beam structures in the present invention.

[0047] Fig. 9 Schematic diagram of the structure of two types of assembled turntables in the present invention.

[0048] Fig.10 It is a schematic diagram of the transverse arrangement of the piers of various rotary bridges in the present invention.

[0049] Fig.11 It is a schematic diagram of the arrangement of the piers of various rotary bridges in the present invention along the bridge direction.

[0050] As shown in the figure: 1. Cap, 2. Slide, 3. Thrust reaction seat, 4. Support foot, 5. Ball joint support, 6. Ball joint support bolt, 7. Sulfur mortar concrete temporary consolidation support, 8. Pressure plate, 9. Assembled turntable, 10. Pier embedded parts, 11. Crossbeam, 12. Pier, 13. High-strength bolts, 14. Pins, 15. Pier post-cast section, 16. Traction cable, 17. Traction reaction seat, 18. Stiffening plate, 19. Ball joint support steel plate, 20. Sand box, 21. Steel bar, 22. Corbel, 23. Pull rod. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0052] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0055] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Combined with Figure 1-11 A reusable swivel ball joint bearing system includes a bridge pier 12, an assembled turntable 9, a cross beam 11, a bridge pier embedded part 10, a high-strength bolt 13, a stiffening plate 18, a ball joint bearing system (a pressure plate 8, a ball joint bearing steel plate 19, a ball joint bearing 5, a positioning pin shaft, a ball joint bearing bolt 6, a support leg 4, a slideway 2, a sand box 20, etc.) and a swivel traction system and a swivel booster system, and a cap 1.

[0057] Force transmission mechanism during the rotation process of the bridge: before rotation, part of the structural load above the pedestal 1 is borne by the temporary consolidation support 7 of sulfur mortar concrete, the support leg 4 and the sand box 20, and part of the load is transmitted to the spherical joint bearing 5 through the cross beam 11; during rotation, the temporary consolidation support 7 of sulfur mortar concrete, the steel pads of the support leg 4 and the sand box 20 are removed, and all the structural loads above the pedestal 1 are transmitted to the spherical joint bearing 5 through the cross beam 11; after the rotation is completed, all the structural loads above the pedestal 1 are borne by the post-cast section 15 of the pier and the spherical joint bearing 5. After the spherical joint bearing 5 system is dismantled by the lifting equipment, all the structural loads above the pedestal 1 are borne by the post-cast section 15 of the pier.

[0058] Before pouring the said foundation 1, the steel bars 21 extending into the bottom of the pier are embedded in advance. Before pouring the said foundation 1, the ball joint bearing bolts 6 are embedded in advance, and the ball joint bearing is fixed to the top surface of the foundation by the ball joint bearing bolts 6 in the later stage. Before pouring the said pier 12, the pier embedded parts 10 are embedded in advance to facilitate the later installation of the crossbeam 11 and the assembled turntable 9. The said crossbeam 11 is connected to the pier embedded parts 10 by high-strength bolts 13. The assembled turntable 9 is connected to the pier embedded parts 10 by pins 14. The bottom of the said crossbeam 11 is connected to the swivel ball joint bearing system. When rotating, the two ends bear the upper structure load, and the middle part bears the reaction force of the ball joint bearing 5. The said pressure plate 8 and the crossbeam 11 are connected to the high-strength bolts 13 by the stiffening plate 18. A part of the said traction cable 16 is embedded in the pier 12, and it surrounds the assembled turntable 9 outside the pier 12 for multiple circles, and finally passes through the traction reaction seat 17. A steel pad is arranged between the slideway 2 and the support leg 4, and the pier 12 is connected to the abutment 1 by using steel bars 21 and temporary consolidation supports 7 of sulfur mortar concrete. Before rotation, the steel pad of the support leg 4 and the temporary consolidation supports 7 of sulfur mortar concrete are removed, and the steel bars 12 are cut.

[0059] The bridge pier 12 can be a box-shaped hollow thin-walled pier, which can be rotated in the transverse direction ( Fig.10 .a) or along the bridge ( Fig.11 .a) Open a hole temporarily and seal the hole wall after the ball joint bearing is disassembled.

[0060] The bridge pier 12 can be a double-limb thin-walled pier in the transverse direction of the bridge. Fig.10 .b) V-shaped frame pier ( Fig.10 .c) Y-type frame pier ( Fig.10 .d) or portal frame pier ( Fig.10 .e) etc.; along the bridge direction, it can be a double-limb thin-walled pier ( Fig.11 .b) Y-type frame pier ( Fig.11 .c) Inverted Y-shaped frame pier ( Fig.11 .d) or V-frame pier ( Fig.11 .e) etc.

[0061] The bottom of the bridge pier 12 may be a separate double-leg pier in the initial state, and is connected by multiple beams 11 ( Figure 4 .a), keep the double-limb pier under stress as a whole, and ensure that the upper load is transferred to the ball joint support 5; the outermost cross beam 11 is used to connect some of the assembled turntable 9 components to form a complete turntable. The multiple cross beams 11 between the piers can be strengthened with a stiffening structure (stiffening plates, I-beams, etc.) to strengthen the transverse connection and form an overall stress-bearing structure.

[0062] The bottom of the bridge pier 12 is arranged in a "U" shape ( Figure 4 .b), which can not only ensure the overall stress of the bridge pier, but also meet the requirement of direct connection between the assembled turntable 9 and the bridge pier 12.

[0063] The assembled turntable 9 is a prefabricated component assembled on site, and the material composition can be a steel structure, a steel-concrete composite structure, a steel-UHPC composite structure, and the structural form can be a truss structure ( Fig. 9 .a) Solid belly structure ( Fig. 9 .b).

[0064] The cross beam 11 and the pressure plate 8 can be a steel structure, a steel-concrete composite structure, or a steel-UHPC composite structure. When the cross beam 11 is a steel structure, the interior of the cross beam can be a truss structure ( Figure 8 .a) Solid belly structure ( Figure 8 .b). When the cross beam 11 and the pressure plate 8 are steel-concrete composite structures or steel-UHPC composite structures, they can be composed of steel structure, concrete / UHPC structure, shear nails and stiffening ribs, etc. The shear nails can be channel steel, studs, PBL shear keys; the cross section can be box section, dumbbell section, H section, I section, Wang section, I section. The structure can be non-celled or with cells.

[0065] The lifting equipment can be a bridge crane (beam crane, bridge crane, etc.), a jib crane (gantry crane, tower crane, etc.), or a lifting machinery (guide rail lift, rack climbing device, etc.) in combination with a translation device.

[0066] The embedded steel bars 21 in the abutment can provide tension to ensure the stability of the bridge in an unbalanced state before the bridge rotates, and can also serve as a connecting structure between the pier 12 and the abutment 1 after the bridge rotates.

[0067] The function of the pre-buried steel bars 21 in the cap 1 to provide tension can also be achieved by arranging a bracket 22 structure on the outside of the pier 12, and anchoring a tie rod 23 pre-buried in the cap 1 on the bracket 22 ( Figure 5The bracket 22 can be a steel structure, a concrete structure, a steel-concrete composite structure, or a steel-UHPC composite structure. The pull rod 23 can be in the form of parallel steel strands, parallel steel wires, or precision-rolled threaded steel bars, and can be made of metal cable bodies or non-metal cable bodies (basalt fiber).

[0068] The bridge pier post-cast section 15 can be a common reinforced concrete structure or a UHPC structure.

[0069] The swivel ball joint support system is not only applicable to the swivel at the bottom of the pier, but also to the swivel in the middle of the pier.

[0070] The present invention combines the traditional swivel system form and innovatively proposes a reusable swivel ball joint support system, which can realize the detachable and reusable functions of the ball joint and improve the economic efficiency.

[0071] When a reusable swivel ball joint support system of the present invention is implemented, the construction method includes the following steps:

[0072] (1) Production of ball joint bearing 5: According to the actual bearing capacity requirements of the on-site rotation project, the factory processes and manufactures the ball joint bearing 5 components.

[0073] (2) Construction of the cap 1, traction reaction seat 17 and installation of the ball joint bearing 5: Tie the cap reinforcement (part of the reinforcement 21 is exposed to facilitate the later connection with the bridge pier), the traction reaction seat reinforcement and the formwork, embed the ball joint bearing bolts 6, and level the embedded parts with the leveling nuts. Pour the concrete of the cap 1 and traction reaction seat 17, remove the formwork after the concrete is fully vibrated and cured, and install the lower part of the ball joint bearing 5 (the ball joint bearing bolts 6 are connected to the ball joint bearing steel plate 19).

[0074] (3) Installation of the upper part of the ball joint support 5 and the pressure plate 8: The upper part of the ball joint support 5 (the ball joint support steel plate 19) is connected to the pressure plate 8 through the ball joint support bolts 6, and then hoisted to the lower part of the ball joint support 5 and the positioning pin shaft through a lifting device, and manually tested after lubrication measures are taken; a stiffening plate 18 is welded on the top of the pressure plate 8 for subsequent connection with the crossbeam 11.

[0075] (4) Installation of the support legs 4, slideway 2, booster reaction seat 3, and sand box 20: Install the annular slideway 2, place steel pads and support legs 4 at corresponding positions on the slideway 2, and do a good job of positioning to ensure the subsequent connection between the support legs 4 and the assembled turntable 9, and cast the booster reaction seat 3 at the corresponding position and place the sand box 20.

[0076] (5) Construction of temporary consolidation support 7 with sulfur mortar concrete, pier 12, and installation of crossbeam 11 and assembled turntable 9: Install the formwork and first cast the temporary consolidation support 7 with sulfur mortar concrete; then erect the formwork on the temporary consolidation support 7 with sulfur mortar concrete, tie the steel bars of pier 12, embed the embedded parts 10 and traction rope 16 of pier, cast the concrete of pier 12, and maintain it in time.

[0077] (6) Installation of the cross beam 11 and the assembled turntable 9: The cross beam 11 and the assembled turntable 9 are hoisted by a lifting device. The cross beam 11 is connected to the bridge pier 12 by high-strength bolts 13, and the assembled turntable 9 is connected to the bridge pier 12 by pins 14.

[0078] (7) Installation of superstructure and (trial) rotation of bridge: After the construction of superstructure is completed, the traction rope 17 is put in place. Before the rotation, the steel pads and the temporary consolidation support 7 of sulfur mortar concrete are removed, the gap between the slide 2 and the support leg 4 is checked, and the bridge is towed to rotate. The balance of the beam is maintained during the rotation process.

[0079] (8) Concrete pouring of the post-cast section 15 of the pier: After the bridge is rotated into place, remove the dust, dirt and dirt on the concrete surface of the post-cast section 15 of the pier, remove the rust on the interface connecting steel bars, and then carry out the concrete construction of the post-cast section 15 of the pier. Install the concrete formwork of the post-cast section 15 of the pier, and pour the concrete after the steel bars and formwork are checked and found to be correct, and carry out timely maintenance.

[0080] (9) Remove the assembled turntable 9, the support legs 4, the booster reaction seat 3 and the slideway 2 in sequence.

[0081] (10) Lifting of the ball joint bearing 5: After the concrete strength of the post-cast section 15 of the pier reaches the required level, the following are disassembled in sequence using the lifting equipment: the cross beam 11; the pressure plate 8, the upper part of the ball joint bearing 5, and the positioning pin; then, loosen the ball joint bearing bolts 6 and disassemble the lower part of the ball joint bearing 5.

[0082] (11) The ball joint bearing bolts 6 in the lower half of the ball joint bearing 5 are removed, the dust, dirt and dirt on the concrete surface are cleared, and some waterproof concrete is poured.

[0083] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A reusable swivel ball joint bearing system, comprising a cap, a bridge pier is arranged above the cap, and is characterized in that: The top of the bearing platform is provided with an assembled turntable, a ball joint support system, a rotation traction system and a rotation boosting system; Steel bars are pre-buried between the cap and the pier, and are supported by temporary consolidation of sulfur mortar concrete or by post-casting of the pier. The steel bars can provide tension to ensure the stability of the bridge in an unbalanced state before the bridge is rotated, and can also serve as a connecting structure between the pier and the cap after the bridge is rotated; A crossbeam is provided between the piers, the crossbeam is connected to the piers through pier embedded parts and high-strength bolts, and the assembled turntable is connected to the pier embedded parts through pins; The ball joint support system is located below the cross beam, and includes a pressure plate, a ball joint support steel plate, a ball joint support, a positioning pin shaft, a ball joint support bolt, a support foot, a slideway and a sand box. The pressure plate is connected to the cross beam through a stiffening plate and a high-strength bolt. The ball joint support is fixed to the top surface of the pedestal through a support bolt. The support foot is arranged between the assembled turntable and the slideway on the top of the pedestal. A steel pad is arranged between the slideway and the support foot, and booster reaction seats are arranged on both sides of the support foot. The rotating traction system comprises a traction rope and a traction force generating seat, one end of the traction rope is pre-buried in the bridge pier, surrounds the assembled turntable outside the bridge pier for multiple circles, and the other end passes through the traction reaction seat; Before rotation, part of the structural load above the pedestal is borne by the temporary consolidation support, support legs and sand box of sulfur mortar concrete, and part of the load is transmitted to the ball joint bearing through the cross beam; during rotation, the temporary consolidation support, support legs, steel pads and sand box of sulfur mortar concrete are removed, and all the structural loads above the pedestal are transmitted to the ball joint bearing through the cross beam; after the rotation is completed, all the structural loads above the pedestal are borne by the post-cast section of the pier and the ball joint bearing. After the ball joint bearing system is dismantled by lifting equipment, all the structural loads above the pedestal are borne by the post-cast section of the pier.

2. A reusable swivel ball joint support system according to claim 1, characterized in that: The bridge pier is a box-type hollow thin-walled pier. During the rotation construction, a temporary hole is opened in the transverse direction or along the bridge. After the ball joint support is disassembled, the hole wall is sealed.

3. A reusable swivel ball joint support system according to claim 2, characterized in that: The bridge piers in the transverse direction of the bridge are double-limb thin-wall piers, V-shaped frame piers, Y-shaped frame piers or portal frame piers; the bridge piers in the longitudinal direction of the bridge are double-limb thin-wall piers, Y-shaped frame piers, inverted Y-shaped frame piers or V-shaped frame piers.

4. A reusable swivel ball joint support system according to claim 1, characterized in that: The bottom of the bridge pier in the early state is a separated double-leg pier, which is connected by multiple cross beams to keep the double-leg pier under stress as a whole and ensure that the upper load is transmitted to the ball joint support; the outermost cross beam is used to connect some assembled turntable components to form a complete turntable; Stiffening plates or I-beams may be used to strengthen the transverse connection between the multiple cross beams between the piers to form an integral force-bearing structure.

5. The reusable swivel ball joint support system according to claim 1, characterized in that: The bottom of the pier is arranged in a U-shape, which can ensure that the pier is subjected to stress as a whole and can also satisfy the requirement of direct connection between the assembled turntable and the pier.

6. A reusable swivel ball joint bearing system according to claim 1, characterized in that: The assembled turntable is a prefabricated component assembled on site, the material composition is a steel structure, a steel-concrete composite structure or a steel-UHPC composite structure, and the structural form is a truss structure or a solid-web structure.

7. A reusable swivel ball joint bearing system according to claim 1, characterized in that: The cross beam and the pressure plate are steel structures, steel-concrete composite structures or steel-UHPC composite structures; When the cross beam is a steel structure, the interior of the cross beam is a truss structure or a solid-web structure; When the cross beam and the pressure plate are steel-concrete composite structures or steel-UHPC composite structures, they are composed of steel structure, concrete / UHPC structure, shear nails and stiffening ribs, and the shear nails are channel steel, studs or PBL shear keys; According to the cross section, it can be box section, dumbbell section, H section, I section, W section or I section; According to the structure, there are two types: non-celled form and celled form.

8. The reusable swivel ball joint support system according to claim 1, characterized in that: The lifting equipment is a bridge crane or a jib crane, or a lifting machine is used in conjunction with a translation device.

9. The reusable swivel ball joint support system according to claim 1, characterized in that: The function of the steel bars in the cap to provide tension can also be achieved by arranging a corbel on the outside of the pier and anchoring a tie rod pre-buried in the cap on the corbel; The corbel is a steel structure, a concrete structure, a steel-concrete composite structure or a steel-UHPC composite structure; The pull rod is in the form of parallel steel strands, parallel steel wires or precision-rolled threaded steel bars, and is made of a metal cable body or a non-metal cable body.

10. A construction method for a reusable swivel ball joint bearing system, characterized in that: The following steps are involved: (1) Ball joint bearing production: According to the actual bearing capacity requirements of the on-site rotation project, the factory processes and produces the ball joint bearing components; (2) Construction of the cap, traction reaction seat and installation of the ball joint bearing: tie the cap steel bars, traction reaction seat steel bars and formwork, embed the ball joint bearing bolts, level the embedded parts with leveling nuts, pour the cap and traction reaction seat concrete, remove the formwork after the concrete is fully vibrated and cured, and install the lower part of the ball joint bearing; (3) Installation of the upper part of the ball joint support and the pressure plate: The upper part of the ball joint support is connected to the pressure plate through the ball joint support bolts, and then hoisted to the lower part of the ball joint support and the positioning pin shaft through the lifting equipment. After lubrication measures are taken, a manual test run is performed. A stiffening plate is welded on the top of the pressure plate for subsequent connection with the crossbeam; (4) Installation of support legs, slides, booster reaction seats, and sand boxes: Install the annular slide, place steel pads and support legs at corresponding positions on the slide, and do a good job of positioning to ensure the subsequent connection between the support legs and the assembled turntable, and cast the booster reaction seats at the corresponding positions and place the sand box; (5) Sulfur mortar concrete temporary consolidation support, bridge pier construction, and installation of crossbeams and assembled turntables: Install the formwork, first cast the sulfur mortar concrete temporary consolidation support, then erect the formwork on the sulfur mortar concrete temporary consolidation support, tie the bridge pier steel bars, embed the bridge pier embedded parts and traction cables, cast the bridge pier concrete, and maintain it in time; (6) Installation of crossbeam and assembled turntable: Use lifting equipment to hoist the crossbeam and assembled turntable. The crossbeam is connected to the bridge pier through high-strength bolts, and the assembled turntable is connected to the bridge pier through pins. (7) Installation of superstructure and rotation of bridge: After the construction of superstructure is completed, the traction cables are put in place, the steel pads and temporary consolidation supports of sulfur mortar concrete are removed before rotation, the gap between the slideway and the support legs is checked, the bridge is towed for rotation, and the balance of the beam is maintained during the rotation process; (8) Concrete pouring of the post-cast section of the pier: After the bridge is rotated into place, remove the dust, dirt and dirt on the concrete surface of the post-cast section of the pier, remove the rust on the interface connecting steel bars, and then carry out the concrete construction of the post-cast section of the pier. Install the concrete formwork of the post-cast section of the pier, and pour the concrete after the steel bars and formwork are checked and found to be correct, and then perform timely maintenance; (9) Remove the assembled turntable, support legs, booster and reaction seat and slideway in sequence; (10) Installation of ball joint bearing: After the concrete strength of the post-cast section of the pier reaches the required level, the cross beam, bearing plate, upper part of the ball joint bearing, and positioning pin are removed in sequence using a lifting device. Then, the ball joint bearing bolts are loosened and the lower part of the ball joint bearing is removed. (11) Remove the bolts of the lower half of the ball joint bearing, remove the dust, dirt and dirt on the concrete surface, and pour some waterproof concrete.

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