A bridge pier top rotation device
By using a bridge pier top rotation device with a removable component design, the problem of long construction time in deep foundation pits near operational railway lines was solved, enabling safe and rapid bridge construction and reducing costs.
Patent Information
- Application Number
- CN202521811495.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-25
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-08-25
AI Technical Summary
The construction of existing bridge swing bridges involves long construction time and high risks due to the deep foundation pits adjacent to operating railway lines, and the swing device cannot be reused, resulting in high construction costs.
Design a bridge pier top rotation device, including a pier, a rotation system, a traction system and a beam lowering system. It utilizes components such as an additional platform, a lower ball joint, an upper ball joint, a slide, support legs, and an upper turntable to achieve rotation through bolt connections and steel strand traction. Each component can be disassembled and reused.
The weight of the rotating structure was reduced, construction costs were lowered, and safety risks associated with nearby operational lines were avoided, enabling rapid construction.
Smart Images
Figure CN224943045U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, and specifically to a novel bridge pier top rotation device and construction method. Background Technology
[0002] With the continuous expansion and improvement of the domestic transportation network, the intersections between highways, railways, and municipal roads are becoming increasingly frequent. Railways are a major national transportation route and cannot be interrupted. To ensure smooth railway transport, bridges are often used to cross railway lines when highways and municipal roads intersect with them. The construction method for bridges crossing railway lines generally involves first constructing the bridge along the railway direction, and then using a turntable to rotate the bridge to achieve the purpose of crossing the railway line. Compared with traditional bridge construction, rotating bridges have the advantages of not interfering with traffic, maintaining uninterrupted navigation, and crossing frequently used roads, and construction is also faster. However, rotating bridges are generally located near existing railways, with the rotating system situated on the pier cap, resulting in long excavation and placement times for the foundation pit, and high risks associated with deep foundation pit construction. Furthermore, the increased weight of rotating bridges leads to a significant increase in costs, and existing rotating devices are disposable and cannot be reused. To ensure construction safety near operating lines as much as possible, reduce the weight of the rotating structure, and save construction costs, it is necessary to research a new type of bridge pier-top rotating construction device and method. Summary of the Invention
[0003] The main purpose of this utility model is to provide a new type of bridge pier top rotation device to solve the problem of long placement time in the construction of deep foundation pits near operating lines in the prior art, reduce the rotation weight, and save construction costs.
[0004] The technical solution adopted to achieve the above-mentioned objectives of this utility model is as follows: A bridge pier top rotation device includes at least a pier, a rotation system, a traction system, and a beam lowering system. The rotation system is installed on the top of the pier, and the middle part of the beam is connected to the rotation system. The rotation system includes: An additional platform is constructed by pouring concrete at the top center of the pier, and its height is higher than the height of the pad stones on both sides of the pier top. The lower ball joint has a downward-concave spherical surface on its top surface, which is fixed to the top of the platform by pre-embedding. The upper ball joint has a bottom surface that is a downward convex spherical surface. The upper ball joint and the lower ball joint fit together, and a pivot is set between them. The center of the beam is fixed at the top of the upper ball joint. The slide is installed on the cap beam at the top of the pier, and the slide is circular with the upper ball joint as the center. Support feet, multiple of which are evenly distributed along the slide, with the bottom of the support feet located in the slide and able to slide along the slide; The upper turntable has an overall circular structure and is fixed to the top of the support legs, with the beam located on the top surface of the upper turntable; The traction system is installed on the top of the bridge pier and connected to the upper turntable through steel strands. The traction system pulls the steel strands to drive the rotation of the upper turntable. The beam lowering system is installed on top of the bridge piers and can lift and lower the beams.
[0005] Furthermore, the bridge pier adopts a three-column structure, including a pier column and a cap beam, with pad stones placed above both ends of the cap beam.
[0006] Furthermore, a first positioning frame is pre-embedded inside the platform, and the lower ball joint is connected and fixed to the first positioning frame by bolts.
[0007] Furthermore, the rotating system is also equipped with sand boxes, which are evenly distributed at the bottom of the upper turntable to provide temporary support for the upper turntable.
[0008] Furthermore, a connecting flange is provided on the top surface of the upper ball joint, and the upper ball joint is connected and fixed to the beam body through the connecting flange and bolts.
[0009] Furthermore, the slide is installed as a whole, with a vibration hole in the middle. A second positioning frame is embedded in the cap beam below the slide. The slide is fixed to the second positioning frame with bolts and leveled with bolts.
[0010] Furthermore, the support legs are evenly arranged in six positions, and the top plate of the support legs has two round holes for pouring concrete inside. The top plate of the support legs has multiple bolt holes around its perimeter for connecting with the upper turntable.
[0011] Furthermore, the upper turntable is composed of a steel casing and upper and lower sealing plates. The steel casing is divided into four parts, and each pair of parts is connected by high-strength bolts. The upper and lower sealing plates are circular ring structures with dimensions larger than the steel casing. The upper sealing plate has pre-drilled bolt connection holes and discharge holes for pouring internal concrete. Steel strands are pre-embedded in the concrete inside the upper turntable. The upper sealing plate is fixed to the beam body through bolt connection holes and bolts. The lower sealing plate has pre-drilled bolt holes for connection with the support legs, and the lower sealing plate is fixed to the support legs through bolts.
[0012] Furthermore, the traction system consists of a reaction seat and steel strands. There are two reaction seats, which are set on the cap beam and distributed on both sides of the upper turntable. The reaction seats are connected to the upper turntable through the steel strands, and the upper turntable is rotated by traction steel strands.
[0013] Furthermore, the beam lowering system consists of four jacks, which are symmetrically arranged below the beam, and the vertical jacking force of the four jacks is greater than the weight of the beam itself.
[0014] Compared with the prior art, the novel bridge pier top rotation device provided by this utility model has the following technical effects: 1. The rotation system is placed on top of the pier, avoiding the safety risks caused by long-term excavation of the foundation pit near the operating railway line. At the same time, it reduces the weight of the rotation structure and lowers construction costs.
[0015] 2. All components in the rotation system are connected by bolts, which can be removed after the rotation construction is completed and reused. Attached Figure Description
[0016] Figure 1 This is a side view of the bridge pier top rotation device provided in this application; Figure 2 This is a top view of the bridge pier top rotation device provided in this application; Figure 3 The first front view of the bridge pier top rotation device provided in this application; Figure 4 The second front view of the bridge pier top rotation device provided in this application; Figure 5 This is a front view of the lower ball joint in the bridge pier top rotation device provided in this application; Figure 6 A top view of the lower ball joint in the bridge pier top rotation device provided in this application; Figure 7 The front view of the upper ball joint in the bridge pier top rotation device provided in this application; Figure 8 A top view of the upper ball joint in the bridge pier top rotation device provided in this application; Figure 9 A top view of the slide rail in the bridge pier top rotation device provided in this application; Figure 10 A cross-sectional view of the slide in the bridge pier top rotation device provided in this application; Figure 11 This is a front view of the support leg in the bridge pier top rotation device provided in this application; Figure 12 A top view of the upper turntable in the bridge pier top rotation device provided in this application; Figure 13 A cross-sectional view of the sand box in the bridge pier top rotation device provided in this application; In the diagram: 1-Pier, 101-Pier column, 102-Cap beam, 103-Slab, 2-Addition platform, 3-Lower ball joint, 4-First positioning frame, 5-Upper ball joint, 6-Rotating shaft, 7-Slide rail, 8-Second positioning frame, 9-Support leg, 10-Upper turntable, 11-Steel strand, 12-Reaction seat, 13-Jack, 14-Beam body, 15-Sand box. Detailed Implementation
[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0018] This embodiment provides a bridge pier top rotation device, the overall structure of which is as follows: Figures 1 to 4 As shown, the structure includes pier 1, a rotation system, a traction system, and a beam lowering system. The rotation system is installed on top of pier 1, and the beam 14 is connected to the rotation system in the middle. Pier 1 adopts a three-column structure, including pier column 101 and cap beam 102. Pad stones 103 are placed above both ends of the cap beam 102. The abutment 2 is made of concrete and is cast at the center of the top of pier 1, with a height higher than the height of the pad stones 103 on both sides of the pier top.
[0019] The structure of the lower ball joint 3 is as follows Figure 5 and Figure 6 As shown, its top surface is a downward-concave spherical surface, which is fixed to the top of the platform 2 by pre-embedding. A first positioning frame 4 is pre-embedded inside the platform 2, and the lower ball joint 3 is connected and fixed to the first positioning frame 4 by bolts. The structure of the upper ball joint 5 is as follows... Figure 7 and Figure 8 As shown, its bottom surface is a downward-convex spherical surface. The upper ball hinge 5 and the lower ball hinge 3 are interlocked, and a rotating shaft 6 is set between them. The center of the beam 14 is fixed to the top of the upper ball hinge 5. A connecting flange is provided on the top surface of the upper ball hinge 5, and the upper ball hinge 5 is connected and fixed to the beam 14 by the connecting flange and bolts. The structure of the sand box 15 is as follows. Figure 13 As shown, sand boxes are evenly distributed at the bottom of the upper turntable, providing temporary support. There is a gap of approximately 2cm between the bottom of the support legs and the slide rail, primarily to prevent the beam from tilting during rotation, serving as a safety measure. Due to this gap, the sand boxes are placed at the bottom of the upper turntable during steel beam assembly to support the beam; before rotation, the sand boxes are removed, allowing the entire steel beam to bear the force through the central ball joint; then, tensioning is achieved through steel strands, thereby driving the steel beam to rotate.
[0020] The structure of slide 7 is as follows Figure 9 and Figure 10 As shown, the slide 7 is set on the cap beam 102 on the top of the pier. The slide 7 is circular with the ball joint 5 as the center. The slide 7 is installed as a whole, with a vibration hole in the middle. The second positioning frame 8 is embedded in the cap beam 102 below the slide 7. The slide 7 is fixed to the second positioning frame 8 by bolts and leveled by bolts.
[0021] The structure of support leg 9 is as follows Figure 11As shown, multiple support legs 9 are evenly distributed along the slide 7. The bottom of the support legs 9 is located in the slide 7 and can slide along the slide 7. There are 6 support legs 9 evenly distributed. The top plate of the support legs 9 has two round holes for pouring concrete inside. The top plate of the support legs 9 has multiple bolt holes around its perimeter for connecting with the upper turntable 10.
[0022] The structure of the upper turntable 10 is as follows Figure 12 As shown, its overall structure is circular and fixed to the top of the support leg 9. The beam 14 is located on the top surface of the upper turntable. The upper turntable 10 consists of a steel casing and upper and lower sealing plates. The steel casing is divided into four pieces, and each pair of pieces is connected by M28×140 high-strength bolts. The upper and lower sealing plates are circular structures with a size larger than the steel casing. The upper sealing plate has reserved bolt connection holes and a discharge hole for pouring internal concrete. Steel strands 11 are embedded in the concrete inside the upper turntable 10. The upper sealing plate is connected and fixed to the beam 14 through bolt connection holes and bolts. The lower sealing plate has reserved bolt holes for connection with the support leg 9. The lower sealing plate is connected and fixed to the support leg 9 by bolts.
[0023] Traction system such as Figure 1 and Figure 2 As shown, it is set on the top of the pier 1 and connected to the upper turntable 10 through the steel strand 11. The traction system pulls the steel strand 11 to drive the upper turntable 10 to rotate. The traction system consists of a reaction seat 12 and a steel strand 11. There are two reaction seats 12, which are set on the cap beam 102 and distributed on both sides of the upper turntable 10. The reaction seats 12 are connected to the upper turntable 10 through the steel strand 11 and drive the upper turntable 10 to rotate through the traction steel strand 11.
[0024] The beam lowering system, located on top of pier 1, is capable of lifting and lowering the beam 14. The system consists of four jacks 13. Figure 3 As shown, four jacks 13 are symmetrically arranged below the beam 14, and the vertical jacking force of the four jacks 13 is greater than the weight of the beam itself.
[0025] The construction process of the bridge pier top rotation device provided in this embodiment is as follows: S1: Pier Construction: The piers adopt a three-column structure. The pier columns, cap beams, pad stones and abutments are constructed separately according to the layout position.
[0026] S2: Rotation System Installation: During the construction of the cap beam, pre-embed the sliding track and the lower second positioning frame; during the construction of the platform, pre-embed the lower ball joint and the first positioning frame. After the sliding track and lower ball joint are installed, install the upper ball joint, sand box, and support legs in sequence. The support legs are bolted to the upper turntable; therefore, the installation accuracy of the support legs' plane must be carefully controlled during installation.
[0027] S3: Upper Turntable Installation: The upper turntable consists of a steel casing and upper and lower end plates. The steel casing is divided into four pieces, which are bolted together after being transported to the site. The lower end plate has multiple bolt holes and is bolted to the support legs. The upper and lower end plates are welded to the steel casing, and then the whole unit is hoisted to the design position. Concrete is then poured inside the upper turntable, paying attention to the pre-embedded traction steel strands during the process.
[0028] S4: Traction System Construction: The traction system mainly consists of a reaction seat and steel strands. After the cap beam construction is completed, the reaction seat reinforcement is tied and concrete is poured. Steel strands are pre-embedded during the construction of the upper turntable, and additional steel strands are pre-embedded at the corresponding ends of the steel strands on the upper turntable for reinforcement.
[0029] S5: Beam Construction and Rotation: This process uses steel beams, which are assembled using supports. Bolt holes are made at the corresponding upper ball joint positions, and bolts are used to connect the beams to the upper ball joints. Rotation can be carried out after the steel beam construction is completed.
[0030] S6: Beam Lowering Construction: After the rotation is completed, a beam lowering system consisting of four jacks is installed on the cap beam. The four jacks are symmetrically arranged, and the vertical jacking force is greater than the weight of the beam itself, ensuring that the steel beam can be vertically lifted. After the steel beam is lifted by the jacks, the bolts of the support legs, upper turntable, and upper ball joint are removed in sequence. The additional platform on the top of the cap beam is cut off using a wire saw. Then, the vertical jacks are slowly lowered to place the beam on the permanent supports on both sides, completing the construction.
Claims
1. A bridge pier top rotation device, comprising at least a pier, a rotation system, a traction system, and a beam lowering system, wherein the rotation system is installed on the top of the pier, and the middle part of the beam is connected to the rotation system, characterized in that, The rotation system includes: An additional platform is constructed by pouring concrete at the top center of the pier, and its height is higher than the height of the pad stones on both sides of the pier top. The lower ball joint has a downward-concave spherical surface on its top surface, which is fixed to the top of the platform by pre-embedding. The upper ball joint has a bottom surface that is a downward convex spherical surface. The upper ball joint and the lower ball joint fit together, and a pivot is set between them. The center of the beam is fixed at the top of the upper ball joint. The slide is installed on the cap beam at the top of the pier, and the slide is circular with the upper ball joint as the center. Support feet, multiple of which are evenly distributed along the slide, with the bottom of the support feet located in the slide and able to slide along the slide; The upper turntable has an overall circular structure and is fixed to the top of the support legs, with the beam located on the top surface of the upper turntable; The traction system is installed on the top of the bridge pier and connected to the upper turntable through steel strands. The traction system pulls the steel strands to drive the rotation of the upper turntable. The beam lowering system is installed on top of the bridge piers and can lift and lower the beams.
2. The bridge pier top rotation device according to claim 1, characterized in that: The bridge piers adopt a three-column structure, including pier columns and cap beams, with pad stones placed above both ends of the cap beams.
3. The bridge pier top rotation device according to claim 1, characterized in that: The platform is internally embedded with a first positioning frame, and the lower ball joint is connected and fixed to the first positioning frame by bolts.
4. The bridge pier top rotation device according to claim 1, characterized in that: The rotating system is also equipped with sand boxes, which are evenly distributed at the bottom of the upper turntable to provide temporary support for the upper turntable.
5. The bridge pier top rotation device according to claim 1, characterized in that: The upper ball joint is provided with a connecting flange on its top surface, and the upper ball joint is connected and fixed to the beam body through the connecting flange and bolts.
6. The bridge pier top rotation device according to claim 1, characterized in that: The slide is installed as a whole, with a vibration hole in the middle. A second positioning frame is embedded in the cap beam below the slide. The slide is fixed to the second positioning frame with bolts and leveled with bolts.
7. The bridge pier top rotation device according to claim 1, characterized in that: The support legs are evenly arranged in six positions. The top plate of the support legs has two round holes for pouring concrete inside. The top plate of the support legs has multiple bolt holes around its perimeter for connecting with the upper turntable.
8. The bridge pier top rotation device according to claim 1, characterized in that: The upper turntable consists of a steel casing and upper and lower sealing plates. The steel casing is divided into four parts, and each pair of parts is connected by high-strength bolts. The upper and lower sealing plates are circular ring structures with dimensions larger than the steel casing. The upper sealing plate has pre-drilled bolt connection holes and discharge holes for pouring internal concrete. Steel strands are pre-embedded in the concrete inside the upper turntable. The upper sealing plate is fixed to the beam body through bolt connection holes and bolts. The lower sealing plate has pre-drilled bolt holes for connection with the support legs, and the lower sealing plate is fixed to the support legs through bolts.
9. The bridge pier top rotation device according to claim 1, characterized in that: The traction system consists of a reaction seat and steel strands. There are two reaction seats, which are set on the cap beam and distributed on both sides of the upper turntable. The reaction seats are connected to the upper turntable through the steel strands, and the upper turntable is rotated by traction steel strands.
10. The bridge pier top rotation device according to claim 1, characterized in that: The beam lowering system consists of four jacks, which are symmetrically arranged below the beam, and the vertical jacking force of the four jacks is greater than the weight of the beam itself.