Cable-stayed bridge structure

Abstract

The utility model provides a cable-stayed bridge structure which comprises a main beam, at least one central single-column tower is arranged on the main beam, an upper tower column of the central single-column tower is fixed to the two sides of the main beam through stay cables in a pulling mode in the width direction of a cable-stayed bridge, and transition piers for supporting the main beam are arranged at the two ends of the bottom of the cable-stayed bridge in the length direction of the cable-stayed bridge. A rotary table assembly for supporting a central single-column tower is arranged in the middle of the bottom of the cable-stayed bridge and comprises an upper rotary table and a lower rotary table, the upper rotary table and the lower rotary table are rotatably connected, and a lower tower column of the central single-column tower is fixedly connected with the upper rotary table. According to the utility model, the problem of structural system arrangement of a large-span wide-beam cable-stayed bridge under a swivel construction method is solved, and the structural stability of the cable-stayed bridge after construction is completed is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge design, and in particular to a cable-stayed bridge structure. Background Technology

[0002] With the gradual development and improvement of my country's transportation network, road construction conditions are becoming increasingly complex, and the requirements for driving comfort and safety are also getting higher and higher. There are more and more special bridge structures, and optimizing bridge design and construction is both a challenge and an opportunity for bridge structure engineers.

[0003] Currently, most small- and medium-span cable-stayed bridges in China adopt a central cable-stayed structure. However, for cable-stayed bridges with large spans and wide decks, in addition to considering the layout of the rotation system, stress safety, and structural stability during the rotation phase, it is also necessary to consider the torsional performance of the main beam during the operation phase. Therefore, it is necessary to design a new cable-stayed bridge structure to solve the structural system layout problem of large-span, wide-beam cable-stayed bridges under the rotation construction method and ensure the stability of the cable-stayed bridge structure after construction. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a cable-stayed bridge structure. This utility model solves at least some of the problems in the prior art.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a cable-stayed bridge structure, including a main beam, on which at least one central single-column tower is provided. Along the width direction of the cable-stayed bridge, the upper column of the central single-column tower is fixed to both sides of the main beam by stay cables. Along the length direction of the cable-stayed bridge, transition piers supporting the main beam are provided at both ends of the bottom of the cable-stayed bridge. A turntable assembly supporting the central single-column tower is provided at the middle position of the bottom of the cable-stayed bridge. The turntable assembly includes an upper turntable and a lower turntable, which are rotatably connected. The lower column of the central single-column tower is fixedly connected to the upper turntable.

[0007] Furthermore, the lower tower column is a single-column structure.

[0008] Furthermore, the bottom of the lower turntable is connected to several pile foundations.

[0009] Furthermore, on the side span of the cable-stayed bridge, an auxiliary pier supporting the main beam is also provided between the turntable assembly and the transition pier.

[0010] Furthermore, both the transition pier and the auxiliary pier are provided with two vertical supports at their tops for supporting the main beam.

[0011] Furthermore, the upper turntable and the lower turntable are connected by a ball joint.

[0012] Furthermore, a central single-column tower is provided on the main beam, and the central single-column tower is fixedly connected to the main beam of the cable-stayed bridge.

[0013] Furthermore, the main beam is provided with at least two central single-column towers, which are spaced apart along the length of the cable-stayed bridge. Two vertical supports are provided between the upper turntable and the main beam, and along the width of the cable-stayed bridge, the two vertical supports are located on both sides of the lower tower column.

[0014] Furthermore, a transverse wind-resistant support is provided between the central single-column tower and the main beam.

[0015] Furthermore, a longitudinal damper is provided between the upper turntable and the main beam. One end of the longitudinal damper is fixedly connected to the bottom of the main beam, and the other end of the longitudinal damper is fixedly connected to the upper turntable.

[0016] This utility model has the following beneficial effects:

[0017] This utility model provides a cable-stayed bridge structure that solves the problem of structural system layout for large-span, wide-beam cable-stayed bridges under the rotation construction method, and ensures the stability of the cable-stayed bridge structure after construction. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a single-tower cable-stayed bridge provided for an embodiment of this utility model;

[0020] Figure 2 A cross-sectional view of the central single-column tower of a single-tower cable-stayed bridge along the width direction of the cable-stayed bridge, provided for an embodiment of this utility model;

[0021] Figure 3 A schematic diagram showing the arrangement of the central single-column tower and vertical supports of a single-tower cable-stayed bridge provided for an embodiment of this utility model;

[0022] Figure 4 Provided for the embodiments of this utility model Figure 3 Enlarged view on the left;

[0023] Figure 5 Provided for the embodiments of this utility model Figure 3 Enlarged view on the right;

[0024] Figure 6A schematic diagram of a double-tower cable-stayed bridge provided for an embodiment of this utility model;

[0025] Figure 7 A cross-sectional view of the central single-column tower of a double-tower cable-stayed bridge along the width of the cable-stayed bridge, provided for an embodiment of this utility model;

[0026] Figure 8 A schematic diagram showing the arrangement of vertical supports, transverse wind-resistant supports, and longitudinal dampers for a double-tower cable-stayed bridge provided in this embodiment of the utility model;

[0027] Figure 9 Provided for the embodiments of this utility model Figure 8 Enlarged view on the left;

[0028] Figure 10 Provided for the embodiments of this utility model Figure 8 Enlarged view on the right.

[0029] In the diagram: 1. Cable-stayed bridge; 2. Central single-column tower; 3. Upper tower column; 4. Main beam; 5. Transition pier; 6. Turntable assembly; 7. Upper turntable; 8. Lower turntable; 9. Lower tower column; 10. Pile foundation; 11. Main span; 12. Side span; 13. Auxiliary pier; 14. Ground line; 15. Rotation system; 16. Vertical support; 17. Lateral wind-resistant support; 18. Longitudinal damper; 19. Pad stone; 20. Vertical support at the top of the transition pier; 21. Vertical support at the top of the auxiliary pier; 22. Cable stays. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a number" means two or more.

[0032] like Figures 1-10This utility model embodiment provides a cable-stayed bridge structure, including a main beam 4, on which at least one central single-column tower 2 is provided. Along the width direction of the cable-stayed bridge, the upper tower column 3 of the central single-column tower 2 is fixedly connected to both sides of the main beam 4 by cable stays 22. Along the length direction of the cable-stayed bridge 1, transition piers 5 supporting the main beam 4 are provided at both ends of the bottom of the cable-stayed bridge. A turntable assembly 6 supporting the central single-column tower 2 is provided at the middle position of the bottom of the cable-stayed bridge. The turntable assembly 6 includes an upper turntable 7 and a lower turntable 8, which are rotatably connected. In this embodiment, the upper turntable 7 and the lower turntable 8 are connected by an existing rotating system 15, which can be a ball joint or the like. The lower tower column 9 of the central single-column tower 2 is fixedly connected to the upper turntable 7.

[0033] The cable-stayed bridge structure provided by this utility model adopts a central single-column tower + spatial double-cable-stayed bridge structure system, which ensures the stability of the cable-stayed bridge structure after the rotation construction is completed, the main beam has good torsional performance during the operation phase, and it can be applied to low-pier bridges.

[0034] The main beam with a spatial double cable plane has a better multi-support stress condition than the existing central cable plane cantilever with a single support stress condition, and the main beam has better torsional resistance during the operation phase.

[0035] The central single-column tower can reduce the difficulty of rotation construction and improve the stress condition of the turntable during construction and operation.

[0036] In this embodiment, the lower tower column 9 is recessed into a single-column pier, and the pier height is relatively short. In this embodiment, the bottom of the lower turntable 8 is connected to several pile foundations 10.

[0037] In this embodiment, on the side span 12 side of the cable-stayed bridge 1, an auxiliary pier 13 supporting the main beam 4 is provided between the turntable assembly 6 and the transition pier 5. The auxiliary pier 13 greatly improves the stiffness of the main span by reducing the deflection of the side span main beam. In this embodiment, both the transition pier 5 and the auxiliary pier 13 are provided with two vertical supports at their tops for supporting the main beam 4.

[0038] The cable-stayed bridge 1 can be a single-tower, double-tower, or multi-tower structure; Example 1: For a single-tower cable-stayed bridge with only one central single-column tower 2 on the main girder 4, the central single-column tower 2 and the main girder 4 of the cable-stayed bridge can be fixedly connected, and the bridge layout is as follows. Figures 1-5 .

[0039] Example 2: For a double-tower or multi-tower cable-stayed bridge with at least two central single-column towers 2 on the main girder 4, an existing semi-floating structure can be adopted. Two vertical supports are provided between the upper turntable 7 and the main girder 4. The bridge layout of the double-tower cable-stayed bridge is as follows: Figures 6-10 Along the width direction of the cable-stayed bridge, the two vertical supports are located on both sides of the lower tower column 9. In this embodiment, the vertical supports include vertical supports 16 and pad stones 19.

[0040] Double-tower or multi-tower cable-stayed bridges are generally cable-stayed bridges with larger spans. Lateral wind-resistant bearings 17 and longitudinal dampers 18 can be used to further ensure the stability of the cable-stayed bridge structure during the operation phase.

[0041] In this embodiment, when at least two central single-column towers 2 are provided on the main beam 4, a transverse wind-resistant support 17 is provided between the central single-column tower 2 and the main beam 4.

[0042] In this embodiment, when at least two central single-column towers 2 are provided on the main beam 4, a longitudinal damper 18 is provided between the upper turntable 7 and the main beam 4. One end of the longitudinal damper 18 is fixedly connected to the bottom of the main beam 4, and the other end of the longitudinal damper 18 is fixedly connected to the upper turntable 7. In this embodiment, both the transverse wind-resistant support 17 and the longitudinal damper 18 adopt existing technology, which will not be described in detail here.

[0043] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cable-stayed bridge structure, characterized in that: The cable-stayed bridge includes a main girder, on which at least one central single-column tower is provided. Along the width direction of the cable-stayed bridge, the upper column of the central single-column tower is fixed to both sides of the main girder by stay cables. Along the length direction of the cable-stayed bridge, transition piers supporting the main girder are provided at both ends of the bottom of the cable-stayed bridge. A turntable assembly supporting the central single-column tower is provided at the middle position of the bottom of the cable-stayed bridge. The turntable assembly includes an upper turntable and a lower turntable, which are rotatably connected. The lower column of the central single-column tower is fixedly connected to the upper turntable.

2. The cable-stayed bridge structure as described in claim 1, characterized in that: The lower tower column is a single-column structure.

3. The cable-stayed bridge structure as described in claim 1, characterized in that: The bottom of the lower turntable is connected to several pile foundations.

4. The cable-stayed bridge structure as described in claim 1, characterized in that: On the side span of the cable-stayed bridge, an auxiliary pier supporting the main beam is also provided between the turntable assembly and the transition pier.

5. The cable-stayed bridge structure as described in claim 4, characterized in that: Both the transition pier and the auxiliary pier are equipped with two vertical supports at their tops to support the main beam.

6. The cable-stayed bridge structure as described in claim 1, characterized in that: The upper turntable and the lower turntable are connected by a ball joint.

7. The cable-stayed bridge structure as described in claim 1, characterized in that: A central single-column tower is provided on the main beam, and the central single-column tower is fixedly connected to the main beam.

8. The cable-stayed bridge structure as described in claim 1, characterized in that: The main beam is provided with at least two central single-column towers, which are spaced apart along the length of the cable-stayed bridge. The upper turntable is provided with two vertical supports between it and the main beam. Along the width of the cable-stayed bridge, the two vertical supports are located on both sides of the lower tower column.

9. The cable-stayed bridge structure as described in claim 8, characterized in that: A transverse wind-resistant support is provided between the central single-column tower and the main beam.

10. The cable-stayed bridge structure as described in claim 8, characterized in that: A longitudinal damper is provided between the upper turntable and the main beam. One end of the longitudinal damper is fixedly connected to the bottom of the main beam, and the other end of the longitudinal damper is fixedly connected to the upper turntable.

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