Cable-stayed buckling structure for bridge construction

Abstract

The invention discloses a cable-stayed buckle-hanging structure for bridge construction, include a steering support platform, a pole beam, an a arch rib, ground anchor,a front buckle, a Rear Cable and2 Cable Saddle Assemblies, The 2 cable saddle assembly are mounted on that steer support platform, The front buckle cable and the rear buckle cable are through cables, and are respectively connectedwith the arch rib and the ground anchor after passing through the buckle cable saddle assembly, and further comprises a balanced force component buckle cable, one end of the balanced force component buckle cable is connected to the ground anchor after passing through the buckle cable saddle assembly at one end of the rear buckle cable, and the other end of the balanced force component buckle cableis connected to the anchoring device on the steering support platform. The horizontal component force of the front and rear buckle cables is equal by setting the balanced component force buckle cables, so that the buckle tower will not be offset horizontally due to the unequal horizontal component force of the front and rear buckle cables, which is beneficial to the control of the arch rib alignment of the concrete filled steel tubular arch bridge in the construction process. In addition, the buckling tower does not need to be provided with a cable wind rope in the longitudinal direction during construction, and the whole cable-stayed buckling structure is simplified.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a cable-stayed buckle-hanging structure used for bridge construction. Background technique [0002] At present, my country is still in the rapid development of transportation infrastructure construction, especially in recent years, the concrete-filled steel tube arch bridge has developed rapidly due to its high strength, fatigue resistance, impact resistance, and beautiful appearance. Most of the concrete-filled steel tube arch bridges are constructed by the cable-stayed buckle-hanging method, which has become the most common and effective method for the construction of long-span concrete-filled steel tube arch bridges because of its universal adaptability. The currently used cable-stayed buckle system is mainly composed of buckle towers, jacks, buckle saddles and steel strand buckle cables as the buckle system. During the construction process, there will be the follo...

AI Technical Summary

Problems solved by technology

That is, the horizontal angles between the front and rear buckle cables and buckle towers are not equal, resulting in unequal horizontal component forces of the front and rear buckle cables, so there will be a horizontal force difference in the direction of the front buckle cable, and the difference in the horizontal component force acts on the buckle The tower will cause a horizontal deviation of the buckle tower, which will affect the mechanical performance of the buckle tower itself and the installation line of the arch rib;

[0004] The second is that the buckle cable for hanging the arch rib will produce a large vibration under the action of laminar wind, and the excessive vibration will cause a certain impact on the buckle tower, which will bring disadvantages to the buckle tower and cause the buckle cable itself to be stressed Unevenness and the fatigue damage of the buckle itself shorten the service life of the buckle;

[0005] Third, the cable saddles of the traditional structure are usually composed of steel plates, section steel and steering cable saddle wheels, and each cable saddle is equipped with 6 to 8 steel strand buckles, and the steel strand buckles are often squeezed during the construction process. Together, it will lead to lateral displacement of the steel strand buckle cables, and cause excessive friction between the steel strand buckle cables, which will lead to problems such as unsatisfactory passing effect of the steel strand buckle cables. to a certain error;

[0006] Fourth, the arch rib buckle point is the key link in the construction of the cable-stayed buckle-hanging method. The design of the arch-rib buckle point will directly affect the stress of the entire cable-stayed buckle-hanging system, which will lead to serious accidents.

In the prior art, the buckle point of the arch rib is generally set under the arch rib, the installation of the buckle cable is time-consuming, the operation is cumbersome, and the connection safety is difficult to ensure

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