Abstract:The main bridge of Liuzhou Baisha Bridge is a single-pylon cable-stayed bridge with span arrangement of (200+200) m. The pylon is 106.2m high, and it adopts the anti- symmetrical curved and twisted steel structure. In view of the relatively large bending moment and tensile stress at the bottom of the pylon, a steel base is set up in the cap and connected with the pylon, and the reliability of the anchoring of the pylon is ensured by increasing the shear transmission surface between the steel and concrete . In order to enhance the overall rigidity and ensure the uniformity of force transmission and distribution in the consolidation zone of the pylon and girder, multiple orthogonal partitions are set up in the girder,so as to avoid the adverse effects caused by the oblique beam. The ANSYS general finite element software is used to carry out numerical simulation calculation on the stability of the pylon, and the result shows that the minimum stability safety factor is 12.9. The pylon adopts the overall construction scheme of gantry hoisting, combined with the key processes and measures of segment production, aerial alignment and splicing, and the construction accuracy meets the requirements.
