嘉松公路越江大桥设计关键技术

Key Design Technologies for Jiasong Highway Cross-river Bridge

摘要:

嘉松公路越江大桥位于上海市松江区，主桥为（130+336+130） m半漂浮体系自锚式悬索桥。主梁采用钢箱梁，主梁尾端主缆锚固段为混凝土箱梁。桥塔为门形塔，采用窗花形横撑。主缆为平行双缆面布置，采用镀锌铝镁合金钢丝。单个桥塔下设置34根?2.0 m钻孔灌注桩。对该桥的抗风、抗震研究表明，大桥在采取气动改良措施后抗风性能良好，抗震性能均满足规范要求。

Abstract:

Jiasong Highway Bridge is located in Songjiang District, Shanghai. Its main bridge is a (130+336+130)m-span semi-floating system self-anchored suspension bridge. Its girder is a steel box girder, and the main cable anchorage section at the end of the girder is a concrete box girder. The bridge pylon is a portal-frame pylon with the lateral braces in the shape of window grilles. The main cable is arranged in parallel double cable planes and the zinc aluminum magnesium alloy steel wire is used. 34 ?2.0-m cast-in-place piles are installed under a single bridge pylon. The research on the wind and earthquake resistance of the bridge shows that after taking the aerodynamic modification measures, the wind resistance of the bridge is good, and the seismic performance of the bridge meets the requirements of the specifications.