城隍汉江特大桥总体设计

General Design of Chenghuang Hanjiang River Bridge

摘要:

城隍汉江特大桥是武汉都市圈环线高速公路孝感南段的控制性工程。该桥以单跨形式跨越汉江主航道，采用双塔钢混组合梁斜拉桥方案，主跨320 m，边中跨比为0.475。主梁采用小边箱组合梁，通过增加边跨桥面板厚度进行压重。考虑景观造型，索塔采用门形，“π”形上横梁，塔柱下接分离式承台群桩基础。全桥按双向6车道设计，采用半漂浮结构体系。经验算，结构静、动力分析结果均满足规范要求。城隍汉江特大桥的总体设计方案可为类似桥梁提供参考。

Abstract:

The Chenghuang Hanjiang Extra-Large Bridge is a key project of the Xiaogan south section of the Wuhan Metropolitan Area Ring Expressway. This bridge is a double-pylon steel-concrete composite beam cable-stayed bridge spanning the main channel of Hanjiang River in single-span form. Its main span is 320 m and the ratio of edge to center span is 0.475. The girder is a narrow-side-box composite girder. Considering the landscape modelling, the cable pylon is in portal form with π-shaped upper crossbeams. The pylon column is connected with the pile foundation of separated base slab group. The whole bridge is designed on the double-way 6-lane standard with the semi-floating structural system. After verification, the static and dynamic analyses results of the structures meet the requirements of the codes. The overall design scheme of the Chenghuang Hanjiang River Super Large Bridge can provide a reference for similar bridges..