商合杭高铁芜湖长江公铁大桥总体设计  

General Design of Wuhu Yangtze River Rail-cum-road Bridge of Shangqiu-Hefei-Hangzhou High Speed Railway

作　　者：张州[1] 易伦雄[1] 王东晖[1] ZHANG Zhou;YI Lunxiong;WANG Donghui(China Railway Major Bridge Reconnaissance&Design Institute Co Ltd,Wuhan Hubei 430056,China)

机构地区：[1]中铁大桥勘测设计院集团有限公司,湖北武汉430056

出　　处：《中国铁路》2020年第6期12-18,共7页China Railway

摘　　要：商合杭高铁芜湖长江公铁大桥为主跨588 m的非对称矮塔斜拉桥,大桥具有跨度大、荷载大、主塔矮等技术特点。研究采用强箱弱桁组合结构主梁、2000 MPa高强度平行钢丝斜拉索、Q500qE高强钢材等新技术和新材料,解决塔矮、索平结构体系受力不合理的技术难题。研究并成功应用大型设置沉井基础,解决深水裸岩基施工困难的问题,开拓新型深水基础。从大桥的建设条件、总体布置、桥型方案、力学特征、技术创新等方面详细论述大桥的总体设计,为多功能合建桥梁设计提供借鉴。The Wuhu Yangtze River Rail-cum-road Bridge of Shangqiu-Hefei-Hangzhou High Speed Railway is an asymmetrical extradosed cable-stayed bridge with a main span of 588 m,featuring such technical characteristics as large span,heavy load and short main tower.The paper studies on application of the new technologies and materials,such as strong box and weak truss composite beam,2000 MPa high-strength parallel wire stay cables and Q500 qE high-strength steels,to resolve technical difficulties in improper stress of low tower and the structural system of parallel cables.Large open caisson foundation is studied and successfully applied to resolve the problem of deep-water construction on bare bed rock and develop new deepwater foundation.The paper elaborates general design of the major bridge in detail from the aspects of construction conditions,general layout,type scheme,mechanical characteristic and technical innovation of the major bridge,as a reference for design of multiple-function bridges.

关 键 词：商合杭高铁 芜湖长江公铁大桥 总体设计 强箱弱桁 斜拉桥 沉井基础 

分 类 号：U448.12[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]