沪通长江大桥主桥技术特点  

Technical Characteristics of Main Bridge of Hutong Changjiang River Bridge

作　　者：高宗余[1] 

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：《桥梁建设》2014年第2期1-5,共5页Bridge Construction

摘　　要：沪通长江大桥为公铁两用桥,主桥为(142+462+1 092+462+142)m斜拉桥,通行4线铁路、6车道高速公路。主梁采用钢桁梁结构,箱桁组合截面,设置3片主桁,桁宽35m,桁高16m,桁梁不同区段分别采用Q500、Q420、Q370不同强度等级的钢材。钢桁梁节段在工厂采用全焊接技术整体制造。主梁的纵向约束方式为在桥塔处设置阻尼约束和限位装置,其余各墩均设置活动支座。桥塔为钻石形,高325m,采用C60高性能混凝土。斜拉索采用强度2 000MPa的高强度平行钢丝索。桥墩采用沉井基础,下部为钢结构,上部为钢筋混凝土结构。The Hutong Changjiang River Bridge is a rail-cure-road bridge. The main bridge of the bridge is the cable-stayed bridge having span arrangement （142＋462＋1 092＋462＋142） m and is designed to carry 4-track railways and 6-lane expressways. The main girder is the steel truss girder structure and in the cross section, the structure is of the box beam and truss girder composite section. The main girder is comprised of three main trusses, the width of the trusses is 35 m and the height is 16 m. In the different sections of the truss girder, the steels Q500, Q420 and Q370 of different strength grades are employed. The blocks of the truss girder are to be inte- grally manufactured in shop, utilizing the all-welding techniques. The longitudinal restraint way for the main girder is that the damping and limiting devices are to be set at the pylons and on the rest of all other piers, the sliding bearings are to be employed. A pylon of the bridge is of the dia- mond shape, the pylon is 325 m high and is to be constructed with C60 high performance con- crete. The stay cables are formed by the high-strength parallel steel wires with the strength of each wire being 2 000 MPa. The piers are to be supported on the caisson foundations, the lower parts of which are the steel structures and the upper parts are the concrete structures.

关 键 词：公路铁路两用桥 斜拉桥 钢桁梁 组合截面 整体钢桥面 全焊接整体制造 斜拉索 沉井基础 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U442.54[交通运输工程—道路与铁道工程]