泸州河东长江大桥总体设计  

Overall Design of Hedong Changjiang River Bridge in Luzhou

作　　者：宁伯伟[1] NING Bo-wei(China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 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：《桥梁建设》2022年第4期110-116,共7页Bridge Construction

摘　　要：为满足地方交通路网衔接和功能需求,泸州河东长江大桥主桥采用主跨520 m的双塔双索面混合梁斜拉桥,全长936 m,桥面总宽28.5 m(不含锚索区),近期按双向4车道布置,远期可改造为双向6车道。主桥中跨采用钢-混结合梁,由工字形钢板边主梁+混凝土桥面板组成,边跨采用π形混凝土边主梁;斜拉索采用平行钢丝斜拉索,斜拉索及其锚具分别采用PVF胶带和氧化聚合型防腐蚀技术进行长效防护,显著增强主桥的耐久性;桥塔采用钢筋混凝土门形塔,塔墩基础采用钻孔灌注桩。主桥边跨混凝土梁采用支架现浇,中跨结合梁采用单悬臂拼装架设。引桥长270 m,为与主桥桥面宽度布置保持一致,采用9孔30 m整幅混凝土连续箱梁。对主桥、引桥结构及混凝土桥面板进行计算分析,结果表明:主桥、引桥的静力和动力性能及桥面板纵、横向受力均满足规范要求。The main bridge of Hedong Changjiang River Bridge in Luzhou is designed as a two-pylon hybrid girder cable-stayed bridge with a main span of 520 m,which is a result of comprehensive consideration of the local transportation network accesses and the function requirements.With a total length of 936 m and full deck width of 28.5 m(exclusive of the sidelanes accommodating stay cable anchorages),the bridge is expected to carry four lanes of traffic after completion,but if needed,it has the capacity to accommodate 6 lanes of traffic in the future.The superstructure in the central span consists of I steel girders overlaid with concrete slabs,while the superstructures in side spans consist ofπ-shaped concrete girders.The stay cables,which are composed of parallel steel wires,are fanned out in double cable planes.To improve the durability of the main bridge,the stay cables and the anchorages are corrosion-protected by using PVF tape and oxidative polymerization coating,respectively.The pylons are reinforced concrete portal-framed structures supported by bored pile foundations.The concrete girders in the side spans are cast in situ with scaffoldings,the steel-concrete composite girders in the central span are erected by one-way cantilever assembly.The approach bridge,with a total length of 270 m,consists of 9 spans of concrete box girders with full width of 30 m to keep consistent with the width of the main bridge.The main bridge,approach bridge and concrete slabs were analyzed.It is shown that the static and dynamic properties of the main and approach bridges as well as the longitudinal and transverse load bearing behaviors of the concrete slabs meet the code requirements.

关 键 词：斜拉桥 结合梁 工字形钢边主梁 门形塔 桥面布置 耐久性 受力分析 桥梁设计 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]