武汉天兴洲公铁两用长江大桥钢梁架设边跨合拢施工技术  

Construction Techniques for Side Span Steel Truss Girder Erection and Closure of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge

作　　者：邓永锋[1] 佘巧宁[1] 

机构地区：[1]中铁大桥局集团第五工程有限公司,江西九江332001

出　　处：《桥梁建设》2008年第6期1-4,共4页Bridge Construction

摘　　要：武汉天兴洲公铁两用长江大桥主桥为3片主桁、三索面的钢桁梁斜拉桥,其边跨钢梁合拢架设中遇到钢桁梁刚度大、斜拉索对标高调节力度有限、合拢点多等技术难题。经过现场监控测量与理论计算分析,采用了岸侧钢梁整体纵移、塔侧钢梁围绕塔墩支座适当转动、斜拉索微调等措施实现了边跨钢桁梁的高精度合拢。The main bridge of Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge is a steel truss girder cable-stayed bridge with three main trusses and three cable planes. In the side span steel truss girder erection and closure of the Bridge, the technical problems that the rigidity of the girder was great, the adjustment of stay cables in relation to the elevation was limited and the closure points were many were encountered. Through the monitoring, control and survey in the field and the theoretic calculation and analysis, the steel truss girder was eventually closed in high precision by way of globally longitudinally shifting the girder on the bank side, ap propriately rotating the girder on the pylon side around the pylon pier bearing and slightly adjusting the stay cables.

关 键 词：铁路与公路两用桥 斜拉桥 钢梁 桁梁 施工方法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U445.466[交通运输工程—道路与铁道工程]