跨铁路全焊接大跨度连续钢桁梁桥设计  

Design of Fully Welded Large Span Continuous Steel Truss Bridge over Railway

作　　者：刘桂红 

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2014年第1期4-6,共3页Railway Construction Technology

摘　　要：廊坊市光明道立交桥是一座全焊接跨京沪高铁和京沪铁路的大跨度悬索式、刚加劲弦三跨连续钢桁梁桥,通过对桥梁的静力计算、结构分析和架梁方案的计算,表明本立交桥结构受力合理、传力明确;结合桥址处的建桥环境而创新的钢梁安装方案,具有较好的稳定性和经济性。本桥设计有3个创新点:全焊接跨铁路悬索式刚加劲弦钢桁梁桥、整体钢桥面、转体施工跨中合龙法(中跨两支点相对旋转至跨中合龙)。Guangming Road overpass in Langfang is a fully welded span suspension stiffened three-span continuous steel truss bridge over the Beijing-Shanghai High-speed Railway and the Beijiug-Shanghai Railway. Static calculation of the bridge, structural analysis and girder program research show that Guangming Road overpass structure bears proper stress and reasonable force. The innovative installation based on the site environment boasts good stability and economic performance. The design involves three innovations ： fully welded rail stiffened suspension steel truss bridge, the overall steel deck, swivel construction method （ the two pivots of mid-span rotate to middle span and keel）.

关 键 词：跨铁路立交桥 全焊接 悬索式 连续钢桁梁桥 方案比选 结构分析 钢梁安装 

分 类 号：U448.211[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]