大跨度钢桁斜拉桥钢梁架设方案优化

南广铁路郁江特大桥主桥结构形式为（36m＋96m＋228m＋96m＋36m）双索面斜拉钢桁连续梁桥,钢梁架设方案原设计为从主墩对称向两侧架设钢梁,经过对工艺、工期、成本的综合论证,确定采用从边跨向中跨架设的方案。

Optimization of Erection Scheme of Steel Girder of Large Span Steel Truss Cable-stayed Bridge

The structural form of the main bridge of Yujiang River Bridge on Nanning-Guangzhou Railway is a cable-stayed bridge with double cable planes and with a 5 span continuous steel-truss girder（36 m＋96 m＋228 m＋96 m＋36 m）,the original erection scheme is that steel-truss girders are symmetrically erected from the main pier to both sides,and through the comprehensive demonstration on process,construction period and cost,the final erection scheme is that the steel-truss girders are erected from side span to mid-span.