柔性墩中央索面宽幅斜拉桥上部结构关键施工技术

Key Construction Techniques of Superstructure of Flexible Pier Center Plane Cable Stayed Bridge

柔性墩中央索面宽幅斜拉桥结构形式较为特殊,在主梁悬臂施工中对整体稳定、宽梁横向抗扭、索力调整及不平衡荷载控制均有十分严格的要求。结合浙江富阳鹿山大桥主桥上部结构,对独柱式塔、单箱五室箱梁、多主桁长大挂篮、环氧钢绞线斜拉索挂设、体系转换等关键施工技术进行了论述。

The structural form of flexible pier center plane cable stayed bridge is special. There are exacting requirements in multi-work situations of cantilever method construction, for instance, global stability, transverse anti-twisted abilities of wide-size box beam, adjusting the cable forces and controlling unbalanced load. Based on the superstructure of Lushan bridge, t.his paper introduced the key construction techniques in many aspects of single column tower, box girder, multi truss hanging basket, structure system transfer and so on.