千岛湖大桥主桥设计构思

Design Considerations for Main Spans of Qiandao Lake Bridge

根据桥址处建桥自然条件的特点及位于著名风景区的地理位置要求,千岛湖大桥主桥采用(70+7×105+70+40)m多孔长联V形墩预应力混凝土连续刚构,基础采用大直径嵌岩钢管混凝土桩。着重介绍了大桥的桥型、结构整体构思及桩基结构型式选择与施工方案,并简述了主梁、主墩的设计与施工。

In the light of the natural conditions at Qiandao Lake Bridge site and the environmental requirements of the famous scenery spot, the main spans of the Bridge are designed as a prestressed concrete continuous rigidframe bridge on Vshape piers, which is characteristic of multiple spans and long continuous unit arranged in (70+7×105+70+40) m. The large diameter concretefilled steel pipe piles to be built into rocks are selected for use for the Bridge foundations. This paper focuses on the bridge type, design considerations for the overall structure, selection of pile foundation structures and construction schemes, and also briefs the design and construction of the main girder and piers.