Design Considerations for Main Spans of Qiandao Lake Bridge

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.