Construction of 70-m Prestressed Concrete Box Girders with High-Level Precasting Bed Method

The East China Sea Bridge is the first bridge having ever been built in China offsea where the construction environment is very harsh. The 70m box girder of the Bridge is 4 m in depth, bridge deck is 15.05 m in width and weight per girder is about 2 000 t, which will be assembled with segmental precast method. To minimize the usage of large lifting equipment in the precasting yard, the box girders will be precast on highlevel precasting bed. In this paper, the design considerations, layout of precasting bed, types of formwork for the box girders, and selection of launching equipment and schemes are described. 