Research of Key Construction Techniques for Separated Steel Box Girders of a Long Span Cable-Stayed Bridge Carrying Both Highway and Light Rail

The main navigable span bridge of Shanghai Changjiang River Bridge is a steel box girder cable-stayed bridge with double pylons,double cable planes and with span arrangement(92+258+730+258+92) m and the bridge is designed as a 5-span continuous full floating system.The main girders of the bridge are of the separated twin girders,each being a streamlined flat closed structure.In this paper,the key techniques for the manufacturing,the integral transportation and field installation of the girders are presented.