A Summarized Account of Construction Techniques for Main Bridge of Nanjing Dashengguan Changjiang River Bridge on Beijing-Shanghai High-Speed Railway

The main bridge of Nanjing Dashengguan Changjiang River Bridge is a continuous steel truss arch bridge composed of two units of two-span continuous steel truss girders each with span arrangement(84+84) m and 6-span continuous steel truss arches with span arrangement(108+192+336+336+192+108) m.A summarized account of the construction technique features and construction methods of the bridge is presented herewith from aspects of the construction of deepwater foundations,manufacturing,transportation,storage,pre-assembling and anti-corrosion coating of the steel girders,installation of high-strength bolt connection sets,erection and closure of the girders.With the application of new materials,new structures,new equipment and new workmanship to the bridge,the problems encountered in the construction process were successfully resolved and the midspan high-accuracy closure of the long span steel truss arch bridge was smoothly realized under unstressed condition.