Installation Construction Techniques for Steel Truss Arch-Girder of Main Bridge of Xinlong Bridge in Changzhou

The main bridge of Xinlong bridge in Changzhou is a 3-span continuous half through steel truss arch bridge with 30.7 m + 100 m +30.7 m in length.It is the first highway bridge in China among the same kind of bridges.This paper introduces a construction method of installing steel truss arch-girder of the main bridge by full space scaffolding.The construction techniques of erecting full space scaffolding supporting system,installing steel truss arch-girder,closuring arch ribs and tightening high strength bolts are expatiated.This practice proves that the construction method is reasonable and provides the reference for the same project construction.