Analysis of Strengthening Plan and Construction Control Points of Single Box Single Room Prestressed Concrete Continuous Box Girder Bridge

Due to a variety of factors one province builted 5×45m single box single room prestressed concrete continuous box girder bridge that have used 8 years, and it appeared crack and concrete-flake-off, moreover, it reduced the bearing capacity of the bridge and threat the normal use of the bridge seriously. This paper briefly describes the construction method about how to maintain the bridge, and it gives reference to construction of this kind engineering.