METHOD OF CONSTRUCTING PRESTRESSED CONCRETE BOX GIRDER BRIDGE

PURPOSE: A method for constructing a pre-stressed concrete box girder bridge is provided to minimize stress concentration caused by loading repetitive loads and have excellent supporting performance of a concrete box girder bridge because cross beams for connecting adjacent concrete box girders in traverse direction is conveniently constructed. CONSTITUTION: A method for constructing a pre-stressed concrete box girder bridge is as follows. A opened cross section box girder(110) having a lower flange(111a), a pair of webs(111b), and partition walls is manufactured. The pair of webs is extended upward in a position separated from both ends of the lower flange. The partition walls are coupled to the pair of webs and the lower flange. In the lower flange and the webs of the opened cross section box girder, tendons embedded in longitudinal direction is tensed to apply compressed pre-stress to the opened cross section box girder. The opened cross section box girder is mounted on the upper part of piers(10) in multiple rows. Crossbeams(120) for connecting webs of the opened cross section box girder are installed so that can be consecutively connected with the partition walls in traverse direction.