PSC GIRDER WITH LOCATION EXTENDED ANCHORAGE, GIRDER BRIDGE AND CONSTRUCTION METHOD OF IT

摘要

The present invention relates to a PSC girder with extended location of an anchorage, and a girder bridge and a construction method of the girder bridge using same. The PSC girder has low height and sufficiently performs pretension by using a structure in which the positions of anchorages and strands positioned on both sides of the PSC girder are raised to the height of a bottom slab. The PSC girder comprises an upper flange; a middle part which is integrated and combined with the center lower side of the upper flange; a lower flange which is integrated and combined with the lower side of the middle part; a pair of extended parts which is formed on both end upper sides of the upper flange and protrudes upwardly to the same height as the bottom of a slab to be integrated with the upper flange; a plurality of sheath pipes which is installed in the PSC girder in the longitudinal direction of the PSC girder to have a downwardly convex curve at the center, and is spaced apart from each other in a vertical direction; a plurality of anchorages which is installed on both ends of the PSC girder in a longitudinal direction; and a plurality of strands which is installed by being inserted into the sheath pipes and whose both ends are fixed to the anchorages by being stretched to both directions, wherein one or more anchorages are installed on each of the extended parts and the strands are connected and fixated to the extended parts.