CONSTRUCTION METHOD OF GIRDER-RAHMEN COMPOSITE BRIDGE AND GIRDER-RAHMEN COMPOSITE BRIDGE THEREOF

摘要

The present invention relates to a construction method of a girder-rahmen composite bridge, wherein a rahmen structure is formed by extending an end wing wall of a PC girder from an end part of a girder body to be simply joined to the upper part of an abutment and joining concrete for integrating the top of the abutment and the end wing wall is deposited in a side to join a bridge deck and the abutment with a rebar, such that moment occurring from a major angle part is minimized to realize economic construction, and a girder-rahmen composite bridge thereof. According to the present invention, the girder-rahmen composite bridge comprises: a pair of abutments disposed on both ends of a bridge; a plurality of PC girder rows including a girder body introducing tension to a lower part and an end wing wall extended from the end part of the girder body to be mounted on the upper part of the abutment; joining concrete to integrated the top of the abutment and the end wing wall by concrete deposited in a site; and a bridge deck installed on the upper part of the PC girder. First and second tendons are arranged on the inner lower side of the girder body along a curved line to anchor both end parts on both sides of the girder body. A preloading tendon is removably disposed on the upper part of the girder body in the longitudinal direction of the girder body, wherein both ends of the preloading tendon are anchored on the end part of the PC girder to temporarily offset a part of upward moment generated by tension of the first tendon, and a middle part of the preloading tendon is supported to the top of a preloading pressing device disposed on the central upper part of the girder body.;COPYRIGHT KIPO 2019