CONSTRUCTION METHOD OF SINGLE SPAN AND MULTI SPAN COMPOSITE GIRDER BRIDGE

摘要

PROBLEM TO BE SOLVED: To provide the construction method of a single span and multi span composite girder bridge further introducing compression stress in upper floor board concrete and the lower flange of a composite girder of a negative moment zone through a process lowering and lifting an end supporting point.;SOLUTION: The construction method includes a step for providing a first abutment and a second abutment, a step for burying the shape steel of the bridge seat of the first abutment, a step for simply leaving a beam between the first abutment and the second abutment as it is, a step for connecting the shape steel of the first abutment and the lower flange of the beam, a step for placing joint concrete to the neutral axis of the beam from the upper part of the bridge seat part of the first abutment, a step for lowering the supporting point of the second abutment, a step for placing concrete to the floor board of the beam from the upper part of the joint concrete of the first abutment, a step for placing floor board concrete over the whole zone of the beam, and a step for lifting the supporting point of the second abutment side.;COPYRIGHT: (C)2002,JPO