The steel composite rahmen bridge construction technique for which preflexion steel girder was used

A construction method of a steel concrete composite rahmen bridge using preflexed steel girder is provided to prevent tension and cracks on the concrete caused by excessive stress within the concrete, and reduce statically indeterminate force of an abutment, thereby facilitating the construction with simplified abutment configuration. A construction method of a steel concrete composite rahmen bridge using preflexed steel girder comprises the steps of: constructing an abutment(10); performing preflexion on a steel girder; installing the preflexed steel girder on the abutment; pouring deck concrete on the steel girder; performing pre-correction for creep deformation and drying shrinkage between the steel girder and abutment; fixing upper sides of the steel girder and abutment with a high tension bolt; strongly coupling the steel girder and abutment by pouring concrete(18); performing deck concrete pavement and soft stone construction.