CONSTRUCTION METHOD FOR COMPOSITE SECTION STEEL HAVING MULTI-CONSECUTIVE-CLEAR SPAN TO UNITE BEAM WITH A PIER OF BRIDGE BY MAKING THE SUPPORTING POINT DESCEND AND ASCEND

摘要

PURPOSE: A construction method for composite section steel having multi-consecutive-clear span is provided to unite a beam with a pier of a bridge(pier), and to make compressive force to the upper concrete slab and the lower flange of composite section steel while make the supporting point descend and ascend, so that the stability and convenience are improved. CONSTITUTION: In the method, the composite section steel is united with a connection plate(1) by a bolt(2) and then placed on the upside of box section steel(4) which buried preliminarily in the pier. And the composite section steel is connected with a lower flange by welding. A supporting point of the frame is made descend. Thereafter all clear span is concreted and protected till the concrete harden, and then the supporting point is ascended, so that the compressive prestressed force is inducted to the concrete slab in the negative section and to the lower flange in the positive moment section.