Research on Key Technology of Rapid Integrated Construction of Fully Prefabricated Rigid Frame Bridge

Abstract Based on the reconstruction and expansion project of an expressway, a set rapid construction technology for integrated erection fully prefabricated rigid frame bridges is proposed, which solves problems unmatched work efficiency each working face in conventional bridge erectors long period traditional suspension assembly technology. This method realizes this type highly urbanized areas. In method, new girder machine used to synchronously install precast segmental beams, pier top blocks column. At same time, beams near middle are assembled by cantilever installation transition optimized from half span temporarily fixing block arranging temporary prestressed tendons. improves 39.5d/unit 32d/unit, reduces interference traffic environment.