Abstract:The construction section V of the Airport Expressway South Extension Section (Ring Expressway - East Yuelin Road) Project is a highway-rail co-constructed double-deck elevated bridge. Its lower deck is the prefabricated U-shaped girder and its upper deck is the prefabricated small box beam. The construction technology of using a bridge girder erection machine to realize the synchronous erection of double-deck prefabricated girders is specially introduced. Two different hoisting schemes are developed to effectively solve the difficulties of limited girder pedestal in girder manufactory. The detailed construction analysis and safety checking calculation are carried out for the hoisting of double-deck prefabricated girders under the high-voltage power lines. The problems of hoisting under high-voltage power line with the great safety risk are solved. This construction technology is scientific and effective, which can guarantee the engineering quality and field safety, and have the important guiding significance for the construction of the similar projects.
