Study of the Construction Technique of Reinforced Bar Product on Large and Variable Section Pylon

With the development of large span bridges, the height of the pylon is getting higher and higher, and the cross-sectional form of the pylon is getting more and more complicated, the construction of the pylon is a high-risk operation. The traditional pylon reinforcement construction uses manual asembling on the pylon, which is a labor-intensive high-altitude operation with high labor intensity, low construction efficiency, and not easy to guarantee quality. The pylon of Yanji Yangtze River Bridge is in the form of an octagonal outer cavity with a circular cross section, and the main reinforcement is arranged in four layers from outside to inside. The maximum diameter of the outer main reinforcement is 50 mm, the outer two layers and the third layer main reinforcement are connected by hoop reinforcement, and staggered arrangement of height directions. Based on the construction of the pylon of Yanji Yangtze River Bridge, the research on the construction technology of reinforcement bar was carried out for the characteristics of the pylon reinforcement, which solved the technical problems such as assembling of reinforcement parts, overall lifting and alignment docking on the pylon, which greatly reduced the labor intensity of operators, reduced the safety risk of overhead work and improved the quality of the pylon construction.