English：

The No. 5 bridge tower of the main channel bridge of Changtai Yangtze River Bridge adopts asteel-concrete space diamond-shaped structure. In the construction of the middle tower column, thecomponentization scheme of steel reinforcement element →steel reinforcement sheet→steel reinforcementblock→steel reinforcement part is innovatively applied. After the prefabrication of the steel block infactory, the construction platform under the tower is assembled into parts, which is the most critical lastprocess before the tower. Aiming at the problems of complex assembly operation environment, variableblock size, large closure resistance and high precision requirements under the tower, the self-pushassembly jig and its supporting technology and control measures were developed. Technological innovationrealizes the rapid and accurate assembly of steel reinforcement parts of tower columns with large inclinedangles and variable cross-sections, lays a foundation for efficient assembly on the tower, and significantlyimproved construction efficiency and quality.