The 345 m super-high tower crossing the Yangtze River in Chizhou,Anhui Province is the key project of the national West-to-East Power Transmission Line-Baihetan-Zhejiang±800 kV UHV DC transmission line.For the construction and installation of the super-high towers,a stress analysis is carried out over all hoisting of the high-altitude rocker-arm derrick,which is an important way to ensure its construction safety and the success implementation of the West-to-East Power Transmission Project.This paper presents a multi-stage loading test to simulate the hoisting process of the rocker-arm derrick construction process.The full-range stress characteristics of the rocker-arm derrick under graded loading are clarified,and a finite element model of the rocker-arm derrick under high-altitude hoisting status is established considering the dynamic characteristics.The stress distribution law of the important structural members and nodes is clarified,and the design scheme of the high-altitude rocker-arm derrick is optimized based on the analysis of the extensive key working conditions.The research results may provide an important scientific support for the safe lifting construction of the swing arm derrick of the super-high tower.
关键词
超高输电塔/井筒吊装/高空摇臂抱杆/试验研究/数值仿真
Key words
super-high transmission tower/hoisting of shaft/high-altitude rocker-arm derrick/experimental study/numerical simulation
维普
万方数据