摘要
河南电网500kV姚邵线2008年元月发生舞动倒塔事故。通过分析认为,恶劣天气引发的长时间导线持续舞动是导致事故的原因,由于导线长时间持续舞动,而塔身防盗螺母不能防松,导致螺栓松动脱落,进而导致铁塔辅助材脱落,铁塔结构体系变化最终引发事故。针对此情况,在姚邵线加装双摆稳定器和整个塔身横担以下防盗螺栓加装螺栓防松帽,以提高塔身的抗舞能力。
Jan. 2008, conductor gallop induced tower collapse occurred in Henan grid＇s 500 kV Yao-Shao Line. Analysis suggest that the accident is caused by the foul weather induced continuous conductor gallop over a long period, resulting in loose bolts on the tower and causing secondary members falling off. The structural change finally caused the accident. Based on this, double pendulum stabilizer and self-locking nuts were installed in Yao-Shao Line to improve tower anti-gallop capability.
出处
《电力建设》
2009年第3期24-27,共4页
Electric Power Construction
