【摘要】 2018年超强台风"山竹"过境后,发生一起动臂式塔式起重机折臂事故,事故的直接原因为变幅笼头脱落。对此,进行了工作原理分析、相对位移测量、宏观形貌观察和表面微观形貌分析,得到动臂式塔式起重机变幅笼头脱落的根本原因是防脱螺栓紧固失效。更多还原

【Abstract】 After the super typhoon Mangkhut crossed the border in 2018,an accident of broken arm in a boom-type tower crane occurred. The direct cause of the accident is the falling of the luffing halter. In this regard,working principle analysis,relative displacement measurement,macroscopic morphology observation and surface microscopic morphology analysis were carried out. It is found that the primary cause of the falling of the luffing halter of boom-type tower crane is the tightening failure of the anti-off bolt.更多还原