某工地发生一起塔机起重臂坠落恶性事故,造成2节塔身和5节起重臂报废,司机室损伤,工程停工2 3天。该塔机为TQ6 0 / 80型,当塔机将2 5t重的吊斗吊至约10m高度,起重、回转和行走3种动作同时进行时,吊斗和吊钩突然垂直落地,3 6 8t重的起重臂绕塔帽跨出的通轴划圆落下,起重臂端节 A tower crane accident occurred at a construction site, causing 2 towers and 5 jibs to be scrapped. The driver’s room was damaged and the work was stopped for 23 days. The tower crane is TQ6 0/80. When the tower crane hangs a 25t heavy crane to a height of about 10m, the crane and the crane suddenly land vertically when lifting, swiveling and walking are carried out simultaneously. 8t heavy lifting arm around the tower cap through the roundabout down, boom end section