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一、超载起吊导致倾翻折臂事故1．事故过程简述2000年,某公司在一建设工地用一台50t汽车起重机作卸煤沟廓道板墙钢筋上料施工时,准备将一批钢筋放置在廊道西侧双排架子上面,就位半径约20m。起重工捆绑挂好钩后,操作工按起重指挥信号先从拖拉机上吊起(此时回转半径14m),然后摆杆、趴杆。在趴杆过程中,致使起重机倾翻折臂,造成第四、五节臂损坏。操作人员在起重机前倾离地1～1．5m时从驾驶室跳出,幸未造成人员伤亡。
First, overloading and lifting led to tilt the folding arm accident 1. Brief Description of the Accident Process In 2000, when a company used a 50t truck crane for construction of the ditches of dredging ditches on a construction site, it was prepared to place a batch of steel bars on the double-row shelf on the west side of the corridor Bit radius of about 20m. Lifting hook bundle tied, the operator by lifting the command signal from the tractor hoist (at this time turning radius of 14m), and then swing rod, rod. During the collapse of the pole, causing the crane tilting the folding arm, causing the fourth and fifth arm damage. The operator jumped out of the cab when he was 1 ~ 1.5m away from the ground before the crane, but fortunately no casualties were caused.