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1.事故经过在某工地使用1台塔机拆卸附着式升降脚手架(简称爬架)时,出现塔机折臂事故。事故发生时,该塔机位于建筑物东侧,爬架位于建筑物南侧偏西,距地面高度约20m。由于爬架所在位置处于塔机司机的作业盲区,塔机司机起吊爬架只能依靠信号工发出指令。塔机、爬架、建筑物位置如附图所示。
1. Accident After using a tower crane at a construction site to remove the attachment type lifting scaffolding (referred to as the climbing frame), tower crane arm accident occurred. At the time of the accident, the tower crane was located on the east side of the building. The climbing frame was located west of the building to the south and about 20m above the ground. As the climbing position is located in the blind area of the driver of the tower crane, crane tower crane operator can only rely on the signal issued instructions. Tower crane, climbing frame, building location as shown in the figure.