According to the situation reported by the client and the information provided, on a certain construction site, a Zoomlion crawler crane had a boom accident during operation. The main boom and the super-lift mast were both bent and damaged. The right ear plate at the connection between the turntable and the main boom root was broken. The left bottom section arm was pulled off (left and right sides according to the driver's normal operating position). The hanging object fell to the ground and the driver was injured.
In order to further clarify the cause and responsibility of the accident, the client hopes to analyze the reasons for the boom accident of the crawler crane.
identification and analysis results:
The accident analysis expert group discussed and comprehensively technical analyzed the relevant information and on-site investigation and inspection of the "crawler crane" involved, and made the following analysis opinions:
1, the "crawler crane" involved was operating in violation of regulations, traveling sideways with load, the operating ground was uneven, and there were problems that far exceeded the regulations The horizontal inclination angle of the limit caused the steel truss hoisted object to deviate from the center line of the main arm and produce excessive bending torque, which was the main reason for the folding arm accident;
2 and the involved "crawler crane" continued to operate even when the inclination seriously exceeded the limit, the torque limiter alarmed and a fault message was displayed, and no effective lifting plan was implemented, which was the secondary reason for the folding arm accident.
