The subjective cause of the accident
(1) The driver is inexperienced, thinking paralysis, after the installation of cranes, for the hoisting of objects can not be carefully viewed and assessed the weight of the case, blind lifting.
(2) The driver illegal operation, not through strict compliance with the vehicle crane hoisting the strict provisions of the technical parameters, the result of the pair arm too long and boom amplitude too large, resulting in accidents.
(3) The vehicle Management department lacks the management, carries on the hoisting operation cannot arrange the personnel to carry on the scene command.
Second, the objective cause of the accident
(1) The vehicle crane does not have a torque limiter device to provide the driver with accurate technical parameters to avoid the occurrence of such accidents.
(2) The construction party can not provide the driver with the details of the hoisting material (such as size, weight, etc.), the hoisting of the arm is also lying in the closed compartment, the driver will not be in the car before the suspension of the detailed observation and estimate the weight.
III. Preventive MEASURES
(1) To strengthen the driver's safety practice education, so that it can skillfully master the relevant technology.
(2) Strictly abide by the Special equipment safety supervision regulations, such as the requirements of laws and regulations, the driver must hold a certificate, and the vehicle regular inspection, supervision and so on.
(3) for the special site of the project, the hoisting unit should be detailed investigation and demonstration, and make detailed work plan, but also to arrange full-time personnel on-site command.
(4) To load the vehicle torque limiter, fundamentally eliminate the overload and with the occasional security hidden trouble.
(5) When choosing the hoisting site, it is necessary to choose the flat hard and hard open space without softness, collapse and manhole cover.
(6) Maintenance of vehicles, to ensure that the vehicle is in good technical condition, especially to check the main arm, leg cylinder, support pad, variable amplitude cylinder and other components have no cracks, oil leakage and so on.
(7) Before hoisting, the driver must carry on the weight estimate to each piece and so on hoisting thing, forbid blindly hoisting.