256HC Mast SectionFactors affecting the safety of tower crane
The factors affecting the safety of tower crane are as follows:
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(1) The working height of tower crane is from 20 meters to more than 400 meters. The driver, installation personnel and maintenance personnel are all working at heights. With the rapid development of urban construction, the space that can be left to the construction unit has been very small. In this narrow space, the operation of tower crane is inevitably beyond the scope of the construction site, and the boom activity area often extends to the non construction area, so it is more difficult to install and maintain the construction machinery than to work on the ground. Once a tower fall accident occurs, it is not only easy to cause casualties of drivers, installers and maintenance personnel, but also endangers the safety of buildings, equipment and personnel in the surrounding non construction area. The tower crane itself will be damaged, and a serious tower fall accident will cause a tragedy of "machine damage and human death".
(2) For the tower crane in the construction of middle and high-rise buildings, tie bars (wall frame attached) shall be used every 16-20 m to connect the tower body and the structure of the building with anchoring devices. Some tower toppling accidents are caused by the unfitness of the device or the wall structure quality, and the tower crane and the building will be damaged after the tower toppling.
(3) Different from most internal combustion construction machinery, tower crane uses electricity as power source, and some tower crane operation areas have overhead power lines crossing over, so there are hidden dangers of electric shock in the internal and external environment of tower crane. Safe use of electricity and avoidance of overhead power lines is the primary part of tower crane safety management.
(4) Unlike most of the construction machinery that can be operated by machine alone, tower crane operation requires the cooperation of drivers, commanders (signalmen) and other special operators. Their technical quality or cooperation status has also become a factor affecting the safety of tower crane. Some tower crane accidents are caused by poor technical quality or poor cooperation of one or more of them.
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