根据近几年塔吊维修发生的频数统计和点检定修积累的资料表明塔吊在现场的维修量是偏重的。紧急抢修时更换组件、套件多,备件费用较高,使基层施工单位难以承受,且高空维修比较困难也不安全,甚至有时因停机时间过长有可能造成重大施工质量事故。多数塔吊的故障可以通过预修得到解 According to the frequency statistics of the maintenance of tower cranes and the accumulated information from the inspection and repair in recent years, it is shown that the amount of maintenance of the tower cranes at the site is heavy. The replacement of components and kits during emergency repairs is costly and the spare parts cost is high, making it difficult for the grass-roots construction unit to bear, and maintenance at high altitudes is difficult and unsafe, and sometimes even major downtimes may cause major construction quality accidents. Most tower crane failures can be solved through pre-repair