随着城市建设的不断发展,高层建筑在全国各地广泛兴建,施工升降机作为高层建筑施工中必不可少的垂直运输机械,使用量不断增多,但重大事故也频繁发生,所造成损失越来越大,同时也给社会造成了严重不良影响。施工升降机安装高度达几十米至几百米,各种紧固螺栓、结构件数量较多,同 With the continuous development of urban construction, high-rise buildings are widely constructed all over the country. As the vertical transport machinery indispensable for the construction of high-rise buildings, construction elevators are increasing in use but major accidents are also occurring frequently, resulting in more and more losses , But also caused serious adverse social effects. Construction elevator installation height of tens of meters to several hundred meters, a variety of fastening bolts, the structure of the larger number, with