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一、高层建筑的避难现划 超高层建筑的避难,如果以回到地面为基准,相当花费时间。一般在考虑避难问题时,总是以火灾层的人员逃到楼梯间为标准,没有考虑逃出大楼到达地面的问题。100米的高度大约需要15分钟的逃离时间,在防灾计划中包含避难计划,一般是以火灾层及其上层为对象来计算等待时间和滞留时间,没有考虑如此次世贸中心大楼那样的涉及整个楼层、大楼将整体坍塌的情况。飞机的避难计划是以满载乘客的情况下,90秒内能撤出所有人员为标准来设置安全门的。但在试验时往往没有考虑到人员的复杂性（如包含老人、儿童的撤离问题等）。大楼很难预先进行这种试验,大楼应在使用后一年内进
First, the evacuation of high-rise buildings Now planning the evacuation of high-rise buildings, if returned to the ground as a benchmark, quite time-consuming. When considering the issue of asylum in general, people in the fire layer always escape to the stairwell as a standard and do not consider the issue of escaping from the building to reach the ground. It takes about 15 minutes to escape at a height of 100 meters and a shelter plan is included in the disaster prevention plan. The waiting time and the residence time are generally calculated on the basis of the fire floor and its upper floors, without regard to the fact that the World Trade Center Tower Floor, the building will be the overall collapse of the situation. The plane’s evacuation plan is based on the full 90-second withdrawal of all personnel as a standard to set the security gate. However, the complexity of personnel (such as the inclusion of the elderly and the withdrawal of children) is often not considered in the experiments. The building is difficult to test in advance, and the building should be built within a year of its use