采用双层区域模拟,建立了某双层地铁车站火灾的数学物理模型。在此基础上,应用CFAST3.1.7软件求解了各空间上层烟气温度浓度厚度跟随时间的变化关系,进而分析得出火灾达到危险状态所需时间大于人员安全疏散时间的结论。该结论对车站防排烟系统的合理布置具有重要的指导意义。 Using double-layer regional simulation, a mathematical and physical model of a double-deck metro station fire was established. On this basis, CFAST3.1.7 software was used to solve the relationship between temperature and concentration of thick smoke in the upper space and follow-up time, and then the conclusion was reached that the time required for the fire to reach the dangerous state is greater than the time of safe evacuation. This conclusion is of great guiding significance to the reasonable arrangement of smoke control system at the station.