地铁车站公共区烟气控制模式及效果研究

Study on the smoke control mode and effect of subway station public area

根据起火位置不同及烟气控制要求,给出了地铁车站公共区火灾工况下的烟气控制模式,运用FDS对地铁车站公共区火灾烟气控制效果进行模拟。结果表明,制定的烟气控制模式基本能够满足地铁车站公共区烟气控制要求;站厅公共区火灾工况下,起火区域的烟气温度未达到人体耐受极限条件,烟气没有蔓延至站台公共区,烟气控制满足人员疏散需要;站台公共区火灾工况下应开启隧道风机辅助排烟,确保扶梯口下行风速不小于1.5 m/s,防止烟气通过扶梯蔓延至站厅公共区。

According to the fire source location and smoke control requirement, the smoke control mode of subway station public area under fire was given. By FDS, the smoke control effect was simu-lated. Results showed that, the smoke control mode drafted can satisfy the smoke control requirement mostly; when the station hall was on fire, the smoke temperature didn＇t reach the human toler ance limit, and the smoke didn＇t reach the platform, so the smoke control can satisfy the evacuation requirement; when the platform was on fire, the tunnel fan should be open to help ventilation, and make sure the downward wind velocity at the beginning of the esca- lator should be more than 1.5 m/s, to prevent smoke from spread- ing to the station hall through escalator.