地铁长大区间隧道火灾排烟模式有效性研究

Study on the Effectiveness of Fire Smoke Exhaust Model in Long-large Subway Tunnels

为了研究地铁长大区间隧道火灾烟气控制模式,以国内某在建长大区间隧道为研究实例。选取了区间隧道内3个不同的位置作为列车着火位置,分别为每种工况设置不同的排烟送风模式。基于FDS软件进行仿真模拟,研究各工况下,隧道内顶棚温度、风速、流量的变化及隧道顶棚稳定温度纵向分布,获得了不同工况下的排烟效果。研究表明,根据区间内着火位置不同,采取相对应的排烟送风模式,使火灾烟气的蔓延得到了有效控制。

In order to study the smoke control mode for the fire in long-large internal subway tunnel,a long-large tunnel under contruction in China was taken as an example.Three different positions in the interval tunnel were selected as the train fire position,and different smoke exhaust and air supply modes were set for each working condition.Based on the fire simulation using FDS,ceiling temperature,wind speed and flow volume,as well as the ceiling temperature longitudinal distribution were studied under various working conditions.The effect of smoke exhaust under different working conditions was obtained.The results showed that according to the difference of fire location in the interval,the corresponding smoke exhaust and air supply mode were adopted so that the spread of fire smoke was effectively controlled.