地铁换乘车站共用站厅防火控制数值模拟

Numerical simulations on fire control of subway transfer station sharing one concourse

针对大型地铁换乘车站的共用站厅面积超大问题,从防火分隔、防排烟方面给出控制措施。采用FDS数值模拟方法,分析了共用站厅烟气控制效果。数值模拟结果表明,防火卷帘采用二次降落模式,火灾和烟气蔓延范围可以得到有效控制。建议换乘车站共用站厅面积超过5 000 m2时,在站厅层公共区设置二次降落防火卷帘,既保证火灾初期人员疏散的通畅性,又保证挡烟的有效性和防火分隔的完整性。

Some fire control solutions from both fire separation and smoke control perspective for the problem that different metro lines share one oversize concourse in the large-scale transfer station were made. FDS simulations were carried out to analyze the smoke control effect of concourse. Research results showed that when the fire roll shutters is shut m two steps, the fire and smoke spreading can be controlled effectively. It was suggested that when the area of the sharing concourse is over 5 000 m2, the fire shutter should be shut in 2 steps, to ensure the evacuation as well as the effectively smoke blocking and the integrity of fire separation.