On the basis of the analysis of the requirements for metro station fire smoke control and passenger evacuation, the basic concept and mode of smoke control design in metro are analyzed. Combined with a multilayer-structure underground station, a design of ventilation and smoke exhaust system are proposed. Through modeling of CFD simulation, the operation effect of ventilation and smoke exhaust system of fire accident case are validated. The result indicates that, the tunnel smoke control velocity, the velocity in the floor escalator opening, the available safety egress time index can meet the standard requirements. The Concept of design and accident operating mode can be provided as a kind of design model for underground station ventilation and smoke exhaust system.%在分析地铁车站火灾烟控和乘客疏散要求的基础上,分析了地铁防排烟设计的基本思路和模式,结合某多层结构地下车站,给出了通风排烟系统的设计方案.利用模拟仿真的方法对通风排烟系统火灾事故情况下的运行效果进行了验证评估.计算表明,隧道烟控流速、楼扶梯开口流速、可用安全疏散时间等指标均可达到规范的要求.提出的设计方案和事故运行模式可提供作为一种地下车站通风排烟系统设计的模式.
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