The smoke movement of fire smoke in island platform with two floors in subway was done by FDS with the scenario summer.The smoke, temperature and visibility at main exit of staircase were described.The changes of relative parameters were recorded to obtain the change law of temperature, visibility and volume fraction of CO, and to give theoretical reference to smoke controL%以地铁火灾与烟气发展过程的数学模型为基础,建立FDS模拟的物理模型,对双层岛式无屏蔽门的地铁车站站台在夏季的情况进行火灾数值模拟.模拟中选取主要楼梯出口对烟气、温度和能见度进行描述,记录相关参数变化情况,得出CO体积分数、温度、能见度的变化规律,为烟气扩散的有效控制提供理论依据.
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