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利用CFD手段对某“+”字换乘岛式地铁车站的火灾场景进行模拟研究,根据该换乘站的结构特点以及防排烟运行方案,对不同位置(上下层车站、站厅)火源情况的烟气扩散及控制进行分析;根据上下层车站及换乘通道内烟气流动情况,提出对应火灾场景下的人员逃生路线的方案。研究表明:在现有防排烟系统运行方案下,上层车站发生火灾时,烟气不会扩散到下层车站;下层车站发生火灾时,有少量烟气会通过换乘通道扩散到上层车站,但在10min内不会对上层站台的人员造成危害,而换乘通道不宜作为乘客逃生路线。
CFD method is used to simulate the scene of a fire in the island subway station. According to the structural characteristics of the interchange station and the operation plan of smoke control, the fire risk of different locations (upper and lower stations and station hall) According to the flow of flue gas in the upper and lower stations and the transfer channel, a plan was put forward to deal with the escape route of personnel in the fire scene. The research shows that under the existing operation scheme of smoke and smoke control system, when a fire broke out at the upper station, the flue gas did not spread to the lower station. When a fire broke out in the lower station, a small amount of smoke would diffuse to the upper station through the transfer passage. Within 10min will not harm the personnel of the upper platform, and the transfer channel should not be used as a passenger escape route.