地铁站应急通风模式下自喷系统设计研究

Research on the automatic sprinkler system design of subway station under the emergency venting mode

以上海某标准岛式地铁站为侧，利用FDS软件对应急通风模式下自动喷水灭火系统在地铁站站台公共区火灾中的消防安全作用进行全尺寸数值模拟。模拟结果表明：在满足基本的应急通风风量的要求下。按照中危险Ⅰ级设置自动喷水灭火系统后，可以将预先设立的安全判定指标有效控制在安全范围内；火源附近CO体积分数降低50倍以上．环境温度降低10～15℃，能见度提升10m左右。各安全指标中，自动喷水灭火系统对环境温度影响最为显著。

Taking the example of a standard island type subway station in Shanghai, the full-size numerical simulation of the suppression for Subway platform fire by automatic sprinkler system under the emergency venting mode was carried out by FDS. The results showed that the safety indexes can be effec tively controlled in a safe range by setting automatic sprinkler system according to middle dangerous level I under the basic re- quirement of emergency ventilation. After the setting of auto- matic sprinkler system, the CO concentration near the fire was 50 times lower than before, the ambient temperature decreased by 10～15 ℃ , visibility improved about 10 m. The sprinkler system had the most significant effect on the environmental temperature in all the indexes.