摘要
由于地铁站台层空间狭小,建筑结构形式如楼梯的位置设置及开口朝向方式、屏蔽门的安装等,对火灾烟气的流动会产生较大的影响。采用CFD方法,对岛式站台层内车厢中央位置着火时的烟气扩散进行数值模拟,比较楼梯结构、屏蔽门对火灾烟气扩散的影响。结果表明:站台层楼梯位置、结构、屏蔽门对烟气扩散都会产生极大的影响。楼梯开口朝向不同,可以使得排烟效率最高相差22.3%,温度最高相差53 K;安装屏蔽门后,大部分烟气被限制在轨道区域内,减少了高温烟气的危害,并提高排烟效率。优化楼梯结构设计及安装屏蔽门来实现对站台层火灾烟气的优化控制是切实可行的。
The platform layer of the subway station was a confined space, so different structures, such as the location and structure of stairs, the installation of platform edge door, have vital influence on the subway station fires. The fire was located on the platform layer of the train arranges on to simulate the smoke diffusion by CFD. The influence of different structures on smoke control was compared. Results indicate that different structures have different influence on the smoke flowing. The efficiency of exhaust was raised by 22.3%. Comparing the worst and the best situation and the temperature difference reaches 53K. The smoke was restrained in the railway space after installing the platform door to reduce the damage of high temperature smoke and raise the efficiency of exhaust. It＇s feasible to design the structures for optimizing the smoke control model by designing the location, the structure of stairs and the installation of platform edge door.
出处
《解放军理工大学学报（自然科学版）》
EI
2008年第6期681-686,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
地铁站
火灾
烟气控制
结构
subway station
fire
smoke control
structure
