摘要
为了验证地铁区间隧道分区烟气控制这一全新方法的烟气控制效果,揭示其控制机理和特点,本文利用1∶5比例的隧道模型开展了烟气分区控制试验研究.结果表明4种通风方式均可使疏散通道保持较高压力,使气流由疏散通道有序流向行驶区,以阻止火灾烟气侵入疏散通道内,但不同通风方式在高温控制及烟气控制效果上存在差异.其中以疏散通道正压送风方式对人员疏散最有利,行驶区单侧排烟方式能较好控制火灾的高温危害,而行驶区双侧排烟方式阻止烟气进入疏散通道的效果最突出,但过高的风速不利于人员疏散.比较而言,疏散通道正压送风及行驶区单侧排烟相结合的通风方式的灾害综合控制效果最好,既能保障人员安全疏散,又能有效降低火灾高温的危害.
This paper utilized a 1∶5 scaling tunnel model to carry out the series fire experiments of smoke zoning control,which validates the revolutional smoke control method has wonderful effect.The experimental results indicate that 4 different types of ventilation can make the evacuation channel maintain a relative higher-pressure,let the air flow from evacuation channel to traffic zone orderly.Thus the smoke is prevented from the evacuation channel and hypothesis of smoke zoning control can be achieved,even though the efficiency of ventilations may be a little different.It also shows that blow to the channel is the best ventilation mode for passengers evacuation,and exhaust from one-side of traffic zone is the best way to reduce the damage of high-temperature,although exhaust from two-side of traffic zone can make the channel smoke-free completely,the very high speed of airflow will halt passengers go ahead.Comparatively,the best ventilation mode is to combine blow to the channel and exhaust from one-side of traffic zone,which can ensure the safety of evacuation as well as lower high-temperature in a fire hazard.
出处
《湘潭大学自然科学学报》
CAS
CSCD
北大核心
2010年第3期62-68,共7页
Natural Science Journal of Xiangtan University
基金
湖南省科技计划项目(2007GK3098)
关键词
地铁隧道火灾
分区烟气控制
疏散通道
火灾试验
fire in metro tunnel
smoke zoning control
evacuation channel
fire experiment
