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-  2015 

利用分段水喷雾系统对长大隧道进行分区保护的试验研究 Experimental study of using water mist segment as a fire compartment in tunnels

Keywords: 分段水喷雾,隧道,火灾,温度,烟气

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Abstract:

针对长大隧道提出一种分段水喷雾方法对隧道进行保护,即每隔350m左右设置一小段喷雾系统,火灾时开启对应区段两端的喷雾系统,利用喷雾区段的过滤作用阻止烟气向上下游扩散,保证区段外环境的相对安全,从而有利于人员逃生.利用10∶1模型试验和实体隧道火灾实验证明水喷雾段可以有效降低隧道温度,阻止烟气及热量向下游传播,水喷雾压力越大喷雾粒径越小,越有利于隧道降温作用,对隧道分区防护作用越明显;分段水喷雾流量和喷头不同布置对阻止烟气向下游扩散作用不明显,通风虽然会削弱水喷雾段对烟气扩散的阻止作用,但不妨碍其在隧道中的应用

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