摘要
在我国公路行业标准、规范中缺乏对山岭公路隧道耐火极限与防火保护的相应规定。发生火灾时，首先应采取应对措施，保证隧道结构不会出现连续坍塌或严重掉块伤人情况，使司乘人员逃生疏散及消防人员救援与灭火具有足够的时间。火灾后隧道结构损伤应可进行维修，且其维修成本及因此中断营运的损失应可接受。通过对影响耐火极限与防火保护的诸多因素进行分析，并结合我国国情，提出了山岭公路隧道耐火极限为1-2h，一般应以隧道结构失去稳定性为判断标准，按此标准隧道结构一般无需附加防火层保护等建议。
Relative regulations on fire resistance limit and fire protection for mountain highway tunnels are wanting at present in codes and specifications of highway industry in China. During a fire, continuous collapse or heavy injury should not occur in the tunnel before passengers and crew have enough time to escape and evacuate, and firemen have enough time to rescue and extinguish the fire. After the fire, damages to tunnel structures should be repairable and repair cost and the cost due to interrupted operation should be acceptable. Based on the analysis of various factors affecting fire resistance limit and fire protection as well as current situation in China, author suggests that the fire resistance limit of mountain highway tunnels he 1-2 hours, depending on the stability of the tunnel. According to the stability standard of tunnels, tunnel structure needs not to be protected by a fire resistance layer.
出处
《现代隧道技术》
EI
北大核心
2009年第4期42-47,共6页
Modern Tunnelling Technology
关键词
山岭公路隧道
结构
耐火
保护
Mountain highway tunnels
Structure
Fire-resistance
Protection
