沉管隧道火灾温度场分布规律研究——以港珠澳大桥沉管隧道为例
(2.招商局重庆交通科研设计院有限公司, 重庆 400067)
【摘要】为了解沉管隧道火灾发生时其周围温度场的分布规律及其影响因素, 建造沉管隧道试验平台, 采用1∶1足尺火灾试验和FDS数值仿真计算相结合的方法, 对沉管隧道火灾发生时隧道内温度场的分布规律进行系统研究, 得到如下结论:1) 隧道发生火灾时, 一定的纵向风速可有效降低拱顶最高温度;2) 不同火源类型对火灾拱顶最高温度和火势发展影响较大;3) 50 MW火灾下, 洞内设备耐高温的安全位置为边墙高度3.5 m以下;4) 火灾最高温度与火源规模、纵向风速均呈正相关。
【关键词】 沉管隧道; 足 (全) 尺寸实验; 防灾减灾; 油池火; 木垛火; 温度场;
【DOI】
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ISSN:2096-4498
CN: 41-1448/U
Vol 38, No. 05, Pages 719-729
May 2018
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