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

蒋树屏1,2 田堃1 徐湃1

(1.重庆交通大学, 重庆 400074)
(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;

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This Article

ISSN:2096-4498

CN: 41-1448/U

Vol 38, No. 05, Pages 719-729

May 2018

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Article Outline

摘要

  • 0 引言
  • 1 研究背景
  • 2 火灾烟气运动理论
  • 3 1∶1足尺火灾试验
  • 4 结果分析
  • 5 结论与讨论
  • 参考文献