多匝道公路隧道烟气控制方案研究
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  • 英文篇名:Study on the smoke control methods in multi-ramp road tunnel under fire
  • 作者:黄家成 ; 王东伟 ; 陈涛 ; 张敏
  • 英文作者:HUANG Jia-cheng;WANG Dong-wei;CHEN Tao;ZHANG Min;China Railway Tunnel Survey and Design Institute Co.Ltd.;Institute of Disaster Prevention Science and Technology,Central South University;Shenzhen City Public Safety Technology Research Institute Co.Ltd.;
  • 关键词:公路隧道 ; 多匝道 ; 临界风速 ; 烟气控制
  • 英文关键词:road tunnel;;multi-ramp;;critical velocity;;smoke control
  • 中文刊名:XFKJ
  • 英文刊名:Fire Science and Technology
  • 机构:中铁隧道勘测设计院有限公司;中南大学防灾科学安全技术研究所;深圳市城市公共安全技术研究院有限公司;
  • 出版日期:2018-08-15
  • 出版单位:消防科学与技术
  • 年:2018
  • 期:v.37;No.278
  • 基金:中铁隧道勘测设计院有限公司科技专项
  • 语种:中文;
  • 页:XFKJ201808016
  • 页数:5
  • CN:08
  • ISSN:12-1311/TU
  • 分类号:57-61
摘要
以南昌市某公路隧道为例,采用FDS数值模拟多匝道公路隧道的烟气流动规律,研究多匝道公路隧道的烟气控制方案。针对不同火灾场景设置了10组全尺寸模拟实验,分析坡度、弯曲度、匝道对烟气蔓延的影响。结果表明:火源功率为20 MW时,三车道隧道中部车道发生火灾时危险性最大;纵向风速为2.5m/s时,能有效控制烟气回流。在隧道坡度、弯曲度和多匝道耦合作用下,控制烟气回流的临界风速为3.5 m/s。在着火匝道火源上游设置挡烟垂壁能有效控制烟气向相邻匝道蔓延。
        Based on a road tunnel of Nanchang,the smoke flow regularity in multi-ramp road tunnel was studied by FDS numerical simulation to study the smoke control methods of multi-ramp road tunnel.The influence of slope,bending and ramp on the smoke spread was analyzed by 10 groups of full-scale experiments at different fire scenarios. The result showed that,when the heat release rate is 20 MW,fire in the middle lane of a three-lane tunnel is the most dangerous; the smoke back-layering is effectively controlled when the longitudinal ventilation velocity is 2.5 m/s.The ventilation velocity for control the smoke back-layering is 3.5 m/s under the coupling of tunnel slope,curvature and multi-ramp.The smoke screen set at the upstream of the fire ramp can prevent smoke spread to the adjacent ramp effectually.
引文
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