主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (9): 1313-1316.

• • 上一篇    下一篇

火源横向位置及面积对双车道公路隧道临界风速影响研究

蔚艳庆   

  1. 四川省公路规划勘察设计研究院有限公司，四川 成都610041
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 作者简介:蔚艳庆（1979-），男，山西临县人，四川省公路规划勘察设计研究院有限公司高级工程师，硕士，主要从事隧道及地下工程的设计与科研工作，四川省成都市武侯祠横街1号，610041。

Investigation on the influence of transverse fire location and area on critical velocity in dual lane road tunnel

WEI Yan-qing   

  1. Sichuan Highway Planning, Survey, Design and Research Institute, Sichuan Chengdu 610041, China
  • Online:2021-09-15 Published:2021-09-15

摘要： 为了探明火源横向位置对临界风速的影响规律，运用FDS研究马蹄形断面双车道公路隧道内火源位于隧道中心与侧壁两种场景下的临界风速，并改变火源面积，结合理论分析，与前人矩形断面隧道内的研究结果进行对比。结果表明：单位面积热释放速率一定时，临界风速随火源面积的增大而增大；壁面火的临界风速小于中心火的临界风速，与矩形断面隧道存在差异；且随着火源面积的扩大，壁面火与中心火的临界风速比值趋近于1；不能用“镜面效应”解释马蹄形隧道内壁面火与中心火临界风速差异的原因。

关键词: 公路隧道, 临界风速, 火源横向位置, 火源面积, 马蹄形断面

Abstract: In order to explore the influence of transverse fire location and fire area on the critical velocity, the FDS software was used to study the critical velocity of central fire and near wall fire in the U-shaped section dual lane road tunnel, and the results were compared with those in the rectangular section tunnel. The results show that when HRRPUA is constant, the critical velocity increases with the fire area. The critical velocity of the near wall fire is smaller than that of the central fire, which is different from that in rectangular section tunnel. As the fire area gets bigger, the ratio of critical velocity of near wall fire and central fire approaches to 1, and the mirror effect cannot explain the difference of the critical velocity of near wall fire and central fire in the U-shaped section tunnel.

Key words: road tunnel, critical velocity, transverse fire location, fire area, U-shaped section