摘要
为了研究基于避灾疏散需求而设置平行导洞的隧道的临界长度,利用FDS软件,在单个火源未发生蔓延,人群逃生速度不发生变化和洞内风速为火灾工况控制风速2.5 m·s^-1的假定条件下,模拟超高海拔隧道火灾发展过程,分析火灾温度、烟雾扩散速度与隧道内人员逃生速度的关系,从防灾救援的角度提出:当人员逃生距离达约600 m时易发生危险,从而得到超高海拔单洞双向交通隧道设置避灾疏散平导时,其临界长度为1200 m。
In order to study the critical length of the tunnel with parallel pilot tunnel for evacuation,the FDS software was used to simulate the development of fire in tunnel at ultra-high altitude under the assumption that the single fire source does not spread,the crowd escape speed does not change,and the wind speed inside the tunnel is 2.5 m·s^-1 for the fire condition control.The relationship between fire temperature,smoke diffusion speed and personnel escape speed in the tunnel was analyzed.From the perspective of disaster prevention and rescue,it is proposed that when the personnel escape distance reaches about 600 m,it is danger-prone.Therefore,when a single-hole two-way traffic tunnel at ultra-high altitude is set with parallel pilot tunnel for evacuation,the critical length is 1200 m.
作者
焦卫宁
王雪霁
杨帅
杨瑞鹏
JIAO Wei-ning;WANG Xue-Ji;YANG Shuai;YANG Rui-peng(CCCC Second Highway Engineering Co.,Ltd.,Xi'an 710065,Shaanxi,China;CCCC First Highway Consultants Co.,Ltd.,Xi'an 710075,Shaanxi,China;School of Highway,Chang'an University,Xi'an 710064,Shaanxi,China)
出处
《筑路机械与施工机械化》
2019年第11期31-35,共5页
Road Machinery & Construction Mechanization
关键词
超高海拔
单洞双向交通隧道
平行导洞
临界长度
ultra-high altitude
single-hole two-way traffic tunnel
parallel pilot tunnel
critical length