摘要
隧道火灾是公路交通安全的重大隐患。本文以某长大城市公路隧道作为工程研究对象,针对其不同规模和风速的火灾工况,以能见度为评价指标,使用CFD数值模拟手段对其隧道火场逃生环境进行安全分析与评价。该隧道盾构段长3390m,外径14.5m,特殊火灾工况下采用完全纵向通风。研究表明,当隧道发生火灾时,纵向排烟模式能够控制烟气蔓延,大断面隧道的上部空间维持稳定的烟气层,隧道下部环境有利于疏散逃生和消防救援。
Tunnel fire is a serious disaster for road transportation safety. According to cases in different scales and wind velocities, we focus on tunnel fire saiety research on a long anta large roact tunnel in city using the visibility as a key evaluation indicator. The computational fluid dynamics simulation was employed to analyse the evacuation environment. The shield TBM section is 3,390 m and the outer di- ameter is 14.5m. This study shows, the longitudinal ventilation mode can control the spread of smoke in tunnel fire. A steady smoke layer maintain in the upper space of the large tunnel, consequently, the lower part of the tunnel will be favourable for evacuation and fire rescue.
出处
《低温建筑技术》
2017年第11期33-37,共5页
Low Temperature Architecture Technology
基金
上海市科学技术委员会科研计划项目资助(16DZ1201903)
关键词
长大隧道
火灾
计算流体动力学
能见度
long and large tunnel
fire
computational fluid dynamics
visibility
