地铁区间隧道火灾通风模式的数值分析  

Numerical studies on ventilation modes in underground railway tunnel fire

作　　者：周孝清[1] 赵相相[1] 丁云飞[1] 郑志敏[1] 

机构地区：[1]广州大学

出　　处：《暖通空调》2006年第8期7-11,共5页Heating Ventilating & Air Conditioning

基　　金：国家自然科学基金资助项目(编号:50378022)

摘　　要：介绍了地铁区间隧道火灾常见的几种通风排烟模式,对其中一种最复杂的模式进行了数值分析.模拟分析得出,对于地铁实际工程中的单线盾构圆形隧道,在10 MW火灾强度下,着火区间隧道内2.6～2.9 m/s左右的纵向风速可以有效阻止烟气发生逆流;在着火区间隧道2.9 m/s的纵向风速下,未着火区间隧道两端对送送风速度为1～1.5 m/s时,联络通道内有风速为6 m/s左右的气流流向着火区间隧道,可有效抑制烟气通过联络通道向未着火区间隧道蔓延,保证人员的安全疏散.Presents several ordinary ventilation and smoke extraction modes, and simulates the most complex one of them, The results show that for the single-track shield tunnel in actual projects, the longitudinal ventilation velocity of 2.642,9 m/s can effectively prevent smoke from counter flow at a heat release rate of 10 MW; when the tunnet sector oll fire with a longitudinal velocity of 2.9 m/s and the unfired tunnel sector with the velocity of 1-1.5 m/s from both ends.there is an air tlow with the velocity of 6 m/s to the tunnel on fire in the connected runnel, so the smoke diffusion to the unfired tunnet is effectively prevented, and the security of evacuation is ensured.

关 键 词：地铁区间隧道火灾 通风排烟模式 临界风速 联络通道 

分 类 号：U453.5[建筑科学—桥梁与隧道工程] U458.1[交通运输工程—道路与铁道工程]