环境风作用下浅埋隧道自然排烟竖井组高度研究  

Research on height optimization of natural smoke exhaust shaft under ambient wind

作　　者：李森生[1] LI Sensheng(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《工业安全与环保》2022年第5期49-53,89,共6页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51874213);湖北省重点研发计划(2020BCB072)。

摘　　要：为得到能适应不同环境风的最优自然排烟竖井组高度,采用Fluent软件研究了不同竖井高度(4~8 m)和环境风速(0~9 m/s)对自然排烟竖井组排烟效果的影响。结果表明:当竖井组高度H<6 m时,高温区域随竖井高度的增加而减小,竖井排烟效果随竖井高度的增加而增强;弱环境风的存在可以减小高温区域范围,增强竖井排烟效果。当竖井高度H>6 m时,高温区域随竖井高度的增加而增大,竖井排烟效果随环境风速的增加而增强。当竖井高度H=6 m时,综合排烟效果最好。In order to obtain the optimal height of the natural smoke exhaust shaft group that can adapt to different ambient winds,Fluent software is used to study the effect of different shaft group heights(4-8 metres)and ambient winds(0-9 m/s)on the smoke exhaust effect of natural smoke exhaust shaft group.The results show that when the height of the shaft group H<6 metres,the high-temperature area decreases with the increase of shaft height,and the smoke exhaust effect of shaft increases with the increase of the shaft height;the presence of weak ambient wind can reduce the high-temperature area and enhance the smoke exhaust effect of the shaft.When the height of the shaft is H>6 metres,the high temperature area increases with the height of the shaft,and the smoke exhaust effect of the shaft increases with the increase of the ambient wind speed.When the shaft height H=6 metres,the comprehensive smoke exhaust effect is the best.

关 键 词：自然排烟 环境风 竖井组高度 数值模拟 

分 类 号：U45[建筑科学—桥梁与隧道工程]