摘要
为解决传统管道式通风在隧道大角度弯折处有较大局部阻力与风力损失的弊端,文章以玉磨铁路安定隧道为工程背景,通过数值模拟的方法,设计了隧道施工风仓式通风系统。采用控制变量法,以风机效率、风压全压和风仓内风流的平顺度作为依据,确定了最优的风仓尺寸。计算结果表明,配备4台SDF No 12.5轴流风机为隧道各掌子面供风的情况下,风仓尺寸长度为18 m、高度4.5 m、风机中心间距8 m时,风机通风效率较高,风仓所需材料少,较经济实用,四台风机风压均衡,风机协调性好,风仓内风流场较均匀稳定。
In order to deal with the disadvantages of large local resistance and wind loss in the large-angle bends of the tunnel with traditional ducted ventilation,taking the An′ding tunnel on Yumo railway as the engineering background,an air cabin ventilation system for tunnel construction is designed by the method of numerical simula⁃tion.Based on the fan efficiency,total wind pressure and the smoothness of the air flow in the air cabin,the optimal dimension of air cabin is determined by using controlled variable method.The calculation results show that the ven⁃tilation efficiency is high,the air cabin requires less material which is more economical and practical,the air pres⁃sure of the four fans is balanced,the fans are well coordinated,and the air flow field in the air cabin is uniform and stable when four SDF No.12.5 axial fans are equipped to supply air to each working face of the tunnel and the di⁃mensions of the air cabin is 18 m long and 4.5 m high and the space between fan centers is 8 m.
作者
宋骏修
弯晓林
郭春
SONG Junxiu;WAN Xiaolin;GUO Chun(MOE Key Laboratory of Transportation Tunnel Engineering,Southwest Jiaotong University,Chengdu 610031;China Railway 19th Bureau Group Second Engineering Co.,Ltd,Shengyang 111000)
出处
《现代隧道技术》
EI
CSCD
北大核心
2020年第5期232-238,共7页
Modern Tunnelling Technology
基金
“十三五”国家重点研发计划(2019YFC0605104)
四川省教育科研资助金项目(2018495)
成都哲学社会科学规划项目(2019CS107)
成都市科技项目(2019-YFYF-00121-SN).
关键词
隧道施工通风
数值模拟
风仓
控制变量法
Tunnel construction ventilation
Numerical simulation
Air cabin
Controlled variable method
