摘要
多斜井长大隧洞贯通后,由于隧洞距离长、隧洞周围气象条件比较复杂,产生的自然风会对隧洞内的施工通风产生较大影响。为了研究自然风对施工通风的影响,本文基于流体力学原理,分析了自然风的成因和主要影响因素,以及多斜井贯通后的自然风计算方法。并以引汉济渭岭北段5#~7#斜井工区为工程依托进行了计算分析。研究结果表明:自然风压主要受热位压差和超静压差影响;在多斜井贯通后的隧洞内,需考虑自然风对施工排风的影响,结合整个施工通风系统的回风风阻对施工通风设计进行考虑。
After breakthrough of a long tunnel with multiple inclined shafts,natural wind exerts a great influence on the construction ventilation in the tunnel,because of the long distance of the tunnel and the complicated meteorological conditions.In order to study the influence of natural wind on the construction ventilation,this paper analyzed the causes and main factors of natural wind based on the principle of fluid mechanics,and the calculation method of natural wind after breakthrough of multi-inclined shafts.The results show that the natural wind pressure is mainly affected by the thermal head pressure and the excess differential static pressure.In the tunnel with multiinclined shafts,the influence of natural wind on construction ventilation should be considered,and the design of construction ventilation should be combined with the return air resistance of the whole construction ventilation system.
作者
王晓亮
舒东利
王明年
田源
董宇苍
于丽
WANG Xiaoliang;SHU Dongli;WANG Mingnian;TIAN Yuan;DONG Yucang;YU Li(China Railway Eryuan Engineering Group Co.,Ltd,Chengdu 610031;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031;Key Laboratory of Transportation Tunnel Engineering,Ministy of Education,Southwest Jiaotong University,Chengdu 610031)
出处
《现代隧道技术》
EI
CSCD
北大核心
2019年第S02期494-499,共6页
Modern Tunnelling Technology
基金
国家自然科学基金项目(51308472)
陕西省科技统筹创新工程计划(2013KTZB03-01-02)
关键词
引水隧洞
施工通风
理论分析
自然风
引汉济渭
Water diversion tunnel
Construction ventilation
Theoretical analysis
Natural wind
Water diversion from the Han river to the Wei river
