交通节能与环保2026，Vol.22Issue(2)：28-33,6.DOI:10.3969/j.issn.1673-6478.2026.02.006
特长公路隧道压入式和巷道式通风有害气体扩散规律研究
Study on Diffusion Patterns of Harmful Gases in Forced Ventilation and Gallery Ventilation in Extra-long Highway Tunnels
摘要
Abstract
To investigate the impact of different construction ventilation schemes on harmful gases diffusion in extra-long highway tunnels,this study is based on the Daliangshan No.1 Extra-Long Highway Tunnel a critical project along the Leshan-Xichang Expressway in Sichuan Province.Based on the species transport model in the computational fluid dynamics(CFD)software Fluent,numerical simulation models are established for forced ventilation in the main tunnel and pilot tunnel,as well as for coordinated gallery ventilation.The models reveal the spatiotemporal distribution patterns and dispersion mechanisms of harmful gases under both ventilation modes,and examine the spatiotemporal effects of transitioning between construction ventilation schemes on gas diffusion.The results indicate that during tunnel construction ventilation,jet zones,recirculation zones,and vortex zones are present in the fluid domains of both the main tunnel and pilot tunnel,with jet zones exhibiting lower gas concentrations,recirculation zones maintaining relatively uniform gas distributions,and vortex zones demonstrating gradient variations in gas concentration.Gas accumulation is observed at the arch foot of the tunnel face and in the area beneath ventilation ducts near the tunnel floor.During forced ventilation,both the spatial extent of the high-concentration gas zone ahead of the pilot tunnel face and the gas concentration levels at its floor level exceed those observed in the main tunnel.In contrast,gallery ventilation significantly reduces the extent of high-concentration gas zones ahead of the faces in both the main and pilot tunnels,while simultaneously enhancing construction ventilation efficiency and reducing energy consumption.关键词
特长公路隧道/压入式通风/巷道式通风/有害气体扩散/计算流体力学Key words
extra-long highway tunnel/forced ventilation/gallery ventilation/harmful gases diffusion/computational fluid dynamics分类
交通工程引用本文复制引用
兰富安,蔡汶呈,寇小敏,李博涵,范文昊,王志杰..特长公路隧道压入式和巷道式通风有害气体扩散规律研究[J].交通节能与环保,2026,22(2):28-33,6.基金项目
四川省交通运输科技项目(2021-ZL-15) （2021-ZL-15）
国家自然科学基金项目(52278417) （52278417）
