斜井交叉隧道施工阶段CO分布规律以及通风优化研究  

Study on CO Distribution Pattern and Ventilation Optimization during the Construction Phase of Inclined Shaft Intersecting Tunnel

作　　者：韦宜霏 崔光耀[1] 党双宝 侯文学 WEI Yifei;CUI Guangyao;DANG Shuangbao;HOU Wenxue(North China University of Technology,Beijing 100144,China;The Fifth Engineering Co.,Ltd.of China Railway Fourteenth Bureau Group Co.,Ltd.,Jining 272100,China)

机构地区：[1]北方工业大学,北京100144 [2]中铁十四局集团第五工程有限公司,山东济宁272100

出　　处：《高速铁路技术》2025年第2期39-45,共7页High Speed Railway Technology

基　　金：国家自然科学基金项目(52178378)。

摘　　要：为降低斜井交叉隧道爆破产生的CO气体对施工的影响,采用计算流体力学探究隧道内风流流场分布和CO气体扩散特征,以三维RNG k-ε湍流非稳态模型和组分运输方程为基础,以风管送风风速、单双工作面通风为影响因素,模拟不同工况下的CO运移特性和浓度分布规律。结果表明,(1)隧道掌子面与出风口沿程方向,以风筒口为分界线,隧道断面的平均风速在掌子面附近达到峰值,随后呈现减小趋势,在风筒口后方风速趋于稳定;(2)单工作面通风时,提升送风风速对CO气体排出有较为显著的效果;(3)双工作面通风时,在斜井出风口两束气流交汇处,容易形成2个明显的涡流。研究成果可为类似隧道工程的施工通风提供参考。To mitigate the impact of CO gas generated by blasting in inclined shaft intersecting tunnels on construction activities,computational fluid dynamics method was employed to investigate the distribution of the airflow field and the diffusion characteristics of CO gas in the tunnel.Based on the three-dimensional RNG k-εturbulence unsteady model and the component transport equation,the study simulated the transport properties and concentration distribution patterns of CO under different working conditions,considering such factors as air supply velocity through ventilation ducts and ventilation configurations with single or double working faces.The results show that:(1)Along the direction from the tunnel face to the outlet,with the ventilation duct outlet as the boundary,the average wind speed within the tunnel cross-section peaks near the tunnel face and subsequently decreases,and stabilizes behind the ventilation duct outlet.(2)When ventilation is provided to a single working face,increasing the air supply velocity has a significant effect on the expulsion of CO gas.(3)During ventilation with double working faces,two distinct vortices tend to form at the intersection of the two airflows at the outlet of the inclined shaft.The findings of this study can provide valuable guidance for ventilation in similar tunnel construction projects.

关 键 词：隧道工程 施工通风 CO分布 数值模拟 单双工作面 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]