长距离小洞径隧洞施工中通风方式设计研究

Study on Design of Ventilation Mode in Construction of Long-Distance Tunnel with Small Diameter

结合CFD软件FLUENT,建立隧道通风三维模型,对通风流场进行数值模拟分析,优化巷道式通风流场。研究结果显示,优化后的通风方式可以保证整个隧洞内的风速高于0.5m/s;隧洞中的污染物浓度由280mg/m^(3)降至200mg/m^(3)。研究成果有助于更好地理解循环通风系统的流动模式,改进传统隧道通风技术,提高隧道通风质量,降低隧道通风成本,创造更好的隧道施工环境。

Combined with CFD software FLUENT,a three-dimensional model of tunnel ventilation is established,and the ventilation flow field is numerically simulated and analyzed,and the tunnel ventilation flow field is optimized.The results show that the optimized ventilation mode can ensure that the wind speed in the whole tunnel is higher than 0.5m/s,and the pollutant concentration in the tunnel is reduced from 280mg/m^(3) to 200mg/m^(3).This research can help engineers better understand the flow pattern of circulating ventilation system,improve the traditional tunnel ventilation technology,improve the tunnel ventilation quality,reduce the tunnel ventilation cost and create a better tunnel construction environment.