山岭隧洞群施工通风设计

On ventilation design of tunnel group in plateau area

良好的隧洞作业环境是保证隧洞工程质量、提高施工效率、维护施工者身心健康的重要条件。锦屏二级水电站引水隧洞群水文地质条件复杂,具有高埋深、大洞径、洞线长的特点。独特的施工环境决定了引水隧洞采取钻爆法施工,无轨运输。为改善洞内施工环境,提供引水隧洞的正常施工作业环境,采取压入式通风方案,并通过Fluent软件进行数值模拟,结果显示通风效果良好,为实际工程提供了科学依据。

Good operating environment in tunnel is an important condition to ensure the quality of tunnel, improve the construction efficiency, and maintain the physical and mental health of workers. The diversion tunnel group in Jinping II hydropower station has complicated hydro - geological conditions, and has the features of high depth, large diameter and long lines. The unique construction environment determines to excavate using drill and blast method, trackless transportation. For improving the construction environment inside the tunnels to provide a good working environment for normal excavating, take the program of forced ventilation and use FLUENT to simulate nu- merically. The result demonstrates that the ventilation has a good effect, which could provide a scientific basis for the actual project.