基于洞内空气质量监测的长大隧道施工通风系统改进

Improvement of Ventilation System during Large-Tunnel Construction Based on Air Quality Testing

通风是长大隧道多工作面施工的重要辅助作业系统,是保证施工人员身体健康与机电设备正常运行的必要条件。通过对沪昆客专壁板坡隧道施工通风第五阶段的通风质量进行现场监测,分析发现隧道内存在工作面供风量不足、工作面风速偏低、粉尘、CO含量偏高等问题,采取增设射流风机和轴流风机、加强对通风设备的管理与维护等措施改善通风系统。实测结果表明,以上措施改善了施工通风效果,提高了隧道内空气质量,但还需要根据监测结果进一步改善通风系统。

Ventilation is an important aided system of the multiple working faces in the long and large tunnel construction, which is the necessary condition to ensure the health of the working staff and the running of elec- tromechanical equipment. By testing air quality of the fifth ventilation stage during Bibanpo tunnel construction in site, this study showed that the short supply of air volume, low speed of wind, and high content of dust and CO were the main problems. Extra jet fan and axial fan were installed and the management and maintenance to the ventilation equipment were reinforced to improve the ventilation system. Measured results showed that those measures improved the effects of ventilation and the air quality during tunnel construction. But further improve- ments are needed according to the results.