京张高铁正盘台隧道施工通风方案研究

Study on the Scheme of Construction Ventilation in Zhengpantai Tunnel of Beijing-Zhangjiakou High-speed Railway

正盘台隧道施工过程受工期紧张、大规模涌水、文物保护、生态保护等因素影响,需要设置泄水洞、支洞、横通道等辅助坑道,施工工作面增加较多,对隧道的施工通风提出更高的要求。根据现有辅助坑道条件,结合施工组织各阶段特点,通过理论计算及现场施工组织配合,研究和制定出正盘台隧道符合现场实际条件的施工通风最佳方案,实现隧道施工人员工作环境的极大改善。

Due to the influence of the limited construction period,severe water inflow,protection of cultural relic,ecological protection and so on,it is necessary to set up the drainage hole,branch tunnel and cross passage in Zhengpantai Tunnel.The increase of working face puts forward higher requirements for tunnel construction ventilation.According to the service gallery conditions and in view of the characteristics of construction organization,this paper studies and formulates the optimal ventilation program through theoretical calculation and site construction organization to greatly improve the working environment of workers.