摘要
根据对苍岭隧道开挖过程中多次发生塌方的地段的工程地质调查的资料,采用现代地质工程的理论,系统地分析了引起苍岭隧道塌方的叠瓦状断裂带的构造特征、力学性质、以及控制该地区主要工程地质特征,重点分析了断层带活动对于隧道周围岩体中的岩石的力学性质所产生的影响,通过对比断层破碎带中及两侧的风化前后岩石的工程力学参数,发现了该隧道可能产生塌方的主要地段的识别标志,并结合现场的实际情况提出了对隧道施工中危险地段岩体加强长、短期地质超前预报工作,通过进行合理的喷浆、结合钢支撑的组合支护方式、控制隧道变形为主的行之有效的防治措施。
Based on the geological data of many collapses in the Cangling highway-tunnel, this paper studies the geological-engineering characters of the imbricate fault in Cangling Tunnel with modern geological-engineering theory and analyses the main characteristics of the imbricate fault including its structure character, mechanics quality, the present tectonic stress field and the pateotectonic stress field, and obtains the identifying symbol of the dangerous rock mass by contrasting the mechanics parameters of the rock in the fault and that of beside fault. And finally, it is advised that the best methods to control the tunnel distortion are the enhanced tong distance geological forecast and short distance geological forecast, the suitable spray -concrete and the appropriate steel trestle.
出处
《石家庄铁道学院学报》
2006年第4期118-121,共4页
Journal of Shijiazhuang Railway Institute
