综合超前地质预报技术在隧道断层破碎带中的应用

Application of Comprehensive Advance Geological Prediction Technology in Tunnel Fault Fracture Zone Prediction

高速铁路隧道施工穿越的地层复杂多样。开挖过程中,不间断揭露溶洞、断层、软弱夹层及节理裂隙密集带等地质异常区域,断层附近易发生涌水突泥、塌方等地质灾害。为解决前期勘察阶段难以准确判定断层破碎带位置的问题,文中采用地质分析法、物探法、超前水平钻探等多种手段,对渝昆高铁格莱村隧道F1大型断层破碎带进行探测,预报结果和现场开挖揭露情况基本吻合,可为类似施工隧道穿越断层破碎带提供参考。

During the construction of high-speed railway tunnels,the strata that pass through are complex and diverse.During the excavation process,geological abnormal areas such as karst caves,faults,weak intercalations and joint and fissure dense zones are continuously exposed,and geological disasters such as water inrush,mud inrush and collapse are prone to occur near the faults.In order to solve the problem that it is difficult to accurately determine the location of the fault fracture zone at the early stage of the survey,the paper uses geological analysis,geophysical prospecting,advanced horizontal drilling and other comprehensive prediction methods to detect the large fault fracture zone of the Gelai Village Tunnel F1 of the Chongqing-Kunming High-speed Railway.The prediction results are basically consistent with the actual excavation and exposure on the site,which can provide a reference for similar construction tunnels to cross the fault fracture zone.