隧道断层破碎带综合超前地质预报及塌方防治技术

通过分析常用超前地质预报方法的优缺点与适用条件,从长距离与短距离探测相结合的角度,建立“以地质分析为基础,地震波反射法与探地雷达法相结合并利用超前钻探进行验证”的断层破碎带综合超前地质预报体系。在西南某隧道建设中的应用表明,本体系预报结果与开挖结果吻合较好,预报结果较为准确。通过对依托工程内断层破碎带的开挖风险进行评价分析,提出了防治隧道断层破碎带塌方灾害的技术措施,为同类型工程提供参考。

Synthetic Advanced Geological Prediction and Collapse Prevention Technology for Tunnel Fault Fracture Zone

Based on the analysis of the advantages and disadvantages of common advanced geological prediction methods and their application scope,a synthetic advanced geological prediction system for fault fracture zones is established from the perspective of combining long-distance detection with short-distance detection,which integrates “geological analysis as the basis,seismic reflection method with GPR method,and verification by advanced drilling”.Then it is applied to a tunnel construction in southeast China.The results show that the prediction results of the system are in good agreement with the excavation results.Based on the evaluation of the excavation risk of the fault fracture zone in the project,the technical measures to prevent and control the collapse disaster of the fault fracture zone in the tunnel are put forward.This paper could provide a reference for the same type of project.