综合探测技术在公路隧道泥涌灾害治理中的应用

以常吉高速公路小劈流隧道泥涌灾害为例,在综合分析隧道的工程地质情况和泥涌灾害特点基础上,详细探讨了综合探测技术在泥涌灾害治理灾害发生后的探测不良地质灾害超前探测、以及灾害治理后效果检测与评估中的应用。采用TSP 203系统探测的结果与在灾害发生后的地表塌陷处和地面开裂处充电探测结果具有良好的一致性,进而可以准确的圈定泥涌灾害的规模与成因;在该类隧道不良地质体的超前探测中,结合工程地质资料,TSP 203可以较为准确的探测掌子面前方的破碎带、断层、软弱夹层;同时,采用地质雷达方法可以对泥涌灾害处理后的效果进行监测与评价。工程实践表明,综合探测技术手段对于探测不良地质灾害体,指导泥涌灾害预报,检测与评价地质灾害工程处置效果,以及指导隧道施工都具有重要的工程应用价值和现实意义。

Application of Integrated Exploration and Evaluation of Mud-rush Disaster in Road Tunnel

During the construction of highway tunnels under complex geological conditions, various geological disasters are frequently encountered which include roof collapsing, water-bursting, mudbursting, rock-bursts and gas explosion. These disasters not only present difficult tasks for construction, but also cause loss of lives, delay of schedule and economical loses. Therefore how to take reasonable measures to predict, evaluate and prevent these geological disasters is an urgent task in construction of highway tunnels. Through the case study of mud-rush disaster of Xiaopiliu-Tunnel in Changde-Jishou Highway, the paper discusses the application of the integration exploration technology in tunnel mud-rush disaster. It is indicated that the use of TSP203 can explore the scope and cause of mud-rush with results in good agreement with those obtained by electrification method. Combined with the geological information, TSP203 can precisely determine the locations of faults and week rock interfaces ahead of the tunnel face, and also evaluate the effect of mud-rush disasters. This study shows that the available reasonable and effective technologies can detect and predict geological disasters, which will play a important role in tunnel constructions.