超前地质预报在大相岭隧道施工中的应用

深埋长大隧道工程地质条件复杂多变,盲目施工易造成突水、突泥和塌方等安全事故.超前地质预报技术作为隧道勘察结果的进一步详实,在隧道施工减灾、防灾方面发挥着重要的作用.以大相岭隧道为工程背景,针对该隧道复杂的地质条件,采用TGP206超前地质预系统及宏观微观相结合的预报分析方法,可以有效的提高对不良地质体的预报效果,通过预报结果与实际揭露的对比分析,其预测精度达到95%以上,有效地指导了隧道的安全施工,为同类工程提供技术资料和经验借鉴.

Application of geologic prediction ahead in Daxiangling tunnel

The deep buried large tunnel, which is complicated in the geologic condition. The unplanned construction often causes accidents, such as water flush, mud inrush, collapse, etc. Geological prediction is important to prevent disasters. Taking the Daxiangling tunnel as the example, the paper predicts the complex geology in the tunnel by the TGP206 and analyzes the geology at the macro and micro levels. The results show that this way can improve the prediction effect for unfavorable geology and the precision can reach to 95by comparing to the real condition. Then, the way provides a new idea for the safety of the tunnel construction, and technical information and the experience to the similar projects.