综合超前地质预报在壁板坡隧道的应用

Application of Comprehensive Advanced Geological Forecast in Bibanpo Tunnel

针对壁板坡隧道存在多种特殊岩土和不良地质,易引发坍塌、突水、软岩变形等多种地质灾害的实际,提出了一种分级式超前地质预报管理机制。综合采用地质调查法、地震反射法、地质雷达法、红外探测法和超前水平钻法的超前地质预报方法,具有地质与物探相结合、长短距离相结合、物性参数互补的特点,能够比较准确地预报地质条件,减少占用工作面时间,加快施工进度。通过工程实际说明该方法取得较好的预报结果,为该类工程问题提供了有效的技术手段。

In view of the fact that there are many kinds of special rocks and bad geologies in the Bibanpo tunnel,which can easily cause geological disasters like collapse, water inrush, soft rock deformation, this study proposes a hierarchical management mechanism of geological prediction. The comprehensive advanced geological prediction by combining geological analysis, tunnel seismic prediction, ground penetrating radar, infrared detection with advance boreholes has such characteristics as the integration of geology and physical detection, the combination of long and short distance, and the complementarity of physical parameters, which can forecast the geological conditions accurately, reduce the occupation time and speed up the construction progress. The engineering practices show that the method has achieved good results and provided effective technical means for the same engineering problems.