高密度电法应用于隧道地质超前预报的方法研究

Application of High- density Resistivity Method in Advanced Geological Forecast of Tunnels

为了准确预报隧道掌子面前方施工过程中富水带、软弱层、断层和破碎带等地质结构的具体位置和宽度,采用高密度电法方法进行预测。通过预测结果和实际开挖的地质情况进行比较,结果发现:高密度电法预测的地质结构与实际地质状况基本一致。实践证明:高密度电法具有成本低、效率高、勘察距离长、效果明显等优点,是隧道地质超前预报行之有效的方法之一。

In order to accurately forecast the location and width of geologic structures like groundwater enriched zone, weak layer and fault fracture zone before the tunnel face in the process of construction, the high density resistivity method has been used to make the forecast. The prediction results and the practical geological situation of the excavatio nare found closely consistent in comparison. Prac- tice proves the high density resistivity method one of the effective methods for advanced geological prediction of tunnels owning to its ad- vantages of low cost. high efficiency, long exploration distance and obvious effects.