跨孔电阻率CT在岩溶地基勘察中的应用

Application of Cross-hole Resistivity CT Technology in Karst Foundation Prospection

该文通过工程实例,介绍了将钻孔与电阻率CT相结合,进行岩溶情况探测。通过建立模型分析,正反演算及跨孔实测,表明:物探成果与钻探结果吻合很好,基岩面标定准确,纵向溶洞大小和顶底高度探测准确。电阻率CT不仅节省了勘察成本,还避免了钻探以点代面的缺陷。在今后的工作中,可将这两种方法结合起来推广应用。

This paper introduces the drilling and resistivity CT technology is combined to detect the karst condiction through an engineering example. Through the establishment of model analysis, the positive and negative calculus and cross hole measurement, the result shows that ：The geophysical exploration achievements agree well with the drilling results preferably. The bedrock surface calibration is accurate, the vertical size of karst cave and detection of height of top and bottom are accuracy. The resistivity CT not only saves the prospection cost, but also avoids the defect of fan out from a point to an area of drilling. In the future working, the two methods can be combined to promote and apply.