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在柳州某大厦的地基调查和桂林某地下水勘测中，使用了联合三极电阻率测深。用对称四极电阻率测深拟断面图和一维反演方法解释很难分辨覆盖层中局部低阻体引起的异常与基岩破碎或溶洞引起的异常。使用λ比值，很容易地确定了低阻体的空间位置，解决了地质问题。
In a ground investigation of a building in Liuzhou and a groundwater survey in Guilin, a combined three-pole resistivity sounding was used. It is difficult to distinguish the anomaly caused by the local low resistivity body and the bedrock crushing or karst cave anomalies caused by the symmetrical quadrupole resistivity sounding and the one-dimensional inversion method. Using the λ ratio, it is easy to determine the spatial location of the low-resistivity body and solve the geological problem.