中文摘要：

灰岩地区岩溶普遍发育，所产生的溶蚀带、溶洞等不良地质现象，会严重地影响到高速公路路基工程质量与施工进度。高密度电法集电测深和电剖面装置于一体，由于它具有采集信息多，数据量大，观测精度高速度快和探测深度较大等特点，因而在工程地质和水文地质勘查中广泛应用。本文将高密度电法应用于云南某高速公路的岩溶勘察中，取得了很好的效果，为路基施工及岩溶的勘察治理提供了地球物理依据。

英文摘要：

With the wide development of the karsts in limestone region, the bad geological phenomenon such as the dissolution belt and karst cave bring a very bad effect to the engi- neering quality of the highway. Then the multi--electrode electric method which synthesizes electric sounding and electric cross section has been widely used in engineering and hydrologic geology prospecting, because of its characteristics of fast and large acquisition, high precision, andagreat depth of detecting. In this paper, we apply this method in the karst exploration of a highway in Yunnan, and obtain good results. It provides the geophysical basis for the construction of roadbed and the reconnaissance and harnessing of karst.