Application of high density resistivity method to the exploration of karst cave under roadbed

Abstract

Due to the features of low cost, high efficiency etc, the high density resistivity method is widely used in engineering geological exploration. By laying dense detectors and measuring with many implements assembled, the method can provide abundant geoelectric information which is used for data processing and interpretation. Based on the analysis of electrostatic field theory, this article concludes the geophysical characteristics of the Karst cave, landslide and fracture from the data of the highway geophysical exploration, and provides some ways to improve exploration ability and interpretation precision. The results well proves efficiency of the method in engineering geological exploration.