STUDY ON EXPLORATION FOR TUNNEL BY CSAMT METHOD IN KARST STRONGLY DEVELOPED AREA

There are large areas buried Karst distribution in China. Therefore,it has great significance on engi-neering constructions that launch the geophysical exploration study in limestone karst strongly developed area such as on tunnel projects. CSAMT method is effective to detect lays at required depth for projects. In this paper CSAMT method was applied on a railway tunnel in limestone karst strongly developed area in Guizhou province. The basic theory of CSAMT method was introduced,and the property of data acquisition correspond to actual situation was de-scribed,and then the methods of processing and interpretation on data influenced by terrain effect and static effect were represented. Geological interpretation was made based on the comparison between analyzed original curves and inversion results,combined the geological information of Study area also. Finally,the harmful zone to project are plotted out. Meanwhile,the corresponding recommendations are propounded.