Study on Application of Comprehensive Geophysical Prospecting Method in Urban Geological Survey—Taking Concealed Bedrock Detection as an Example in Dingcheng District, Changde City, Hunan Province, China

In order to ascertain the concealed bedrock and its spatial distribution in an urban low-resistance coverage area of a typical lacustrine basin Hunan Province, multi-method comprehensive experimental study was carried out Dingcheng District, Changde City where there are multiple sets strata fault structures. this study, wide-area electromagnetic method microtremor survey were utilized on basis traditional methods, including high-density resistivity controlled-source audio-frequency magnetotelluric method, infer Cambrian limestone, structure, vertical results verified by drilling. The indicate that is effective explore structure geological survey. has obvious effect detection Cretaceous Quaternary silty within 100 m. may provide references for similar projects area.