Study of integrated survey method for concealed layer occurrence
In order to study the integrated survey method of concealed layer occurrence,taking the dam site of Yangxi Hydraulic Complex as example,in view of the difficulties of Nantuo Formation at the dam site such as unde-veloped bedding,developed cleavage and joint,complex weathering,integrated survey method was adopted consist-ing of engineering geological mapping,drilling,borehole television,adit and shaft.On the basis of identifying all structural planes and regional structures,3D modeling and surface generalization of the marker layer were conduct-ed.According to the development and extending length of structural planes,the occurrence comparison of regional structures,layers and joints were identified,and the occurrence of Nantuo Formation at the dam site of Yangxi Hy-draulic Complex were identified to be N12～19°E,SE∠32～45°.
concealed layer occurrenceintegrated survey methodNantuo Formationdam site of Yangxi Hydraulic Complex
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