فهرست نشریات علمی دسترسی آزاد ایران

Collecting geotechnical information of subsurface formations is very important in creating water transfer structures and digging tunnels. Knowing the quality of rock structures in this regard can be done with the help of using geoelectric techniques. In order to determine the different subsurface geological structures and the quality of the granite rocks, the apparent resistivity data were collected by Vertical Electric Sounding (VES) method with the Schlumberger array in Glass area, located in the northwest of Iran. By performing two-dimensional inversion of the data using the Res2DInv software, tomograms of resistivity values distributed along each profile are constructed. Then, the obtained geoelectric sections are interpreted by means of geological and boreholes information to delineate the different rock structures in the study area. The study area includes all the weathering grades of formations from sandy soil to fresh rock. The results of the tests conducted on the samples taken from the boreholes drilled in the study area serve as a direct check for the results of the resistivity measurements interpretation. Interpretation results can provide an evaluation of the advantages and limitations of the geophysical method used. They also can depict a structural model of subsurface rock masses, showing the relationship between physical properties and geotechnical parameters like Rock Quality Designation (RQD) and the degree of weathering. In the geoelectric sections, resistivity variations in both vertical and horizontal directions are linked to different geological structures and discontinuities. The quality of granite rock masses, in terms of compaction or weathering, is assessed by analyzing resistivity values within the geoelectric sections. These findings on the quality of granite rock masses are compared and validated against borehole sample test results.