oa Civil Engineering = Siviele Ingenieurswese - Geophysical surveys for foundations in South Africa with special reference to the sink-holes in the dolomite south of Pretoria



The Authors mentioned that resistivity measurements should be made in all boreholes drilled for foundation exploration and they added that the resistivity log of a borehole was used to determine variations in porosity or changes in formation with depth. They were asked please to explain how this resistivity log was obtained, and whether these methods could be used above the water table.


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