Drilled boreholes, even of rectangular shapes, are rarely of ideal shapes and irregularities in the shaft foundations can affect capacity and design. Using the sonic logging calliper technique, it is employed to verify the verticality, offset as well as actual diameter of bores and depth prior to concreting and to ensure that it complies with the design parameters and depth. ASTM standard D 6167 for the year 2015 may be used as a general guideline only.
The capabilities of this technique exceed by far the physical measurements technique using the conventional mechanical arm equipment.
Menu