Depth and extension of the bed rock determination for engineering purposes by electrical resistivity method

Abstract EN

The aim of this research is to support the geophysical field survey results in a manner of vertical electrical sounding (VES) by the results of the engineering examination represented by the Standard Penetration Test (SPT) of some wells drilled in one selected sites near Baghdad province, namely (Al-Musayyib site), for the purpose of evaluating the geometric position of the foundation layer and thus the possibility of the application of electrical method in such Engineering investigations.

Measurements of 25 VES's distributed in five parallel traverses were carried out by using Schlumberger array in which this results were correlated with SPT results and available geological information.

The main outcomes in the study area revealed five continuous and homogeneous subsurface layers in which the fourth layer of very dense brown weakly cemented sand with little amount of gravel having SPT values of more than 50 represents the foundation where engineering construction can be set on it.

Finally, encouraging results about the possibility of the application of electrical method in this situation were obtained.