SUBSOIL CHARACTERIZATION OF ENGINEERING NEW 1000LT FIELD USING GEOELECTRICAL INVESTIGATION METHOD.

ABSTRACT
The aim of the study is to evaluate the sub-soil conditions and electrical properties of the soil which may can be used to characterize the soil components. With geophysical method fast becoming accepted in the field of civil engineering and geoelectrical methods being one of the widely accepted methods, the various geophysical methods are introduced with their correlating applications in civil engineering.
Wenner-Schlumberger electrode configuration of the electrical resistivity method of geophysical investigation was carried out in faculty of engineering new 1000lt field in order to characterize the subsurface geology in this location. The Petrozenith earth resistivity meter was used to measure the resistance offered by the subsurface in two different locations in this geophysical investigation. Sixty (60) Wenner-Schlumberger soundings were carried out in each transverse. Data were collected and processed using Res2dinv software which produced an inverse model resistivity section which is the true resistivity of the subsurface and this was used to deduce the geological characteristics of the surveyed depth range.
Interpretation of the inverse model resistivity section using knowledge of the geology of the study area and standard electrical resistivity of earth materials available in the literature indicates the presence of clayey sand, lateritic clay, laterite, sand and sandstone as the make-up of the subsurface geology of the study area. Suggestion as to the type of foundation to be used in case of construction was also made to be any form of shallow foundation as there will be no need to design expensive or deep foundations for the soil types encountered.