Geophysical Foundation Investigation for Mult-Storey Complexes in Michael Okpara University of Agriculture Umudike:- Eme, Ukoha K.

ABSTRACT

In order to determine the competence ofthe near surface Formation as foundation materials of multi-storey complexes at Michael Okpara University of Agriculture Umudike a Geophysical foundation study was undertaken within the university premises. A total of 14 Vertical Electrical Sounding (VES), using Schlumberger electrode configuration was carried out to determine the nature of the subsurface materials. The geophysical results revealed four distinct geoelectric sequences which comprises of topsoil, weathered layer, medium grained sand and geoelectric basement. The topsoil's composed of sandy clay/ clayey sand/ laterites while the weathered layer composed of clay/sandy clay. The geoelectric section across the study area shows the undulating nature of the basement topography with depth ofrock head between 2 and 21 m. There is no evidence ofgeological feature such as fracture/fault within the basement which can aid subsidence in the area. Based on the results of the survey, the soils within which engineering structures will be founded within the study area are competent in most ofthe areas except few places with low resistivity value.