Journal of Geology & Geophysics
Open Access

Abstract

The Geoelectrical Evaluation of Subsoil for Building Foundation Design Considerations in Sedimenyary of Ondo State

Ezomo F. O*

The study area is underlain by sedimentary basin of Ondo State, which underlain by the Coastal Alluvium, Coastal Plain sands, Imo Shale group, Upper Coal measures and Nkporo Shale, geophysical investigation was carried out at Irele in Ondo south in Irele local government to determine the structural competence of the subsurface geological strata for building construction and other foundation purposes, using Vertical Electrical Sounding (VES) survey technique of the electrical resistivity method. With a view to investigations the image of the subsurface geology, to characterize the soils in terms of their engineering geological properties in view of determining their suitability for building the foundation and assessing the two methods in determine building foundation requirements in the study areas. Twenty Vertical Electrical Soundings (VES) were quantitatively interpreted using the partial curve matching technique and computer assisted 1-D forward modeling were conducted for the geophysical survey using electrical resistivity method. From the result of the survey, four or five major layers have been established within the study area for building construction purposes and have been recommended for bungalows and other forms of low rising buildings. The cracks on walls of the buildings within them campus have been attributed to either the inability of the engineers to dig the foundation to the required depth or the construction of heavier structures on very weak subsurface layers which triggered off movement.

Published Date: 2024-06-19; Received Date: 2019-11-18