GEOPHYSICAL INVESTIGATION FOR POST-FOUNDATION ASSESSMENT WITHIN EKITI STATE UNIVERSITY, ADO EKITI, SOUTHWESTERN NIGERIA

Ilugbo Stephen Olubusola (), Ajayi Christopher Ayodele, Madukwe Henry Yemagu, Adebo Babatunde A, Talabi Abel Ojo, Oyedele Akintunde Akinola, Olufemi Felix Ojo, Ajisafe Yemisi Christianah and Talabi Joseph Ifeoluwa
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Ilugbo Stephen Olubusola: Department of Physics, Lead City University, Ibadan, Nigeria
Ajayi Christopher Ayodele: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria
Madukwe Henry Yemagu: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria
Adebo Babatunde A: Department of Physics, Lead City University, Ibadan, Nigeria
Talabi Abel Ojo: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria
Oyedele Akintunde Akinola: Department of Physics, Ekiti State University, Ado-Ekiti, Nigeria
Olufemi Felix Ojo: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria
Ajisafe Yemisi Christianah: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria
Talabi Joseph Ifeoluwa: Department of Geology, Ekiti State University, Ado-Ekiti, Nigeria

Malaysian Journal of Geosciences (MJG), 2022, vol. 6, issue 2, 88-96

Abstract: This study has evaluated the post-construction subsoil integrity of a distressed building in Ado-Ekiti, Southwestern Nigeria, to decipher the in-situ lithology and structural disposition. Four traverses of 100 m length were established in approximately E-W direction with an inter-station spacing of 10 m. Two Geophysical methods were deployed including the ground magnetic method using Proton Precession Magnetometer and Electrical Resistivity method utilizing 2D Electrical Imaging and Vertical Electrical Sounding (VES) techniques. Twelve (20) VES station points were acquired within the investigated area using Schlumberger configuration which gave relevant information on layer stratification and geoelectric parameters. The obtained results from the VES showed four geo-electric layers comprises topsoil, clayey layer, weathered layer, fractured bedrock, and fresh basement. Low apparent resistivity was delineated from the 2D imaging exhibiting unfit materials at distance between 50 to 75 m and 80 to 100m. The magnetic results showed a series of bedrock ridges and depressions. The integration of results revealed that the majority of the study areas are unsuitable except for central parts which indicate appreciable competence and stability.

Keywords: Foundation failure; differential settlement; VES; Resistivity; 2D Electrical Imaging. (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:zib:zbnmjg:v:6:y:2022:i:2:p:88-96

DOI: 10.26480/mjg.02.2022.88.96

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