Pre-Foundation Investigation Using Electrical Resistivity Method: A Case Study of Proposed Phase II, Faculty of Law Building, Federal University Oye-Ekiti, Nigeria

Tokunbo Fagbemigun; Olayiwola Olaseeni; Faith Stephen; Joel Amosun; Jacob Tsado

doi:10.62050/ljsir2024.v2n2.321

المؤلفون

Tokunbo Fagbemigun
tokunbo.fagbemigun@fuoye.edu.ng

Department of Geophysics, Federal University Oye-Ekiti, Nigeria
Olayiwola Olaseeni
Department of Geophysics, Federal University Oye-Ekiti, Nigeria
Faith Stephen
Department of Geophysics, Federal University Oye-Ekiti, Nigeria
Joel Amosun
Department of Geophysics, Federal University Oye-Ekiti, Nigeria
Jacob Tsado
Department of Geophysics, Federal University Oye-Ekiti, Nigeria

الكلمات المفتاحية:

Engineering geophysics , VES , 2-D ERI , Geoelectric section

الملخص

The proposed Phase II, Faculty of Law Building, was investigated to determine the competence of the sub-soil for building construction. The Electrical Resistivity method was employed for the geophysical investigation. The 2-D Electrical Resistivity Imaging (ERI) and Vertical Electrical Sounding (VES) techniques were adopted using the dipole-dipole electrode and Schlumberger arrays respectively. Using an electrode spacing (a) of 5 m and expansion factor (n) varying from 1 – 5, electrical resistivity measurements were taken along two traverses having South – North (SN) and East – West (EW) orientations respectively. Thirteen VES stations were occupied within the study area with half-current electrode spacing (AB/2) ranging from 1 – 65 m. The interpretation of the geophysical data was carried out using DIPRO software. The 2D ERI showed that the sub-soil along traverse 1 and northern part of traverse 2 has high resistivity values (>900 Ωm) at 4.5 m depth. The geoelctric sections identified three geologic layers comprising topsoil, weathered layer and fresh basement. The electrical resistivity results revealed that the sub-soils on or within the proposed site are found to be fairly competent for engineering structure.

Dimensions

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