Geo-Electric Investigation of Sub-soil Competency in Federal University Otuoke Campus in Bayelsa State, Southern Nigeria
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International Journal of Recent Engineering Science (IJRES) |  |
| © 2024 by IJRES Journal | ||
| Volume-11 Issue-5 |
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| Year of Publication : 2024 | ||
| Authors : Oki Austin Oyinkuro, Opukumo Alfred Wilson |
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| DOI : 10.14445/23497157/IJRES-V11I5P109 |
How to Cite?
Oki Austin Oyinkuro, Opukumo Alfred Wilson, "Geo-Electric Investigation of Sub-soil Competency in Federal University Otuoke Campus in Bayelsa State, Southern Nigeria ," International Journal of Recent Engineering Science, vol. 11, no. 5, pp. 96-102, 2024. Crossref, https://doi.org/10.14445/23497157/IJRES-V11I5P109
Abstract
In a bid to investigate the engineering competency of the shallow sub-soil, ten (10) Vertical Electric Sounding (VES) Stations were occupied, and geo-electric data was acquired across the Federal University Otuoke East Campus in Bayelsa State. The data obtained was modelled using IP2WIN resistivity software to obtain information on subsurface geo-electric parameters, layer thickness, and resistivity, which was then used to characterize the shallow geologic material. Results from the ten (10) VES stations investigated revealed four distinct geo-electric trends with results of layer character ranging randomly from incompetent to highly competent; Geo-electric profiles of VES stations 1, 4, 6 and 10 revealed four geologic layers with a trend ρ1> ρ2 <ρ3 <ρ4 associated with the HA-curve type; VES 2 penetrated four geo-electric layers with a trend ρ1> ρ2< ρ3> ρ4 associated with the HK-curve type; VES stations 3, 5, 7 and 8 delineated three subsurface layers with a trend ρ1> ρ2 < ρ3 associated with the H-curve type and VES 9 which revealed 5 distinct geo-electric layers of the QHA curve type with a resistivity trend ρ1> ρ2> ρ3< ρ4 < ρ5. Results showed high variability in the engineering competence of the subsoil across the campus; also, the thicknesses of layers varied, implying that geologic materials were not laterally continuous. Variations observed may be largely due to sub-soil compaction differentials or other anthropogenic and geologic factors across the area. It is highly recommended that foundations for structures and infrastructures on the campus be designed independently due to subsurface inhomogeneity.
Keywords
Competency, Electrical, Otuoke, Resistivity, Sub-soil characterization.
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