2D Electrical Resistivity Imaging (ERI) for Subsurface Evaluation of a Pre-engineering Construction Site in Akure, Southwestern Nigeria
International Journal of Environmental Monitoring and Analysis
Volume 8, Issue 2, April 2020, Pages: 33-44
Received: Aug. 21, 2019;
Accepted: Sep. 10, 2019;
Published: May 28, 2020
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Alagbe Olufemi Adigun, Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria
Faleye Oluseye Emmanuel, Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria
2D electrical resistivity imaging (ERI) and vertical electrical sounding (VES) were integrated to map the subsurface lithology at a pre-engineering construction site in Akure, southwestern Nigeria, in order to ascertain the competence and suitability of the site for engineering structures. Four 2D horizontal profiling (Wenner array) was used to qualitatively study and interprete the geoinformation of the lithological nature of each geoelectric layer within the study site. Four vertical electrical sounding were also conducted using Schlunberger configuration. The VES data were processed and inverted using master curves and WinResist computer software, while the 2D inversion was done using Diprowin. The results of the 2D horizontal profiling revealed that the study area is composed of four subsurface geo-electric layers with resistivities ranging between 6.91Ωm to 93.6Ωm. These results revealed an expansive clay formation to the depth probed. While the VES results showed a three subsurface geo-electric layers with resistivities ranging between 8.4Ωm to 640Ωm with the second layers where the foundation is supposed to be laid confirmed the presence of clay with resistivities ranging between 8.4Ωm to 13.0Ωm with depth ranging between 4.9m to 7.9m. The results revealed the site to be an expansive clay formation and showed that shallow foundation may not be feasible or advisable for massive engineering structures because of the presence of clay materials in the area. But small or light engineering structures may be recommended.
Alagbe Olufemi Adigun,
Faleye Oluseye Emmanuel,
2D Electrical Resistivity Imaging (ERI) for Subsurface Evaluation of a Pre-engineering Construction Site in Akure, Southwestern Nigeria, International Journal of Environmental Monitoring and Analysis.
Vol. 8, No. 2,
2020, pp. 33-44.
Ogumgbe, A. S., Balogun, A. R., Umar, A. A and Adejo, O. A. (2017): Site Characterization Using Electrical Resistivity Methods: A Case Study of Iba Nursery/Primary School, Ojo, Southwest, Nigeria. Journal of Scientific Research & Reports, Vol.13 No.1 Pp1-16.
Aderoju, A. A., and Adebayo, O. O. (2015): Geophysical Investigation for Foundation Studies at Ogudu River Valley Estate, Lagos, Southwestern, Nigeria. The pacific Journal of Science and Technology. Vol.15, No.1, Pp295-304.
Iwueze E. S. (2018): Subsoil Characterization For Construction Purpose Using Integrated Geophysical Methods. Unpublish M. Tech. seminal paper submitted to the Department of Applied Geophysics, Federal University of Technology, Akure, Nigeria.
Tigistu, H. and Alemayehu, A. (2014): Resistivity Tomography and Magnetic Surveys: applications For Building Site Characterization at Gubre, Wolkite University Site, western Ethiopia. SINET: Ethiop. J. Sci., 37 (1): 13-30.
Cyril, C. O. “2D Resistivity imaging and Geotechnical investigation of structural collapsed Lecture Theatre in Adekunle Ajasin University, Akungba-Akoko, Southwestern, Nigeria”. Environmental Research, Engineering and Management, No. 3 (69), pp. 49-59, 2014.
Nordiana, N. M., Bery, A. A., Taquiddin, Z. M., Jinmin, M. and Abri, I A. (2018): 2-D Electrical Resistivity Tomography (ERT) assessment of Ground Failure in Urban area. Journal of Physics: Conf. series 995, (012076). Doi: 10.1088/1742-6596/995/1/012076, Pp1-8.
Bayowa, O. G. and Olayiwola, N. S. (2015): “Electrical resistivity investigation for Topsoil Thickness, Competence and Corrosivity Evaluation: A case study from Ladoke Akintola University of Technology, Ogbomoso, Nigeria”. 2015 2nd International Conference on Geological and Civil engineering. IPCBEE Vol.80 (2015) LACSIT press, Singapore. DOI: 10.7763/IPCBEE, 2015.v80.11.
Ayolabi, E. A., Folorunso, A. F. and Jegede, O. E. (2012): An application of 2D Electrical Resistivity Tomography in Geotechnical Investigations of Foundation Defects. A case Study. Journal of Geology and Mining Research. Vol.3 (12) Pp. 142-151.
Sunmonu, L. A., Alagbe, O. A., Mabunmi, S. A., Adeniji, A. A. and Olasunkanmi, N. K. (2013): Geophysical Investigation into the Cause (s) of Structural Failure within Bacosa and Faculty of Science Buildings, Bowen University Temporary site, Iwo. Advances in Physics Theories and applications. Vol.25, Pp1-17.
Alagbe, O. A., Sanusi, S. O. and Bamigboye, A. A: (2019): 2D Electrical Resistivity Prospecting for Groundwater at the Premises of the Staff Quarters of Elizade University, Ilara Mokin, Ondo state Nigeria. World Journal of Innovative Research (WJIR). Volume 6, Issue 2, Pp 100-108.
Alagbe, O. A. (2018): 2D Geoelectrical Resistivity Imaging for the Assessment of Subsurface Soil Corrosivity Zones at a Proposed Filling Station Site in Akure Southwestern Nigeria. International Advanced Research Journal in Science, Engineering and Technology. Vol. 5, Issue 11.
Falae, P. O. (2014): Application of Electrical Resistivity in Buildings Foundation Investigation in Ibese Southwestern Nigeria. Asia Pacific Journal of Energy and Environment, Vol.1, No.2, PP95-107.
Rungroj, A. and Mark, E. E. (2015): Application of 2D Electrical resistivity Tomography to Engineering Projects: Three Case Studies. Songklanakarin J. Sci. Technol. 37 (6), 675-681.
Rahman, M. A. 1976. Review of the basement geology of southwestern Nigeria. In C. A. Kogbe (Editor). In Geology of Nigeria (pp 41-58). Lagos: Elizabethan publishing Co.
Adeyemo, I. A., Akande, V. D., Ajayi-Gidi, O. and Aremo, F. O. (2015): Geophysical Investigation of Impact of Geologic Structure on Preferred Percolating Paths of an Oil-based Leachate within a Migmatite-Gneiss Environment: A Case Study of Federal University of Technology, Akure Campus Nigeria. Journal of Environment and Earth Sciences. Vol.5, No.14, Pp65-75.