ELECTRICAL CHARACTERIZATION OF THE SUBSURFACE SOIL USING ELECTRICAL RESISTIVITY TOMOGRAPHY FOR FOUNDATION STUDIES AT AHMADU BELLO UNIVERSITY PHASE II, ZARIA, NIGERIA

Lukman Adesina Olayinka, L. A. Ahmed, M. K. Lawal, A. Aliyu, E. Idogbe, B. Ahmed, M. U. Tybo

Abstract


Electrical resistivity tomography is a geophysical method that was used to characterize the soil in Ahamdu Bello University Phase II, Zaria. Ahmadu Bello University site II lies between longitudes 7° 37.98' E and 7° 39.07' E and latitudes 11° 7.86' N and 11° 8.50' N. A multi-electrode resistivity meter (ABEM Terrameter SAS 4000) was used for data acquisition on the field using a dipole-dipole array and the data were processed and interpreted using RES2DINV. The results obtained from the resistivity tomograms of the three profiles were used to correlate with the borehole data and the correlation indicates four distinct layers (Topsoil, weathered basement, fractured and fresh basement). The most competent layer for building a foundation in the study area is the fresh basement which is about 15.9m deep from the earth surface. In this study, electrical resistivity tomography has been successfully used to determine the depth to basement and the extent to which the bedrock was delineated. Weak zones that may be prone to subsidence and the competent areas that can support massive engineering were identified

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References


Arjwech R. and Everett M. E., (2015). Application of 2D electrical resistivity tomography to engineering projects: Three case studies. Songklanakarin J. Sci. Technol., 37 (6), pp.675-681.

Castilho, G. and Maia, D., (2008). A successful mixed land underwater 3D resistivity survey in an extremely challenging environment in Amazônia. 21th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, pp.1150-1158.

Garba, M.L., Yusuf Y.O., Arabi, A.S., Musa, S.K. and Schoeneich, K. (2014). An Update on the quality of water in Samaru Stream, Zaria, Nigeria. Zaria Geographer, vol. 21, No. 1.

Gómez-Ortiz, D., and Martín-Crespo, T. (2012). Assessing the risk of subsidence of a sinkhole collapse using ground-penetrating radar and electrical resistivity tomography. Engineering Geology, pp.149–150, pp.1–12.

Hydro Skill and Engineering Services, Kaduna, (2005). Files on Borehole Records in Ahmadu Bello University, Zaria, Nigeria. Estate Department, A.B.U., Zaria.

Loke, M. H., Chambers, J. E., Rucker, D. F., Kuras, O. and Wilkinson, P. B. (2013). Recent developments in the direct-current geoelectrical imaging method, Journal of Applied Geophysics, 95, pp.135-156.

Loke, M.H. (2000). Electrical imaging surveys for environmental and engineering studies; A practical guide to 2-D and 3-D surveys. Electronic version available from http:// www.terraplus.com.

McCurry, P. (1970). The Geology of Zaria Sheet 21. Unpublished M.Sc. Thesis, Department of Geology, Ahmadu Bello University, Zaria.

Sani, G. (2018). Application of 2D Electrical Resistivity Method for Foundation Studies in Part of Federal University Gusau, Nigeria. Unpublished M.Sc. Thesis. Dept. of Physics, Ahmadu Bello University: Zaria, Nigeria.

Wright, J.B., and McCurry, P. (1970). “The geology of Nigeria Sheet 102 SW, Zaria and its regions. Edited by M. J. Mortimore. Department of Geography, Occasional paper, No. 4, Ahmadu Bello University, Zaria.


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