IJG  Vol.4 No.9 , November 2013
Application of Geophysical Methods to Building Foundation Studies
ABSTRACT

A geophysical survey involving the electrical resistivity method utilizing the Vertical Electrical Sounding (VES) and Electrical Imaging Techniques was conducted around the premises of an area within south-western Nigeria with the aim of studying structural defects which may be responsible for future problems and characterizing the soil conditions of the site. A total of 15 VES stations were occupied using Schlumberger Configuration with AB/2 varying from 1 to 65 m. In the electrical imaging, dipole-dipole array was adopted and the two traverses were occupied in the S-N and E-W directions close to where wall cracks and subsurface problems were manifested. Five main geoelectric sequences were delineated within the study area; these include the topsoil (clay and sandy clay), lateritic clay, weathered bedrock (clay, sandy clay and clayey sand), fractured bedrock and fresh basement. A major discontinuity (fracture zone) was discovered along the S-N direction, while a weak zone was also discovered along E-W direction. The result of this research has shown that the causes of the cracks and distress on the walls within the site may have been influenced by the differential settlement resulting from the incompetent subsoil materials and the fractured bedrock on which the foundation of the building was laid.


Cite this paper
F. Ibitoye, F. Ipinmoroti, M. Salami, K. Akinluwade, A. Taiwo and A. Adetunji, "Application of Geophysical Methods to Building Foundation Studies," International Journal of Geosciences, Vol. 4 No. 9, 2013, pp. 1256-1266. doi: 10.4236/ijg.2013.49120.
References
[1]   O. O. Orimoogunje, R. O. Oyinloye and M. Soumah, “Geospatial Mapping of Wetlands Potential in Ilesa, Southwestern Nigeria,” TS 4B-SDI in Municipality and Natural Resources Management, FIG Working Week, 2009.

[2]   J. S. Kayode, P. K. Nyabese and A. O. Adelusi, “Ground Magnetic Study of Ilesa East, Southwestern Nigeria,” African Journal of Environmental Science and Technology, Vol. 4, No. 3, pp. 122-131.

[3]   E. A. Ariyibi, S. L. Folami, B. D. Ako, T. R. Ajayi and A. O. Adelusi, “Application of Principal Component Analysis on Geochemical Data: A Case Study in the Basement Complex of Southern Ilesa Area, Nigeria,” Arabian Journal of Geosciences, Vol. 4, No. 1-2, 2010, pp. 239-247.
http://dx.doi.org/10.1007/s12517-010-0175-5

[4]   A. O. Adelusi, “Multi-Method Geophysical Investigation for Groundwater Study in Southeastern Part of Ilesa Area, Osun State Southewestern Nigeria,” Ph.D. Thesis, Federal University of Technology, Akure, 2005.

[5]   A. B. Adebayo, “Physico-Chemical Characteristics of Groundwater in Two Mining Areas of Contrasting Lithologies in the Ife-Ilesa Schist Belt,” B.Sc. Thesis, Obafemi Awolowo University, Ile-Ife, 2006.

[6]   M. Pirttijarvi, “DCINV: 1-D Interpretation of Electrical (DC) Soundings Software,” Oulu, 2005.

[7]   KIGAM, “DIPRO Version 4.01, Processing and Interpretation Software for Electrical Resistivity Data,” KIGAM, Daejeon, 2001.

 
 
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