Integrated Geophysical Methods for Post Construction Studies: Case study of Omuo Comprehensive High School, Omuo Ekiti, Southwestern, Nigeria

A.A. Akinlalu

Integrated Geophysical Methods for Post Construction Studies: Case study of Omuo Comprehensive High School, Omuo Ekiti, Southwestern, Nigeria

A.A. Akinlalu * §

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Federal University of Technology

Integrated Geophysical Methods for Post Construction Studies: Case study of Omuo Comprehensive High School, Omuo Ekiti, Southwestern, Nigeria

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Abstract

An integrated geophysical survey was carried out within the Precambrian Basement Complex of Omuo Comprehensive High School and its environ in Omuo-Ekiti, Ekiti State, South-west Nigeria to assess buildings in the area that are intensively affected by cracks resulting in structural instability. The geophysical methods adopted for the investigation are the Very Low Frequency Electromagnetic (VLF-EM), Magnetic, 2-D electrical resistivity profiling using the dipole-dipole array and Vertical Electrical Soundings (VES) using the Schlumberger array. The traverses were established E -W direction cutting across geologic strike. A total of five traverses were established with length ranging from 130 -200m and of varying inter-traverse spacing. The station interval is 10m. Also, a total of thirty-five (35) VES stations were occupied covering the entire study area. The acquired data were processed and interpreted integrally to elucidate the shallow subsurface geology of the study area. The results were qualitatively and quantitatively interpreted and are presented as sounding curves and geo-electric sections. The magnetic interpretation shows relatively uneven bedrock topography with variable overburden thicknesses of between 5m -15m. However, the VLF-EM results reveal ten (10) conductive zones which manifest as low resistivity zones in the generated geo-electric sections. The characteristic sounding curves obtained from the study area are H, HA, KH, HK, KHK, HAK and QH.

References

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

A.A. Akinlalu. 2014. "Integrated Geophysical Methods for Post Construction Studies: Case study of Omuo Comprehensive High School, Omuo Ekiti, Southwestern, Nigeria". Global Journal of Science Frontier Research - H: Environment & Environmental geology GJSFR-H Volume 14 (GJSFR Volume 14 Issue H1).

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GJSFR Volume 14 Issue H1

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Journal Specifications

Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

Keywords

incompetent materials lateral inhomogeneity structural instability

Classification

GJSFR-H Classification FOR Code: 040499p

Submission ReceivedFebruary 18, 2014
Peer Review Double Blind
Handling Editor
Accepted March 10, 2014
Published March 20, 2014

Version of record

v1.2

Issue date

April 28, 2014

Language

English

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Total Score: 147

Country: Nigeria

Subject: Global Journal of Science Frontier Research

Authors: A.O. Adelusi, A.A. Akinlalu, B .W. Daramola (PhD/Dr. count: 0)

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