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Geophysical investigation into the integrity of a reclaimed open dumpsite for civil engineering purpose

Adagunodo, T. A. and Adetunji, A. A. and Erinle, A.V. and Akinwumi, S. A. and Adewoyin, O.O and Joel, E. S. and Kayode, O.T (2017) Geophysical investigation into the integrity of a reclaimed open dumpsite for civil engineering purpose. Inteciencia Journal, 42 (11). pp. 324-339. ISSN 0378-1844

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Structural failure is one of the concerns of earth scientists in the in the recent time. Most of the building engineers neglect investigation into the subsurface structure prior to construction without taking into cognizance the soil type and its variation which is one of the contributing factors to frequent building collapse in this era. Integrated geophysical methods involving ground magnetic, Very Low Frequency-Electromagnetic (VLF-EM) and Vertical Electrical Sounding (VES) were adopted with a view to investigating into the integrity of a reclaimed open dumpsite in Oyo for civil engineering worthiness. Three (3) traverses were occupied for ground magnetic and VLF-EM survey. A total length of 100 m was occupied in each traverse along E-W orientation with inter-station spacing of 10 m. Six (6) VES stations were occupied along two geoelectric profiles in the study area. The ground magnetic study showed magnetic highs and lows both on the profiles and the generated 2-D map. The magnetic highs are competent zones for civil engineering construction while magnetic lows are incompetent zones. The VLF result revealed conductive and non-conductive zones. More than half of the area of study is characterized with conductive signatures. Conductive zones are regarded as the incompetent zones while the non-conductive zones are regarded as competent zones. The VES result showed that the five out of six VES points occupied are underlain with fractured bedrock while only VES 3 showed fresh bedrock. It is concluded that the study area unsuitable for the construction of giant structures

Item Type: Article
Uncontrolled Keywords: Subsurface integrity, Civil engineering purpose, Reclaimed open dumpsite, Ground magnetic, Very low frequency – electromagnetic, Electrical resistivity
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Engineering, Science and Mathematics > School of Physics
Depositing User: Mrs Hannah Akinwumi
Date Deposited: 23 Jan 2018 10:46
Last Modified: 23 Jan 2018 10:46

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