Browsing by Author "Momoh, O. L."

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    Exploration of Groundwater within the Mariam Babangida Girls Science Secondary School Minna, NorthCentral Nigeria Using Schlumberger Vertical Electrical Sounding Techniques
    (Journal of Science, Technology, Mathematics and Education (JOSTMED), 2012-08) Momoh, O. L.; Amadi, A. N.; Abdulfatai, I. A.; Omanayin, Y. A.; Onoduku, U. S.; Onah, M.
    A Geoelectrical investigation adopting Schlumberger vertical electrical sounding (VES) have been carried out to explore for groundwater within the premises of Mariam Babangida Girls Science Secondary School, Bosso, Minna, Niger State. This is with a view of to resolve the problem of acute water shortages experienced by the staff and students of the institution. The area lies within the basement rock complex of North Central Nigeria with biotite granite and muscovite granite constituting the main lithological units. The survey was carried out using ABEM SAS 300C Terrameter along five (5) established traverses with 40 m maximum electrode separation. The VES data were analyzed and interpreted through curve matching and the use of Resist software to obtain the geoelectric parameters. These were used in constructing the 1D geoelectric sections and the isopach map. The geoelectric sections revealed the presence of four geo-electric layers namely the top soil, the weathered layer, the partly weathered/fractured bedrock and the resistive bedrock. The contoured depth to bedrock contour map reveals a significant linear feature delineated by the VES as fractures beneath T2V7, T2V8 and T3V9 and is filled with clayey substratum except T3V9 that are characterized by clayey sand materials. T3V9 is therefore recommended for drilling and groundwater development to a depth of about 30 m. however, the groundwater potential of the study area is generally low.
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    Geological factors in civil engineering construction: the perspective of engineering geophysics using case histories from basement complex terrain of Nigeria
    (Journal of Science and today's world, 2013-06) Momoh, O. L.; Olasehinde, P. I.; Amadi, A. N.; Asema, A. I.; Omanayin, Y. A.
    Acknowledged factors of premature failure of most civil engineering construction include poor construction materials, bad design, drainage problems and usage factor. However, the foundation of civil engineering projects and its routes requires pre-knowledge of the subsurface geology that carries the load and hence the need for engineers to have adequate predesigned idea of the subsurface geology. While direct exploratory borehole drill for sample collection and insitu engineering tests are considered ultimate in this respect, the rich opportunities of geophysical tools in giving needed subsurface information cannot be over emphasized due to the combine high speed, relatively cheap and appreciable accuracy of the latter. Therefore, theoretical background of engineering geophysics and case histories from basement complex terrains of Nigeria are presented and discussed with respect to civil engineering constructions. Keywords: geological factors, engineering geophysics, civil engineering construction, basement complex
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    Integrated Geological and Geotechnical Properties of Subsoil for Shallow Foundation Design for M. I. Wushishi Housing Estate, Minna, Niger State, North-Central Nigeria
    (Centre for Human Settlements and Urban Development Journal (CHSUDJ), Federal University of Technology, Minna, Nigeria, 2013-12) Omanayin, Y. A.; Abdullahi, I. N.; Amadi, A. N.; Momoh, O. L.; Abdulfatai, I. A.
    A study of the geological and geotechnical properties of subsoil for shallow foundation design was carried out in the proposed site for the M. I. Wushishi Housing Estate in Minna, Niger State, North-Central Nigeria. The main aim of the research was to ascertain the lithological and structural characteristics of the study area in order to recommend the suitable shallow foundation design for the proposed building construction. The general geological mapping of the area revealed that the area is underlain by three lithologic units: Granite, Gneiss and Schist of Nigerian Basement Complex while the study area is predominantly underlain by Schist rock belonging to the Kushaka Formation. The principal joint direction in the area from rosette diagram is NW-SE. The area is generally low-lying and accessible through Eastern Bye-pass and Maitumbi road. The soil is heterogeneous when correlated laterally from trial pits. Both disturbed and undisturbed soil samples were collected and subjected to laboratory and sieve analysis. The liquid limit ranged from 12.00-37.00 with a mean value of 23.85 while the plastic limit varied from 7.27-30.73 with an average value of 17.17. The plasticity index varies from 1.79 to 15.13 with a mean value of 6.66 while the shrinkage potential ranged from low to medium. The maximum dry density ranged between 1.66-1.95 mg/m3 with the mean value of 1.81 mg/m3 while the optimum moisture content ranged from 8.70-21.37 with an average value of 15.16. The natural moisture content is in the order of 11.52-29.86 % with a mean value of 21.08 %. The particle size distribution curve shows that the area is sand dominated. Based on the field and laboratory results, shallow foundation (pad/strip) can be adopted for lightly loaded structures not exceeding an allowable bearing capacity of 150KN/m2 while deep/pile foundation are advocated for heavily loaded structures. Keywords: Foundation Design, Geological, Geotechnical, M. I. Wushishi Housing Estate, Minna, North-Central Nigeria