Assessment of Geologic Effect of Road Submergence Depths on Soil Subgrade Strength in Eket, South-South Nigeria

Mfoniso U. Aka; Okechukwu E. Agbasi; Okonna Nsidibe Ndaraka; Osu Azuanamibebi Derikuma

doi:10.18535/ijsrm/v10i6.g1

Abstract

Road submergence is a common occurrence in Eket, South-South Nigeria, resulting in massive outlays for road construction and alimony. Fundamentally, the delineation of roadway structures is based on the strength of consolidated soil avowed as the subgrade. Consequently, the subgrade is the in situ material upon which the roadway structure is placed. It is necessary to know the modes of damage to roads caused by submergence. This study assesses the effect of road submergence depths and the extent of submergences on the subgrade strength of soil samples carried out on the Uquo Eket road that was intensely defective by the deluge. Coherent and frictional soil material types were tested for California Bearing ratio (CBR), mechanical analysis, Atterberg limit determination, and moisture density tests, respectively. CBR tests were done at various elevations of submersion, including common drenching limit, elongated deluge, and resoluteness of its suitability. Atterberg limit determination and mechanical analysis tests categorized and determined the applicability of studious soil as subgrade substantial. For elongated duration deluges, the depth and extent of submergence of subgrade strength show a lower value. Moreover, mechanical and Atterberg limit determination tests indicate a rapid and high-resolution occurrence of delegation for the elongated duration.

References

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[refR-1] Adebayo, W. O. (1987) “Spatial Analysis of Stream Floods and Hazards in an Urbanized Environment. A Case Study of Ado – Ekiti”. An Unpublished B.Sc Dissertation, Geography Department, Ondo State University, Ado – Ekiti.Google Scholar ↗

[refR-2] Adebayo, W. O. (2005) “The Menace of Soil Erosion on the Landscape of Ekiti State and the Necessary Remedial Measures, Journal of Contemporary Studies and Research. Vol. 2. N0. 1 pp. 131 – 143.Google Scholar ↗

[refR-3] Adedeji, A. A. and Salami A. W., (2008): Environmental hazard: Flooding and Its Effects on Residential Buildings in Ilorin, Nigeria. http://www.scribd.com/doc/9268022/ Date Accessed Jan 29 2015.Google Scholar ↗

[refR-4] Adeleke, B. O. (1978) “Urban and Rural Development in Nigeria”. Lagos, Heinemann Press.Google Scholar ↗

[refR-5] Afolabi, F. I. (2005) “A Critical Assessment of Environmental Problems in Ondo State. Selected examples and the Way Forward”. An Environmental Sensitization Workshop Organised by the Ondo State Government. Ministry of Special Duties (Department of Environment and Mineral Resources, Akure).Google Scholar ↗

[refR-6] Ayoade J. O. and Akintola, F.O. (1980) “Public Perception of Flood Hazards in Two Nigeria Cities”. Environmental Interaction Pergamon Press. Volume 4, No ", pp. 8 – 10Google Scholar ↗

[refR-7] Bernama (2009): RM 21 Juta Untuk Baiki Jalan Rosak Akibat Banjir. Bernama.Com. December 22, 2009.Google Scholar ↗

[refR-8] Bowoputro, H. et al. (2009): Temperature Influence and Lapindo Mud Submersion towards the Stability Value of Asphaltic Concrete Mix, Rekayasa Sipil Journal, Volume 3, No.3 1978 – 5658.Google Scholar ↗

[refR-9] Deshpande, V. P., Damnjanovic, I., and Gardoni, P. (2008): Modeling the Effects of Rehabilitation Actions on The Reliability of Flexible Pavements, Proc., Transportation Research Record 87th Annual Meeting, Transportation Research Board,Washington, D.C.Google Scholar ↗

[refR-10] Fairweather, H. and Yeaman, J. (2014). “A study of the parameters affecting the performance of roads under extreme rainfall event”. Int. J. of GEOMATE, Sept., 2014, Vol. 7, No. 1 (Sl. No. 13), pp.955-960.Google Scholar ↗

[refR-11] Khogeli, W. E. I. and Mohamed, E. H. H. (2004): Novel Approach for Characterization of Unbound Materials. Journal of the Transportation Research Board, No. 1874, Washington, D.C., 38-46.Google Scholar ↗

[refR-12] Hossain M.S and Davis C.G. (2007) A GIS to Redqce Flood Impact on Road Transportation Systems. Bangladesh University.Google Scholar ↗

[refR-13] Naagesh, S., Sathyamurthy, R., Sudhanva, S. (2013): Laboratory Studies On Strength and International Journal of GEOMATE, May, 2016, Vol. 10, Issue 21, pp. 1848-1853 1853 Bearing Capacity Of GSB-Soil Sub-Grade Composites.Google Scholar ↗

[refR-14] Tarefder, R. A., Saha, N., Hall, J. W., and Ng, P. T. T. (2008): Evaluating weak subgrade for pavement design and performance prediction: A case study of US 550, Journal of GeoEngineering, 3(1), 13–24.Google Scholar ↗

[refR-15] Theyse, H. L., Hoover, T. P., Harvey, J. T., Monismith, C. L. and Coetzee, N. F. (2006): A Mechanistic-Empirical Subgrade Design Model Based On Heavy Vehicle Simulator Test Results, Geotechnical Special Publication No. 154.Google Scholar ↗