Variability Analysis of the Behaviors of a Lateritic Soil Profile as a Structural Material

Nwa-David, Chidobere D.; Onyeka, Festus C.

doi:10.30684/etj.2023.137779.1359

	Variability Analysis of the Behaviors of a Lateritic Soil Profile as a Structural Material
Engineering and Technology Journal
Article 6, Volume 41, Issue 5, 2023, Pages 666-672 PDF (743.38 K)
Document Type: Research Paper
DOI: 10.30684/etj.2023.137779.1359
Authors
Chidobere D. Nwa-David¹; Festus C. Onyeka^* ²
¹Civil Engineering Department, Faculty of Engineering, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria.
²Department of Civil Engineering, Edo State University, Uzairue Department of Civil Engineering, University of Edo State+234
Abstract
The desideratum of determining the behavior of the underlying soil on which the foundations will be laid is indisputable. This study evaluates the strength characteristics of lateritic soil material at a new construction site opposite College of Engineering and Engineering Technology (CEET), Michael Okpara University of Agriculture, Umudike (MOUAU). A trail pit was dug taking disturbed soil samples at a depth of 1m, 2m, and 3m for experimental analysis. Laboratory tests on specific gravity, grain size distribution, moisture content, atterberg limits, and triaxial tests were carried out on each sample by the procedure highlighted in BS1377 1990. Inspecting visually, the soil profile was observed to consist of three layers; light reddish, reddish, and whitish at the top, middle, and bottom respectively. The natural water content of the soil samples varied as 9.06+0.00 %, 7.98+0.00 %, and 9.32+0.03 %, while the specific gravity obtained from the test results was 2. 630+0.00 %, 2.634+0.00 % and 2.647+0.00 % at depths 1m, 2m, and 3m respectively. Using the unified soil classification system (USCS), the top, middle and bottom layers were classified as cloud sand (SC). The soil samples have a liquid limit (LL) of 24.5%, 28.8%, 31.0%; plastic limit (PL) of 19.4%, 17.2%, 18.5%; and plasticity index (PI) of 5.1%, 11.6%, and 12.5% at depths 1m, 2m, and 3m respectively. It was observed that the soil index properties vary and are enhanced as the depth of the excavation increases. Furthermore, the value of the cohesion property of the soil is 74.62 kN/m2, 29.70 KN/m2, and 24.65 KN/m2 for samples at 2m, 3m, and 3m depth respectively. The greatest and least cohesion value was noted to be 74.62 kN/m2 and 24.65 kN/m2 for samples at 2m and 3m depth respectively; the maximum and minimum angles of internal friction were 25.52o and 13.67o at depths 1m and 2m respectively. The outcome of this paper showed that the analyzed soil samples are suitable for civil engineering works.
Highlights
Specific gravity variation of soil samples proved their were inorganic nature, hence suitable for construction works. The soil samples have high plasticity, good shear strength, and bearing ability. The lateritic soil samples are suitable for subgrade, subbase, and base materials.
Keywords
Variability analysis of soil with depth; Index behavior of laterite; cohesion property of soil; soil limit state analysis

References
[1] Raj, P. P. Soil mechanics and foundation engineering, Dorling Kindersley (India) Pvt. Ltd., New Delhi, 2012. [2] Bowles, J. E. Engineering properties of soils and their measurements, Fourth edition, McGraw Hill Education (India) Private Limited, New Delhi, 2012. [3] O. Ademila, Application of geophysical survey for subsurface investigation of an erected multistory building in southwestern Nigeria, Int. Basic Appl. Res. J., 2 (2016) 1-12. [4] K. A. Mohammed, G. L.Yisa, E. Sule, H. L. Makwin, Investigation of index properties of a residual soil profile, IOSR J . Civ. Mech. Eng., 11 (2014) 1-4. [5] P. L. Dharamapriya, H.A.H. Jayasena, Prior assessment of variability in the geotechnical properties of soils for efficient infrastructure management, Research Square, 1 (2021) 1-26. https://doi.org/10.21203/rs.3.rs-1032504/v1 [6] A. Laskar, S. K. Pal, Geotechnical characteristics of two different soils and their mixture and relationships between parameters, Electron. J. Geotech. Eng., 17 (2012) 2821-2832. [7] E. Sule, E. H. Maude, A. Y. Adamu, B. Y. Mailafiya, Investigation of index properties of soils along jos-makurdi road in North-Central Nigeria, Saudi J. Civ. Eng., 5 (2021) 87-90. [8] E. O. Eze, O. S. Osuji, J. T. Akinwamide, Characterisation of index properties of lateritic soils in Ado Ekiti South-Western, Nigeria, Int. j. sci. res., 6 (2017) 308-312. [9] B. N. Ndukwu, E. U. Onweremadu, U. N. Nkwopara, C. M. Ahukaemere, E. E. Ihem, L. C. Agim, Variability of selected soil properties of a river slope in Amaigbo, South-Eastern Nigeria, Futo J. Sci., 1 (2015) 8–16. [10] R.M. Lark , H. C. Wheeler, Understanding and using yield maps and analytical tool for their interpretation, Outlook on Agriculture, 29 (2000) 39-45. https://doi.org/10.5367/000000000101293031 [11] U. N. Nkwopara, Variability in selected soil properties of soils of dissimilar parent materials in the humid tropics, Int. J. Environ. Agric. Biotech., 3 (2018) 1467-1472. http://dx.doi.org/10.22161/ijeab/3.4.44 [12] I. A. Oyediran, H. F. Durojaiye, Variability in the Geotechnical properties of some residual clay soils from South-Western Nigeria, Int. j. sci. eng. res., 2 (2011) 235-240. [13] A. N. Amadi, W. G. Akande, I. A. Okunlola, M. O. Jimoh, D. G. Francis, Assessment of the geotechnical properties of lateritic soils in Minna, North-Central, Nigeria for road design and construction, American J. Min. Metall., 3 (2015) 15-20. [14] F. C. Onyeka, D. Osegbowa, Soil structural analysis of laterite properties used as a road construction material, Abuja as a case study, Int. Res. J. Innov. Eng. Technol., 4 (2020) 35-42. https://doi.org/10.47001/IRJIET/2020.411005 [15] F. C. Onyeka, Structural analysis of stabilization and consolidation settlement of selected laterite soil using cement lime and bitumen, Int. J. Trend Sci. Res. Dev., 4 (2019)13-20. [16] British Standard Institute, Methods of Testing Soils for Civil Engineering Purposes, BS1377, part 2, 1990. [17] Vankatramaiah, Geotechnical engineering, third edition. New Age International Publishers, New Delhi, 2007. [18] BS EN ISO 17892-8:2018, Investigation and Testing. Laboratory testing of soil unconsolidated undrained triaxial test. [19] S. Prakash and P. K. Jain, Engineering soil testing. Nem Chand & Bros, Roorkee India, 2002. [20] J. E. Bowles, Engineering properties of soils and their measurements, Fourth edition, McGraw Hill Education (India) Private Limited, New Delhi, 2012. [21] Federal Ministry of Works and Housing (FMWH), General specification for roads and bridges, volume II, Federal Highway Department, Lagos, Nigeria, 317, 1997. [22] R. Obrzud and A. Truty, The Hardening soil model. a practical guide book. Z Soil PC 100701 report, 2012. [23] G. Meyerhof, Penetration tests and bearing capacity of cohesionless soils. J Soils Mechanics and Foundation Division ASCE 82, SM1 (1956).
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