Load-Settlement Characteristics of Tropical Red Soils of Southern Nigeria

##plugins.themes.bootstrap3.article.main##

  •   Nkechinyere M. Nwokediuko

  •   Okiemute Roland Ogirigbo

  •   Iziengbe Inerhunwa

Abstract

This study investigated the relationship between the load-settlement curves obtained from field (in situ) plate load test under static loading conditions to those obtained from finite element (FE) analysis, for tropical red soils. Three test locations were selected within the University of Benin campus in Benin City, Nigeria. Laboratory tests were conducted on samples obtained from these three locations to obtain the index and strength properties of the soil, and these were used as input parameters for the FE analysis. The FE analysis was performed with PLAXIS 2D, using Mohr-Coulomb soil model as the constitutive model. Comparison of load-settlement curves obtained from the field plate load test with those obtained from the FE analysis showed that the FE tool was able to predict the ultimate vertical displacement for all three test locations, with good accuracy. The maximum vertical settlement obtained for Site A from the field plate load test was 8.79 mm, while that obtained from FE analysis was 9.02 mm. For Sites B and C, it was 12.77 mm vs 12.30 mm and 22.85 mm vs 22.30 mm respectively. Parametric studies were also conducted in order to evaluate the effect of variations in soil conditions on the static response of the soils. Results from the water table parametric analysis showed significant increase in vertical displacement as the soil immediately below the footing gets saturated. The results also showed that c and ϕ have significant influence on the load-settlement curves under static loading.


Keywords: Tropical red soils, Static plate load test, Finite element analysis, Load-settlement curves

References

G. Brink, “A Brief Overview of the Typical Engineering Characteristics of Tropical Red Soils,” in Engineering Geology for Society and Territory, vol. 6, G. Lollino et al., Eds. Cham: Springer, 2015, pp. 211-214.

O. A. Agbede, “Characteristics of tropical red soils as foundation materials,” Nigerian Journal of Science, vol. 26, pp. 237-242, 1992.

D. G. Toll, “Tropical soils,” in ICE manual of geotechnical engineering, vol. 1, London: ICE Publishing, 2012.

D. M. Burmister, “Prototype load-bearing tests for foundations of structures and Pavements,” in ASTM Specifications and Techniques, Publication No. 322, 1963, pp. 98-119.

K. Terzaghi, R. B. Peck and G. Mesri, Soil Mechanics in Engineering Practice, 3rd Ed. New York: Wiley, 1996, pp. 644.

S. M. Dasaka, A. Jain and Y. A. Kolekar, “Effect of Uncertainties in the Field Load Testing on the Observed Load-Settlement Curves,” Indian Geotechnical Journal, vol. 44(3), pp. 294-304, 2014.

H. N. Ramesh, D. L. Manjesh and H. A. Vijaya, “Effect of Static and Cyclic Loading on Behaviour of Fiber Reinforced Sand,” IOSR Journal of Engineering (IOSRJEN), vol. 3(9), pp. 56-63, 2013.

J. O. Ehiorobo, J. O., Okovido, and R. O. Ogirigbo, “Evaluation of Dynamic Properties of Soils in Site for Proposed Petrochemical Plant in Edo State, Nigeria,” Journal of Emerging Trends in Engineering and Applied Sciences (JETEAS), vol. 4(4), pp. 636-641, 2013.

H. O. Nwankwoala and T. Warmate, “Determination of Elastic Modulus using Plate Load test in Calabar, South Eastern Nigeria,” International Journal of Natural Sciences Research, vol. 2(11), pp. 237-248, 2014.

P. A. Okhakhu, “The Significance of Climatic Elements in Planning the Urban Environment of Benin City, Nigeria” Ph.D. dissertation, Department of Geography and Regional Planning, Ambrose Alli University, Ekpoma, Nigeria, 2010.

British Standard Method for Test for Soils for Civil Engineering Purposes, BS 1377-Part 9-1990.

W. G. Pariseau, Design Analysis in Rock Mechanics, 3rd Ed. The Netherlands: Taylor and Francis, 2017.

R. F. Craig, R. F. (2004). Craig’s Soil Mechanics. 7th Ed. Great Britain: Spon Press, 2004.

R. P. Hiller, “The Plate Test on Clay – A Finite Element Study,” Ph.D. dissertation, Department of Civil Engineering, University of Surrey, United Kingdom, 1992.

P. Anjan, Geotechnical Investigation and Improvement of Ground Conditions, 1st Ed. USA: Woodhead Publishing, 2019.

M. A. Shahriar, N. Sivakugan, B. M. Das, A. Urquhart and M. Tapiolas, “Water table correction factors for settlements of shallow foundations in granular soils”, International Journal of Geomechanics, vol 15(1), 2014, pp. 1-7.

K. H. Amster, “Soil Classification Handbook: Unified Soil Classification System (Geotechnical Branch Training Manual),” Geotechnical Branch, Division of Research and Laboratory Services, Engineering and Reseach Centre, Bureau of Reclamation, USA, 1986.

K. R. Arora, Soil Mechanics and Foundation Engineering, New Delhi, India: Standard Publishers Distributors, 2008.

Standard Practice for Classification of Soils for Engineering Purposes, ASTM D2487-2017.

Design Manual for New Construction, Helical Screw Foundation System, A. B. Chance Company, Hubbell Inc., 2003.

Downloads

Download data is not yet available.

##plugins.themes.bootstrap3.article.details##

How to Cite
[1]
Nwokediuko, N., Ogirigbo, O. and Inerhunwa, I. 2019. Load-Settlement Characteristics of Tropical Red Soils of Southern Nigeria. European Journal of Engineering and Technology Research. 4, 8 (Aug. 2019), 107-113. DOI:https://doi.org/10.24018/ejers.2019.4.8.1475.