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Salahudeen, A. B.
Department of Civil Engineering, University of Jos, Jos, Nigeria.
Eberemu, A. O.
Department of Civil Engineering, Ahmadu Bello University, Zaria, Nigeria.
Ijimdiya, T. S.
Department of Civil Engineering, Ahmadu Bello University, Zaria, Nigeria.
Osinubi, K. J.
Department of Civil Engineering, Ahmadu Bello University, Zaria, Nigeria.
ABSTRACT
Strength
characteristics of foundation soils in the six geo-political zones of Nigeria
were evaluated based on standard penetration test (SPT) results using some
conventional empirical/analytical models and the bearing capacity was predicted
by numerical analysis using Plaxis 3D, a finite element application package.
The SPT N-values were first corrected to the standard average energy of 60% (N60)
before they were used to correlate soil properties. Evaluation of the soil
properties were done at foundation embedment depths of 0.6, 2.1, 3.6, 5.1, 6.6,
8.1, 9.6, 11.1 and 12.6 m. The results of overconsolidation ratio, rigidity
index, relative density, angle of internal resistance, undrained shear strength
and unconfined compressive strength show that the strength characteristics of
Nigerian soils is lowest on the average in the South South (SS) geo-political
zone, followed by South West (SW), South East (SE), North East (NE), North West
(NW) and the North Central (NC) geo-political zone has the highest prediction
of strength characteristics. Bearing capacity generally increased with boring
depth and having its lowest values in the SS geo-political zone and increased
for the remaining zones in the order of SW, SE, NE, NW and the NC geopolitical
zone.
Keywords: Geotechnical Properties; Strength Characteristics; Standard Penetration Test; Nigerian Soils
https://doi.org/10.33922/j.ujet_v5i1_10
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Published
Saturday, September 14, 2019
Issue
Vol. 5 No. 1, JUNE 2019
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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