alexa Geotechnical Evaluation of Foundation Conditions in Igbogene, Bayelsa State, Nigeria
ISSN: 2381-8719

Journal of Geology & Geophysics
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Research Article

Geotechnical Evaluation of Foundation Conditions in Igbogene, Bayelsa State, Nigeria

Nwankwoala HO1* and Adiela UP2

1Department of Geology, University of Port Harcourt, Nigeria

2Geosciences Department, Nigerian Agip Oil Company, P.O Box 923, Port Harcourt, Nigeria

*Corresponding Author:
Nwankwoala HO
Department of Geology
University of Port Harcourt, Nigeria
Tel: +2349059208246
E-mail: [email protected]

Received date: January 18, 2016; Accepted date: September 26, 2016; Published date: September 30, 2016

Citation: Nwankwoala HO, Adiela UP (2016) Geotechnical Evaluation of Foundation Conditions in Igbogene, Bayelsa State, Nigeria. J Geol Geophys 5:265. doi: 10.4172/2381-8719.1000265

Copyright: © 2016 Nwankwoala HO et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Geotechnical studies were carried out to investigate the foundation conditions in Igbogene, Etelebou in Bayelsa State, Nigeria. The evaluation was carried out by means of three (3) number boreholes to a maximum depth of 30 m below the existing ground level using the cable percussive rig. Field and laboratory investigations reveal a near surface stratigraphy of clay to an average depth of 6 m underlain by loose silty sand to a depth of 10 m below the existing ground level. Underlying this clay layer, the formation presents a stratum of sand which extends to the maximum depth of investigation. Field and laboratory analysis carried out on relatively undisturbed soil samples of the silty clay showed the undrained shear strength of this near surface soil to lie between 40 and 56 kPa with a mean value of 47 kPa. However, the 1.0 m thick peat embedded between 3.0 m and 4.0 m will great increase the compressibility of this clay. Pile foundation is recommended, considering the anticipated load and the very high compressibility of peat under imposed load. Piles should be straight-shaft, closed-ended steel pipe piles and driven into the medium dense sand. Pile load test should be carried out on all piles to confirm working load and estimated settlements.

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