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International Journal of Basic Science and Technology

A publication of the Faculty of Science, Federal University Otuoke, Bayelsa State

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Archive | ISSUE: , Volume: Apr-Jun-2023

Geotechnical Evaluation of Soil at Okija, Okija Ozubulu Road, Anambra State. Nigeria


Author:Ugochukwu TE, Adeyeri JB, Opaluwa D, Omidiji,K.O.

published date:2023-Jun-11

FULL TEXT in - | page 92 - 100

Abstract

This paper focused on the geotechnical investigation of a proposed bridge site at Okija along Ozubulu - Okija Road, Anambra State. Both field and laboratory investigations were carried out to evaluate the properties of soils at the abutment and pier locations of the proposed bridge. The strata formations were obtained by test borings at five locations to depths of 0.6 – 8.1m. Laboratory index and strength tests were carried out on the undisturbed and disturbed samples obtained from the boreholes. The plastic index of the soils varied from 3.71-18.17, Maximum Dry Density of 1.40 to 2.11G/cm3 with Optimum Moisture Content of 8.70 - 14.70%, with Bulk Density from 13.74 - 20.70kN/m3, California bearing ratio; 7.1 to 13.3%, Unconfined compression test; 116.5-1303.0 kN/m2 and Direct Shear Test from 13 – 30 kN/m2. According to the American Association of State Highway and Transportation Official classification, all the soils between the solid rock and the topsoil fell into A – 2 – 4 and A – 2 – 5 subgroups, which meant that the soils were good and excellent as the base and sub-base materials which showed that the soil is a good material for bridge construction

Keywords: Bridge, California bearing ratio,Foundation, Geotechnical, Sandstone

References

AASHTO (2012) Classification of Soils and Soil-Aggregate Mixtures for Highway Construction Purposes. M145-91. American Association of State Highway and Transportation Officials, Washington DC.

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Mallo, S. J. and I. N. Akuboh. 2012. Geotechnical Investigation of Soils: “A Case Study of Gombe Town (Sheet 152NW), North Eastern Nigeria”. International Journal of Modern Engineering Research. 2(6): 4280-4286.

Malomo, S. and O. Ogunsanwo. 1983. “The Preconsolidation Pressure of a Laterite Soil”. Bulletin of the International Association of Engineering Geology (Bull. I.A.E.G.). 28: 261-265.

National Engineering Handbooks. 2012. “Engineering Classification of Rock Materials”, Chapter Engineering Geology, Part 631 Geology. (210–VI–NEH, Amend. 55, January 2012).

Ogunsanwo, O. 1986. “Basic Index Properties, Mineralogy and Microstructure of an Amphibolite Derived Laterite Soil”. Bull. I.A.E.G. 33: 19-25.

 

 

FULL TEXT in - | page 92 - 100

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