Undrained behavior of silty sand: effect of the overconsolidation ratio |
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| Authors: | Ahmed Djafar Henni Ahmed Arab Mostefa Belkhatir A Saaed Hamoudi Hamid Khelafi |
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| Institution: | 1. Civil Engineering Department, University of Chlef, Route de Sendjas, BP 151, 02000, Chlef, Algeria
2. Civil Engineering Department, University of Sciences and Technology, BP 1505, El-Menouar Oran, Algeria
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| Abstract: | This experimental study deals with the effect of the overconsolidation ratio on the monotonic undrained shear behavior of silty sand. The study is based on the undrained monotonic triaxial tests for the overconsolidation ratios (OCR?=?1, 2, 4, and 8), with different silt contents ranging from 0% to 40%. The laboratory tests were carried out at an initial relative density of Dr?=?50%. The paper is composed of two parts. The first one presents the tested soils; the second one gives an analysis of the test results and discusses the influence of the overconsolidation ratio on the shear strength of the soil. The test results indicate that the shear strength of the soil increases with the increase of the overconsolidation ratio resulting in an increase of soil dilatancy. The increase in the amount of fines from 0% to 40% increases the phase of the contractancy and consequently reducing the phase of dilatancy of the tested material |
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