Dynamic properties of sand from dry to fully saturated states
Dynamic properties of sand from dry to fully saturated states
By using bender and extender elements test, the velocities of the primary and shear waves, Vp and Vs respectively, were measured for a sandy material by gradually varying the degree of saturation, Sr, between the dry and fully saturated states. The effect on the results of varying the relative density and effective confining pressure was also studied. The measurements clearly reveal that for a certain optimum Sr, which is around 0·7–0·9% for the chosen sand, the value of the shear modulus G reaches a maximum value, whereas the corresponding Poisson's ratio ν attains a minimum value. The values of the shear modulus corresponding to Sr ≈ 0% and Sr = 100% tend towards the same value. For values of Skempton's B parameter greater than 0·99, the values of Vp and ν rise very sharply to those of water. The predictions from Biot's theory with respect to the variation of Vp with Sr match well with the measured experimental data.
45-54
Kumar, J.
c70d5995-3239-4de7-8ff1-44cf50fa4b2e
Madhusudhan, B.N.
e139e3d3-2992-4579-b3f0-4eec3ddae98c
Kumar, J.
c70d5995-3239-4de7-8ff1-44cf50fa4b2e
Madhusudhan, B.N.
e139e3d3-2992-4579-b3f0-4eec3ddae98c
Kumar, J. and Madhusudhan, B.N.
(2015)
Dynamic properties of sand from dry to fully saturated states.
Géotechnique, 62 (1), .
(doi:10.1680/geot.10.P.042).
Abstract
By using bender and extender elements test, the velocities of the primary and shear waves, Vp and Vs respectively, were measured for a sandy material by gradually varying the degree of saturation, Sr, between the dry and fully saturated states. The effect on the results of varying the relative density and effective confining pressure was also studied. The measurements clearly reveal that for a certain optimum Sr, which is around 0·7–0·9% for the chosen sand, the value of the shear modulus G reaches a maximum value, whereas the corresponding Poisson's ratio ν attains a minimum value. The values of the shear modulus corresponding to Sr ≈ 0% and Sr = 100% tend towards the same value. For values of Skempton's B parameter greater than 0·99, the values of Vp and ν rise very sharply to those of water. The predictions from Biot's theory with respect to the variation of Vp with Sr match well with the measured experimental data.
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e-pub ahead of print date: 25 May 2015
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Local EPrints ID: 400447
URI: http://eprints.soton.ac.uk/id/eprint/400447
ISSN: 0016-8505
PURE UUID: b58ee41c-b93d-4370-804f-caca1068a61f
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Date deposited: 19 Sep 2016 08:11
Last modified: 15 Mar 2024 03:50
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J. Kumar
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