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The velocity of shear waves in unsaturated soil

Whalley, W. R.; Jenkins, M. and Attenborough, K. (2012). The velocity of shear waves in unsaturated soil. Soil and Tillage Research, 125 pp. 30–37.

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The velocities of shear waves Vs in two soils, a loamy sand and a sandy clay loam, were measured at various matric potentials and confining pressures. We used a combination of Haines apparatus, pressure plate apparatus and a Bishop and Wesley tri-axial cell to obtain a range of saturation and consolidation states. We proposed a single effective stress variable based on a modification to Bishop’s equation which could be used in a published empirical model (Santamarina et al., 2001) to relate shear wave velocity to soil physical conditions. Net stress required a nonlinear transformation. Matric potential was converted into suction stress with the function proposed by Khallili and Khabbaz (1998), thus requiring an estimate of the air entry potential. We found it was possible to fit Vs to void ratio, net stress and matric potential with a set of four parameters which were common to all soils at various states of saturation and consolidation. In addition to the data collected for this study we also used previously published data (Whalley et al., 2011). The utility of shear wave measurements to deduce soil physical properties is discussed.

Item Type: Journal Item
Copyright Holders: 2012 Elsevier B.V.
ISSN: 0167-1987
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEPSRC (Engineering and Physical Sciences Research Council)
Keywords: soil; shear wave velocity; unsaturated; consolidation; tri-axial testing
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Related URLs:
Item ID: 34343
Depositing User: Keith Attenborough
Date Deposited: 13 Sep 2012 08:29
Last Modified: 09 May 2019 03:34
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