Abstract
This paper presents a simple procedure for evaluating the coefficients of volume change of unsaturated soils from measurements of the shear and dilatational wave velocities. The procedure is based on some analytical expressions that have been derived in the present study using the theory of linear elasticity for low-frequency excitations. The soil parameters required as input are the porosity and degree of saturation of the soil, Poisson's ratio of the soil skeleton, and three physical parameters that generally assume constant values. The results of some applications of the proposed method to a set of experimental data published in the literature are also shown.
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