- \({\gamma }_{t}\): unit weight.\(\gamma_{t}^{\prime }\): submerged unit weight. \(N\): SPT N-value. \(\sigma_{v}^{\prime }\): effective vertical stress. \({N}_{65}\): SPT N-value for a reference effective mean stress. \({F}_{c}\): fine particle content. \({V}_{S}\): shear wave velocity. \(\sigma_{m0}^{\prime }\): reference effective confining pressure. \({G}_{m0}\): shear modulus for the soil skeleton at small strain for the reference effective confining pressure. \({K}_{m0}\): bulk modulus for the soil skeleton at small strain for the reference effective confining pressure. \(\phi\): internal friction angle. \({m}_{G}\): exponent that determines the dependence of the shear modulus for the soil skeleton at small strain on the effective confining pressure. \({m}_{K}\): exponent that determines the dependence of the bulk modulus for the soil skeleton at small strain on the effective confining pressure. \(n\): porosity. \({h}_{max}\): maximum damping factor
