Formulation of Tsinghua-thermosoil model: A fully coupled THM model based on non-equilibrium thermodynamic approach

Abstract

A fully coupled THM model for saturated soil based on non-equilibrium thermodynamic approach is developed. In the model, THM coupling processes are described by a set of migration coefficient model and energy functions from which constitutive relations of all fields are deduced theoretically. Granular entropy is introduced to describe the interparticle movement and respective non-elastic dissipation, and a mechanical constitutive model without yield surface is established. Conversion from bound pore water to free pore water induced by temperature elevating is considered in the model to simulate thermal-induced consolidation. © Springer-Verlag Berlin Heidelberg 2013.