Abstract
This paper describes a numerical investigation into the influence of heat exchange on the thermo-hydro-mechanical response of embankments with poorly-draining backfills. Heating of unsaturated soils within an embankment can lead to permanent volume changes as well as thermally-induced water flow away from the zone of heat exchange, resulting in an increase in effective stress and shear strength. Predictions of the coupled flow of heat and water in an unsaturated soil during application of high temperatures indicate that heating of the unsaturated soil layer leads to increased suction in a relatively small zone of influence, with a greater increase in shear strength for soils with initially lower degrees of saturation
Published Version
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