Numerical Simulation of Frost Heave Deformation of Concrete-Lined Canal Considering Thermal-Hydro-Mechanical Coupling Effect

This work presents a comprehensive coupled thermal-hydro-mechanical model to explore the frost heave mechanism of concrete-lined canal under freeze–thaw environment. Unlike previous models that regard concrete as homogeneous material, this considers porous medium and effect pore structure, well water content, ice ice-water phase transition, on mechanical deformation canal. Firstly, based theories unsaturated soil mechanics, thermodynamics, poroelasticity, coupling equations condition are established. Then, permeability mechanics media, Finally, simulation is carried out compared with referred indoor test, in which evolution behavior temperature, depth, studied. The results show freezing process foundation unidirectional develops from surface bottom, thawing bidirectional thaws bottom center. at 1/2~1/3 slope height area largest, may easily lead damage lining area. obtained by numerical consistent experimental results, illustrates validity established for predicting canals.