Our research group has received a three-year grant from Army Research Office to study the formation of ice lens and the thawing plasticity of frozen soils. In collaboration with the cold regions research and engineering laboratory of US Army Corps of Engineers, our goal is to formulate a new model that predicts the evolution of ice lens. We also introduce a new validation metric to analyze the model performance in matching calibrated results and making forward predictions. In particular, we have identified modeling components that lead to seemingly excellent calibrations but does not provide real benefits for forward prediction ability (LEFT figure) and proposed remedies to enforce the consistency and robustness in the models (RIGHT figure). With this new start point, we introduce inverse problems and models to capture the growth of the ice lens and the corresponding implications on geosystems.
News about Computational Poromechanics lab at Columbia University.