Three-dimensional characterization of non-uniform deformation in drying fine sediments: an x-ray CT study
Three-dimensional characterization of non-uniform deformation in drying fine sediments: an x-ray CT study
Desiccation-induced cracks in fine sediments comprises soil strength, elevate hydraulic permeability, and undermine the integrity of geotechnical structures. The drying-induced shrinkage is typically constrained at boundaries, fostering non-uniform shrinkage and promoting desiccation crack formation. This study employs sequential X-ray computed tomography (CT) scans to investigate non-uniform deformation in saturated bentonite during the drying process. Internal glass bubbles serve as markers, enabling the characterization of three-dimensional (3D) internal deformation. A particle tracking algorithm, enhanced by using an Artificial Neural Network, facilities the estimation of glass bubbles displacement fields between scans. Results indicate that sidewall adhesion contributes to non-uniform deformation during drying, fostering desiccation crack formation near the sidewall.
L. Li; B. Zhao
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
E - Environment, water and energy
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