Modeling of Laboratory Tests on Saint-Roch-de-l'Achigan Clay with S-CLAY1S Model

Journal article, 2017

This technical note presents some results of numerical simulations performed to evaluate the influence of anisotropy and destructuration on the stress-strain response of Saint-Roch-de-l'Achigan clay. The oedometer and triaxial tests were simulated with the finite-element method using two different constitutive models to represent the soil: the S-CLAY1S model, which accounted for anisotropy and destructuration, and the isotropic modified Cam clay model (MCC), which was used for comparison. In contrast to the MCC model, the S-CLAY1S model was able to simulate the compression curve for the whole range of stresses with one parameter set and, hence, represented soil behavior in the triaxial test in a more realistic way than the MCC. The results of this study confirm that when using recommended procedures for the determination and calibration of the input parameters, the S-CLAY1S model represents well the overall behavior of Saint-Roch-de-l'Achigan clay in the specific cases analyzed.