ABSTRACT
Numerical analysis predicting embankment settlement on soft soils relies heavily on the selected constitutive soil model. The challenge often lies in selecting the most suitable model that aligns with the specific site condition. There is always a trade-off between simple constitutive model with minimal soil parameters and highly non-linear models with more number of parameters. For accurate settlement prediction, soil deformation behaviour must be considered, making a simple linear elastic model insufficient. This study undertakes a comparative evaluation of different constitutive soil models to assess their impact on the settlement behaviour of an embankment. Utilizing Modified Cam Clay (MCC), Soft soil (SS), Soft soil creep (SCC) and Hardening Soil (HS) models, the analysis examines their influence on settlement for different soft soils of varying compressibility. Soil parameters crucial for this evaluation are based on laboratory experiments reported in literature and from a typical soft soil in Assam, India.
