Long-term deformation performance of earth dams on marine clays

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This proposed research is to numerically investigate the long-term deformation performance of an embankment dam founded on a deep deposit of marine clay. This research will be performed in collaboration with Ontario Power Generation Inc (OPG). The performance of earth embankment dams is adversely affected by the continuous settlement and lateral spreading of its foundation due to consolidation of underlying marine clay. Marine clay is notorious for being involved in many landslides worldwide with its peculiar properties of high sensitivity and low shear strength. Prediction of such performance can be further complicated by other mechanisms such as (a) weakening of the foundation clay due to loss of salinity, (b) weakening of the foundation soil by strain softening, and (c) strengthening of the foundation soil through consolidation.