Clayey　material　that　possesses　semipermeable　membrane　property　may　experience　osmotic　consolidation　in　presence　of　an　osmotic　gradient.　In　this　paper,　a　fully　coupled　H-M-C　model　has　been　presented　to　study　solute　transport　under　the　combined　influence　of　mechanical　and　osmotic　consolidations　and　vice　versa.　The　model　has　been　tested　against　the　results　of　relevant　importance　and　good　agreements　have　been　achieved.　The　model　has　been　applied　to　investigate　long-term　solute　transport　behavior　and　consequent　deformations/settlements　in　a　natural　clay　liner.　The　results　suggest,　at　early　stages,　solute　transport　is　dominated　by　mechanical　consolidation;　however,　physicochemical　interaction　associated　with　osmotic　processes　and　osmotic　consolidation　dominates　in　the　long　term.　Osmotic　settlement　shows　decreasing　trend　past　the　maximum　deformation　of　the　clay　liner　indicating　reduction　of　osmotic　gradient　across　the　semipermeable　membrane.　It　is　also　evident　that　overall　soil　consolidation　and　transport　of　solute　are　affected　by　the　concentration　of　the　solute　at　the　source　or　the　injection　boundary.