Stability Analysis of a Typical Sunderban Embankment During Diurnal Tidal Cycle

Earth embankments are utilized as protective structures along river, coastal banks and maybe thus exposed to steady or transient seepage induced by tides. In the Indian part of Sunderban region, the tidal head variation is 4–6 m in cycle time of 12 h. A model has been developed in FEM-based software, GeoStudio, to study the effect of transient seepage in such an embankment. The response to tidal head was found to be limited to a certain zone within the embankment. The cyclic pore water pressure distribution was seen to differ in various regions in this zone. Also, even though the cyclic FOS against stability was adequate, serviceability check indicates chances of failure near toe region.