A large container terminal is constructed at the port terminal in western coast of India by reclaiming the sea. The slope stability analyses have been performed for perimeter bund which is having a length of about 11km. The terminal is developed over marine clay and the maximum thickness of very soft to soft clay is around 24 m. The soft marine clay is susceptible to large settlements and slope failure during temporary & permanent condition. The ground improvement by prefabricated vertical drains (PVD) and preload is adopted to mitigate the aforesaid issues. In addition to the above, high tensile woven geotextile is also used at the perimeter bund to ensure adequate factor of safety against slip failure. This paper examines two failures of embankment slopes. The geotechnical investigation has been carried out at the collapsed region and itis observed that soil strength is inadequate to support the self-weight of the embankment along with preloaded surcharge.
Subjects: Ground improvement, Shear strength, Slope stability, Reclamation, Slope failure
Author: Vinay Kumar M., Geotechnical Engineer, Jeevan Reddy, Senior Engineer-Geotechnical and Aminul Islam, Assistant General Manager
Publisher: DFI