Abstract
Soft ground deforms in both vertical and lateral directions when subjected to loads. These soils need to consolidate and gain strength to further use it for different engineering applications. Prefabricated vertical drains are very efficient for deep soil deposits employed with preloading for ground improvement. In this paper, a case study of a container yard in Chittagong port, Bangladesh is used to investigate the characteristics of the soil and its response when they are incorporated with PVDs. Final settlements of 258 mm are predicted using the Asaoka method for 1 m c/c PVD spacing. Numerical analysis is carried out by FEM software Plaxis to evaluate the performance of the PVDs during the consolidation. Different spacing of PVDs is also considered for the study. Settlements of 258 mm and 205 mm are obtained for 1 m and 1.5 m c/c PVDs spacing at the end of 52 days. The present study investigates the variations of both vertical deformations and lateral deformations of soft ground treated with PVDs. Lateral displacements at the end of surcharge loading and surface settlements are calculated.
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