I am looking for an information how to distinguish between plastic and elastic settlement after unloading the pile. Pile settlement was 52 mm on 1900 ton lading.Pile diameter 2 meters and installed in mudstone, sandy mudstone and sandstone stratas to depth 30m. After unloading there was residual settlement 44 mm. People say it was plastic deformation, but I am not sure. What is the percentage of residual settlement to say is plastic or elastic? Mudstone UCS is between 500 Kpa to 5 Mpa. SPT values taken were more then 100 all the way. Before this test we loaded one pile that settled 64 mm and rebounded to 58mm.There was a time gap between first and second test 4 month.Any influence on time delay.later you test less settlement we may get?
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