Abstract
Evaluation has been made of several theories and methods for deducing sand strength from cone resistance. Bearing capacity theories, cavity expansion theory, and empirical methods have been studied. The cavity expansion method gave the best agreement between predicted and measured friction angles. Some modification of the original Vesic cavity expansion formulation was found to improve the results. For incompressible sands, friction angles determined using the Durgunoglu and Mitchell bearing capacity theory and a state parameter method were also found to agree closely with measured values.
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