Centrifuge modeling of surface footings on a sand layer underlain by a rigid base

摘要

The results of centrifuge modeling of surface footings on a sand layer underlain by a rigid base are presented. The primary objective was to investigate the effect of sand layer thickness on the ultimate bearing capacity. The relative density of the sand layer and shapes of the model footings were also varied in the test program. The data indicate that prototype size footings are likely to experience local shear failure rather than general shear type failure. The observed values of the bearing capacity are compared with the predictions based on the Mandel and Salencon (1972) theory. It is concluded that theoretical predictions are conservative in relation to the experimental bearing capacity values, if appropriate values of mobilized angles of friction are used.