Abstract
AbstractThe bearing capacity solutions for determining the stability of a circular footing placed above a spherical cavity in clay are presented in this study. The circular footing is modeled by rigid plate elements and placed on clay, where the spherical cavity is located beneath the footing. The considered dimensionless parameters are the ratio between the diameter of the footing and cavity, as well as the ratio between the cover-depth of the cavity and the diameter of the footing. By using the lower and upper bound finite element limit analysis, the undrained bearing capacity of this problem can be obtained. The collapse mechanisms of circular footings placed above spherical cavities in clays are also examined and discussed in the paper. The results of the paper provide a guidance theory and an effective tool for practical engineering in determining the bearing capacity of circular footings placed above spherical cavities.KeywordsCircular footingClayCavityLimit analysisFinite element
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