Most of the available solutions concerning bearing capacity problems relate to foundations resting on deep soil deposits. In current practice, however, it frequently happens that the foundation soil is layered, and the top layer has a small thickness compared to the width of the footing. In such a case the failure mechanism and the corresponding ultimate bearing capacity may be significatively affected by the relative thickness of the soil cap and the underlying soil. Hence, this paper presents simple, still practical, solutions for the ultimate bearing capacity of a shallow, rough foundation resting upon a clay cap underlain by a deep layer of saturated sand. Solutions take into account the shear strength degradation of the sand due to earthquake-induced excess pore pressure build-up and are given in non-dimensional form for both strip and square footings.
Seismic bearing capacity of footings on saturated sand with a clay cap
CASCONE, Ernesto;
1998-01-01
Abstract
Most of the available solutions concerning bearing capacity problems relate to foundations resting on deep soil deposits. In current practice, however, it frequently happens that the foundation soil is layered, and the top layer has a small thickness compared to the width of the footing. In such a case the failure mechanism and the corresponding ultimate bearing capacity may be significatively affected by the relative thickness of the soil cap and the underlying soil. Hence, this paper presents simple, still practical, solutions for the ultimate bearing capacity of a shallow, rough foundation resting upon a clay cap underlain by a deep layer of saturated sand. Solutions take into account the shear strength degradation of the sand due to earthquake-induced excess pore pressure build-up and are given in non-dimensional form for both strip and square footings.Pubblicazioni consigliate
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