The bearing capacity of footings on granular soils. II: Experimental evidence

Scale effects, especially stress-level effects, cause considerable confusion in the calculation of bearing capacity on granular soils. A companion paper describes a new method of calculation that explicitly allows for the variation of sec φ with mean effective stress p. This approach is validated he...

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Bibliographic Details
Published in:Géotechnique 2011-08, Vol.61 (8), p.639-650
Main Authors: LAU, C. K, BOLTON, M. D
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Exact sciences and technology
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Summary:Scale effects, especially stress-level effects, cause considerable confusion in the calculation of bearing capacity on granular soils. A companion paper describes a new method of calculation that explicitly allows for the variation of sec φ with mean effective stress p. This approach is validated here for the case of model circular footings on dense beds of silica sand and silica silt. The models were tested at 1g with surcharge to explore the N q behaviour, and in a centrifuge to determine self-weight effects for N γ . It is shown that triaxial φ values expressed as a function of the logarithm of p can be used to predict model bearing capacities within a deviation in φ of 2°.
ISSN:0016-8505
1751-7656
DOI:10.1680/geot.7.00207