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See detailThe Bearing Capacity of Footings on Cohesionless Soils
Van Baars, Stefan UL

in The Electronic Journal of Geotechnical Engineering (2015), 20

In 1920 Prandtl published an analytical solution for the bearing capacity of a maximum strip load on a weightless infinite half-space. This solution was extended by Reissner in 1924 with a surrounding ... [more ▼]

In 1920 Prandtl published an analytical solution for the bearing capacity of a maximum strip load on a weightless infinite half-space. This solution was extended by Reissner in 1924 with a surrounding surcharge. Keverling Buisman (1940) extended the Prandtl-Reissner formula for the soil weight. It was Terzaghi (1943) who wrote this in the form which is nowadays used. Since then several people proposed equations for the soil-weight bearing capacity factor. In this paper, we show that all those equations assume a Prandtl failure mechanism, while Finite Element Modelling (FEM) of strip footings on cohesion less materials proofs a global failure mechanism. Also these equations result in a higher bearing capacity than found with FEM. This means that the currently used equations for the soil-weight bearing capacity factor, and also the corresponding shape factor, are inaccurate and unsafe. Therefore new equations for the soil-weight bearing capacity factor, the soil-weight shape factor and the surcharge shape factor have been presented in this paper. [less ▲]

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