Abstract
Isolated slip surfaces occur in softening soils, that is to say mainly stiff clays and dense sands. They do not occur for all plastic deformations.
A mechanism of progressive development of discrete slip surfaces in a heterogeneous stress field is first described, in good agreement with actual physical observations. This mechanism makes it possible to analyse mechanical strength tests and to show that the validity of the shear test is especially assured for residual strength. For the triaxial test, the peak value is seen to have physical significance, but the softening slope is shown to be function of sample size, also residual strength is not correct when a localization of strains occurs. A correction is proposed.
The occurence of slip surfaces questions the validity of classical formulae. Approximate practical corrections are proposed for bearing capacity of shallow foundations on sand and for active and passive earth pressures.
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© 1988 Springer-Verlag
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Habib, P. (1988). Slip surfaces in soil mechanics. In: Cristescu, N., Ene, H.I. (eds) Rock and Soil Rheology. Lecture Notes in Earth Sciences, vol 14. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0010082
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DOI: https://doi.org/10.1007/BFb0010082
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