Cavity expansion in cohesive-frictional soils with limited dilation
| Autor: | Hai-Sui Yu, John P. Carter |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Géotechnique. :1-7 |
| ISSN: | 1751-7656 0016-8505 |
| DOI: | 10.1680/jgeot.21.00141 |
| Popis: | The problem of cavity expansion from zero radius has no characteristic length and therefore possesses a similarity solution, in which the cavity pressure remains constant and the continuing deformation is geometrically self-similar. In this case, the incremental velocity approach first used by R. Hill in 1950 to analyse cavity expansion in Tresca materials can be extended to derive a solution for the limiting pressure of cavity expansion in other types of material. In this paper, a rigorous semi-analytical solution is derived, following Hill's incremental velocity method, for the expansion of cavities from zero initial radius in cohesive-frictional soils with limited dilation. In particular, the radius of the elastic–plastic interface c is used in this paper as the timescale and the solution for the limit pressure has been presented. Solutions are evaluated for a number of cases representative of a range of cohesive-frictional and dilatant soils. A comparison is also made between the solutions presented here and previous solutions for cohesive-frictional soils that have unlimited (on-going) plastic dilation. In particular, the influence of limited plastic dilation on the cavity limit pressure is identified and discussed. |
| Databáze: | OpenAIRE |
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