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Author:
yannick
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2005-08-08 |
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Can anyone please give me the theoretical explanation why, in a consolidated undrained test (CU) the effective stress path moves straight upwards (till the soil yields) in a (p',q) diagramma.
thanks,
Yannick
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Follow-up:
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Author:
Magdalena Kowalska
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2005-09-01 |
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I've also found it very surprising. The good answer to your question gives 'The Mechanics of Soils' by J.H. Atkinson & P.L. Bransby - chapter 13. Crosssection of undrained plane and elastic wall is a vertical line. Until you reach state boundary surface (plasticity) the soil moves on the elastic wall. In v/p' space its projection is a line with slope kappa. In undrained conditions v remaines constant, so the only movement on the wall you can make without changing v is vertical( delta p' equals zero).
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to subject 'Geotechnical research and education'
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Follow-ups:
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Subject:
CU Test 