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Bishop parameter χ from static equilibrium
DOI:10.1007/s11440-022-01639-w.png)
摘要
En 中文
For unsaturated soils, Terzaghi's effective stress sigma = sigma(tot) - u has been generalized by Bishop to the form sigma(B) = sigma(tot) - chi u. Factor chi, for example chi(S) approximate to S, takes into account the degree of saturation S. However, sigma(B) is unable to characterize strength and deformation of soil unless applied with suction. A new stress sigma(E) = sigma(tot) - chi(E)u with chi(E)(S, n) is proposed. It is likewise insufficient if applied without suction, but it has (at least) a clear physical meaning: sigma(E) represents contact forces between grains in the static equilibrium in the same manner as the effective stress does in saturated soils. All grains must be entirely surrounded by free or capillary water.
Keyword:
Air bubbles
Bishop stress
Capillarity
Effective stress
Unsaturated soil
期刊
IF:
5.7
论文数:
3.0K
被引数:
1.3W
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