KIT | KIT-Bibliothek | Impressum | Datenschutz

Bishop parameter $\chi$ from static equilibrium

Niemunis, Andrzej 1
1 Institut für Bodenmechanik und Felsmechanik (IBF), Karlsruher Institut für Technologie (KIT)

Abstract:

For unsaturated soils, Terzaghi’s effective stress σ=σ$^{tot}$−u has been generalized by Bishop to the form σ$^{B}$=σ$^{tot}$−$\chi$u. Factor $\chi$, for example $\chi$(S)≈S, takes into account the degree of saturation S. However, σ$^{B}$ is unable to characterize strength and deformation of soil unless applied with suction. A new stress σ$^{E}$=σ$^{tot}$−$\chi$Eu with $\chi$$^{E}$(S,n) is proposed. It is likewise insufficient if applied without suction, but it has (at least) a clear physical meaning: σ$^{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.


Verlagsausgabe §
DOI: 10.5445/IR/1000151058
Veröffentlicht am 11.10.2022
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Bodenmechanik und Felsmechanik (IBF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1861-1125, 1861-1133
KITopen-ID: 1000151058
Erschienen in Acta Geotechnica
Verlag Springer
Band 18
Heft 4
Seiten 2281–2287
Vorab online veröffentlicht am 09.09.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page