Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Unsaturated shear strength of a silty sand
Abstract Series of single stage, consolidated drained direct shear tests under different net normal stresses and matric suctions were carried out to evaluate the unsaturated shear strength behavior of a silty sand. A back pressure shear box was used to measure and control pore-air and pore-water pressures. The experimental data show that matric suction increases shear strength of the soil significantly following a highly non-linear relationship. An increase in net normal stress results in a higher shear strength and the shearing behavior changes gradually from a peak shear strength followed by a strain-softening behavior to a strain-hardening behavior. A comparison between experimental shear strength measurements and predicted unsaturated shear strength values was made and the results are presented in the paper.
Highlights Increase in net normal stress or matric suction increases shear strength. Increase in shear strength due to matric suction shows a highly non-linear behavior. Unsaturated shear strength can be predicted closely as a first approximation. Net normal stress should be considered in the unsaturated shear strength prediction.
Unsaturated shear strength of a silty sand
Abstract Series of single stage, consolidated drained direct shear tests under different net normal stresses and matric suctions were carried out to evaluate the unsaturated shear strength behavior of a silty sand. A back pressure shear box was used to measure and control pore-air and pore-water pressures. The experimental data show that matric suction increases shear strength of the soil significantly following a highly non-linear relationship. An increase in net normal stress results in a higher shear strength and the shearing behavior changes gradually from a peak shear strength followed by a strain-softening behavior to a strain-hardening behavior. A comparison between experimental shear strength measurements and predicted unsaturated shear strength values was made and the results are presented in the paper.
Highlights Increase in net normal stress or matric suction increases shear strength. Increase in shear strength due to matric suction shows a highly non-linear behavior. Unsaturated shear strength can be predicted closely as a first approximation. Net normal stress should be considered in the unsaturated shear strength prediction.
Unsaturated shear strength of a silty sand
Schnellmann, Reto (Autor:in) / Rahardjo, Harianto (Autor:in) / Schneider, Hans R. (Autor:in)
Engineering Geology ; 162 ; 88-96
19.05.2013
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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