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- W2392134472 abstract "To make use of light weight sand,soil failure criterions of definite physical meaning were researched,then shear strength characteristics of light weight sand were studied by triaxial compression test.The results show that there are two types of soil failure criterions: deformation criterion and strength criterion,the two are unified by effective stress principle,and they have close relation with pore pressure development path.Strain softening and strain hardening are external behavior of shear dilatancy-contraction for light weight sand.Maximum effective principal stress ratio criterion or maximum principal stress difference criterion should be used for the softening condition,the two criterions are unable to lead to significant difference for shear strength parameters of light weight sand,and axial strain criterion(15%) should be used for the hardening condition.Mohr failure envelope shapes of light weight sand are decided by primary structural strength and confining pressure,when confining pressure is higher than its structural yield stress,failure envelope is a beeline.Cohesion and effective cohesion decrease with increased EPS(expanded polystyrene) mixed ratio,increase with increased cement mixed ratio and age;internal friction angle and effective internal friction angle decrease with increased EPS mixed ratio,increase with increased cement mixed ratio and age.Shear strength characteristics of light weight sand are decided by spatial substitution effect of EPS beads and node cementation effect of cement." @default.
- W2392134472 created "2016-06-24" @default.
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- W2392134472 date "2011-01-01" @default.
- W2392134472 modified "2023-09-22" @default.
- W2392134472 title "Triaxial compression test on shear strength characteristics of light weight sand" @default.
- W2392134472 hasPublicationYear "2011" @default.
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