STRENGTH AND DEFORMATION CHARACTERISTICS OF SATURATED SAND AT EXTREMELY LOW PRESSURES

概要

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A series of drained triaxial compression tests at extremely low pressures was performed on saturated samples of fine, angular sand to know the dependency of both the angle of internal friction φ=arcsin {(σ_1'-σ_3')/(σ_1'+σ_3')}-<max> and the deformation characteristics on the value of σ_3'. Great cares were paid to the stress measurements and the stress corrections for membrane forces. Also in order to confirm the results with respect to the value of ψ, several analyses based both on the stress-dilatancy relations at failure and on the deformation characteristics of sample were performed. It was found that the change of φ with the change of σ_3' is very small when σ_3' is lower than around 0.5 kgf/cm^2 (50 kN/m^2), especially lower than around 0.1 kgf/cm^2 (10 kN/m^2). It was also found that the apparent cohesion intercept is not needed in using the Mohr-Coulomb failure criterion for the saturated sand tested. Further, it was found that the change of deformation characteristics of sand with the change of σ_3' is rather small when σ_3' is lower than around 0.5 kgf/cm^2 as well.
社団法人地盤工学会の論文
1984-12-15