CONSIDERATION ON THE VARIATION OF STRENGTH PARAMETERS, c, φ WITH SHEAR DISPLACEMENT

概要

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Direct shear tests were conducted on some kinds of undisturbed and compacted soils under unsoaked and soaked conditions to obtain the mobilized strength parameters, c, φ with shear displacement. The mobilized apparent cohesion obtained from the relation between normal stress σ and shear stress τ as a function of shear displacement strongly depends on the relation between shear stress and shear displacement. The strength anisotropy during the shear process is controlled by the anisotropy of cohesion during the same process. In the stability analysis of slopes, the safety factors as a function of shear displacement depend on the variations of strength parameters c, φ, the depth of slip plane and the inclination of slope. The overall calculation of the safety factor for actual design of slopes should consider the peak strength, and the maximum and minimum safety factors as proposed in this paper.
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