Length Scale and Tensile Strength Cutoff in Analyses of Slopes
While paramount among geotechnical stability analyses, slope stability is not a well-posed problem from the standpoint of mechanics. Consequently, in order to assess the safety of a slope, the problem is solved for a substitution material whose strength differs from the true soil in the slope. A classical infinite slope concept will be discussed first, and a surprising outcome will be discussed in the context of selecting an appropriate length scale for the problem. The importance of a mathematical model of the soil strength in stability analyses will be discussed in the second part of the presentation, and examples of analyses with tensile strength cutoff will be presented.