Analysis of the Influence of Waste Shear Strength Parameters on Landfill Slope Stability
– In this paper, the influence of waste shear strength parameters on landfill slope stability is studied. Namely, using the limit equilibrium method in GeoStudio 2018, stability analyses of a typical landfill slope are performed using semi-probabilistic and probabilistic approaches. The semi-probabilistic computations of slope stability are performed based on the available literature recommendations for the waste shear strength parameters. The results obtained for different recommendations are compared and discussed. In the probabilistic computations, the waste shear strength parameters are treated as random variables with Gaussian random distribution, where the parameters of the distribution are again selected based on the literature recommendations. Here, the influence of dispersion in the values of waste shear strength parameters is also examined. In addition, sensitivity analyses are also performed to gain insights into the relative importance of parameters. With the aforementioned analyses, an effort was made to investigate and derive conclusions about how the selection of waste shear strength parameters affects landfill slope stability.