Back Analyses of Landfill Slope Failures

Huvaj Sarıhan, Nejan
Stark, Timothy
This paper investigates the shear strength of municipal solid waste (MSW) using back analyses of failed waste slopes. Shear strength of MSW is a function of many factors such as waste type, composition, compaction, daily cover, moisture conditions, age, decomposition, overburden pressure, etc. These factors together with non-standardized sampling methods, insufficient sample size to be representative of in-situ conditions, and limited shear displacement or axial strain imposed during the shear tests affect the test results and have created considerable scatter in reported test results. This scatter led the authors to pursue the back-analysis of failed waste slopes as a better means for estimating the shear strength of MSW. The back-analysis of failed waste slopes in the Gnojna Grora landfill in Poland, Istanbul Landfill in Turkey, Hiriya Landfill in Israel, and Payatas Landfill in Philippines are presented in this paper. Each of the landfill slope failures is reviewed and the results of the back-analyses presented. Finally, comparison of the recommended shear strength envelope of MSW and those by various researchers for the design of landfill slopes is presented.
Citation Formats
N. Huvaj Sarıhan and T. Stark, “Back Analyses of Landfill Slope Failures,” Virginia, Amerika Birleşik Devletleri, 2008, vol. 1, p. 1, Accessed: 00, 2021. [Online]. Available: