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Landfill Slope Stability Risk Assessment

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Title: Landfill Slope Stability Risk Assessment
Author: Jahanfar, M.Ali
Department: School of Engineering
Program: Engineering
Advisor: Dubey, Brajesh
Abstract: Landfills have consistently, in the past as well as today, been the primary method for waste disposal. In the past 20 years, catastrophic landfill slope failures have occurred worldwide, especially the fatal ones. For instance, Bandung (2005) and Payatas (2000) dumpsite failures killed 147 and 300 people, respectively. This calls for more landfill failure investigation to prevent loss of human life and major environmental consequences. The goal of this study, therefore, is to introduce the framework to evaluate the risk of landfill slope failure. Simply put, risk is equal to the hazard of the probable landfill slope failure multiplied by the consequence of the failure (e.g., waste material flow over the residential area). Landfill failure hazard is a function of waste material geotechnical properties, while the consequence is a function of waste material rheological parameters. The range of geotechnical and rheological characteristics of the waste materials are provided by analyses of documented landfill and dumpsite failures. In terms of geotechnical characteristics, the mean values of unit weight, friction angle and cohesion are obtained 11.1 kN/m3, 25.4° and 10 kPa, respectively. For rheological feature, four classes of friction global distributions were recommended for run-out analysis of waste-flow given the potential for landfill failure. These results can be used to estimate the risk of existing landfills, manage them, and prevent the catastrophic disasters.
Date: 2014-05

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