Abstract
A design chart is a graphical tool that provides solutions to different scenarios of a system. In this paper, two types of design chart are developed based on deterministic and reliability-based analyses for determining the interface shear strength required for stability of a cover system to achieve a target safety factor of 1.5 and failure probability of 1 × 10−2. The deterministic design chart assists in the selection of different types of geosynthetic for lining materials based on the required interface shear strength for stability, and the reliability-based design chart enhances decision-making by taking into account the uncertainties in the design parameters, such as the variability of interface shear strength parameters. Additionally, the latter chart can also be used to determine the optimum slope angle for a containment facility that will satisfy both the target factor of safety and acceptable failure probability. Examples are provided to illustrate the use of the design charts in estimating the minimum required interface shear strength and their allowable variability for a given veneer cover, and the optimum slope inclination corresponding to different interface shear strengths and their associated variability.
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