Simplified method for estimating geosynthetic loads in landfill liner side slopes during filling

Abstract

Tensile loads can develop in geosynthetic layers in landfills on steep base-liner side slopes during filling. These loads develop due to interim geometries during the filling sequence where the soils and/or waste materials placed on the side slope are supported partially by the geosynthetics. In this paper, a simplified method for estimating these geosynthetic loads is proposed. This method provides a solution that maintains strain compatibility and that can be implemented easily with a spreadsheet. The validity of this approach is supported with one case study where field measurements of geosynthetic tension during cover soil placement are available. In addition, a design example is presented to demonstrate how the proposed approach can be used in practice.