Geotechnical characterization of industrial waste and its stability in a landfill site

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Even though recycling strategies are becoming more important in recent years, a huge number of industrial by-products are disposed of at landfills. Due to the size, possible dangerous composition, and heterogeneity, most of the wastes are located in landfills without a basic geotechnical characterization. This lack of information may have an important influence on the results of the stability calculations. This paper presents the results of the geotechnical characterization of some industrial wastes, coming from end of live vehicles, once disposed of at one landfill. The shear strength properties were determined based on direct shear test results carried out in a large shear box owned by CEDEX, which has a shear plane of 1 x 1 m. The tests were also performed in a 30x30 cm shear box. The present work also describes the bases of design for the global stability analysis of a landfill, by the definition of the relevant design situations, the sliding surfaces to be analysed, the piezometric levels to take into account and the material properties necessary to develop the calculations. Not only the theoretical framework is described but it also explained by an example of a global stability analysis of a landfill for industrial wastes. The stability calculations were performed for various hydrological scenarios to simulate the performance of the leachate drainage system.

9th International Congress on Environmental Geotechnics (ICEG2023)

Landfilling