Deformation Analysis of the Landfill “Rautenweg“ using 3D-Finite Element Modelling

The landfill body is gradually rising since the opening in the 1960s. The design level of fillis about 45 m above ground. Only limited movement and deformations are allowed in order to ensure unrestricted functionality of the Vienna Cutt-Off Chamber. At first a 2D-finite-element-model was established for selected cross sections to simulate the design of the landfill. Thus, the fundamental deformability behaviour of the landfill body as well as the lateral cut-off system was investigated. This paper reports on the complete 3D-finite-element model of the landfill Rautenweg. Only with a comprehensive model it is possible to reflect the crucial deflection of the cut-off system.The landfill body is enclosed by overlapping dams made of ash, slag and concrete. The design aswell as different construction stages have been modelled leading to a complex 3D-fi nite-element model. It is based on survey data obtained by remote sensing and available project data.