ABSTRACT
The slope stability of three different landfill capping systems using GCLs is analyzed. Results of tilting plate and shear box tests are given and the factor of safety for every possible shear plane is calculated. The critical shear plane is directly determined or calculated. System I with a single GCL sealing layer is stable for slope inclinations up to 1 (v): 2.5 (h). Systems II and III, consisting of a GCL and different embossed geomembranes, can be inclined up to 1 (v): 3 (h).
