Abstract
In bioreactor landfills, pressured leachate re-circulation can significantly influence the process of stabilization and the slope stability. To accelerate the leachate re-circulation and avoid slope failure, in this study, construction of a spatial reinforcement net is proposed, which consists of bonded whole waste tyres during municipal waste landfill. A coupled dual-permeability model and equilibrium equation were used to examine the enhanced leachate distribution and the local factor of safety of slope stability for a simplified bioreactor landfill. The simulation results demonstrated that for similar injection efficiency, the waste tyres net can help to decrease the amount of horizontal trenches and allows higher injection pressure under conditions of intermittent re-circulation. By virtue of waste tyres, the slope stability was considerably improved even when being exposed to a higher injection pressure.
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