Strengthening Earth-Fill Embankments with Waste Tyre Reinforcement for Improved Flood Resilience

The resilience of earth-filled embankments against flooding is experimentally investigated using a scaled laboratory model. The project aims to evaluate the effectiveness of low-cost strengthening methods and materials which can be easily implemented especially in developing countries. Investigating locally available materials like waste tyres and jute bags reveals promising options for strengthening embankments in these regions. The performance of waste tyres as reinforcement material connected using jute string was evaluated by conducting tests using four flow rates under two different scenarios: steady peak flow scenario with reinforcement and without reinforcement. Measurements of the embankment height along the cross-sectional width were recorded and the erosion level was analysed by quantifying sediment volume loss. Three successive modes of failure were determined: toe scouring, sliding, toppling. Direct correlation was observed between increasing discharge and water depth. Reinforcing the embankment significantly decreased erosion in the range of 30% - 50% under different flooding scenarios, therefore, highlighting its effectiveness in reducing failure risks and contributing to UN Sustainable Development Goals 9, 11 and 13.