Curved Mechanically Stabilized Earth Walls (MSEWs) Behavior from Field Measurements and Numerical Analysis

Mechanically Stabilized Earth Walls (MSEWs) are widely used for their ease of construction and cost-effectiveness. Current design equations primarily focus on two-dimensional approaches for straight sections, overlooking the unique challenges posed by curved sections. This study investigates the behaviour of convex curved sections in MSE walls under various factors. Field measurements were conducted on block-type MSE walls with a convex curved section to address gaps in design criteria. Measurements included lateral displacements and strain behaviour at different curve locations, with data collected from the curve start, centreline, and a straight section. The results revealed that horizontal displacements and strains were highest at the curve centreline, with maximum displacement occurring in the middle geogrid layers. Strain distribution analysis highlighted the curved section’s vulnerability to lateral forces, emphasizing the need for proper geogrid reinforcement. A 3D Plaxis model was used to simulate wall reinforcement and soil parameters, with FEM results closely matching field data. FEM predictions increased by 15% for wall heights ranging from 0.60H to H, aligning with field results for heights between 0.20H and 0.40H. These findings underscore the importance of considering three-dimensional effects in curved sections for MSE wall design.