2D and 3D numerical simulations of reinforced embankments on soft ground (original) (raw)
2008, Geotextiles and Geomembranes
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Case Study: Unsaturated Embankment Failure on Soft Soils
Journal of Geotechnical and Geoenvironmental Engineering, 2020
This paper describes the application of unsaturated soil mechanics to an interstate connecting-ramp embankment that failed during 6 construction. Specifically, matric suction is incorporated into the calculation of the tension crack (TC) depth induced by desiccation and strain 7 incompatibility and the contribution of matric suction to embankment shear strength. The results are compared with field observations to 8 assess the viability of unsaturated soil mechanics in modeling compacted embankments in stability analyses. Results from this study suggest 9 that using unsaturated shear strength parameters while introducing a TC in the compacted fill yields a reasonable inverse analysis of 10 this interstate embankment. This may be preferred in slope stability analyses to the current practice of using an undrained shear strength 11 (i.e., cohesion) for the unsaturated compacted fill and including a TC to generate a reasonable factor of safety.
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