Analytical Modeling with Laboratory Data and Observations of the Mechanisms of Backward Erosion Piping Development

Backward erosion piping accounts for one of the leading threats to dams and levees throughout world. A laboratory modeling program has been conducted interpret pore pressure data observations collected during backward (BEP) initiation progression in sandy soils. An analytical model applied assess development BEP mechanisms as well calculating critical hydraulic conditions required various stages initiate progress. The results with predicted are produced by successively matching head regime surrounding developing based on measurements obtained from models. Interpretation an allows assessment processes governing progression, including: (1) substantial concentrations seepage flow around edge exit area resulting increased gradients (i.e., sand boiling); (2) soil particles collapsing channel development). findings study identified criterion that can be mechanics.