Analysis of elastic viscoplastic consolidation of sand drain foundations with exponential seepages

Studies have shown that the pore seepage in soft clay deviates from Darcy's law, with compressibility and permeability of soil demonstrating obvious nonlinear characteristics during consolidation process. These factors will affect sand drain foundation In order to explore mechanism saturated clay, this paper introduces UH model considering time effect describe deformation relation skeleton under Barron free strain assumption exponential equation as an alternative law. Additionally, impact coefficient smearing is considered which used re-derive conventional equation, then finite difference method adopted give implicit numerical solutions equation. By comparing literature results, validity developed verified. Then, effects nonlinearity, construction disturbance, external load on process are studied a function time. The current results reveal due viscous soil, pressure near undrained boundary pre-loading period increases. above phenomenon more evident when non-Darcy seepage; meanwhile, rate also becomes increasingly slow. Moreover, decrease smear zone can significantly reduce dissipation overall foundation, while increase accelerates consolidation.