Nonlinear consolidation theory for prefabricated vertical drains with elliptic cylindrical assumption

Abstract

Based on the influence of the non-linear change in the consolidation process of permeability coefficient and compressibility of soft soils and the theory of elliptic cylinders, derived the control equation of the nonlinear consolidation of the vertical foundation of the strip plastic drainage board. Further, according to the complete orthogonal space theory, the equivalent polynomial analytical expression of the nonlinear term is given. Then, the analytic solutions of the nonlinear consolidation are given, and through numerical calculation and verification analysis, it is considered that the Indrarantna (2005) approximation has a relatively small error at C_c/C_k (close to 1) and N_u (<4), but when C_c/C_k (difference from 1) and N_u are large (>4), the error is large.