Consolidation Analysis of Composite Ground with Weak Drainage Columns in Consideration of Disturbance
Based on axisymmetric consolidation model, using a new initial condition derived from equilibrium equations and equal strain assumption, and considering the gradual variation of compression modulus and horizontal permeability of disturbed soils, an analytical solution was derived for the consolidation of composite ground with weak drainage columns subjected to an instant loading. Two types of variation patterns of compression modulus of the disturbed zone were considered. The consolidation behavior of composite ground with weak drainage columns was subsequently investigated in consideration of disturbance. The results show that without considering the gradual variation of compression modulus of the disturbed zone will underestimate the rate of consolidation; the size of disturbed zone has a greater influence on the consolidation rate; the larger the disturbed zone, the faster the consolidation rate is; the consolidation is faster if the linear distribution pattern of the variation of compression modulus of the disturbed zone is considered; the consolidation is slower if the exponential distribution pattern is considered.
Dongye Sun, Wen-Pei Sung and Ran Chen
X. J. Tian et al., "Consolidation Analysis of Composite Ground with Weak Drainage Columns in Consideration of Disturbance", Applied Mechanics and Materials, Vols. 71-78, pp. 186-192, 2011