This analysis reveals how multi-stage loading affects excess pore water pressure in layered foundations with impervious piles, suggesting effective reinforcement strategies.
This study investigates the consolidation behavior of layered foundations reinforced by partially penetrating impervious piles. The analytical solution of a layered composite foundation reinforced by partially penetrated impervious piles is derived by considering the assumption of vertical equal strain and multi‐stage loading. The accuracy of the proposed analytical solution is confirmed through comparison with both a known special case solution and finite element method (FEM) simulation results. A comprehensive set of parametric studies is also performed using the derived analytical solution. The findings reveal that the application of multi‐stage loading contributes to minimizing the build‐up of excess pore water pressure (EPWP), while simultaneously decelerating the consolidation rate in composite foundation systems. Ignoring the underlying layer will overestimate the reinforcement effect of impervious piles on layered composite foundations.
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Zhang et al. (2025) studied this question.
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