Abstract
This paper presents a novel analytical framework to predict short-term pile setup in natural structure clay, considering the influence of soil destructuration in installation and consolidation. Based on the cavity expansion method, a simulation of pile installation has been conducted, with an analytical solution formulated for cavity expansion under undrained conditions to effectively capture soil destructuration. The flow rate in the unit cell is determined by Darcy's law based on the soil mass volume change, leading to the consolidation equation. which is obtained in a fully analytical form for excess pore pressure dissipation. The utilization of the average compression curve aimed to depict a partially disturbed state, and permeability coefficient linearly distributed radially as a result of the effects of installation. Based on the rewritten effective stress method (\(\beta\) method), which involves the time-dependent factor, the time-dependent pile bearing capacity can be determined, by considering the relaxation and thixotropic effects through introducing parameters. Parametric analyses and discussion on the influence of soil destructuration. Finally, the analytical framework is validated through a comprehensive pile field test conducted at St-Alban. The close alignment between the analytical findings and the empirical data showcases the ability of the proposed framework to reasonably forecast short-term pile behavior.