Stress Changes Around a Pile Driven into Cohesive Soil

摘要

The driving of a pile is modelled as the creation of a long cylindrical cavity by radial soil movement. Predictions of stress and pore pressure change are made using a finite element scheme incorporating a work-hardening soil model. Results of parametric studies giving the stress changes during undrained cavity expansion and subsequent consolidation are presented. Simple design rules are given enabling the final stress conditions close to the pile to be estimated in terms of basic engineering soil properties. Complicating features such as soil sensitivity and clay-pile adhesion are also briefly discussed.