Improving the Reliability of Pile Drivability Studies by Explicitly Simulating Ground Disturbance-Video

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Video Summary

The speaker proposes improving pile-driving durability studies by explicitly modelling ground disturbance rather than relying mainly on empirical resistance coefficients. The method combines a one-dimensional wave equation with axisymmetric finite-element models at ground nodes, deriving soil stiffness and shaft resistance while tracking disturbance from each hammer blow. Demonstrations show the approach can reproduce a conventional continuum model and simulate hypothetical shaft-resistance softening, reducing the example installation from 220 blows to 130. Further development will require better constitutive and pile-toe models, improved treatment of interface and rate effects, and simulation of waiting-period effects such as creep and pore-pressure dissipation.

Keywords

pile-driving durability

ground disturbance

wave equation

finite-element modeling

shaft resistance