Simulation of Soil-Structure Interaction with Sheet Pile and Retained Soil-PPT Presentation

PPT Presentation

Pdf Summary

The presentation examines soil–structure interaction (SSI) between sheet-pile walls and retained soil, a key factor in excavation performance and the protection of nearby infrastructure. It proposes a material-dependent joint element to model slip at the soil–wall interface. The element uses an interface coefficient to scale the surrounding soil’s cohesion and friction angle.<br /><br />Finite-element analyses compare a two-dimensional plane-strain model with thin-slice and fully extruded three-dimensional models. Results show that lower interface coefficients produce greater slippage, leading to increased wall (liner) displacement and bending moment. The 2D model and thin 3D model show good agreement. The extruded 3D model is also used to examine vertical and horizontal displacement.<br /><br />The study concludes that the interface coefficient provides a way to represent SSI effects, particularly slip, and that the 2D and 3D approaches yield comparable results in the cases examined. Both models failed to converge when interface strength criteria were exceeded under the applied loading. A key limitation is that the approach does not capture nonlinear yielding of the structural liner. Further validation and modelling of nonlinear joint behavior are recommended.

Keywords

soil-structure interaction

sheet-pile walls

retained soil

excavation performance

interface coefficient

finite-element analysis

slip at interface

wall displacement

bending moment

three-dimensional models