Numerical Investigation into the Performance of the Soil Nail Wall and PileFoundation at the Swift Delta I-5 Interchange

摘要

Finite Difference Methods (FDM) and Finite Element Methods (FEM) studies arereported studying the soil nail wall construction at the Swift Delta I-5 Interchange bridge reconstruction in North Portland, Oregon. Five (5) layers of soil nails were installed between existing bridge supporting pipe piles, and a shortcrete finished face applied to stabilize the fill sand. A full 3D FEM analysis is reported of the top soil nail, adjacent pile and soil, by the code ABAQUS running on a CRAY MPX supercomputer. Linear elastic, anisotropic elastic and a single elastic plastic model were completed to study interaction and global stiffness contributions from the pile and nail.