Axial Response of Driven Steel Pile in Clearwater, MN, Using Elastic Solution and Seismic Piezocone
Publication: Geo-Congress 2023
ABSTRACT
Many state DOTs have developed or are developing new guidance for driven pile design based on parameters derived from cone penetration test (CPT) site investigations. The response of a driven closed-ended steel pipe pile that was statically load tested for a bridge crossing the Mississippi River at Clearwater, MN, is represented using an elastic continuum solution for axial load versus displacement and axial load transfer. All geoparameters for pile design are supplied by results from seismic piezocone penetration tests (SCPTU) following the procedures outlined in the new 2018 Minnesota DOT (MnDOT) CPT design manual. The pile installation and load test performance were documented as a case study and include load distribution measurements along the length of the pile, allowing separation of side and tip components. The measured and predicted performance agree well, with the latter showing approximate nonlinear behavior using the fundamental Gmax profile from the shear wave velocity profile at the site and a simple modulus reduction scheme that tracks with the calculated factored geotechnical resistance from the load testing measurements.
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Geo-Congress 2023
Pages: 260 - 269
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Published online: Mar 23, 2023
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