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Minimum Required Length for Geotechnical Lateral Stability of RockSocketed Pile Shafts
Civil and Environmental Engineering Faculty Publications and Presentations
  • Arash Khosravifar, Portland State University
  • Zia Zafir, Kleinfelder
Document Type
Post-Print
Publication Date
6-6-2018
Subjects
  • Piling (Civil engineering),
  • Shafts (Excavations),
  • Bridges -- Foundations and piers -- Analysis,
  • Load factor design
Abstract

The original strong-rock (SR) p-y curves for rock-socketed shafts exhibit a brittle response where the post-peak resistance drops to approximately zero. This brittle response could result in a progressive failure of the rock p-y curves which, in turn, results in excessive pile lengths. This paper proposes a modification to the strong-rock (SR) p-y curves where the post-peak residual strength is equal to 20% of the ultimate resistance (0.2*pult). This residual resistance is proposed based on the assumption that the lateral resistance of cracked rock (after the peak point) should not be smaller than the lateral resistance of heavily weathered rock estimated from the weak-rock (WR) and Liang et al. p-y curves. The effectiveness of the modified SR curves is evaluated against the results of a lateral load test. The modified SR curves are compared against back-calculated p-y curves from the lateral load test.

Description

this is the author’s version of a work that was accepted for publication in IFCEE 2018. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in IFCEE 2018 (pp. 142 151) and can be found online at: https://doi.org/10.1061/9780784481578.015

Conference Information IFCEE 2018 March 5–10, 2018 | Orlando, Florida.

DOI
10.1061/9780784481578.015
Persistent Identifier
https://archives.pdx.edu/ds/psu/26611
Citation Information
Arash Khosravifar and Zia Zafir. "Minimum Required Length for Geotechnical Lateral Stability of RockSocketed Pile Shafts" (2018) p. 142 - 151
Available at: http://works.bepress.com/arash-khosravifar/5/