Implementation of the LRFD Geotechnical Strength Limit State for Compression Resistance of a Single Driven Pile

This paper addresses issues and problems facing State DOTs in the development of LRFD design specifications for driven piles based on the 2012 AASHTO LRFD Bridge Design Specifications. It describes with solved example the design procedure to address the geotechnical strength limit state for compression resistance of a single driven pile. Both the static analysis methods (e.g., β-method) and field analysis methods (e.g., dynamic formulas) are used to determine the pile’s nominal bearing resistances at various depths and the pile length. A new procedure is presented to improve the agreement between the pile length estimated in the design and the pile length finalized in the field. The effect of downdrag in the LRFD design of driven piles is discussed. The use of setup, static load tests, and static analysis methods to finalize the pile lengths in the LRFD design are described and their advantages are demonstrated. The results obtained from addressing the geotechnical strength limit state are summarized in a design chart that can be used by the foundation designers to optimize and finalize the LRFD design by determining the design pile length and required field bearing resistance. Finally, a comprehensive LRFD Design Example is solved to demonstrate the development and applications of design charts using a static and three field analysis methods.

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• Supplemental Notes:
  • This paper was sponsored by TRB committee AFS30 Foundations of Bridges and Other Structures. Alternate title: Implementation of LRFD Geotechnical Strength Limit State for Compression Resistance of Single Driven Pile.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Abu-Hejleh, Naser M
  • Kramer, William
  • Mohamed, Khalid
  • Long, James H
  • Zaheer, Mir A
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 22p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Bridge foundations; Design load; Design practices; Design standards; Geotechnical engineering; Load and resistance factor design; Load limits; Pile foundations; Static structural analysis; Support piles
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01551114
• Record Type: Publication
• Report/Paper Numbers: 15-3598
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Jan 27 2015 11:21AM