Development of LRFD Recommendations of Driven Piles on Intermediate Geomaterials

This study aims to improve the efficiency of driven piles in intermediate geomaterials (IGMs) to increase the reliability of pile foundations for bridge structures. Test pile data collected from the seven state departments of transportation (DOTs) and total 223 pile load test data are evaluated to provide recommendations for driven piles in IGMs. A classification method to differentiate fine-grained soil from fine-grained IGMs (FG-IGMs) is established. Shales are classified depending on their weathering conditions, mechanical properties, and measured pile resistances. Newly static analysis (SA) methods for predicting unit shaft resistance (qₛ) and unit end bearing (qb) are proposed and validated for both FG-IGMs and shales. The statistical assessment concludes that the proposed SA methods provide more accurate predictions of qₛ and qb and yield higher Load and Resistance Factor Design (LRFD) resistance factors than those of the existing SA methods. A back-calculation procedure is adopted to yield recommended dynamic parameters for shale, which are incorporated into a proposed Wave Equation Analysis Program (WEAP) method. An economic study reveals that the proposed WEAP method yields the least excess steel weight, on average, during construction, which will alleviate construction challenges encountered in the current practice, such as higher construction cost and longer construction duration.

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  • Supplemental Notes:
    • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
  • Corporate Authors:

    University of Wyoming, Laramie

    Department of Civil & Architectural Engineering and Construction Management
    Laramie, WY  United States 

    University of Wyoming, Laramie

    Department of Mathematics & Statistics
    Laramie, WY  United States 

    Mountain-Plains Consortium

    North Dakota State University
    Fargo, ND  United States  58108

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Authors:
    • Ng, Kam
    • Masud, Nafis
    • Oluwatuyi, Opeyemi
    • Wulff, Shaun S
  • Publication Date: 2022-8


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 103p

Subject/Index Terms

Filing Info

  • Accession Number: 01863710
  • Record Type: Publication
  • Report/Paper Numbers: MPC-22-478
  • Contract Numbers: MPC-651
  • Created Date: Nov 16 2022 9:46AM