Resistance Factors for Pile Foundations

1. After October 2007, bridges must be designed by the AASHTO LRFD Specifications. 2. The LRFD Specifications have higher design loads than previous allowable design methods. 3. LRFD design is based upon ultimate loads and resistance factors. 4. Piles are driven according to the Standard Construction Specifications. which is based upon allowable design loads. 5. Bridge Design is using the higher LRFD loads but has been unable to make better use of resistance factors due to the limitations in our design and construction practices that affect both the structural and geotechnical pile capacity. 6. Because of the above factors, more or longer piles for bridge foundations are necessary, which results in unnecessarily more expensive foundations than previously used. 7. Better and more accurate resistance factors are needed. The main goal of this research will be to :  Re-calibrate pile capacities to the LRFD Design Specifications;  Investigate more cost effective and reliable methods of determining pile capacity through the use of resistance factors developed for Arkansas soils, pile load testing, other driving methods and formulas, etc.; and  Make recommendations for programs to implement each of these methods.


    • English


    • Status: Active
    • Contract Numbers:


    • Sponsor Organizations:

      Federal Highway Administration

      Department of Pavement Technology, HIPT-10
      1200 New Jersey Avenue, SE
      Washington, DC    20590
    • Project Managers:

      Hanning, Chris

    • Performing Organizations:

      Arkansas State Highway and Transportation Department

      Bridge Division, P.O. Box 2261
      Little Rock, AR  United States  72203
    • Principal Investigators:

      Tribo, Jim

    • Start Date: 20081130
    • Expected Completion Date: 0
    • Actual Completion Date: 20091201
    • Source Data: RiP Project 18651

    Subject/Index Terms

    Filing Info

    • Accession Number: 01543076
    • Record Type: Research project
    • Source Agency: Arkansas State Highway and Transportation Department
    • Contract Numbers: TRC-0904
    • Files: RiP
    • Created Date: Nov 4 2014 1:01AM