MODIFICATION OF PILE CAPACITY AND LENGTH PREDICTION EQUATIONS BASED ON HISTORICAL ALABAMA PILE TEST DATA

Pile capacity predictions by dynamic formulas, wave equation analyses, and soil mechanics methods are compared with actual failure test results from Alabama and surrounding southeastern states. The purposes of the comparisons are to determine the relative accuracy of the equations and to modify them to improve these accuracies. Effects of pile type, hammer type, and soil setting on the dynamic formulas are included. A computerized solution of the pile wave equation is investigated for accuracy nd sensitivity to soil parameters. Recommended values of the program parameters are determined for Alabama soil conditions and the program employed to predict the capacity of a number of Alabama piles. These predicted capacities are compared with actual failure loads. Soil mechanics methods of pile capacity prediction are evaluated to fit the available pile failure data. Use of the soil mechanics approach to estimate pile length requirements is also demonstrated. Other methods of estimating pile length requirements are investigated and evaluated.

  • Supplemental Notes:
    • Prepared by Auburn Univ., Ala. Engineering Experiment Station.
  • Corporate Authors:

    Alabama State Highway Department

    11 South Union Street
    Montgomery, AL  USA  36130

    Auburn University

    Engineering Experiment Station
    Auburn, AL  USA  36849
  • Authors:
    • Ramey, G E
    • Hudgins, A P
  • Publication Date: 1975-6

Media Info

  • Pagination: 391 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00143019
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: HPR-75 Final Rpt.
  • Files: NTIS, TRIS, STATEDOT
  • Created Date: Oct 6 1976 12:00AM