COMPARISON OF FORMULA PREDICTIONS WITH PILE LOAD TESTS

To determine whether the Washington State Department of Transportation should replace the Engineering News (EN) formula with another dynamic formula for estimating pile capacity, the relative performance of 10 pile-driving formulas was studied. Data were collected from 63 pile load tests conducted in western Washington and northwest Oregon. The predicted capacity of each pile was calculated using several formulas: Danish, EN, modified EN, Eytelwein, Hiley, Gates, Janbu, Navy-McKay, Pacific Coast Uniform Building Code, and Weisbach. The Gates formula provided the most consistent prediction of pile capacity for each pile type and soil condition analyzed. The average predicted pile capacity was compared using the Gates and the EN formulas for different levels of safety. For each level of safety chosen, the Gates formula produced a higher average pile capacity. As the level of required safety increased, so did the difference between the two formula predictions.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1989/1219/1219-001.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=COMPARISON+OF+FORMULA+PREDICTIONS+WITH+PILE+LOAD+TESTS&author=R.+Fragaszy&author=D.+Argo&author=J.+Higgins&publication_year=1989
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/030904815X
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1219, Geotechnical Engineering 1989. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Fragaszy, Richard J
  • Argo, Douglas
  • Higgins, Jerry D
• Publication Date: 1989

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-12
• Monograph Title: Geotechnical engineering 1989
• Serial:
  • Transportation Research Record
  • Issue Number: 1219
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Alternatives analysis; Forecasting; Load tests; Pile driving; Piles (Supports); Safety; Structural tests
• Old TRIS Terms: Pile bearing capacities; Pile tests
• Subject Areas: Bridges and other structures; Design; Highways; Safety and Human Factors; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00494761
• Record Type: Publication
• ISBN: 030904815X
• Files: TRIS, TRB
• Created Date: Jun 30 1990 12:00AM