COMPARISON OF METHODS FOR ESTIMATING PILE CAPACITY. FINAL REPORT
A comparative study of ten pile driving formulas is described. The formulas are the Danish, ENR, Modified ENR, Eytelwein, Gates, Hiley, Janbu, Navy-Mckay, PCUBC, and Weisbach. The ultimate load for each of sixty-three pile load tests was determined using the Q-D over 30 method to determine ultimate capacity. The predicted pile capacity was divided by the measured capacity to obtain normalized values. Statistical analyses for coefficient of variation were performed on the logarithm of the normalized capacities to determine which formula provided the most consistent prediction of pile capacity. The Gates formula proved to be the best and the widely used ENR one of the worst with a coefficient of variation approximately 2-3 times higher than that for the Gates formula.
- Record URL:
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Corporate Authors:
Washington State University, Pullman
Department of Civil and Environmental Engineering
P.O. Box 642910
Pullman, WA United States 99164-2910Washington State Department of Transportation
Transportation Building, 310 Maple Park Avenue SE, P.O. Box 47300
Olympia, WA United States 98504-7300Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- FRAGASZY, R J
- Higgins, J D
- Argo, D E
- Publication Date: 1988-8
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: 62 p.
Subject/Index Terms
- TRT Terms: Alternatives analysis; Estimating; Formulas; Measurement; Statistical analysis; Support piles
- Old TRIS Terms: Pile bearing capacities; Pile formulas
- Subject Areas: Bridges and other structures; Data and Information Technology; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00478207
- Record Type: Publication
- Report/Paper Numbers: WA-RD 163.1
- Contract Numbers: Y3400, Task 9
- Files: TRIS, USDOT, STATEDOT
- Created Date: Dec 31 1988 12:00AM