Graduate Thesis Or Dissertation
 

Penetration resistance predictions for driven piling

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  • This paper presents a method of predicting penetration resistance for driven piles, using known driving records for driving the same type piling in similar subsurface conditions. As known driving records are not always available to the analyst, a method was also investigated using soil data only. The analytical tools employed included the Tilley pile driving formula and the wave equation, as programmed for computer solution by T. C. Edwards. Predictions were made for five projects where driving records were available for two different hammers. Predictions were made for one hammer using a statistically determined mean driving record of the second hammer, and vice-versa. Predictions were also made using only soil data for both hammers. In comparing the predicted values with the actual mean field values, it was found that reliable penetration resistance versus depth relationships could be predicted using a known driving record with either the Hi ley formula or the wave equation. Predictions made using only soil data were found to be reasonable, though significantly more inaccurate than those using a known driving record. Where only soil data was used, it was found that the wave equation is a better predictive tool than the Hiley formula.
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