PILE DRIVING BY MEANS OF LONGITUDINAL AND TORSIONAL VIBRATIONS.
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
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This report discusses vibratory pile driving with particular emphasis on pile driving at resonance where maximum driving efficiency can be expected. The theories and concepts associated with longitudinal and torsional pile driving are presented to show that torsional resonance does not appear to be as effective a method as longitudinal resonance and that considerable variations can exist between calculated and observed resonant frequencies. While it is pointed out that equations by Bernhard and Kovacs predict pile resonance in close agreement with that observed during actual pile driving, it is also suggested that these equations be subjected to a more rigorous evaluation to determine whether they can predict the resonant frequency of all force generator - column systems. Author
- Structural Engineering and Building Technology