Pile dynamics is the analysis of piles and pile-soil systems subjected to dynamic loads. It is used to establish a relationship between the static resistance and driving resistance, to obtain bearing charts that confirm pile capacity from the driving conditions, to assist in the choice of the driving system, and to ensure pile integrity after installation.
Driving Resistance is the resistance to pile penetration.
Pile Integrity is the condition of the pile after installation. It may be assessed by doing a pile integrity test which checks for the presence of defects along the pile shaft. A small hammer is used to impact the head of the installed pile, and reflections of traveling waves in the pile are analyzed to assess integrity.
Velocity of wave propagation is the velocity of the wave traveling through the pile.
The Case Method was developed based on measurements of force and velocity recorded at the pile head during a hammer blow. These records are used to estimate the pile resistance by assuming that shaft and base resistance are lumped at the pile base.
Wave Equation Analysis is the solution of the wave equation applied to pile driving. A hammer blow is analyzed as it travels as a wave down the pile. This analysis is used to establish a relationship between pile static resistance and pile driving resistance among other things.
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