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PDR, option PDA with combinedacceleration  transducers               vvvgf08yphijn;k


T he objective of  Pile Driving Analysis (PDA) is to control hammer, pile and soil performance during pile driving, whether with an impact or a vibratory hammer. The pile is instrumented with (combined) acceleration and strain transducers near the pile top. The transducers are connected to the PDR monitoring system mounted on the pile, from where signals are transferred either wirelessly by Wifi or an Ethernet cable to a PC-notebook. 

The objective of pile instrumentation is to obtain force and velocity signals as a function of time. The force in the pile at a certain level versus time is derived from the signals of strain transducers, while velocity is derived by integration of the acceleration signals obtained from the accelerometers. With these two independently obtained signals it is possible to make a quick assessment of the energy delivered to the pile, and of the pile driving resistance, while even a rough estimate of the Static Resistance during driving (SRD) can be made.

After the pile has been driven and taking into account a set up period a Dynamic Load Test (DLT, also called PDA Test) can be excuted. A signal matching analysis can be performed by means of the measured signals in order to make an  estimate of the static bearing capacity of the pile. The wave equation program AllWave-DLT has been especially adapted for this purpose