The recently developed instrumented Becker penetration test (iBPT) when configured as a reusable test pile provides direct measurements of strain and acceleration at up to five locations along the drill string. This paper describes details of the test system, measurements, and presents representative results from an iBPT sounding performed at a predominantly fine sand site where indicator test piles were previously installed. The ability of the iBPT system to estimate equivalent SPT N_(60) values at the site is first demonstrated. Representative iBPT pile driving analysis (PDA) measurements obtained from the multiple modules at the base and along the shaft during field driving is then presented. Finally, a new multistage signal matching approach for estimating the distribution of resistance along the pile, and pile ultimate capacity is demonstrated using individual iBPT module dynamic measurements.
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