Recalibration of Axial Pile Capacity Methods

The Lehane et al. (2017) pile load test (PLT) database (new PLT database) is one of the results of a joint industry project (JIP) to investigate the reliability of (CPT based) axial pile capacity methods for driven piles. The database contains results of high quality axial load tests of piles in sand and clay. This database was used to recalibrate five pile design methods for axial pile capacity of offshore piles. The methods considered were: For sand: Fugro-05 (Kolk et al., 2005) Fugro-05 (ISO, 2016)   For clay: Kolk and van der Velde (1996) Centre for Civil Engineering Research and Codes (CUR, 2001) Van Dijk and Kolk (2010) The recalibrated methods obtain a lower coefficient of variation (COV) and a better prediction of the mean of the measured capacity of the PLTs of the new PLT database and hence they can be considered more reliable than the original methods.