Assessment of time effects on capacities of large-scale piles driven in dense sands

This paper considers the axial resistances of open-ended, highly instrumented, 763 mm diameter steel pipe piles driven in sands for EURIPIDES (EURopean Initiative on PIles DEnse Sands) project at a well-characterized research site Eemshaven, northern Netherlands. It offers new analyses previously unreported dynamic tests and their relationship with four heavily instrumented static compression tests. Rigorous signal matching employing two distinct pile–soil interaction models is reported, supported by careful sensitivity analyses, to interpret recorded driving signals. The back-calculated shaft resistance profiles show good agreement between as well calculations performed global wave equation analysis approach. study highlights need account internal soil column resistance. combined interpretation test data indicates 50% gain over 10 days after threefold capacity growth total period 533 driving. outcomes have important implications pile design field quality monitoring; case history contributes an benchmark long-term set-up trends.