Acta Scientiarum Polonorum

Abstract: Usefulness of in situ tests due from the correct interpretation of received results. Such interpretations are obtained from the correlation, developed for similar conditions, supported by laboratory tests and regional experience. In Poland since 2002 a standard PN-B-04452 “Geotechnics-Field tests” exist. This document in assumptions was established as the harmonized standard from EC 7, where in annexes a lot of correlations for Polish conditions can be found. They derived from long-standing experience and results, where many research centre’s had a participation in examinations. Applicable comparison will be presented in the paper applied in practice and given in the PN-EN 1997-2 standard methods of interpretation of results get from known and applied field methods (DP, CPT, or DMT). Differences and dilemmas, faced by the Geotechnical Designer at the stage of appointing parameters for the design, will be discussed, supported by interesting practical examples.