ABSTRACT
Within the last twenty years on the one hand we have observed enormous interest in in-situ tests on the part of geotechnical engineers, while on the other hand-we have seen considerable advances in the technological development of equipment used in these tests and in terms of interpretation of results. These achievements have been documented in the recent years in several monographs, e.g. Lunne et al. (1997), Schnaid (2009), proceedings from professional conferences, e.g. Fonseca, Mayne (2004), Huang (2008), Mayne et al. (2008), Failmezegas, Anderson (2006), Robertson (2010) as well as studies of fundamental importance, which provided significant contribution to the concept of the theoretical description and interpretation of results from in-situ testing. In this respect we need to mention studies by Jamiołkowski (2001), Robertson (1990, 2009), Mayne (2001, 2007) and Lunne et al. (1997).
