1. Institute of Soil Mechanics, Foundation Engineering and Computational Geotechnics, Graz University of Technology, Rechbauerstraße 12, 8010 Graz, Austria
2. Norwegian Geotechnical Institute, Sandakerveien 140, 0484 Oslo, Norway (Corresponding author), e-mail: s.oberhollenzer@tugraz.at, https://orcid.org/0000-0002-7081-1795
3. Studio Prof. Marchetti Srl, Via Bracciano 38, 00189 Rome, Italy, https://orcid.org/0000-0002-2544-3575