Geotechnical engineering for transportation infrastructure : theory and practice, planning and design, construction and maintenance : proceedings of the Twelfth European Conference on Soil Mechanics and Geotechnical Engineering, Amsterdam, Netherlands, 7-10 June 1999 : additional volume /: theory and practice, planning and design, construction and maintenance : proceedings of the Twelfth European Conference on Soil Mechanics and Geotechnical Engineering, Amsterdam, Netherlands, 7-10 June 1999 : additional volume. (2017)