1999 · M. Akchiche, Ramdane Bahar · Twelfth European Conference on Soil Mechanics and Geotechnical Engineering (Proceedings)The Netherlands Society of Soil Mechanics and Geotechnical Engineering; Ministry of Transport, Public Works and Water Management; A.P. van den Berg Machinefabriek; Fugro N.V.; GeoDelft; Holland Railconsult