This volume contains a collection of 122 papers, six reports on Symposium themes, two reports on special lectures and notes on the technical discussion sessions, presented at the Fifth International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground held in Amsterdam (The Netherlands), 15-17 June 2005. The symposium was organized by the Technical Committee 28 Underground Construction in Soft Ground of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). This is the latest in a series, which began in New Delhi in 1994 and was followed by symposia in London (1996), Tokyo (1999) and Toulouse (2002). The Amsterdam Symposium was sponsored by the Dutch Public Works Department (Rijkswaterstaat) and by various national and international companies.