1. Geotechnical Engineer, Mott MacDonald Ltd, Geotechnical Division, Mott MacDonald House, 111 St Mary's Rd, S24AP, Sheffield, UK, Telephone: +44 (0) 114 276 1248; Telefax: +44 (0) 114 2724699; E-mail: emilia.belczyk@mottmac.com
2. Senior Lecturer, Department of Civil and Structural Engineering, University of Sheffield, Sir Frederick Mappin Building, Mappin Street, S1 3JD, Sheffield, UK, Telephone: +44 (0) 114 222 5717; Telefax: +44 (0) 114 222 5700; E-mail: c.c.smith@sheffield.ac.uk