1. Research Fellow, Infrastructure Research Group, School of Engineering, Univ. of Southampton, Southampton SO17 1BJ, UK.
2. Senior Research Fellow, Infrastructure Research Group, School of Engineering, Univ. of Southampton, Southampton SO17 1BJ, UK (corresponding author).
3. Associate Professor in Geomechanics and Deputy Head of the Infrastructure Research Group, School of Engineering, Univ. of Southampton, Southampton SO17 1BJ, UK.
4. Professor of Geotechnical Engineering, School of Engineering, Univ. of Southampton, Southampton SO17 1BJ, UK.