Time-dependent deformation of anchored excavation in soft clay

Abstract

Excessive movement of excavation support system may result in construction delays and damages to underground services, roads and near-by buildings. It was observed in the field that after excavation, the support system continue to deform even though there was no further excavation. In this paper, the time-dependent deformation of anchored excavation in soft clay was analysed by using a fully coupled consolidation analysis with elasto-plastic soil model. Computed deformation of the excavation support system was found to be in close agreement with field performance of an anchored sheet pile wall which was carefully monitored during excavation.