Analysis of wall and ground movements due to deep excavations in soft soil based on a new worldwide database

This study is based on an extensive database of more than 530 current international case histories on deep excavations mostly in soft soils. The measured retaining wall and ground movements of all excavations were analysed, taking into account the subsurface and groundwater conditions, the geometric boundary conditions as well as the support system and the excavation method used in each case. By means of the database an empirical analysis of the behaviour of excavation support systems is performed and the main factors affecting the behaviour of deep excavations are examined. Special focus is set on identification of relationships between wall and ground movements, the support system employed and the excavation method used. The results are compared with previous empirical studies.