ABSTRACT
Concrete caissons with a diameter of about 30 meter have been used for the construction of a ten-year old quay wall at Antwerp. For the control of the overall stability of the caissons calculations have been performed with the FLAC 3D program. Due to the special type of construction (concrete caisson filled with sand), several difficulties occurred during the modeling. From the performed calculations it could be deduced that: a) the calculated deformations are similar to the measured deformations, and b) the overall stability is influenced by many parameters and is not easy to be determined.
