© 2015 Taylor & Francis Group, London. This paper presents the results and interpretation of a series of centrifuge tests performed to model the extraction of stiffened and unstiffened suction caissons in Angola clay. Parameters investigated during the testing programme included (i) the setup time after installation, which varied between 0 and 360 days, and (ii) the extraction rate, which spanned over three orders of magnitude. The interpretation revealed fundamental aspects of the caisson behaviour notably associated with the installation soil kinematics, and its influence during the subsequent extraction on both the internal and external friction, and their evolution with setup time.The effect of setup time can be reasonably approximated using conventional cavity expansion theory followed by radial consolidation.The effect of the extraction rate can be assessed using a total stress analysis but accounting for both strain rate effects and consolidation occurring while mobilising the peak extraction resistance. Recommended friction factors and bearing capacity factors are provided accounting for the parameters investigated.
|Title of host publication||Frontiers in Offshore Geotechnics III - Proceedings of the 3rd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2015|
|Publisher||Taylor & Francis|
|Publication status||Published - 2015|
|Event||Suction caisson extraction resistance in Gulf of Guinea clay - Oslo, Norway|
Duration: 1 Jan 2015 → …
|Conference||Suction caisson extraction resistance in Gulf of Guinea clay|
|Period||1/01/15 → …|