Scour and sedimentation induced changes to the embedment and spanning of offshore pipelines are examined using field data. A novel Image analysis approach has been developed to unlock local bathymetry from older video survey footage. Pipeline sinking and sagging mechanisms have been observed, and explained. The importance of direct sedimentation against the pipeline has been highlighted, and its time scale quantified through physical modelling tests. The importance of soil variability, water depth, pipeline orientation, and metocean conditions is quantified. The potential design improvements using this knowledge are demonstrated through increased lateral resistance and sheltering, benefitting on-bottom stability and temperature management.
|Qualification||Doctor of Philosophy|
|Award date||8 Nov 2016|
|Publication status||Unpublished - 2016|