Numerical modelling of ice-seabed interaction in layered seabed ...

• Main Author: hashemi, Seyedhossein
• Format: Text
• Language: English
• Published: Memorial University of Newfoundland 2022
• Subjects: Arctic; Iceberg*
• Online Access: https://dx.doi.org/10.48336/jzjs-ap06; https://research.library.mun.ca/15771/

Traveling icebergs may threat the structural integrity of the offshore pipelines in any territories that they can reach. Arctic offshore pipeline are usually buried for physical protection against ice gouging. Burying the pipeline in a trench immediately deeper than the maximum-recorded ice gouge depth is not sufficient to ensure the safety of the pipeline. The subgouge soil displacement is not limited to the depth of the ice keel tip. The shear resistance of the seabed soil causes the subgouge soil deformation to extend much deeper than the ice keel tip. This, in turn, threats the subsea pipelines and mandates achieving a sufficient burial depth to ensure the structural integrity of the pipeline. Finding the best burial depth satisfying the safety and economical consideration is a challenging aspect. In practice, a decoupled approach is usually undertaken by engineers, where, first, a continuum large deformation finite element analysis of free field ice gouging process is conducted. Then, the results of ...