Author(s): P. Liferov; O. T. Gudmestad; S. Loset; T. Molmann
Linked Author(s):
Keywords: No Keywords
Abstract: For design of offshore pipelines in the Arctic, problems related to ice scouring caused by moving ice ridges pose a design challenge in nearshore and shallow water areas. This paper discusses the major challenges and a new solution is presented, implying that the pipelines will be trenched to the depth of the keel of the ridges only, while the pipeline wall thickness will be increased to resist the forces caused by the soil defonnation below the keels. This solution represents a large cost saving compared to deep trenching. Numerical examples are given that document that a 2S % increase in pipeline wall thickness will be sufficient for the Pechora Sea conditions.
Year: 2000