Author(s): Shinji Kioka; Ryo Ishikawa; Hiroshi Saeki
Linked Author(s):
Keywords: Ice Scour; Sub-Scour deformation; Ice Ridge; Pipeline; Stress
Abstract: Ice-Scour Event is a phenomenon that occurs when ice comes into contact with seabed. It has been reported to cause damage to cables and pipelines. As well as the estimation of the scour depth, it will be also important to consider a sub-scour deformation, which means soil deformation within the seabed below ice. In addition to our small-scale model tests, we made a medium-scale model test at a sandy plain. The stress within the soil during ice-scouring did not depend on a drift speed of a model ice, and that the restriction due to attack angle was large, which agreed with the small-scale test results. We also found that stress and reaction force greatly depend on relative density of soil. From the small-and medium scale model test results, we clarified the scale effects/similarities concerning reaction forces and stress distributions within the seabed.
Year: 2006