Ice Scour Event [氷による地盤掘削現象] に関する計算モデルの現地への適用性に関する一考察

抄録

Ice-Scour Event is a phenomenon that occurs when deformed ice such as an ice ridge comes into contact with seabed. Ice-Scour has been reported to cause damage to communication cables and water intake pipelines. Our final goal is to develop the method for estimation of scour depth, or optimal depth of a buried structure such as a pipeline in order not to contact an ice keel.
This paper reports on the application of the mechanical model that we had developed to field site. As a result of calculations using the model, orders similar to those in the field observation data-the scour length of several tens of meters to several kilometers and the scour depth of several tens of centimeters to several meters-were found. We also found that the interactions of pack ice/level ice surrounding an ice ridge as a driving force would greatly affect the performance of scour events.