抄録
Many rivers flowing through the cold region are ice-covered in winter. At these rivers, the phenomenon that a group of ice foes accumulates in the river section, during the process of ice-cover and break-up, occurs. And this phenomenon called ice jam. The ice jam makes the decrease of section product of the river, and cause a flood. Moreover, when ice jam is made at the front of the river structures, it acts the ice force and produces localized scour of river bottom and causes collapse of structures. This phenomenon is indispensable condition for the design of river structures constructed at cold region. When the ice floes arrive at floating obstacle, the ice floes will either submerge under the obstacle or remain at the edge of the obstacle. The submerged ice floes form the ice jam. This paper reports the study on the stability of ice floes at the edge of the obstacle that have important meaning in the process of ice jamming.
