Author(s): Fumihiro Hara; Yasuhiro Okubo; Hiroshi Saeki; Hazime Yamaguchi
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Abstract: Rivers or lakes that freeze during winter are found in many parts of the world. In Japan the Hokkaido area is especially affected by such freezing. Freezing over of rivers creates problems of abrasion of bridge piers, and floods caused by ice jams when the snow melts. In artificial lakes created by dams, it is known that the ice force acts on structures, such as intake towers, in a horizontal direction due to ice sheets and in a vertical direction due to changes in water level. In order to estimate the amount of abrasion of pier surface caused by the movement of ice sheets, to take preventive measures against abrasion and to clarify the ice force acting on various hydraulic structures, the ice strength must be clearly understood. We conducted compression tests in the Teshio River in Hokkaido and measured the unconfined compressive strength and the compressive elastic ratio of ice floes, using ice sampled from the ice sheets in the river.
Year: 1994