弾性論的に見たなだれの生成
1965 年 34 巻 2 号 p. 124-130
詳細
1965 年 34 巻 2 号 p. 124-130
The snowslide is usually studied by treating the laid snow as being plastic. But in Fukui district, as it seems elastic rather than plastic that is characteristic of colder districts, a simple elastic model of snowslide is conceived with the following conclusions. (1) The magnitude of a moving mass of snow in the form of a snowball, the impact of which against the laid snow is necessary to originate the snowslide, can be estimated. (2) The concerned snow-mass, when it is a broken fragment of a cornice, becomes also computable. With the measured values of mechanical constants of laid snow, the magnitudes of the concerned snow-mass in the above two cases are calculated and are found to be of the same order. This confirms that the snowslide in Fukui district can be explained by the elastic nature of laid snow.
