A Model Test of the Sloping Snow-cover
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概要
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It is well known that the creep movement and the snow-pressure of the sloping snow-cover were experimentally and theoretically analysed by Dr. R. Haefeli<SUP>*-11</SUP>. Similar studies have been pursued by several researchers in Japan, too since the winter of 1942-43.<BR>The present paper is composed of three parts : first the history of the studies on sloping snow-cover in Japan, secondly the joint study carried out in cooperation with Forest Experiment Station last winter at TOKAMACHI by using “ranked poles, ” and finally the preliminary experiment of a model test begun at The Snow Experiment Station, SHIOZAWA, utilizing the shelter room with openable roofs for introducing snow fall.<BR>The behavior of the sloping snow-cover is influenced by the following four groups of factors : <BR>1. Climatic condition Radiation, temperature, humidity. wind etc.<BR>2. Snow-cover condition Weight and depth of snow-cover, manner of deposition, properties and construction of strata etc.<BR>3. Terrain condition Inclination, direction and length of slope etc.<BR>4. Body condition Location on the pole, distance detween the poles, etc., with the limitation that the objects are confine to cases of a single pole and ranked ones.<BR>So long as it is a field observation, it will be impossible to vary artificially these conditions except the last one, this fact obstructs the development of our analytical studies. In oder to overcome these difficulties, a model test was resorted to.<BR>It was confirmed that by making such a model test as Fig. 3, not only the conditions would become artificially variable, but also the observation of the two main quantities to be measured, disturbance of the creeping around the body and the snow-pressure acting on it, would be more easy and accurate.
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関連論文
- A Model Test of the Sloping Snow-cover
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