Experimental results on the formation of hard compacted snow in Rikubetsu in northern Japan: A first step toward the construction of a compacted-snow runway on the Antarctic ice sheet

元データ 国立極地研究所

概要

This paper describes the experimental methods and results on the formation of hard compacted snow in Rikubetsu in northern Japan during the winter of 1999. This basic research was the first step towards the construction of a compacted-snow runway on the Antarctic ice sheet. In Rikubetsu, we constructed three test fields (20 m in length, 7 m in width, and 0.4-1.0m in thickness) on compacted basal snow (approximately 0.05m in thickness). First, 0.1-0.35-m-thick layers of snow were deposited on the basal snow of the fields using a rotary snowplow. Next, the surface snow was smoothed using an excavator. Finally, the snow layers were compacted four times using a bulldozer. This entire process was repeated three to four times in order to construct 0.4-1.0-m-thick test fields. The ram hardness, snow density, and snow structure of these fields were investigated. A comparison with criteria established by a U.S. scientist for a large aircraft-such as the C-130(Abele,1990)-revealed that if snow in the form of three 0.2-0.25-m-thick layers is compacted four times by a bulldozer, it is sufficiently hard to serve as a runway at H68(69°11´29″S, 41°03´34″E, 1204m a.s.l) for a wheeled C-130. The Japanese Antarctic Research Expedition plans to conduct a feasibility study on the construction of the hard compacted-snow runway at this location.

著者

Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
TAKAHASHI Shuhei Department of Mechanical and Systems Engineering, Gifu University
亀田 貴雄 北見工大
Shiraiwa T Disaster Prevention Research Institute Kyoto University
Watanabe O National Institute Of Polar Research Research Organization Of Information And Systems
Watanabe Okitsugu National Institute Of Polar Research
Saito T Institute Of Low Temperature Science Hokkaido University
亀田 貴雄 北見工業大学
Kameda T Kitami Inst. Technol. Hokkaido Jpn
Kameda Takao Department of Civil Engineering, Kitami Institute of Technology
Hyakutake Kinji Department of Civil Engineering, Kitami Institute of Technology
Kikuchi Noriaki Rikubetsu Cold Technology Research Institute
Hyakutake Kinji Department Of Civil Engineering Kitami Institute Of Technology
Watanabe Okitsusgu National Institute of Polar Research
Takahashi Shuhei Department Of Civil Engineering Kitami Institute Of Technology
Kameda Takao Institute Of Low Temperature Science Hokkaido University
Kawamura Toshiyuki Department Of Applied Physics Faculty Of Engineering Hokkaido University:(present Address)institute
Kameda Takao Department Of Applied Physics Faculty Of Engineering Hokkaido University:(present Address)institute
Suzuki T Department Of Earth And Environmental Sciences Faculty Of Science Yamagata University
Kameda T Department Of Civil Engineering Kitami Institute Of Technology
TAKAHASHI Shuhei Department of Applied Chemistry, School of Science and Technology, Meiji University

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