Journal of the Japanese Society of Snow and Ice
Online ISSN : 1883-6267
Print ISSN : 0373-1006
Volume 47, Issue 2
Displaying 1-4 of 4 articles from this issue
  • Relation between vane shear strength and immersion time
    Toshiichi KOBAYASHI
    1985 Volume 47 Issue 2 Pages 55-62
    Published: June 29, 1985
    Released on J-STAGE: July 23, 2009
    JOURNAL FREE ACCESS
    Dry snow samples with density (ρd) of 0.079 to 0.302 g/cm3 were immersed for 3 to 15 minutes in water kept at 0°C, and vane shear strength of them was measured by shear vane tester. The following results were obtained : 1) The vane shear strength of low density snow (ρd<0.2 g/cm3) increased with the lapse time after immersion, but that of high density snow (ρd>0.2 g/cm3) decreased with the lapse time after immersion. 2) The value of vane shear strength of fine grained snow immersed for 3 minutes was less than that before immersion. The value of vane shear strength of new snow immersed for 3 minutes was more than that before immersion. Moreover, the value of vane shear strength of new snow immersed for 15 minutes was 2 to 5 times larger than that before immersion. 3) The heights of cylindrical new snow samples (ρd=0.127 g/cm3) immersed for 8 minutes and 12 minutes were about 60% and 55% of those before immersion, respectively.
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  • Part I : Siting condition of Nagaoka City and snow removal system
    Teruyoshi UMEMURA, Norio HAYAKAWA, Akira OKADA, Yoshihisa KAWAHARAP, K ...
    1985 Volume 47 Issue 2 Pages 63-70
    Published: June 29, 1985
    Released on J-STAGE: July 23, 2009
    JOURNAL FREE ACCESS
    In the present snow-removal and storage system, the snow is removed from an urban area through street-side snow feeders and underground piping system and stored in an artificial pond built in the suburban area. The pond is insulated to store the negative heat until summer when the mixture of cold water and snow is used for air conditioning in the urban area. The study exemplifies Nagaoka City which is noted for heavy snowfall and gives a designed system with snow removal capacity of 5, 000 t/h from the urban area of 16 km2. The designed system includes 5, 500 snow feeders, snow conveying system and storage pond.
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  • Part II : Snow conveying and storage facilities and economy of the system
    Teruyoshi UMEMURA, Norio HAYAKAWA, Akira OKADA, Akiyoshi HONDA, Akio U ...
    1985 Volume 47 Issue 2 Pages 71-78
    Published: June 29, 1985
    Released on J-STAGE: July 23, 2009
    JOURNAL FREE ACCESS
    This paper reports a design work of snow conveying and storage facilities and an economical assessment of the entire system. (1) The proposed system is technologically feasible. (2) The system has enough snow removal capacity to keep snow-free 10 to 36% of service area. (3) The system has enough air conditioning capacity as to accomodate living quarters of service area. This amounts to save 40% of annual electricity consumption. (4) Construction costs 121.7 billion yen which is considered to be rather costly. (5) The research and development of new technology is needed to substantially lower the construction cost.
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  • Jiro ENDO, Shigeo SHIMOTORI, Takeshi MATSUZAKI
    1985 Volume 47 Issue 2 Pages 79-81
    Published: June 29, 1985
    Released on J-STAGE: July 23, 2009
    JOURNAL FREE ACCESS
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