Landslides
Online ISSN : 1884-3956
Print ISSN : 0285-2926
ISSN-L : 0285-2926
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Volume 17, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • On the Koshiozawa Landslide, Oshika Village, Nagano Prefecture, Central Japan
    Shuji KITAZAWA
    1981 Volume 17 Issue 4 Pages 1-9_1
    Published: March 31, 1981
    Released on J-STAGE: February 25, 2011
    DOIhttps://doi.org/10.3313/jls1964.17.4_1
    JOURNAL FREE ACCESS
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    By the field survey up to date we could find some characteristics of the landslide here and a countermeasure against it as follows:
    (1) an incomplete landslide occurred here on a developed fractural zone of crystalline schist on Sanbagawa belt. We may consider it a cataclastic landslide.
    (2) it occurred on one of block-areas divided by several faults and we can estimate several older landslides in this place.
    (3) It formed a scarp, due to jutting of bed fractures swollen by invaded ground water.
    (4) escarpment occurred on a penetrating band of serpentine. We found 2 weak bands like this around here.
    (5) in Koshio valley check dams and simple dams lifted river beds, and infiltrated ground water into the fracture zone.
    (6) as an effective countermeasure we suggest here draining work of ground water at the upper position of stream confronte with the landslide.
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  • Tectotope of Landslide Area in the Vicinity of Higashiyama Fold Zone
    Takahiro TERAKAWA, Toshio WAKU, Shoichi NJSHIDA
    1981 Volume 17 Issue 4 Pages 10-19_1
    Published: March 31, 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_10
    JOURNAL FREE ACCESS
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    The purpose of this report is to discuss the origin and mechanism of landslides in the vicinity of Higashiyama fold zone from the tectonomechanical standpoint. Northern part of Higashiyama anticline is represented as the ansymmetrically overturned anticline, because, the west limb has steep dips and the east limb has gentle dips.
    Here the landslides occur at the different areas. One is the eastern limb and the syncline area, where the origin of landslides is considered solely due to physical and chemical properties of rocks.
    On the other hand, the southern part of Higashiyama anticline is symmetrical, and both limbs have high angles, where landslides occur intermittently along the anticline axis. We concluded that it is based mainly on the structurally disturved anticline.
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  • Time Dependent Behavior of Soil during Direct Shear Creep
    Fujiya Komamura
    1981 Volume 17 Issue 4 Pages 20-27_1
    Published: March 31, 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_20
    JOURNAL FREE ACCESS
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    An equation for creep curve which can be used to characterize the creep behavior of soils is derived from creep test results. The equation which consists of the terms expressing the primary creep, secondary creep and tertiary creep is valid to describe the creep behavior over any time period.
    The time to creep failure under a sustained stress decrease with increase in water content and stress level. The prediction of time to failure in soil creep was discussed by applying the displacement-time equation and the theory of rate process. The equation for prediction of creep failure of soil is derived as a negative exponential function of stress and water content.
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  • Relation of Landslide to Geology in Niigata Prefecture
    Yasumasa FUKUMOTO
    1981 Volume 17 Issue 4 Pages 28-35
    Published: March 31, 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_28
    JOURNAL FREE ACCESS
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  • Erratum to : Relation of Landslide to Geology in Niigata Prefecture
    1981 Volume 17 Issue 4 Pages 35
    Published: 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_35
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  • Investigations on the Damage of Houses due to Collapse of Slopes
    Keizo UGAI, Shoji ISHIBASHJI, Kazunori TAKEHORA
    1981 Volume 17 Issue 4 Pages 36-43_1
    Published: March 31, 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_36
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    The research on the collapses of the slopes which were caused at Niigata Flood Disaster in June 1978 was made with the purpose to clear up the cause and to make appropriate plan of remedial works. Completion of peculior inquiry by witness was performed with affirmation to each collapse. In consequence, we obtained that: foreboding signs are recognized on most slope before cause of the collapse, suffered houses mostly existed near excavated slope, steep slopes experienced collapse were brought by a comparatively small amount of rainfall.
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 17 Issue 4 Pages 44-45
    Published: March 31, 1981
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.17.4_44
    JOURNAL FREE ACCESS
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