Landslides
Online ISSN : 1884-3956
Print ISSN : 0285-2926
ISSN-L : 0285-2926
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Volume 10, Issue 4
Displaying 1-4 of 4 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1974 Volume 10 Issue 4 Pages 1-3_1
    Published: March 25, 1974
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.10.4_1
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Studies on the Dynamical Properties of Landslide Face and their Soil Tests
    Bungo TAMADA
    1974 Volume 10 Issue 4 Pages 4-11_1
    Published: March 25, 1974
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.10.4_4
    JOURNAL FREE ACCESS
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    When stratum (one or two material layers) slips along the water film surface, a thin layer of disturbed clay is formed on the water film surface by rubbing action. These disturbed clay had been called “Land slide clay” But landslide clay is not the cause of landslide occurrences but the result of slips. It is necessary for preventing landslide to understand the shear properties of thin disturbed clay.
    The shearing characteristic of disturbed clay on the slide face is changed every moment by sliping conditions. The shearing resistance under unconsolidation-undrain conditions changes slowly into shearing resistance under consolidation-undrain conditions.
    On the one side, the thickness of disturbed clay on the sliding face is a thin layer (from a layer 1-10 mm thick), and these soil samples are collected at the test pits. Accordingly, it is necessary to reconsider the method of soil test which has been adopted.
    This paper is to report that the results of shearing characterestics of disturbed clay have been obtained by new experimental attempt and apparatus, and these results can be applied to the preventing landslide.
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  • T. S. W. technique
    Masaatsu OZAKI
    1974 Volume 10 Issue 4 Pages 12-18_1
    Published: March 25, 1974
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.10.4_12
    JOURNAL FREE ACCESS
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    For a prevention work of the slope collapse in the steep slopes, various techniques such as the concrete wall technique, the concrete block piling wall technique and the concrete covering wall technique etc. are used. The actual carrying out of these techniques necessarily accompanies various works, for example, the conveyance of soil and sand produced by the cutting, the maintainance of cutting surfaces and the carriage of largesized machineries: in some place, these works are often difficult to be practiced. A new technique devised for making these works practicable and hightening the effect of prevention of the slope collapse is presented.
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  • On Some Problems about the Safety Factor of Landslide
    Shinichi YAMAGUCHI
    1974 Volume 10 Issue 4 Pages 19-22_1
    Published: March 25, 1974
    Released on J-STAGE: June 28, 2010
    DOIhttps://doi.org/10.3313/jls1964.10.4_19
    JOURNAL FREE ACCESS
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    At first, the calculation method that C and φ are obtained from the fifure of slope and the location of slide surface is explained.
    Next, the relation between the probability of slope failure and safety factor is calculated . We must use the probability idea instead of the safety factor in determining the degree of control works by economical judgement. Further, it is noticed that the dispersion from the mean value is important in probability decision.
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