SOILS AND FOUNDATIONS
Online ISSN : 1881-1418
Print ISSN : 0038-0806
Volume 7, Issue 2
Displaying 1-4 of 4 articles from this issue
  • Eiichi YAMAMOTO, Robert L. KONDNER, Raymond J. KRIZEK
    1967 Volume 7 Issue 2 Pages 1-19
    Published: 1967
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
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  • Yoshiaki YOSHIMI
    1967 Volume 7 Issue 2 Pages 20-32
    Published: 1967
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
    Loose saturated sand was placed in a rigid box, covered with an impervious membrane, and subjected to horizontal vibration while a surcharge was applied on the membrane. The pore water pressure measured at various depths during vibration showed that the process leading to a completely liquefied state consisted of two stages : (1) a period in which the pore pressure at different depths increased uniformly and simultaneously while the sand remained stable, and (2) a very rapid rise in the pore water pressure reaching the value approximately equal to the total stress.The second stage (termed "sudden liquefaction" process) occurred when the effective stress was reduced to a certain value as a result of the first stage (termed "initial compaction" process). The critical effective stress immediately before the sudden liquefaction increased with an increase in the applied acceleration, and the duration of the initial compaction process increased with increasing surcharge and with decreasing acceleration.
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  • Akio NAKASE
    1967 Volume 7 Issue 2 Pages 33-50
    Published: 1967
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
    The accuracy in determining the undrained strength of saturated cohesive soils and its sequence to the result of stability analysis are examined. As for the accuracy in determining the strength, the mechanical disturbance in the whole process from sampling to testing is found to have far greater influence than the effect of stress release in sampling, as far as the unconfined compression strength is concerned.Three case records of failure in cohesive soils are analyzed by considering respectively the maximum, average and minimum values of measured unconfined compression strengh. Results of the analysis show that the occurrence of failure can be explained reasonably by the φu=0 analysis, provided that the distribution of the average unconfined compression strength with depth is considered.
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  • Ryunosin YOSHINAKA
    1967 Volume 7 Issue 2 Pages 51-66
    Published: 1967
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
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