SOILS AND FOUNDATIONS
Online ISSN : 1881-1418
Print ISSN : 0038-0806
Volume 10, Issue 4
Displaying 1-3 of 3 articles from this issue
  • SHIN-ICHIRO MATSUO, MAMORU FUKUTA, KAZUHIKO NISHIDA
    1970 Volume 10 Issue 4 Pages 1-9
    Published: 1970
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
    A study of the consistency of decomposed granite soils was made by a new method based on the slump test. It is shown that the degree of weathering and mineral composition which play a significant role in the classification of the decomposed granite soils can be well represented by the consistency according to this method, and that the consistency is closely related to engineering properties such as compaction and permeability.
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  • Kenji ISHIHARA
    1970 Volume 10 Issue 4 Pages 10-38
    Published: 1970
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
    On the basis of the information concerning the compressibilities of water, solid particle and solid skeleton, the material constants appearing in the theory of water-filled porous elastic materials developed by M. A. Biot were computed and their order of magnitude was examined. Such check-up permitted to simplify considerably the theory for the case of dynamical problems and led to wave equations which are identical in form with those derived for the elastic theory. This shows that the elastic theory can serve as a substitute for the poro-elastic theory, especially when the latter is associated with the undrained condition like dynamical problems. Young's modulus and Poisson's ratio in the equivalent elastic theory were related with the constants of the materials constituting a two-phase porous medium. Furthermore, the expression for the pore pressure coefficient B proposed by A. W. Skempton was derived and extended to the case of one-dimensional compression. Finally, a relationship between Poisson's ratio and the pore pressure coefficients was disclosed.
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  • AKIO NAKASE
    1970 Volume 10 Issue 4 Pages 39-64
    Published: 1970
    Released on J-STAGE: February 29, 2008
    JOURNAL FREE ACCESS
    Stability of low embankments with arbitrary surcharge is examined by assuming that the φ=0 analysis is applicable and the undrained shear strength increases linearly with depth. Also it is assumed that a vertical tension crack develops in the fill above the point at which the slip surface emerges from the foundation soil. A stability chart is compiled from the result of analysis. By applying to the stability analysis of two case records, the accuracy of this stability chart is found to be satisfactory.For the case where the thickness of cohesive soil stratum is limited, the stability is analysed by assuming either circular and plane slip surfaces, and a stability chart is compiled.Stability chart for the embankment with vertical face is also compiled in order to make rough estimate of stability of earth structures such as sheetpile bulkheads.
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