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    STP923

    Dynamic Pore-Water Pressure in Saturated Dense Sands

    Published: 0


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    Abstract

    In this paper, the law of generation of pore-water pressure in saturated dense sands under uniform cyclic loadings has been studied. Specimens of Cheng-te fine sands with relative density Dr = 0.77 have been tested in a dynamic triaxial apparatus of electromagnetic type under different initial stress states. The experimental results show that under cyclic loadings dense sands also tend to become denser, so the residual pore-water pressure increases as the number of cycles increases, and the relationship between pore-water pressure ratio γu and cyclic number ratio γN may be expressed by a logarithmic function, whereas the cyclic variation of pore-water pressure about a residual pore pressure curve is approximately close to a sine function with the average amplitude depending on the number of cycles to failure. It also has been found that the residual pore-water pressure at failure is always less than confining pressure σ3 and is inversely proportional to the ratio of consolidation stresses Kc.

    Keywords:

    liquefaction, pore pressures, sands, soil dynamics, dynamic soil properties


    Author Information:

    Zhou, J-X
    Associate professor and engineer, Tsinghua University, Beijing,

    Zhou, K-J
    Associate professor and engineer, Tsinghua University, Beijing,


    Committee/Subcommittee: D18.09

    DOI: 10.1520/STP18409S