The liquefaction and displacement of highly saturated sand under water pressure oscillation |
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| Authors: | Xiaobing Lu Peng Cui |
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| Institution: | a Institute of Mechanics, Chinese Academy of Sciences, 100080 Beijing, China
b Institute of Mountain Hazard and Environment, Chinese Academy of Sciences, 610041 Chengdu, China |
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| Abstract: | In order to investigate the characteristics of water wave induced liquefaction in highly saturated sand in vertical direction, a one-dimensional model of highly saturated sand to water pressure oscillation is presented based on the two-phase continuous media theory. The development of the effective stresses and the liquefaction thickness are analyzed. It is shown that water pressure oscillating loading affects liquefaction severely and the developing rate of liquefaction increases with the decreasing of the sand strength or the increasing of the loading strength. It is shown also that there is obvious phase lag in the sand column. If the sand permeability is non-uniform, the pore pressure and the strain rise sharply at which the smallest permeability occurs. This solution may explain why the fracture occurs in the sand column in some conditions. |
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| Keywords: | Saturated sand Liquefaction Ocean wave Pore pressure oscillation |
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