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本文通过对饱和尾矿砂在振动单剪仪上的排水试验,量测了试样在周期荷载下的体积变化。通过相关分析得出了体积应变增长速率与周期荷载和初始剪应力之间的规律,从而得到了孔隙水压力增长率的表达式。并以此对饱和尾矿砂的液化势进行了推算,所得的结果与试验极为一致。因此,本文为用有效应力的观点对地基、斜坡、土坝进行动力稳定分析和液化判断提供了一个可以实施的方法。
In this paper, the volumetric change of the sample under cyclic loading is measured by the drainage test of the saturated tailings sand on the vibration single shear instrument. The correlation between volumetric strain growth rate, cyclic loading and initial shear stress was obtained through correlation analysis, and the expression of pore water pressure growth rate was obtained. Based on this, the liquefaction potential of saturated tailings sand was calculated and the results obtained were in good agreement with the tests. Therefore, this paper provides a feasible method for dynamic stability analysis and liquefaction judgment of foundations, slopes and earth dams from the viewpoint of effective stress.