Investigation of the Liquefaction Potential of Saturated Sands at Low Levels of Excitation and Earthquake Shaking

本研究对低水平地震动引起的土壤液化现象进行了研究。到目前为止，关于土壤液化的工程研究结果对地震烈度和土壤液化之间的关系的了解有限。一般的假设是，液化发生在高烈度地震时(例如，在修正的梅塞利烈度表中高于烈度VI)。对这一现象的研究可能会为理解液化过程提供新的见解。将对非常松散到中等密度的饱和砂土进行循环三轴压缩试验，并确定触发液化的条件。将试验数据与中等水平地面震动下的液化分析结果进行关联。结果将确定初始应力条件和叠加动应力对斜坡渐进破坏可能性的影响。

This study investigates the phenomenon of soil liquefaction induced by low levels of ground shaking. The results of the engineering research on soil liquefaction, to date, provide only a limited understanding of the relationship between the earthquake intensity and soil liquefaction. The general assumption is that liquefaction occurs at high earthquake intensities (for example, above intensity VI in Modified Mercelli Intensity Scale). An investigation of this phenomena is likely to provide new insight into understanding the liquefaction process. A labortory test program will be conducted of cyclic triaxial compression tests on very loose to medium dense saturated sands and conditions will be determined that will trigger liquefaction. A correlation of the experimental data will be made with the analysis results of liquefaction at moderate levels of ground shaking. The results will establish the initial stress conditions and the effects of superimposed dynamic stresses on the potential for progressive failure of slopes.