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

研究了低强度地震动引起的土壤液化现象。迄今为止，关于土壤液化的工程研究成果对地震烈度与土壤液化之间的关系仅提供了有限的认识。一般的假设是，液化发生在高地震烈度（例如，在修正梅尔塞利烈度标度中高于烈度VI）。对这一现象的研究可能为理解液化过程提供新的见解。一个实验室测试程序将在非常松散到中等密度的饱和砂上进行循环三轴压缩测试，并确定触发液化的条件。将实验数据与中震动液化分析结果进行对比。结果将建立初始应力条件和叠加动应力对边坡潜在渐进破坏的影响。

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.