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

低水平激励和地震振动下饱和砂的液化潜力研究

• 批准号: 8411912
• 负责人: H. Bolton Seed
• 金额: $ 17.52万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-03-01 至 1988-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8411912&HistoricalAwards=false
• 关键词: Investigation; Liquefaction; Potential; Saturated; Sands

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.

本研究探讨了土壤液化的现象， 轻微的地面震动 工程研究的结果 关于土壤液化，到目前为止，只提供了有限的了解， 地震烈度与土体的关系 液化 一般假设是液化发生在 高地震烈度（例如， 改良Mercelli强度量表）。 对这一现象的调查 很可能为理解液化提供新的见解 过程 进行了室内循环三轴试验 非常松散至中等密实饱和砂土的压缩试验， 将确定将触发液化的条件。 一 并对实验数据进行了相关分析 在中等水平的地面震动液化的结果。 的 结果将确定初始应力条件和 叠加的动态应力对潜在的渐进破坏 的斜坡。