Site-Response, Soil Liquefaction, and Soil-Pile Interaction Using a Geotechnical Centrifuge

使用岩土离心机进行场地响应、土壤液化和土-桩相互作用

• 批准号: 8603525
• 负责人: Ronald Scott
• 金额: $ 8.68万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-10-15 至 1989-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8603525&HistoricalAwards=false
• 关键词: Site; Response; Soil; Liquefaction; Pile

The aim of this research project is to investigate (1) the effect of ground motion on ground response, including earthquake motions sufficiently severe to induce liquefaction and (2) the associated soil- pile interaction effects in liquefied soil deposits. Loose and dense sand and salt samples will be subjected to horizontal shaking similar to recorded earthquake accelerograms. Instrumented model piles and pile groups will be installed in the saturated soil for the study of dynamic soil-pile interaction. The models will be tested in the geotechnical centrifuge at the California Institute of Technology, and the model tests will simulate a prototype soil deposit with a depth of approximately 100 feet and subjected to ground accelerations in the range .05 to 0.5g. The objective of these tests is to determine: (1) the effects of strain levels on ground motions, (2) the ability of existing theories to predict the observed linear and nonlinear soil behavior, and (3) the conditions that lead to liquefaction and large permanent ground displacements. The realization of these objectives will contribute significantly to current procedures for assessing ground failure due to liquefaction as well as to the methods used to design piles in offshore areas located in seismic environments. Professor Scott is internationally recognized in this area of research and has the institutional facilities available to conduct the research. It is recommended that this request for support be approved.

该研究项目的目的是研究（1）地面运动对地面反应的影响，包括足够严重以诱导液化的地震运动，以及（2）（2）液化土壤沉积物中相关的土壤相互作用效应。 松散而密集的沙子和盐样品将受到与记录的地震加速图相似的水平摇动。 仪器模型桩和桩组将安装在饱和的土壤中，以研究动态土壤 - 孔相互作用。 这些模型将在加利福尼亚理工学院的岩土工程离心机中进行测试，该模型测试将模拟一个原型土壤沉积物，深度约为100英尺，并在0.05至0.5G范围内进行地面加速度。 这些测试的目的是确定：（1）应变水平对地面运动的影响；（2）现有理论预测观察到的线性和非线性土壤行为的能力，以及（3）导致液化和液化的条件大型永久地面位移。 这些目标的实现将对当前评估由于液化引起的地面故障以及在地震环境中近海地区设计桩的方法产生重大贡献。 斯科特教授在这一研究领域得到了国际认可，并拥有可以进行研究的机构设施。 建议批准此支持请求。