Research Initiation: Transversely Isotropic Behavior and Constitutive Modeling of the Surface Clay Crust

研究启动：表面粘土地壳的横向各向同性行为和本构模型

• 批准号: 8808948
• 负责人: Dana Humphrey
• 金额: $ 6.95万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8808948&HistoricalAwards=false
• 关键词: Research; Initiation; Transversely; Isotropic; Behavior

In the Northern part of the United States, a variety of structures (small buildings, highway embankments, tanks) are supported at shallow depths on soil deposits composed of a crust (1 to 5 meters thick) overlying a deep layer of soft clay. It is often uneconomical to provide support for the structures using deep foundations which penetrate through the soft clay to harder layers underneath. For shallow support, the ability to perform analyses that include the effects of the stiff crust are important. Unfortunately, the physical properties of the crust are difficult to measure and analyses for a layered system (soil layers of varying properties) is difficult. This proposal provides for a careful set of physical measurements of the stress-strain properties of hand carved samples of a desiccated crust in Maine, and for analytical work needed to allow these properties to be modeled properly in theoretical analyses. The results of the study should make foundation design more economical and minimise the probabilities of failures.

在美国的北方， （小型建筑物、高速公路护栏、坦克） 由地壳组成的土壤沉积物的浅层（1至5米 厚的）覆盖着一层很深的软粘土。 这往往是不经济的 为使用深基础的结构提供支撑， 渗透到软粘土层下面的硬土层。 为 浅支持，执行分析的能力，包括 硬地壳的影响是重要的。 可惜 地壳的物理性质很难测量， 分层系统（不同性质的土层）的分析是 难 该提案提供了一套仔细的物理测量， 干燥的手工雕刻样品的应力-应变特性 地壳在缅因州，并为分析工作需要，让这些 在理论分析中正确建模的属性。 的 研究结果应使基础设计更经济 最大限度地减少失败的可能性。