Mechanics of Sampling Disturbance in Clay Soils

粘土中采样扰动的力学

• 批准号: 8507077
• 负责人: Muniram Budhu
• 金额: $ 6.35万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-02-01 至 1988-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8507077&HistoricalAwards=false
• 关键词: Mechanics; Sampling; Disturbance; Clay; Soils

This research develops a novel approach to measure and verify the extent of disturbances induced while preparing soil samples for geomechanic tests. The soil will be modeled as a dilatant strain-hardening frictional material to account for soil-wall interface effects during sampling. An elaborately designed laboratory arrangement will be used to monitor induced disturbances and determine the extent of stress and pore water pressure changes while taking samples from a soil block. The results from the model study will be correlated with experimental data. The importance of measuring induced disturbances in soil samples has been well recognized by the geomechanic community. A quantitative method to assess the extent of these disturbances has, thus far, not been developed. The research approach is innovative and has a potential to make a significant impact in geomechanic experimentation.

这项研究开发了一种新的方法来测量和验证 在准备土壤样品时引起的干扰程度， 地质力学试验 土壤将被模拟为一种 考虑土-墙界面应变硬化摩擦材料 采样期间的影响。 精心设计的实验室 安排将用于监测感应干扰，并确定 应力和孔隙水压力的变化程度， 一个土块的样本 模型研究的结果将是 与实验数据相关。 测量感应的重要性 土壤样品中的扰动已经得到了很好的认可， 地质力学共同体 一种定量方法来评估 迄今为止，这些扰动尚未发展。 研究 方法具有创新性，有可能产生重大影响 地质力学实验