Reliable Prediction of Shear Strength of Swelling Clays
| 项目名称： | Reliable Prediction of Shear Strength of Swelling Clays |
| 摘要： | Accurate prediction of the shear strength of swelling clays is extremely important for the design of roads, railway infrastructure, foundations, embankments, slopes, canals, erosion control, retaining walls, etc. The damage caused by swelling clays to the U.S. infrastructure is estimated to be of the order of about $13 billion per year (2009). Swelling clays are found in various parts of the United States and the world. In the red and blue colored regions contain soils with high swelling potential and orange, and green colored regions contain soils with moderate to low swelling potential. Portions of North and South Dakota contain soils that have high swelling potential. Overestimation of strength parameters can lead to failures and underestimation can lead to significant increase in the cost of the project. Shear strength of soils with high swelling clay content, can vary from high values when swelling is restrained to significant degradation in strength or even complete loss of strength due to swelling. The change in shear strength can also be seasonal. Fundamental strength parameters that define strength properties of soils are related to a variety of factors that include soil type, microstructural characteristics, fluid properties, mineralogy, saturation, etc. Reliable predictive tools that can accurately predict the shear strength of swelling clays are lacking. Our prior work on clays demonstrates the key role of molecular interactions on the evolution of microstructure and the macroscopic properties such as permeability, consolidation, and swelling pressure. |
| 状态： | Completed |
| 资金： | 200000 |
| 资助组织： | Research and Innovative Technology Administration |
| 管理组织： | Mountain-Plains Consortium |
| 项目负责人： | Tolliver, Denver |
| 执行机构： | Civil and Environmental Engineering Department |
| 主要研究人员： | Katti, Kalpana S. |
| 开始时间： | 20160219 |
| 预计完成日期： | 20190930 |
| 实际结束时间： | 20200520 |
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