Coupling Novel Soil Moisture-Suction Sensors and UAV Photogrammetry Technology to the Performance of Highway Embankments
| 项目名称： | Coupling Novel Soil Moisture-Suction Sensors and UAV Photogrammetry Technology to the Performance of Highway Embankments |
| 摘要： | The majority of highway embankments across the United States, specifically in the South-Central region, are in marginal condition because the high-plasticity clays used during construction soften with time to significantly lower strengths. Also, infiltrating rainfall increases pore-water pressures and ultimately lead to slope instability. As a result, these failures have required periodic maintenance to ensure proper highway safety, which has been costly for the Louisiana and Texas DOTs. This study will advance the understanding of how long-term wetting-drying cycles change the in-situ unsaturated and strength properties of high-plasticity clays. The project scope focuses on developing a predictive design and rehabilitation tool for highway embankments while addressing fundamental unsaturated and shear strength research questions. One highway embankment with prior history of shallow slides will be instrumented to collect undisturbed shear strength, in-situ soil moisture, and pore-water conditions. Specific objectives of the project include: (1) measure in-situ suction and moisture content using a novel suction-TOR sensor, (2) rapidly evaluate embankment geometry and slope movements using unmanned aerial vehicles (UAVs), and (3) develop a numerical tool that can predict fully softened shear strengths, slope failures for a rainfall event, and improvements in embankment to a repair. |
| 状态： | Active |
| 资金： | 90000 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 项目负责人： | Melson, Christopher |
| 执行机构： | Louisiana State University<==>University of Texas at Arlington |
| 开始时间： | 20190815 |
| 预计完成日期： | 20210815 |
| 主题领域： | Data and Information Technology；Geotechnology；Highways；Maintenance and Preservation |
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