CAREER: Experimental, Numerical, and Case Studies of Landslide Mobility

职业：滑坡流动性的实验、数值和案例研究

• 批准号: 1453103
• 负责人: Tong Qiu
• 金额: $ 50万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2021-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1453103&HistoricalAwards=false
• 关键词: CAREER; Experimental; Numerical; Case; Studies

This Faculty Early Career Development (CAREER) Program grant will advance the understanding of landslide mobility. Rapid flow-like landslides such as mud flows, debris flows, and rock avalanches are capable of mobilizing large volumes of soil and rock and impacting large areas, often far from their source because of their high mobility. Globally, rapid flow-like landslides cause billions of dollars in damage and thousands of deaths and injuries each year. As evidenced by the recent Oso Landslide (March 22, 2014) in Snohomish County, Washington, landslide mobility remains poorly understood. This award supports fundamental research to provide the knowledge needed for advancing the understanding of landslide mobility, and reliably predicting landslide runout. Results from this research will improve current landslide hazard assessment and ultimately help reduce future losses to society from these devastating geohazards. The international component of this project will foster international collaborations that contribute to the training of globally-engaged engineering students.The objective of this research is to advance the understanding of the effects of solid-like behaviors of landslide mass and fluid-solid interaction on landslide mobility, which play important roles but have been overlooked in the past. To achieve this objective, integrated experimental, numerical and case studies that span laboratory and field scales will be conducted. Laboratory-scale flume tests will be conducted to investigate the impact forces generated by a sliding mass on a rigid obstruction. The slide mass will have varied porosity, mass, and release height and pattern. In the numerical investigation, a three dimensional smoothed particle hydrodynamics model will be developed, which will incorporate the latest advancements in contact algorithms, formulations of landslide mobility, two-phase debris flow models, and parallel computing. The developed numerical model will be calibrated and validated against the laboratory-scale flume tests conducted in this research, well-documented field-scale flume tests conducted by others, and case histories of long-runout landslides. The fully validated numerical model will then be utilized to gain insights into the effects of internal stress field, fluid-solid interaction, and evolution of porosity, stiffness, and bulk density of the sliding mass on landslide mobility.

这个教师早期职业发展（职业）计划赠款将提高对滑坡流动性的理解。快速流动的滑坡，例如泥浆流，碎屑流和岩石雪崩，能够动员大量的土壤和岩石，并影响大面积，这通常是由于它们的较高的流动性而远离其来源。在全球范围内，迅速流动的滑坡每年造成数十亿美元的损失和数千人的死亡和伤害。正如最近在华盛顿Snohomish县的OSO Landsplide（2014年3月22日）所证明的那样，洋地滑坡的流动性仍然鲜为人知。该奖项支持基本研究，以提供促进对滑坡流动性的理解所需的知识，并可靠地预测滑坡的跳动。这项研究的结果将改善当前的滑坡危险评估，并最终有助于减少这些毁灭性地灾害的未来损失。该项目的国际组成部分将促进国际合作，有助于培训全球工程专业的学生。这项研究的目的是促进对陆滑质量和流体 - 固定相互作用对滑坡流动性的固体行为的影响的理解，该行为对降落液的流动性，这些行为起着重要的作用，但在过去却被忽略了。为了实现这一目标，将进行跨实验室和现场尺度的综合实验，数值和案例研究。将进行实验室规模的水槽测试，以调查滑动质量对刚性阻塞产生的影响力。幻灯片质量将具有变化的孔隙率，质量以及释放高度和图案。在数值研究中，将开发一个三维平滑的粒子流体动力学模型，该模型将结合接触算法中的最新进步，滑坡迁移率的配方，两阶段碎屑流量模型和平行计算。将针对这项研究中进行的实验室规模的水槽测试进行校准并验证开发的数值模型，其他人进行了据可记录的现场尺度水槽测试，以及其他长期滑坡的案例历史。然后，全面验证的数值模型将被用来洞悉内部应力场，流体 - 固定相互作用以及孔隙率，刚度和块状质量密度在滑坡迁移率上的影响。