Large deformation behavior of soil in landslides and soil-structure interaction

滑坡土体大变形行为及土-结构相互作用

• 批准号: RGPIN-2022-03307
• 负责人: Hawlader, Bipul
• 金额: $ 2.62万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=752788
• 关键词: Large; deformation; behavior; soil; landslides

Large soil deformation occurs in many geotechnical problems. For example, in large-scale landslides in sensitive clay in eastern Canada and Scandinavia or submarine landslides, the failure of soil blocks might continue over several hundred meters behind the crest of the slope. Similarly, the debris might travel hundreds of meters and kilometers in some cases in offshore environments. These landslides could affect the population and damage infrastructures (e.g. pipelines and piles) located both in upslope and downslope directions. Empirical and statistical approaches are typically used to predict the extent of landslides and runout. The proposed research program will develop advanced numerical techniques for modelling large deformation in landslides and debris flow in Eulerian-based finite element and computational fluid dynamics frameworks. Pipeline-soil interactions will be investigated, incorporating large soil deformation during operation, and including cases when the landslide and runout impact a pipeline. The effects of pile installation and load-carrying capacity will be investigated for varying conditions, including piles in sensitive clay and in sloping ground. Five Master's and five Doctoral candidates' research will be supported by this grant at Memorial University of Newfoundland and Labrador, who will receive training in advanced laboratory testing, numerical analysis and physical modelling of challenging geotechnical problems in onshore and offshore environments. The outcomes will be useful for landslide hazard assessment and the development of improved design guidelines for pipelines and piles.

大型土壤变形发生在许多岩土技术问题中。例如，在加拿大东部和斯堪的纳维亚州或海底滑坡的敏感粘土中的大规模滑坡中，土壤块的故障可能会持续到坡山顶的落后数百米以上。同样，在某些情况下，在海上环境中，碎屑可能会传播数百米和公里。这些滑坡可能会影响位于下坡和下坡方向的人口和损害基础设施（例如管道和桩）。经验和统计方法通常用于预测滑坡和跳动的程度。拟议的研究计划将开发高级数值技术，以建模基于欧拉的有限元和计算流体动力学框架中的滑坡和碎屑流中的大变形。将研究管道 - 土壤相互作用，在操作过程中结合了较大的土壤变形，包括压倒性和跳动会影响管道的情况。在不同的条件下，将研究桩安装和携带负荷能力的影响，包括敏感粘土和倾斜地面的堆。纽芬兰纪念大学和拉布拉多大学将获得五项硕士和五项博士学位研究的支持，他们将接受高级实验室测试，数值分析和物理模型的培训，这些培训是对陆上和岸环境中挑战性岩土技术问题的培训。结果将对滑坡危害评估以及改进的管道和桩的设计指南的制定有用。