Effect of climate-driven loading events on slope stability

气候驱动的荷载事件对边坡稳定性的影响

• 批准号: RGPIN-2015-05890
• 负责人: Beddoe, Ryley
• 金额: $ 1.75万
• 依托单位: Royal Military College of Canada
• 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=764691
• 关键词: Effect; climate; driven; loading; events

Over the last century, landslides in Canada are estimated to have cost over $9.5 billion CAD in both direct and in-direct costs, and have resulted in over 600 fatalities. As Canada continues to experience increased precipitation and temperatures, the socio-economic cost will continue to rise as slopes and embankments which were previously stable face increasing risk of failure.  Efforts to understand and mitigate the impact of climate change on slope stability is critical. Specifically, Canadian engineering `best practices' for slope stability need to be addressed for a changing climate in order reduce the risks associated with climate-driven landslides. The overall goal of this research program is to understand how climate change will trigger landslides in otherwise stable slopes, and to use that knowledge to improve landslide risk assessment techniques.In this research program, two themes will investigate this challenging problem of how climate change impacts slope stability. The first theme will focus on understanding how climate change triggers landslides, concentrating on degrading permafrost and the role of soil thickness. To accomplish this, twenty geotechnical centrifuge landslide experiments will be conducted, as well as field investigations in the Northwest Territories. The scientific findings, acquired through these physical model experiments and site-investigations will have a transformative effect on the development of climate-driven landslide mitigation and slope stabilization techniques in urban and cold regions in Canada, and will provide the critical physical data needed to verify developed numerical prediction and propagation models.The second research theme will focus on risk assessment techniques, first with the development of a sensor that measures large suction stresses in the field. This will enable long-term slope stability monitoring for high-risk slopes exposed to climate changes, and provide practitioners with a cost-effective monitoring device that increases the warning time prior to a landslide. In addition, improvement to landslide susceptibility and hazard mapping techniques will be developed, targeted at expanding mapping techniques to include the impact and associated risks of climate change in urban and northern regions.Six graduate and five undergraduate students will be trained in this research program and will gain expertise in technical, scientific, research and soft skills. The developed knowledge gained by students can be applied in a wide variety of applications, including geotechnical infrastructure design, geohazard investigations, and landslide risk assessment. In the long term, the research will benefit Canada by reducing the socio-economic costs and risks associated with landslides, and will improve the safety and stability of our natural and engineered slopes that are impacted by climate change.

在上个世纪，据估计，加拿大的山体滑坡的直接成本和直接成本都超过95亿加元，并导致600多人死亡。随着加拿大继续经历降水量和温度的增加，随着插槽和路堤以前稳定的面部增加失败风险，社会经济成本将继续上升。理解和减轻气候变化对坡度稳定性的影响的努力至关重要。具体而言，需要解决气候变化的加拿大工程“最佳实践”，以降低与气候驱动的滑坡相关的风险。该研究计划的总体目标是了解气候变化将如何触发其他稳定的插槽中的滑坡，并使用该知识来改善滑坡风险评估技术。在该研究计划中，两个主题将调查气候变化如何影响坡度稳定性的挑战问题。第一个主题将集中于了解气候变化如何触发滑坡，集中于降解多年冻土和土壤厚度的作用。为此，将进行二十个岩土离心机滑坡实验，以及西北地区的现场调查。通过这些物理模型实验和现场评估获得的科学发现将对加拿大城市和寒冷地区的气候驱动的缓解和坡度稳定技术的发展产生变革性的影响，并将为验证开发的数值预测模型提供较大的风险评估，以衡量风险的衡量技术，以至于衡量了第二个研究主题。 场地。这将使长期的坡度稳定性监视暴露于气候变化的高风险插槽，并为从业人员提供具有成本效益的监控设备，从而增加了滑坡前的警告时间。此外，将开发出对滑坡易感性和危险映射技术的改进，针对扩展地图技术，包括城市和北部地区气候变化的影响和相关风险。六个研究生和五名本科生将接受此研究的培训，并将在技术，科学，研究，研究和软技能方面获得专业知识。学生获得的开发知识可以应用于各种应用中，包括岩土基础设施设计，地球扎华投资和滑坡风险评估。从长远来看，这项研究将通过减少与滑坡相关的社会经济成本和风险来使加拿大受益，并将提高受气候变化影响的自然和工程插槽的安全性和稳定性。