Influence of localized thin areas on the bearing capacity of ice roads in Canada's North

加拿大北部局部薄层对冰路承载力的影响

• 批准号: 511853-2017
• 负责人: Beddoe, Ryley
• 金额: $ 1.78万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639841
• 关键词: Influence; localized; thin; areas; bearing

Ice roads, ice runways, and ice platforms provide vital access to remote areas of Canada for the resupply ofisolated communities as well as the exploration and development of natural resources for economic growth inCanada. Accurately determining the safe bearing capacity for these ice covers is critical, and is closelydependent on the ice thickness as a design parameter. Technological advances such as Ground PenetratingRadar (GPR) now allow us to take thousands of ice thickness measurements in a fraction of the time thatprevious methods of drilling through the ice and manually measuring took. Despite GPR now providing acomprehensive understanding of the ice cover thickness profile, standard of practice dictates that the absoluteminimum ice thickness measured must be the value used in design. Using the minimum ice thicknessmeasured for calculating the safe bearing capacity of an ice cover does not consider the respective location,size, or frequency of the thin ice areas. This results in an overly conservative ice cover design, which hasdetrimental effects on communities and industries in the North. NOR-EX Ice Engineering Inc. requires anunderstanding of how variations in ice thickness impact the overall performance/bearing capacity of an iceroad. The results of this research project will allow NOR-EX Ice Engineering Inc. to develop a methodologyfor using an effective ice thickness from GPR data rather than an overly conservative minimum ice thickness.

冰路、冰跑道和冰平台为加拿大偏远地区提供了至关重要的通道，为孤立社区提供补给，并为加拿大的经济增长勘探和开发自然资源。准确地确定这些冰盖的安全承载力是至关重要的，并且与作为设计参数的冰厚密切相关。技术的进步，如探地雷达（GPR），现在允许我们采取数以千计的冰厚度测量的时间的一小部分，以前的方法钻透冰和手动测量了。尽管探地雷达现在提供了对冰盖厚度剖面的全面了解，但实践标准规定，测量的绝对最小冰厚度必须是设计中使用的值。使用测量的最小冰厚来计算冰盖的安全承载力，并没有考虑到薄冰区的各自位置、大小或频率。这导致了过于保守的冰盖设计，对北方的社区和工业产生了不利影响。NOR-EX冰工程公司需要了解冰厚的变化如何影响冰盖的整体性能/承载能力。该研究项目的结果将使NOR-EX Ice Engineering Inc.开发一种方法学，使用GPR数据的有效冰厚度，而不是过于保守的最小冰厚度。