Development of a Geosynthetic Mechanical Stabilization Technique for Road Subgrade in Warming Cold Regions

暖寒地区路基土工合成材料机械稳定技术开发

• 批准号: 543459-2019
• 负责人: Fall, Mamadou
• 金额: $ 1.82万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=680475
• 关键词: Development; Geosynthetic; Mechanical; Stabilization; Technique

Roads are of vital economic, social, and political importance in all Canadian regions. Subgrade is thefoundation of the road, thus it is the lowest and most important component of a road structure. Thegeotechnical stability or safety of road structures significantly relies on the strength, bearing capacity and settlement of the subgrade soils. However, extensive evidence exists of increase in soil freezing and thawing cycles in Canadian no-permafrost regions (underlie about half of Canada's landmass) over the past decades because of the climatic warming. This climate induced change in freezing and thawing cycles has been negatively affecting the performance of many subgrades of roads constructed in Canadian no-permafrost regions, increasing their maintenance costs, decreasing their useful life span, and jeopardizing the population safety and economic activities in those regions. Therefore, significant research and development efforts continue to be devoted to finding techniques for mitigating subgrade degradation induced by freezing/thawing cycles, and to properly and cost-effectively design roads in the warming Canadian cold regions. In the proposedcollaborative project between the University of Ottawa and the company, Titan Environmental Containment Ltd., a novel technique consisting of subgrade stabilization by using a new generation custom made Geogrid Composites (GC) will be developed and studied in this project. The development of the proposed new technique will open up the lucrative and immense market of building and maintaining road systems in the Canadian no-permafrost regions in light of global warming as well as in other regions. This will result in business opportunities for TITAN at both the national and international levels. Moreover, it is expected that the results of this project will have economic and social impacts on the Canadian no-permafrost regions. Furthermore, this project is fertile ground for the training of civil road engineering and climate change adaptation.

道路在加拿大所有地区都具有至关重要的经济、社会和政治重要性。路基是道路的基础，是道路结构中最低也是最重要的组成部分。道路结构的岩土稳定性或安全性很大程度上取决于路基土的强度、承载力和沉降。然而，大量证据表明，过去几十年来，由于气候变暖，加拿大非永久冻土地区（约占加拿大陆地面积的一半）土壤冻结和融化周期增加。这种气候引起的冰冻和解冻周期变化对加拿大非永久冻土地区修建的许多道路路基的性能产生了负面影响，增加了其维护成本，缩短了其使用寿命，并危及这些地区的人口安全和经济活动。因此，大量的研究和开发工作继续致力于寻找减轻冻融循环引起的路基退化的技术，并在加拿大变暖的寒冷地区正确且经济有效地设计道路。在渥太华大学和泰坦环境遏制有限公司拟议的合作项目中，将开发和研究一种新技术，该技术包括使用新一代定制土工格栅复合材料（GC）来稳定路基。鉴于全球变暖，拟议新技术的开发将为加拿大无永久冻土地区以及其他地区的道路系统建设和维护开辟利润丰厚且巨大的市场。这将为 TITAN 在国内和国际层面带来商机。此外，预计该项目的结果将对加拿大无永久冻土地区产生经济和社会影响。此外，该项目为土木道路工程和气候变化适应培训提供了沃土。