Deep mixing to stabilize champlain sea clay

深度混合以稳定尚普兰海粘土

• 批准号: 506042-2016
• 负责人: Liu, Jinyuan
• 金额: $ 2.91万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 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=618057
• 关键词: Deep; mixing; stabilize; champlain; sea

This proposed research is to extend a successful NSERC Engage research project into a thorough investigation of applying the deep mixing method (DMM) for ground improvement of sensitive Champlain Sea clay. Infrastructure development around the Ottawa region and the Upper St. Lawrence River region is important for Canada's economy; however, the local marine clay known as Champlain Sea clay makes construction activity difficult due to its sensitive nature. Champlain Sea clay has also been responsible for many landslides in the area. Therefore, a novel ground improvement method is urgently required for safe and cost-efficient infrastructure development. DMM is a ground improvement technique where a binder such as cement or lime is mixed in-situ into the soil to improve its properties and make construction workable. Since its inception in the 1970s, DMM has become very popular in many parts of world, including Western Canada. However, DMM has yet to be applied in Eastern Canada due to a lack of test data. During a previous NSERC Engage project, the efficiency of stabilizing Champlain Sea clay with cement was confirmed with a significant strength increase and compressibility reduction. The objectives of this research are to 1) obtain the right binder and optimum dosage and thoroughly investigate the geotechnical properties of stabilized Champlain Sea clay; 2) test the long-term performance of DMM stabilized Champlain Sea clay; and 3) develop a rigorous design method. The introduction of DMM could have significant economic and social benefits for infrastructure development in Eastern Canada.

这项拟议的研究是扩展一个成功的NSERC Engage研究项目，深入调查应用深层搅拌法（DMM）对敏感的尚普兰海粘土进行地基加固。渥太华地区和圣劳伦斯河上游地区的基础设施发展对加拿大的经济非常重要;然而，当地的海洋粘土（称为尚普兰海粘土）由于其敏感性而使建筑活动变得困难。尚普兰海粘土也是该地区许多山体滑坡的原因。因此，迫切需要一种新的地基加固方法，以实现安全和具有成本效益的基础设施开发。DMM是一种地面改良技术，其中将水泥或石灰等粘合剂就地混合到土壤中，以改善其性能并使施工可行。自20世纪70年代成立以来，DMM在世界许多地方都非常受欢迎，包括加拿大西部。然而，由于缺乏测试数据，DMM尚未在加拿大东部应用。在以前的NSERC Engage项目中，证实了用水泥稳定Champlain Sea粘土的效率，其强度显著增加，压缩性降低。本研究的目的是：1）获得正确的粘结剂和最佳剂量，并彻底调查稳定Champlain Sea粘土的岩土性能; 2）测试DMM稳定Champlain Sea粘土的长期性能; 3）开发严格的设计方法。DMM的引入可以为加拿大东部的基础设施发展带来重大的经济和社会效益。