Synchronized digital imaging with temperature and pressure measurements in a new soil freezing cell

在新型土壤冷冻室中进行同步数字成像与温度和压力测量

• 批准号: 359361-2008
• 负责人: Sego, David
• 金额: $ 1.85万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=363580
• 关键词: Synchronized; digital; imaging; temperature; pressure

Northern development especially related to the proposed Mackenzie Valley Natural Gas Pipeline and understanding the potential impact of Climate Change in the Arctic requires improved knowledge of the existence and movement of unfrozen water in freezing soils and permafrost subjected to load.The research to be carried out will introduce new investigative methods and tools, notably miniaturized equipment that permits synchronization of the digital imaging and measurements at the micro-scale, to the investigation of unfrozen water migration in freezing soils.The application is to construct a new soil freezing cell that allows for the real time synchronization of digital images taken during a freezing experiment with the measured pore pressures within both a freezing and frozen soil. Internal temperatures will also be recorded to relate the pressure and temperature to the internal unfrozen water content at different locations in the freezing soil.Such innovation is in keeping with the UofA Geotechnical Centre's long tradition of excellence in frozen and freezing soils research and one that has contributed toward the Centre's recognised reputation in permafrost engineering.

北方发展，特别是与拟议的麦肯齐山谷天然气管道有关的发展，以及了解气候变化对北极的潜在影响，需要更好地了解冻土和永久冻土中未冻水的存在和运动。即将开展的研究将引入新的调查方法和工具，特别是允许在微尺度上同步数字成像和测量的小型化设备，应用于冻土中未冻水迁移的研究，构建了一个新的土壤冻结单元，该单元允许在一个冻结过程中拍摄的数字图像的真实的时间同步。用冻结和冻土中测得的孔隙压力进行冻结实验。内部温度也将被记录，以将压力和温度与冻结土壤中不同位置的内部未冻水含量相关联。这种创新符合UofA岩土技术中心在冻结和冻结土壤研究方面的悠久传统，也有助于该中心在永久冻土工程方面的声誉。