Mechanical Behaviour of Artificially Frozen Ground: Experimental Observations and Modelling

人工冻土的力学行为：实验观测和建模

• 批准号: 2886419
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2886419
• 关键词: Mechanical; Behaviour; Artificially; Frozen; Ground

The applications of artificial ground freezing in construction cover the formation of frozen earth walls to support deepexcavations, structural underpinning for foundation improvement, and temporary control of ground water. The growingawareness of the merits of artificial ground freezing as a temporary ground improvement system with minimalenvironmental impact is directly related to progress in the understanding of the mechanical behaviour of frozen soils.However, a solid framework has yet to be established for the fully coupled thermo-hydromechanical behaviour offrozen/unfrozen soil and there is need for fundamental research to be carried out on experimental characterisation andconstitutive modelling. The proposed project will develop, set-up and use innovative laboratory equipment to investigateexperimentally the behaviour of soil on freezing and thawing. The project will provide valuable insight into the mechanicalbehaviour of frozen soils, drawing upon multi-disciplinary knowledge at the interface between soil mechanics,thermodynamics, soil physics, material science, and industry. The results will then be carried forward to calibrateconstitutive models and validate existing hypothesis on artificially frozen ground behaviour.

人工地面冻结在建筑中的应用包括形成冻土墙以支持深基坑、改善地基的结构托换以及临时控制地下水。人们越来越认识到人工地面冻结作为一种对环境影响最小的临时地面改良系统的优点，这与对冻土力学行为的理解的进展直接相关。然而，尚未建立完全耦合热耦合的坚实框架。冻结/未冻结土壤的流体力学行为，需要在实验表征和本构模型方面进行基础研究。拟议的项目将开发、建立和使用创新的实验室设备来通过实验研究土壤在冻结和解冻时的行为。该项目将利用土壤力学、热力学、土壤物理学、材料科学和工业之间的多学科知识，为冻土的力学行为提供有价值的见解。然后，结果将用于校准本构模型并验证有关人工冻土行为的现有假设。