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Coupled Heat Transfer and Groundwater Flow Models for Ground Freezing Design and Analysis in Construction

机译：地面冻结设计与分析中的传热与地下水耦合模型

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Artificial ground freezing has been used for over 100 years to provide temporary earth support and groundwater control for deep excavation in both unconsolidated soils and rock. Time dependent thermal numeric models have been used to evaluate the required freezing time for ground freezing systems and to evaluate the required refrigeration loads. Groundwater velocity through the freezing system is a mechanism that introduces additional heat energy into the system that can retard or even prevent the formation of a frozen earth barrier. Recent software developments have introduced models that couple the traditional heat transfer model with groundwater flow models. These models allow the design engineer to evaluate the effects of the groundwater velocity on the freezing system. It permits the design engineer to modify the ground freezing system or to reduce the permeability of the soils with ground improvement techniques thereby reducing the groundwater velocity permitting timely ground freezing operations. This paper discusses the application of these models and compares them to actual field results on key ground freezing projects. The results of these comparisons indicate the commercially available models are reliable thereby establishing a standard method of design for ground freezing projects.
机译：人工地面冻结已经使用了100多年，为未固结的土壤和岩石中的深基坑提供临时的土壤支撑和地下水控制。时间相关的热数值模型已用于评估地面冻结系统所需的冻结时间并评估所需的制冷负荷。通过冻结系统的地下水速度是一种将额外的热能引入系统的机制，可以阻止甚至阻止冻结的地球屏障的形成。最近的软件开发已经引入了将传统传热模型与地下水流模型耦合在一起的模型。这些模型使设计工程师可以评估地下水流速对冻结系统的影响。它允许设计工程师使用地面改良技术来修改地面冻结系统或降低土壤的渗透性，从而降低地下水流速，从而允许及时进行地面冻结操作。本文讨论了这些模型的应用，并将它们与关键地面冻结项目的实际现场结果进行了比较。这些比较的结果表明，市售模型是可靠的，从而建立了地面冻结项目的标准设计方法。

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