Recently, there has been a growing interest in the use of Artificial Ground Freezing (AGF) to temporarily stabilize unstable ground at tunnel construction sites. Recognizing that the effectiveness of this method is significantly influenced by groundwater flow, it is crucial to conduct a sophisticated thermal-hydraulic coupling analysis to assess the potential adverse effects of groundwater flow in the artificial ground freezing process. This study establishes a numerical analysis model to evaluate the efficiency of AGF and proposes a novel design approach for freeze pipe layouts in elliptical tunnel face under conditions of excessive groundwater flow. These design concepts are implemented using a Gravitational Search Algorithm (GSA) and the COMSOL Multiphysics platform integrated with MATLAB. Furthermore, the study employs a constructed simulation model to analyze and assess the sensitivity of thermodynamic parameters concerning the efficiency of AGF under groundwater flow conditions. The findings contribute valuable insights to the field of tunnel construction and ground stabilization.

中文翻译：

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椭圆隧道施工中人工地层冻结的优化研究——地下水流及土体热力学参数的综合分析

最近，人们越来越关注使用人工地面冻结 （AGF） 来暂时稳定隧道施工现场的不稳定地面。认识到这种方法的有效性受到地下水流的显著影响，因此进行复杂的热-水耦合分析以评估地下水流在人工地面冻结过程中的潜在不利影响至关重要。本研究建立了评价 AGF 效率的数值分析模型，并提出了一种在地下水流量过大条件下椭圆形隧道掌子面冻结管布置的新设计方法。这些设计概念是使用引力搜索算法 （GSA） 和与 MATLAB 集成的 COMSOL Multiphysics 平台实现的。此外，该研究采用构建的模拟模型来分析和评估热力学参数对地下水流条件下 AGF 效率的敏感性。这些发现为隧道建设和地基稳定领域提供了宝贵的见解。