Diffusion of dissolved aqueous-phase gas in porous media is increasingly relevant to existing and emerging geotechnical engineering applications. There is currently no established method to determine the effective aqueous-phase gas diffusion coefficient and associated tortuosity factor through soil. In this study a pressure-decay-method was applied to determine tortuosity factors for aqueous-phase gas diffusion in silt, sand, and gravel using experimental equipment readily available in many geotechnical engineering laboratories. Inverse numerical analyses were applied to assess the effective tortuosity factor from pressure-decay data, which provided a consistent and efficient assessment of tortuosity associated with aqueous-phase gas diffusion for each soil type.

中文翻译：

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实验室测定土壤中水相气体扩散系数和曲折度

溶解的水相气体在多孔介质中的扩散与现有和新兴的岩土工程应用越来越相关。目前尚无确定有效的水相气体扩散系数和通过土壤的相关曲折系数的确定方法。在这项研究中，采用压力衰减方法，使用许多岩土工程实验室容易获得的实验设备，确定水相气体在粉砂，沙子和砾石中扩散的曲折因子。应用逆数值分析从压力衰减数据评估有效曲折因子，从而为每种土壤类型提供了与水相气体扩散相关的曲折性的一致且有效的评估。