Developments of predictive models for mass transport and mechanical properties considering subsurface temperature

在这项研究中，我们针对土壤质量运移和力学性质的温度依赖性，使用高岭土和冲积粘土进行了固结仪测试和温度控制下的溶质运移实验。利用高岭土进行的固结仪试验表明，温度升高使固结屈服应力、固结指数和剪切模数增大，这可能是由于土粒之间胶结作用的增强。温度对溶质运移特性的依赖关系证实了较高温度下样品具有较高的渗透系数和溶质扩散系数。这一趋势可以通过修改这些参数的现有预测模型来表达。此外，利用冲积粘土进行的溶质运移实验表明，温度对溶质弥散系数的影响不如滞后因子那么显著。

In this study, we aimed at understandings of temperature dependencies on mass transport and mechanical properties of soils, and conducted oedometer tests and solute transport experiments under temperature control using Kaolin and alluvial clays. The oedometer tests using Kaolin clays showed temperature increase enhanced consolidation yield stress, consolidation index, and shear modulus possibly due to an increased cementation between soil particles. Temperature dependency on solute transport characteristic confirmed higher hydraulic conductivity and solute diffusion coefficient for samples at higher temperature. This trend could be expressed by modifying existing predictive models for those parameters. In addition, solute transport experiments using alluvial clays showed that temperature dependency on solute dispersion coefficient was not so significant as compared to retardation factor.