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首页> 外文期刊>Cold regions science and technology >New ice lens initiation condition for frost heave in fine-grained soils
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New ice lens initiation condition for frost heave in fine-grained soils

机译：细粒土壤中冻胀的新冰晶起始条件

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摘要

Frost heave results from ice segregation and ice lens formation and growth as a soil freezes. This formation is initiated by cracking of the soil in the frozen fringe. Therefore, evaluation of the ice lens initiation requires the determination of the crack initiation condition in the frozen fringe. A new fundamental approach is proposed to determine the ice lens initiation condition using the soil freezing characteristics curve (SFCC). It is demonstrated that an ice lens initiates close to the so-called ice-entry value defined using the SFCC. Ice lens initiation conditions for different boundary conditions were determined in a laboratory using the SFCC and were then compared with the ice lens initiation conditions from a one-dimensional open system frost heave tests. The results using the SFCC showed good agreement with the values determined experimentally. It was therefore concluded that the SFCC derived information can be used as an input parameter in existing frost heave models to establish the segregation temperature.
机译：冻胀起因于土壤冻结时冰的偏析和冰晶的形成和生长。这种形成是通过冷冻条纹中的土壤破裂而引发的。因此，对冰晶起爆的评估需要确定冷冻条纹中的裂纹起爆条件。提出了一种利用土壤冻结特征曲线（SFCC）确定冰晶晶起始条件的基本方法。已经证明，冰晶的起始值接近使用SFCC定义的所谓的冰进入值。在实验室中使用SFCC确定了不同边界条件的冰晶起始条件，然后将其与一维开放式系统冻胀试验中的冰晶起始条件进行了比较。使用SFCC的结果表明与实验确定的值吻合良好。因此可以得出结论，SFCC得出的信息可以用作现有霜冻模型中的输入参数，以建立偏析温度。

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