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首页> 外文期刊>Canadian Geotechnical Journal >Intermittent freezing mode to reduce frost heave in freezing soils - experiments and mechanism analysis
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Intermittent freezing mode to reduce frost heave in freezing soils - experiments and mechanism analysis

机译：间歇冻结模式减少冻土中的冻胀-实验与机理分析。

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Two types of freezing tests have been conducted on Xuzhou silty clay. The intermittent freezing test results show that the frost heave increases step by step after the initial freezing stage, and its total amount is only 48.8% that resulting from the continuous freezing test. A model describing the growth process of the active ice lens in saturated, rigid soils has been established, and the importance of the frozen fringe is investigated in the model. The growth processes of the final ice lenses in the two freezing tests have been used for laboratory validation of the model, and the calculated results are in general agreement with the experimental data. The mechanism of using an intermittent freezing mode to reduce frost heave has been revealed by analyzing the growth process of the final ice lens. We indicate that, during the noncooling stage, the backward movement of the freezing front, which causes the disappearance of the frozen fringe, stops the growth of the final ice lens. This effect results in a step-type frost heave curve in the intermittent freezing test and reduces the heave amount effectively. Finally, problems concerning the practical application of the intermittent freezing mode are discussed in a preliminary manner.
机译：在徐州粉质黏土上进行了两种类型的冷冻测试。间歇冷冻试验结果表明，在初始冷冻阶段后，冻胀量逐步增加，其总量仅为连续冷冻试验的48.8％。建立了描述活动冰透镜在饱和，坚硬土壤中生长过程的模型，并研究了该模型中冷冻条纹的重要性。两次冰冻测试中最终冰晶的生长过程已用于模型的实验室验证，计算结果与实验数据基本一致。通过分析最终冰晶的生长过程，揭示了使用间歇冻结模式减少霜冻的机理。我们指出，在非冷却阶段，冻结前沿的向后运动会导致冻结条纹的消失，从而阻止最终冰晶的生长。该效果在间歇冻结试验中形成阶梯状的冻胀曲线，并有效地减少了冻胀量。最后，初步探讨了间歇冻结模式的实际应用问题。

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