线性降温对土中分凝冰形成影响的试验研究

发布时间：2018-04-29 23:00

本文选题：冻土 + 冻胀量　；参考：《工业建筑》2017年11期

【摘要】：对分凝冰现象的研究是理解冻土中各类复杂现象的关键。为研究上覆荷载作用下,线性降温模式的分凝冰形成规律,利用高低温交变箱,进行开放系统下土体的一维连续冻结试验。选取3个冷端初始温度,3个上覆荷载进行正交试验,比较分析每个试验条件下试样内部温度场的变化规律、冻结锋面随时间的推进规律、冻胀量变化规律以及水分的迁移情况。试验结果表明:上覆荷载越小,冷端初始温度越低,土样内部温度越低,含水率越高,冻胀量越大。
[Abstract]:The study of ice separation is the key to understand the complex phenomena in frozen soil. In order to study the law of ice formation in linear cooling model under overburden load, the one-dimensional continuous freezing test of soil under open system was carried out by using a high and low temperature alternating box. Three cold end initial temperatures and three overlying loads were selected to carry out orthogonal experiments. The variation of temperature field in each test condition was compared and analyzed. The advancing law of freezing front with time, the changing law of frost heaving and the migration of water were compared and analyzed. The experimental results show that the lower the overburden, the lower the initial temperature at the cold end, the lower the temperature inside the soil sample, the higher the moisture content and the greater the frost heave.
【作者单位】：江苏大学土木工程与力学学院;
【基金】：国家自然科学基金项目(11272137)
【分类号】：TU445

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