| 一种易于产生冻胀的冻结模式 |
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| 引用本文： | 商翔宇,周国庆,梁恒昌.一种易于产生冻胀的冻结模式[J].岩土力学,2007,28(Z1):107-110. |
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| 作者姓名： | 商翔宇 周国庆 梁恒昌 |
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| 作者单位： | 中国矿业大学 建筑工程学院 岩石力学与土力学研究所，徐州 221008 |
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| 基金项目： | 国家“973”项目（No.2002CB412704）；国家自然科学基金重点项目（No.50534040）；国家自然科学基金项目（No.40471021）；高等学校博士学科点专项科研基金（No.20040290502）；中国矿业大学青年科研基金项目（No.2005A005） |
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| 摘 要： | 选取青藏铁路沿线粉质黏土，进行了一维土样在连续、分步两种不同冻结模式下的冻胀响应试验和数值模拟研究，得到并分析其温度梯度场及土样冻胀量的演变规律。结果表明，与连续冻结模式相比，分步冻结模式更易产生较大冻胀量，其机制主要在于该冻结模式使得冻结缘内温度梯度较大。
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| 关 键 词： | 冻结模式 冻胀 温度梯度场 |
| 收稿时间： | 2007-05-30 |
Research on a kind of freezing mode inclining to frost heave in frozen soil |
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| SHANG Xiang-yu,ZHOU Guo-qing,LIANG Heng-chang.Research on a kind of freezing mode inclining to frost heave in frozen soil[J].Rock and Soil Mechanics,2007,28(Z1):107-110. |
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| Authors: | SHANG Xiang-yu ZHOU Guo-qing LIANG Heng-chang |
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| Institution: | Institute of Rock and Soil Mechanics, School of Architecture and Civil Engineering, China University of Mining and Technology, Xuzhou 221008, China |
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| Abstract: | Freezing tests in two different kinds of modes in the case of open system on 1D soil sample made of Tibetan silty clay are carried out, and the evolvement characteristics of the sample’s frost heave、temperature gradient field are obtained. Then according to the self-made programme based on the heat and moisture coupled frost heave model, aforementioned tests are simulated, and the result of simulation is quite consistent with the test result. Our research shows that frozen soil can make more frost heave easily under stepwise freezing modes. Our analysis makes it clear that the temperature gradient in frozen fringe with stepwise freezing mode is greater than that with continuous freezing mode. |
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| Keywords: | freezing mode frost heave temperature gradient field |
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