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考虑应力历史的冻土一维蠕变模型

刘萌心, 姚晓亮, 齐吉琳, 马玲

刘萌心, 姚晓亮, 齐吉琳, 马玲. 考虑应力历史的冻土一维蠕变模型[J]. 岩土工程学报, 2016, 38(5): 898-903. DOI: 10.11779/CJGE201605015
引用本文: 刘萌心, 姚晓亮, 齐吉琳, 马玲. 考虑应力历史的冻土一维蠕变模型[J]. 岩土工程学报, 2016, 38(5): 898-903. DOI: 10.11779/CJGE201605015
shu
LIU Meng-xin, YAO Xiao-liang, QI Ji-lin, MA Ling. 1D creep model for frozen soil taking account of stress history[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 898-903. DOI: 10.11779/CJGE201605015
Citation: LIU Meng-xin, YAO Xiao-liang, QI Ji-lin, MA Ling. 1D creep model for frozen soil taking account of stress history[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(5): 898-903. DOI: 10.11779/CJGE201605015
shu

考虑应力历史的冻土一维蠕变模型  English Version

  • 1. 中国科学院寒区旱区环境与工程研究所（冻土工程国家重点实验室）,甘肃 兰州 730000;
    2. 中国科学院大学,北京 100049;
    3. 北京建筑大学,北京 100049;
    4. 北方民族大学,宁夏 银川 750021

基金项目: 国家基础科学人才培养基金项目（J1210003/J0109）; 北京市属高等学校高层次人才引进与培养计划项目（CIT&TCD20150101）; 国家自然科学基金项目（41572268）
详细信息
    作者简介:

    刘萌心(1989- ),男,山东菏泽人,硕士研究生,主要从事冻土力学与寒区工程等方面的研究。E-mail: liumxvip@163.com。

    通讯作者:

    姚晓亮

  • 中图分类号: TU47

1D creep model for frozen soil taking account of stress history

  • 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Beijing University of Civil Engineering and Architecture, Beijing100049, China;
    4 Beifang University of Nationalities, Yinchuan 750021, China

摘要

    摘要
  • 摘要: 受力历史是影响冻土力学行为的关键因素。引入融土中考虑应力历史的一维蠕变模型并进行了相应修正,使其能够反应温度对冻土蠕变特性的影响,通过不同温度条件下的K0加载试验获取相关模型参数,经过回归分析得到了各参数与温度的函数关系。通过对比试验和模型计算结果表明,修正后得到的冻土一维蠕变模型在预测不同温度条件下土体的蠕变发展规律时具有较好的预测精度。同时,随着施加压力的增大,该模型能够准确描述当外压力超过其历史上所受最大压力时所产生的应变急剧增长现象。因此,该模型可以作为寒区工程稳定性分析和设计的可靠依据。
    Abstract: The stress history is a key factor influencing the mechanical behavior of frozen soil. A one-dimensional creep model for unfrozen soil considering the effect of stress history is modified to describe the creep behavior of frozen soil. Model parameters are obtained from K0 tests under different temperatures. Through the regression analysis, the relationships between model parameters and temperatures are established. The comparison between the calculated and tested results indicates that the modified creep model has a good agreement with the experimental results under different temperatures. At the same time, with the increase of overloading, this model can describe the sharp change of strain when the overloading is larger than the historical largest applied stress reasonably. So, the modified model can be a useful tool for the stability analysis and design of prosects in cold regions.
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    • 参考文献(18)
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出版历程
  • 收稿日期:  2015-06-10
  • 发布日期:  2016-05-24

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