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首页> 外文期刊>Cold regions science and technology >Ground temperature and deformation characteristics of anti-freeze-thaw embankments in permafrost and seasonal frozen ground regions of China
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Ground temperature and deformation characteristics of anti-freeze-thaw embankments in permafrost and seasonal frozen ground regions of China

机译：永久冻土和季节性冻结地区抗冻冻土堤坝的地温及变形特征

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摘要

Embankment engineering in cold regions are at risk of seasonal freeze-thaw damage which seriously threatens the safe operation of vehicles. To ensure the long-term stability of embankment engineering in these areas, novel anti-freeze-thaw measures with differential filling materials should be taken. This study first analyzes the thermal-deformation characteristics and effects of two typical railway embankments with differential anti-freeze-thaw filling materials in permafrost and seasonal frozen ground regions based on ground temperature and deformation monitoring data. Then, on the basis of these results and previous research, the similarities and differences between the thermal-deformation characteristics of different embankments in permafrost and seasonal frozen ground regions are studied. Finally, the study summarizes fundamental principles for anti-freeze-thaw embankment measures in accordance with frozen ground type. Results demonstrate that: 1) the thaw settlement of permafrost embankments demonstrates persistence and is non-uniform, while the frost heave of embankments in seasonal frozen ground regions demonstrates cold shrinkage and heave delay; 2) understanding the development of the temperature and thickness of the seasonal thawing/freezing layer in time and space is key for preventing freeze-thaw damage in frozen ground regions; 3) the long-term stability of embankments in permafrost regions can be maintained by controlling the quantity of cold entrance and diffusion. For embankments in seasonal frozen ground regions, frost heave may be controlled by changing the property, water content, and temperature of filling materials. These findings will be helpful for better understanding the thermal-mechanical characteristics of embankments in different frozen ground regions, and for providing important technical guidance to ensure the operational efficiency of engineering projects.
机译：寒冷地区的堤防工程面临着严重威胁车辆安全运行的季节性冻融损坏的风险。为确保这些领域的堤防工程长期稳定性，应采取新的抗冻融措施。本研究首先通过基于地温和变形监测数据分析了多年冻土和季节性冷冻地区的差动抗冻融灌装材料的热变形特性和效果。然后，在这些结果和先前的研究的基础上，研究了多年冻土和季节性冷冻地区不同堤防的热变形特征之间的相似性和差异。最后，该研究总结了根据冷冻地面类型的防冻 - 解冻堤防措施的基本原理。结果表明：1）永久冻土堤的解冻沉降证明持久性，并且是不均匀的，而季节性冷冻地区的堤坝的霜冻率展示了冷缩和升降延迟; 2）了解时间和空间中季节性解冻/冷冻层的温度和厚度的发展是防止冷冻地区冻融损伤的关键; 3）可以通过控制冷入口和扩散量来维持多年冻土区域的长期稳定性。对于季节性冷冻地区的堤防，可以通过改变填充材料的性质，水含量和温度来控制霜冻升降。这些发现将有助于更好地理解不同冻结地区的堤防的热电力特性，并为提供重要的技术指导，以确保工程项目的运营效率。

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  • 来源
    《Cold regions science and technology》 |2021年第9期|103331.1-103331.12|共12页
  • 作者

    Bowen Tai; Qingbai Wu; Zurun Yue; Hongbin Xu;

  • 作者单位

    State Key laboratory of Frozen ground Engineering Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China;

    State Key laboratory of Frozen ground Engineering Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou 730000 China;

    State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao University Shijiazhuang 050043 China;

    Key Laboratory for Health Monitoring and Control of Large Structures in Hebei Province Shijiazhuang Tiedao University Shijiazhuang 050043 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Embankment engineering; Permafrost; Seasonal frozen ground; Thermal-deformation characteristics;

    机译：堤防工程;永久冻土;季节性冻结;热变形特征;

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