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导热系数对寒区隧道温度场时空分布的影响

孙克国 李思 许炜萍 肖支飞 李昊波 徐雨平

孙克国, 李思, 许炜萍, 肖支飞, 李昊波, 徐雨平. 导热系数对寒区隧道温度场时空分布的影响[J]. 西南交通大学学报, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530
引用本文: 孙克国, 李思, 许炜萍, 肖支飞, 李昊波, 徐雨平. 导热系数对寒区隧道温度场时空分布的影响[J]. 西南交通大学学报, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530
SUN Keguo, LI Si, XU Weiping, XIAO Zhifei, LI Haobo, XU Yuping. Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel[J]. Journal of Southwest Jiaotong University, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530
Citation: SUN Keguo, LI Si, XU Weiping, XIAO Zhifei, LI Haobo, XU Yuping. Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel[J]. Journal of Southwest Jiaotong University, 2020, 55(2): 256-264, 289. doi: 10.3969/j.issn.0258-2724.20180530

导热系数对寒区隧道温度场时空分布的影响

doi: 10.3969/j.issn.0258-2724.20180530
基金项目: 国家自然科学基金(51678495,51578463)
详细信息
    作者简介:

    孙克国(1981—),男,副教授,研究方向为地下工程施工力学与灾害防治,E-mail:sunkeg@126.com

  • 中图分类号: U459.2

Influence of Thermal Conductivity on Temporal and Spatial Distributions of Temperature Filed in Cold Region Tunnel

  • 摘要: 寒区隧道温度场对其抗防冻设计至关重要,围岩和支护结构的导热系数对温度场时空分布具有显著影响. 以寒区公路运营隧道为计算模型,采用理论推导、现场实测、数值仿真等方法对寒区隧道温度场的时空分布受导热系数的影响规律进行了研究. 研究结果表明:在任意时间点,变温圈内各点的温度均随支护结构导热系数的增大而降低,且支护导热系数越大,同位置处的温度降低速率越小;在任意时间点,支护温度随围岩导热系数的增大而升高,围岩温度随其导热系数的变化呈现分区性;可将围岩变温圈分为Ⅰ区和Ⅱ区:Ⅰ区内的各点温度随围岩导热系数的增大而升高;Ⅱ区内的各点温度随围岩导热系数的增大而降低;时间越长,Ⅰ区和Ⅱ区分界线的斜率和截距越大. 研究成果可为寒区隧道的抗防冻设计及选线提供借鉴和参考.

     

  • 图 1  寒区隧道瞬态热量传递计算简化示意

    Figure 1.  Simplified sketch for calculation of transient heat transfer in tunnels in cold regions

    图 2  隧道横断面(单位:cm)

    Figure 2.  Cross section map of the tunnel (unit:cm)

    图 3  寒区隧道温度场数值模型(单位:m)

    Figure 3.  Numerical model of the tunnel (unit:m)

    图 4  测温孔传感器安装

    Figure 4.  Temperature sensor installation

    图 5  现场监测点布置(单位:cm)

    Figure 5.  Layout map of field monitoring points (unit:cm)

    图 6  隧道环境温度

    Figure 6.  Environmental temperature of the tunnel

    图 7  计算温度与实测温度对比

    Figure 7.  Temperature comparison between calculation and monitoring

    图 8  隧道拱顶考察点布置图(单位:cm)

    Figure 8.  Layout map of investigation points in tunnel crown (unit:cm)

    图 9  第30 天的温度场分布

    Figure 9.  Temperature field on 30th

    图 10  受影响深度随时间变化曲线

    Figure 10.  Affected depth changes with time

    图 11  冻结深度随时间变化曲线

    Figure 11.  Frozen depth changes with time

    图 12  温度随支护结构导热系数变化曲线

    Figure 12.  Temperature change with thermal conductivity of structure

    图 13  温度随围岩导热系数变化曲线

    Figure 13.  Temperature change with thermal conductivity of surrounding rock

    图 14  围岩导热系数的影响分区

    Figure 14.  Influenced zone by thermal conductivity of surrounding rock

    图 15  结构导热系数不同时温度随时间变化曲线

    Figure 15.  Temperature change with time for different thermal conductivity of structure

    图 16  围岩导热系数不同时温度随时间变化曲线

    Figure 16.  Temperature change with time for different thermal conductivity of surrounding rock

    图 17  分区时间随深度变化曲线

    Figure 17.  Intersection time change with depth

    表  1  校验模型的计算参数

    Table  1.   Parameters of verification model

    位置密度
    /(kg•m−3
    比热容
    /(J•(kg•℃)−1
    导热系数
    /(W•(m•℃)−1
    结构2 400 9601.6
    围岩2 0251 2562.0
    下载: 导出CSV

    表  2  导热系数取值

    Table  2.   Value of thermal conductivity W•(m•℃)−1

    工况支护围岩
    10.4、0.6、0.8、1.0、1.2、1.4、1.6、1.8、2.0、2.2、2.4、2.62.0
    21.60.5、1.0、1.5、2.0、2.5、3.0、3.5、4.0、4.5、5.0、5.5、6.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-11-30
  • 修回日期:  2018-12-18
  • 网络出版日期:  2018-12-28
  • 刊出日期:  2020-04-01

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