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机械通风及地温对寒区隧道防冻长度的影响

陶亮亮 曾艳华 周小涵 田啸宇

陶亮亮, 曾艳华, 周小涵, 田啸宇. 机械通风及地温对寒区隧道防冻长度的影响[J]. 西南交通大学学报, 2024, 59(1): 29-38. doi: 10.3969/j.issn.0258-2724.20211002
引用本文: 陶亮亮, 曾艳华, 周小涵, 田啸宇. 机械通风及地温对寒区隧道防冻长度的影响[J]. 西南交通大学学报, 2024, 59(1): 29-38. doi: 10.3969/j.issn.0258-2724.20211002
TAO Liangliang, ZENG Yanhua, ZHOU Xiaohan, TIAN Xiaoyu. Effect of Mechanical Ventilation and Ground Temperature on Anti-Freezing Length of Tunnels in Cold Regions[J]. Journal of Southwest Jiaotong University, 2024, 59(1): 29-38. doi: 10.3969/j.issn.0258-2724.20211002
Citation: TAO Liangliang, ZENG Yanhua, ZHOU Xiaohan, TIAN Xiaoyu. Effect of Mechanical Ventilation and Ground Temperature on Anti-Freezing Length of Tunnels in Cold Regions[J]. Journal of Southwest Jiaotong University, 2024, 59(1): 29-38. doi: 10.3969/j.issn.0258-2724.20211002

机械通风及地温对寒区隧道防冻长度的影响

doi: 10.3969/j.issn.0258-2724.20211002
基金项目: 国家自然科学基金(52104076);四川省交通运输科技项目(2021-B-01,2021-B-03)
详细信息
    作者简介:

    陶亮亮(1995—),男,博士研究生,研究方向为隧道通风与防灾,E-mail:taolliang@126.com

    通讯作者:

    周小涵(1988—),男,副研究员,研究方向为隧道通风与防灾、隧道与地下结构稳定性,E-mail:zhouxh2008@126.com

  • 中图分类号: U451.2

Effect of Mechanical Ventilation and Ground Temperature on Anti-Freezing Length of Tunnels in Cold Regions

  • 摘要:

    为揭示通风参数及地温对寒区隧道冻害的影响,基于传热学理论推导了隧道围岩-衬砌-风流三维非稳态数值传热控制方程,分析了不同节点的数值传热差分方程,建立了高地温寒区隧道三维温度场数值计算模型;基于数值分析研究了机械通风速度、机械通风时间和地温对高地温寒区隧道防冻长度的影响. 结果表明:1) 不考虑机械通风,孜拉山隧道的防冻长度超过1200 m;地温每升高5 ℃隧道防冻长度将减小约100 m. 2) 考虑机械通风影响,当地温为10~30 ℃时,每天以2.5 m/s的速度通风2.0 h可减少防冻长度215 m;不同地温下机械通风速度每增大0.5 m/s,防冻长度减小约20 m,地温对防冻长度衰减速率影响很小;当机械通风时间小于2.0 h时,不同地温条件下增大机械通风速度对防冻长度的影响不大.

     

  • 图 1  围岩径向节点划分示意

    Figure 1.  Schematic diagram of surrounding rock radial node division

    图 2  模型试验平台及测点布置(单位:cm)

    Figure 2.  Model test platform and measuring point layout (unit: cm)

    图 3  试验结果与数值结果对比(截面D

    Figure 3.  Comparison between test results and numerical results (section D)

    图 4  孜拉山隧道纵横断面

    Figure 4.  Vertical section and cross section of Zilashan Tunnel

    图 5  孜拉山隧道原始地温分布

    Figure 5.  Original geotemperature distribution of Zilashan Tunnel

    图 6  不同机械通风速度下围岩纵向温度分布

    Figure 6.  Longitudinal temperature distribution of surrounding rock under different mechanical speeds and ground temperature

    图 7  不同机械通风速度下围岩温度及不同地温下防冻长度

    Figure 7.  Surrounding rock temperature and anti-freezing length under different mechanical ventilation speeds and geotemperature

    图 8  不同通风时间下通风速度对围岩温度及防冻长度影响

    Figure 8.  Influence of ventilation speed on surrounding rock temperature and anti-freezing length under different ventilation time

    表  1  昌都地区气温参数(近20年)

    Table  1.   Temperature parameters in Changdu area (nearly 20 years)

    月份1月2月3月4月5月6月7月8月9月10月11月12月
    均温−1.61.04.78.112.215.316.315.513.18.42.4−1.5
    最低均温−9.6−6.8−2.41.45.39.212.610.07.31.8−5.0−9.3
    下载: 导出CSV

    表  2  数值计算工况

    Table  2.   Numerical calculation conditions

    工况机械通风风
    速/(m·s−1
    每天机械通
    风时间/h
    地温/℃
    1~501.0,1.5,2.0,
    2.5,3.0
    孜拉山实
    际地温
    6~102.5
    11~153.0
    16~203.5
    21~254.0
    26~3002.010,15,20,
    25,30
    31~352.5
    36~403.0
    41~453.5
    46~504.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-12-14
  • 修回日期:  2022-04-19
  • 网络出版日期:  2023-05-11
  • 刊出日期:  2022-12-01

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