寒区隧道阳光棚温升效果与影响

孙克国; 魏勇; 贾敬龙; 孟庆余; 张弛; 秦晋行; 李世斌

doi:10.3969/j.issn.0258-2724.20220398

寒区隧道阳光棚温升效果与影响

doi: 10.3969/j.issn.0258-2724.20220398

1.
西南交通大学土木工程学院，四川成都 610031
2.
中国铁路设计集团有限公司，天津 300308

基金项目: 国家自然科学基金（52178396）

详细信息

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

中图分类号: U45
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- 文章访问数: 318
- HTML全文浏览量: 97
- PDF下载量: 45
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-07
- 修回日期: 2022-08-27
- 网络出版日期: 2023-04-10
- 刊出日期: 2022-09-22

Temperature Rise Effects and Impact of Solar Shed in Cold Region Tunnels

1.
College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
China Railway Design Corporation, Tianjin 300308, China

摘要

摘要:
为避免寒区隧道冻害问题产生，引入新型阳光棚防寒措施. 首先，建立三维瞬态传热数值模型，获得自然通风条件下的隧道温度场，并通过现场温度监测验证数值计算模型的可靠性；然后，通过数值方法验证阳光棚的温升效果，并进一步探究阳光棚入口风速、长度、跨度及环境温度对温升效果的影响；最后，对各因素进行敏感性分析，研究其对温升效果的影响程度. 研究结果表明：入口风速低于1.0 m/s时，阳光棚发挥良好的温升效果. 风速与温升效果呈负相关；长度每延长50 m，隧道进口气温升高0.71 ℃；跨度对温升效果的影响不明显；温升效果随环境温度变低而愈显著. 上述因素对温升效果的敏感性排序为：入口风速（0.39） > 长度（0.30） > 环境温度（0.19） > 跨度（0.12），其中，入口风速为最敏感因素，应用时应着重考虑. 因此，对阳光棚的使用建议为：低风速、大长度、小跨度.
- 寒区隧道 /
- 冻害问题 /
- 阳光棚 /
- 温升效果 /
- 敏感性分析
Abstract:
To avoid frost damage problems in cold regions tunnels, a solar shed was introduced as one of the insulation measures. First, a three-dimensional transient heat transfer numerical model was established to obtain the tunnel temperature field under natural ventilation, and the reliability of the numerical calculation model was verified through on-site temperature monitoring. Then, the temperature rise effects of the solar shed were demonstrated through numerical methods, and the effects of the solar shed’s speed, length, span, and ambient temperature on the temperature rise effects were further investigated. Finally, a sensitivity analysis was conducted on these factors to study their impact on temperature rise. The study results show that the solar shed has a good temperature rise effect when the wind speed is lower than 1.0 m/s. The wind speed was negatively related to the temperature rise effects. The air temperature at the tunnel entrance increases by 0.71 ℃ for every 50 m increase in length. The influence of the span on temperature rise effects is not obvious. The temperature rise effects become more and more significant as the ambient temperature becomes lower. The sensitivity of the above factors to temperature rise effects is ranked as follows: wind speed (0.39) > length (0.30) > ambient temperature (0.19) > span (0.12), of which the wind speed is the most sensitive factor and should be considered in the application. Therefore, the recommendation for the use of a solar shed is in environments with low wind speed, long tunnel lengths and small tunnel spans.
- tunnels in cold regions /
- freezing damage /
- solar shed /
- temperature-rising effects /
- sensitivity analysis

HTML全文

图 1 隧道横断面（单位：cm）

Figure 1. Cross-section of tunnel (unit: cm)

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图 2 地温测点布置（单位：cm）

Figure 2. Layout of ground temperature measuring points (unit: cm)

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图 3 数值计算模型（单位：m）

Figure 3. Numerical calculation model (unit: m)

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图 4 日平均气温正弦曲线拟合

Figure 4. Curve fitting of daily average temperature

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图 5 温度场分布

Figure 5. Temperature field distribution

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图 6 现场实测与数值模拟对比

Figure 6. Comparison between field measurement and numerical simulation

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图 7 阳光棚计算模型（单位：m）

Figure 7. Calculation model for solar shed (unit: m)

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图 8 气温和太阳辐照度逐时变化

Figure 8. Temporal variation of temperature and solar irradiance

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图 9 阳光棚表面温度分布

Figure 9. Temperature distribution on shed surface

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图 10 洞内气温逐时变化

Figure 10. Hourly variation of temperature in tunnel

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图 11 有、无阳光棚情况对比

Figure 11. Temperature comparison with and without solar shed

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图 12 阳光棚作用下拱顶温度变化

Figure 12. Temperature variation of vault wall with solar shed

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图 13 能量转移示意

Figure 13. Diagram of energy transfer

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图 14 进口气温随风速变化

Figure 14. Variation of air temperature with wind speed

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图 15 进口气温与风速的关系

Figure 15. Relationship between air temperature and wind speed

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图 16 进口气温随阳光棚长度变化

Figure 16. Variation of air temperature with shed length

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图 17 进口气温与阳光棚长度的关系

Figure 17. Relationship between air temperature and shed length

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图 18 进口气温随阳光棚跨度变化

Figure 18. Variation of air temperature with shed span

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图 19 环境温度计算工况

Figure 19. Calculation cases of ambient temperature

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图 20 温升效应随环境温度变化情况

Figure 20. Variation of temperature-rising with ambient temperature

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图 21 各参数敏感度曲线

Figure 21. Sensitivity curves under different parameters

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表 1 模型参数

Table 1. Parameters of the calculation model

名称密度/
（kg·m⁻³）比热容/
（J·kg⁻¹·K⁻¹）导热系数/
（W·m⁻¹·K⁻¹）

衬砌 2400 960 1.6
围岩 2025 1256 2.0

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表 2 归一化后敏感度

Table 2. Sensitivity after normalization

因素入口风速阳光棚长度跨度环境温度

敏感度 0.39 0.30 0.12 0.19

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