寒区隧道温度场理论解及防寒保温设防长度

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摘要 研究目的: 当列车运行速度和频率增大时,隧道进出口防寒保温设防长度与规范建议长度存在一定差异。基于此,本文基于非稳态热传导理论、叠加原理和Bessel方程推导考虑列车风影响的寒区隧道温度场理论解,分析列车运行速度和运行间隔对隧道洞内温度场分布的影响规律,并给出考虑列车风影响的寒区隧道设防长度建议。
研究结论: (1)本文推荐的考虑列车风影响的寒区隧道温度场理论解与现场实测误差不足10%,可运用于寒区隧道防寒保温设计;(2)列车运行速度和行车间隔未改变隧道洞内温度场分布规律,但洞内纵向温度曲线整体发生平移,增大了洞口范围内负温长度;(3)列车速度分别为100 km/h、150 km/h、200 km/h、250 km/h、300 km/h、350 km/h和400 km/h时,隧道洞口防寒保温设防长度需提升45.76%、65.55%、84.65%、110.31%、127.02%、155.21%和222.70%;(4)列车行车间隔为30 min、15 min、10 min和5 min时,隧道洞口防寒保温设防长度需提升4.28%、12.21%、28.34%和48.65%;(5)本研究成果可为寒区隧道防寒保温设计提供参考和借鉴。

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	袁金秀
	王道远
	王悦
	朱永全
	栾永军
	崔光耀
	崔海龙

关键词 ：寒区隧道, 列车风, 温度场, 理论解, 防寒保温, 设防长度

Abstract：Research purposes: When the train running speed and frequency increase, there is a certain difference between the length of cold proof and thermal insulation at the tunnel portal and the length recommended in the specification. Firstly, based on the unsteady heat conduction theory, superposition principle and Bessel equation, the theoretical solution of tunnel temperature field in cold area considering the influence of train wind is derived; Secondly, the influence of train speed and running interval on the temperature field distribution in the tunnel is analyzed; Finally, the suggestion of tunnel fortification length in cold area considering the influence of train wind is given.
Research conclusions: (1)The error between the theoretical solution of temperature field of tunnel in cold area considering the influence of train wind recommended in this paper and the field measurement is less than 10%, which can be applied to the design of cold proof and thermal insulation of tunnel in cold area. (2)The temperature field distribution in the tunnel is not affected by the train speed and running interval, but the longitudinal temperature curve in the tunnel shifts as a whole, increasing the length of negative temperature of the tunnel. (3)When the train speed is 100 km/h, 150 km/h, 200 km/h, 250 km/h, 300 km/h, 350 km/h and 400 km/h respectively, the cold proof and thermal insulation fortification length of tunnel portal needs to be increased by 45.76%, 65.55%, 84.65%, 110.31%, 127.02%, 155.21% and 222.70%. (4)When the train running interval is 30 min, 15 min, 10 min and 5 min, the cold proof and thermal insulation fortification length of tunnel portal shall be increased by 4.28%, 12.21%, 28.34% and 48.65%. (5)The research results can provide reference for cold proof and thermal insulation design of tunnels in cold regions.

Key words： tunnels in cold regions train wind temperature field theoretical solution cold proof and thermal insulation fortification length

收稿日期: 2021-11-02

PACS:

U45

基金资助:河北省高等学校科学技术研究重点项目——基于时空效应的季节性寒区隧道冻胀作用机制及冻害防治技术研究

作者简介: **袁金秀,1980年出生,女,副教授。

引用本文:

袁金秀, 王道远, 王悦, 朱永全, 栾永军, 崔光耀, 崔海龙. 寒区隧道温度场理论解及防寒保温设防长度[J]. 铁道工程学报, 2022, 39(5): 59-64.
YUAN Jinxiu, WANG Daoyuan, WANG Yue, ZHU Yongquan, LUAN Yongjun, CUI Guangyao, CUI Hailong. Theoretical Solution of Tunnel Temperature Field in Cold Region and Fortification Length of Cold Proof and Thermal Insulation. Journal of Railway Engineering Society, 2022, 39(5): 59-64.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I5/59

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