寒区隧道洞口空气幕温度场理论分析
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1.河北农业大学城乡建设学院;2.石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室;3.铜陵学院建筑工程学院

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U457

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国家自然科学基金资助项目(51778380)。


Theoretical analysis of temperature field of air curtain at tunnel portal in cold region
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School of Urban and Rural Construction, Hebei Agricultural University

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    摘要:

    寒区隧道洞口空气幕保温技术相比传统的被动保温技术,可以更好地适应自然环境。本文通过流体力学原理、叠加原理和贝塞尔特征函数,得出了空气幕作用下寒区隧道空气温度场和围岩径向温度理论解,构建了完整的寒区隧道洞口空气幕温度场的理论体系。通过数值模拟方法,验证了该保温技术的可行性,总结了该保温技术的保温原则。结果表明:理论计算结果和数值计算结果较为接近,空气幕保温技术可有效防止隧道冻害;空气幕保温技术的保温原则可总结为加热为主,隔风为辅。本项研究可为今后的工程实践提供理论基础。

    Abstract:

    The air curtain insulation technology at the tunnel entrance in cold regions can be better adapted to the natural environment compared to traditional passive insulation technology. This article uses the principles of fluid mechanics, superposition, and Bessel characteristic functions to obtain theoretical solutions for the air temperature field inside tunnels in cold regions and the radial temperature of surrounding rocks under the action of air curtains. A complete theoretical system for the temperature field of the air curtain at the tunnel entrance in cold regions has been constructed. The feasibility of this insulation technology was verified through numerical simulation methods, and the insulation principles of this insulation technology were summarized. The results show that the theoretical calculation results are relatively close to the numerical calculation results, and tunnel freezing damage can be effectively prevented by air curtain insulation technology; The insulation principle of air curtain insulation technology can be summarized as heating is primary and air isolation is secondary. This study can provide a theoretical basis for future engineering practice.

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王仁远,朱永全,方智淳,等. 寒区隧道洞口空气幕温度场理论分析[J]. 科学技术与工程, , ():

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  • 收稿日期:2023-08-02
  • 最后修改日期:2024-01-30
  • 录用日期:2024-02-01
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