基于主输气管道的保温对多冻土温度模式的影响

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019) Pub Date : 2019-08-01 DOI:10.2991/ISEES-19.2019.148

А.V. Stepanov, V. Efimov, I. Rozhin, F. Popenko, А.А. Stepanov

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引用次数: 0

摘要

本文研究了用输气管道进行土体换热的过程，并建立了数学模型。它涉及地表热交换条件的季节性变化以及输送气体温度的周期性变化。基于斯蒂凡问题的一般公式，建立了土体中二维温度场动力学的数学表达式。土体与输气管道和外界空气的热交换过程用热微分方程来描述，该方程描述了水饱和土壤中热量的分布，并考虑了“水-冰”相变。根据计算实验结果，确定了输气管道选定段的融晕、冻结晕和土基温度。这些值是确定土基变形所必需的，它表征了其空间稳定性和对降水或上升现象的强度。提出了管道的工程防护措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of Thermal Insulation on Temperature Mode of Multiple-Frozen Grounds Based on Main Gas Pipeline

The paper examines the process of heat exchange of soil mass with a gas pipeline and mathematical modeling. It involves seasonal changes in heat exchange conditions on the surface as well as cyclical changes in the temperature of the transported gas. The mathematical formulation for dynamics of two-dimensional temperature field in soil mass is made based on general formulation of Stefan problems. The process of heat exchange of soils mass with a gas pipeline and outside ambient air is described by the differential heat equation that describes the distribution of heat in water-saturated soil and takes into account “water-ice” phase transition. Based on the results of the computational experiment, melting and freezing halos and soil base temperature in the selected section of the gas pipeline were determined. These values are necessary to determine deformations of soil base, which characterize its spatial stability and strength to precipitate or ascent phenomena. The paper provides measures for engineering protection of the pipeline.

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来源期刊

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" dedicated to the 85th anniversary of H.I. Ibragimov (ISEES 2019)

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