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埋地热油管道通过永冻地带时 ,会导致土壤解冻 ,进而导致管道沉陷和土壤物性参数变化。分析管道周围土壤融化圈变化对管道系统的设计、施工和管理是必需的。考虑热油管道对其周围土壤的影响和半无穷大土壤的传热 ,提出了描述永冻地区土壤融化圈变化的数学模型。通过一定的数学处理得到了计算融化圈的特征线方程 ,并采用差分法进行求解特征线方程 ,获得了满意的结果。计算分析表明 ,这一方法是可行的。
Buried hot oil pipeline through the permafrost zone, will lead to soil thawing, leading to pipe subsidence and soil physical parameters change. Analysis of changes in soil thawing zone around the pipe is necessary for the design, construction and management of the pipe system. Considering the influence of hot oil pipeline on the surrounding soil and the heat transfer of semi-infinite soil, a mathematical model describing the change of soil thawing zone in the area of permafrost is proposed. Through some mathematical processing, the characteristic line equation of the melting circle is obtained, and the difference method is used to solve the characteristic line equation, and the satisfactory result is obtained. Calculation and analysis show that this method is feasible.