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基于冻土区土壤带相变的传热过程建立了埋地管道周围土壤温度场的二维计算模型,采用数值方法对其进行了求解,并模拟了在不同油温、不同保温层厚度与不同土壤含水量等因素影响下管道运营期内管道周围土壤的温度变化。研究结果表明,采用等效热容法能较好地处理冻土相变问题并能有效地应用于埋地管道周围土壤所受热力影响的计算,能够为预测管道运营期内周围土壤的融化范围提供技术支持。
Based on the heat transfer process of soil zone transformation in permafrost zone, a two-dimensional calculation model of soil temperature field around buried pipeline was established. The numerical method was used to solve the problem. The effects of different oil temperatures, Soil moisture and other factors under the influence of pipelines during the pipeline around the soil temperature changes. The results show that the equivalent heat capacity method can effectively deal with the phase transition of frozen soil and can be effectively applied to the calculation of the thermal effects on the soil around the buried pipelines. It can be used to predict the melting range of soil around the pipeline during operation provide technical support.