埋地油气输送管道沿线地温的计算

针对如何计算一定深度下土壤温度的问题，基于半无限大空间非稳态导热理论，建立了油气输送管道埋深处的地温计算模型。结合粘土、轻壤土、砂土、砂砾及中、重壤土的土壤孔隙率和密度，研究了土壤在水淹、润湿、干旱、沙漠环境下的导热系数和体积热容计算方法，确定了地温计算模型中的土壤导热系数和体积热容取值。计算值与实测值的对比结果表明，该模型能够基于土壤质地、含水量、年平均气温、最高气温和最低气温准确计算地温值。（表6，图1，参10）

Calculation of soil temperature along buried oil and gas pipeline

Based on the unsteady heat conduction theory in half space, the soil temperature calculation model for deep buried pipeline was established to solve the problem of soil temperature calculation at a certain depth. According to the porosity and density of clay, light loam, sand, gravel, medium loam and heavy loam, the calculation methods of thermal conductivity and volumetric heat capacity of soil under flooding, wet, drought and desert environments were studied. The values of thermal conductivity and volumetric heat capacity of soil in the soil temperature calculation model were determined. The comparison between the calculated results and the measured ones shows that this model can calculate the value of soil temperature accurately based on soil texture, water content, annual average temperature, maximum temperature and minimum temperature. （6 Tables, 1 Figure, 10 References）