地下土壤导热系数简化柱热源模型确定方法

THE SIMPLIFIED CYLINDRICAL SOURCE MODEL FOR DETERMINING THE THERMAL CONDUCTIVITY UNDERGROUND SOIL

在总结土壤热物性参数的各种测试方法和计算模型的基础上,提出简化柱热源模型,对G函数进行简化。计算结果与以往柱热源模型计算结果非常吻合,表明提出的简化柱热源模型及算法是可行和有效的,并且使计算过程简化,便于工程应用。

Based on summarizing the models that are commonly used to determine underground thermal conductivity, a new simplified cylindrical source model was derived with simplified G-function. A numerical program was compiled for the simplified cylindrical source model, incorporating the parameter estimation technique. The validation of this model was verified by comparing the result with that of a common cylindrical source model from the literatures. It is proved that the simplified model is feasible and available （ 〈 5 % ）. It can keep a good precision of calculation.