The soil temperature distribution characteristics were experimentally studied, during heat storage and release processes in the fine-grained sand with different moisture content. Results showed that, the soil temperature distributions in the process of soil heat storage and release are almost symmetric under the same excess temperature. The excess temperature is the main factor affecting the soil temperature change, and the influence of the moisture content variation is almost negligible. At each set of excess temperature, the soil temperature change in heat storage and release processes have a good logarithmic relationship with the heat transfer time, radial distance and longitudinal distance. The soil temperature change shows a linear increase trend with the excess temperature, and the soil temperature disturbance in radial direction is far greater than that in longitudinal direction. Based on the hypothetical multivariate nonlinear power function regression model, the experience formula for predicting the soil temperature was proposed. The prediction deviation was within 10 %.

在不同水分含量的细粒砂中，在储热和释放过程中，对土壤温度分布特征进行了实验研究。结果表明，在相同的过高温度下，土壤热量存储和释放过程中的温度分布几乎是对称的。温度过高是影响土壤温度变化的主要因素，水分含量变化的影响几乎可以忽略不计。在每组过高温度下，土壤在储热和释放过程中的温度变化与传热时间，径向距离和纵向距离具有良好的对数关系。土壤温度变化随温度升高呈线性增加趋势，径向土壤温度扰动远大于纵向土壤扰动。基于假设的多元非线性幂函数回归模型，提出了预测土壤温度的经验公式。预测偏差在10％以内。