利用穷举搜索法结合参数估计方法确定地下岩土热物性参数,通过模拟验证该方法的可靠性,并用于实际工程测量,且与优化方法计算结果进行对比分析。结果表明穷举搜索法可以在搜索区域得到目标函数方差和最小值,基于此得到热物性参数值可靠性较高;而优化方法得到的目标函数方差和为局部区域的极小值,其确定的土壤导热系数可靠性较高,但钻孔内热阻和容积比热计算结果可信度相对较低。 The exhaustive search method and the parameter estimation method are used to determine the thermal parameters of the underground rock. The reliability of the method is validated by simulation and used in actual engineering measurement. The results are compared with those of the optimization method. The results show that the exhaustive search method can get the variance and the minimum of objective function in the search area, and the thermal property parameter value is more reliable based on this. The variance of the objective function obtained by the optimization method is the minimum value of the local area, The reliability of soil thermal conductivity is high, but the reliability of calculating the thermal resistance and volume specific heat in the borehole is relatively low.