冻土热物理性质的统计特征及分布规律

Statistical characters and distribution laws of thermophysical properties of frozen soil

为揭示冻土热物理性质的随机性及内在规律,以青藏高原粉质黏土为研究对象,分别对5种典型温度条件下冻土的热物理参数进行50组大样本测试。研究结果表明:即使在同一温度下,试样的热物理参数也存在明显的随机性,但又呈现出一定的统计规律;冻土的热物理参数(导热系数和容积热容量)服从正态分布或对数正态分布,并利用总体分布假设的χ2检验法验证了分布规律的正确性。

To reveal the randomness and intrinsic regularity of the frozen soil,thermal physical parameters of50sets of silty clay in Qinghai-Tibet Plateau were tested in each temperature state.The result shows that even though under the same temperature,the thermal parameters of samples exhibit great randomness and uncertainty,but obey statistical rules to some extent.According to the analysis with probability and mathematical statistics method,the thermal physical parameters(thermal conductivity and volumetric heat capacity)of the frozen soil obey normal distribution or lognormal distribution,and this hypothesis is proven to be valid by theχ^2hypothesis testing method.