土样含水率的测量不确定度评定

Evaluation of Measurement Uncertainty for Water Content Tests in Soil Samples

根据《测量不确定度评定与表示》(JJF 1059—1999)的要求,系统地对土样含水率的测量结果不确定度进行了评定。针对土的含水率试验中的测量结果不确定度的特点,选用了物理性质较均匀的粘性土作为试样,分析了试验过程中影响测量准确性的因素。结果表明:试验条件下的土样含水率测量结果的扩展不确定度为1.6%。

According to the requirements of the standard JJF 1059-1999 “Uncertainty Evaluation and Denotation of the Measurement Results”, the uncertainty for the measurement results of the water content in soil Samples was evaluated. Concerning the characteristics of uncertainty of the water content determination in soil sampies, a pail of soil sample was taken as the specimen due to its relative homogeneity. The factors affecting the measurement accuracy were discussed. The result shows that the expanded uncertainty of measurement results of the water content in soil samples was 1.6% under the proposed testing conditions.