路基土有机质含量测量不确定度评定

Evaluation of Uncertainty in Measuring Organic Matter Content in Roadbed Soil

路基土中的有机质含量是评估铁路路基发生松动或路堤出现不均匀沉降等现象的重要属性。精准的检测路基土有机质含量并对检测结果评定有着重大意义。本文按照JJF 1059.1—2012要求对重铬酸钾容量法检测路基土有机质含量开展不确定度的评定工作,研究发现测量重复性是其测量不确定度的主要组成部分。通过分析评定重铬酸钾容量法测定过程,为降低检测结果的不确定度提供科学参考。

The organic matter content in roadbed soil is an important attribute for evaluating phenomena such as loosening of railway embankments or uneven settlement of embankments.Accurately detecting the organic matter content of roadbed soil and evaluating the test results is of great significance.This article evaluates the uncertainty of using potassium dichromate volumetric method to detect the organic matter content of roadbed soil in accordance with the requirements of JJF 1059.1-2012.The study found that measurement repeatability is the main component of its measurement uncertainty.By analyzing and evaluating the process of potassium dichromate volumetric method,a scientific reference is provided to reduce the uncertainty of detection results.