基于加权法的砾类土含水率检测

Water content detection of gravel soil based on weighting method

砾类土在工程建设中有着广泛的应用,其含水率是一项非常重要的指标,但现有测试方法耗时较长。以砂砾石料的砾类土为试验对象,基于加权法思想,将饱和面干含水率替代法和虚拟比重法进行结合,开展砾类土含水率快速检测方法的研究,并对现有的饱和面干含水率测定操作进行一定的改进和优化。采用多种数学方法(绝对误差、均方偏差平方和,相关曲线的相关系数和F显著性检验分析法)对加权法和烘干法的结果进行对比分析。通过试验统计数据分析,证实加权法与烘干法的测定结果基本一致。该分析结果为现场土料含水率快速测定提供了一种新的思路和手段。

Gravel soil is widely used in engineering construction,and its water content is a very important index,however the existing test method is time consuming.Therefore,we proposed a rapid detection method on gravel soil moisture content based on the weighting method,in which the water content replacing method of saturated surface drying and virtual specific gravity method was combined.Meanwhile,the existing measurement operation of saturated surface dry moisture was improved and optimized.The results of weighted method and drying method were compared and analyzed by various mathematical methods,including absolute error,square sum of mean square deviation,correlation coefficient and F significance test analysis method.The analysis of test data proved that the results by weighted method and drying method were the same.This method can provide a new way for rapid determination of soil water content in the field.