铁路路基压实质量检测指标CMV与E_(vd)的相关性校检

Correlation verification of railway subgrade compaction quality test value between CMV and E_(vd)

针对2种路基填料,应用一元线性回归方法研究动态连续同步压实指标CMV与传统路基压实检测指标Evd的相关性,采用点对平均值及平均值对平均值2种拟合方式,与现有连续压实检测规范中相关性校检采取的点对点拟合方式进行对比,发现点对平均值和平均值对平均值拟合方式的相关系数较高;2检测指标间具有良好的线性正相关关系。研究结果表明:动态连续同步压实指标能够真实反映路基压实情况,在我国路基压实质量控制中具有适用性,现有规范中的拟合方式相关性较低,宜加以改进。

Aimed at two subgrade fillings, the unary liner regression method was employed to analyze the correlation of dynamic continuous compaction index CMV and traditional subgrade compaction index Evd. The new fitting models called ＂point -to -mean and mean -to -mean models＂ were discussed compared with the traditional one of ＂point -to -point＂ approach. It can be found that the new fitting models have significantly higher correlations which indicate that both compaction quality test methods have obviously positive correlation linearity. The results demonstrate that the dynamic continuous compaction index can reflect the true subgrade compaction, which shows its applicability in controlling the compaction quality of embankment in our country ： while the fitting mode in current norm has lower correlation and needs to be improved.