基于主成分分析法的黏土分散性评价模型构建  

Establishment of clay dispersion degree evaluation model based on principal component analysis

作　　者：巨娟丽[1] 樊恒辉[1] 刘俊民[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《人民长江》2015年第4期59-62,共4页Yangtze River

基　　金：国家自然科学基金资助项目(51379177)

摘　　要：为了评价黏土的分散性程度,以影响黏土分散性的物理、化学及矿物学指标为基础,利用主成分分析法(PCA)建立了黏土分散性评价模型。运用该模型对12组黏土土样的分散性程度大小进行了评价。结果表明,3号土样的分散性程度最大,6号土样的分散性程度最小,这与室内试验的观测结果相吻合。3号土样分散性程度最大的原因主要是由于该土样中蒙脱石的含量最高;此外,其中Na+的含量和易溶盐总量也相对较高。相反,6号土样中蒙脱石的含量最低,易溶盐总量和Na+含量相对较小,有机质和黏粒含量相对较大。该方法为分散性土的改性提供了理论参考依据。In order to evaluate the dispersion degree of clay, based on the influential factors such as the physical, chemical and mineralogical indicators, the evaluation model is established according to principal component analysis （PCA） method. The dispersion degree of 12 groups of clay sample is evaluated by this model. The results indicate that the dispersion degree of No. 3 soil sample is the largest because the content of montmorillonite is the highest and the sodium - ion and the total soluble salt are higher; on the contrary, the dispersion degree of No. 6 soil sample is the smallest, because the content of montmorillonite is the lowest and the sodium -ion and the total soluble salt are relatively smaller, also the organic matter and clay content is relatively large. The above results are consistent with the experimental ones. This method provides a theoretical basis for dispersive soil modification.

关 键 词：主成分分析法 分散性土 蒙脱石 标准变异 评价模型 

分 类 号：P642[天文地球—工程地质学]