中文摘要：

研究目的：武广客运专线对路基沉降控制要求非常严格,而沿线原状红粘土的大量室内试验结果表明,该地区红粘土各指标的离散性较大,在设计计算时,如何选取各指标的设计值,对设计结果会产生巨大的影响,直接影响工程的质量和造价;同时,反映红粘土性质的物理力学指标较多,许多变量之间又存在着相关性,增加了问题分析的复杂性,为了服务工程实际并对红粘土的整体性能进行评价,文章结合多元统计分析知识,利用统计软件SPSS,进行了统计分析、指标聚类分析和主成分分析。研究结论：通过统计分析获得了各指标的均值,置信区间。建议在设计过程中,除地质条件复杂或特殊路段外,采用均值进行设计计算;聚类分析表明红粘土的物理力学性质基本上可以分为结构、强度和状态3类;主成分分析表明可以利用综合主成分值进行红粘土路用性能的评价。

英文摘要：

Research purposes：Passenger dedicated line requires a strict deformation control,but the test results of the physical and mechanic parameters about original red clay along Wuchang-Guangzhou Dedicated Line have the large discreteness.The values of parameters used in design will cause a direct impact on the construction quality and cost,meanwhile the relevance among parameters increases the complexity for the analysis of problem.In order to make an evaluation of the red clay,the statistic analysis,hierarchical cluster analysis and principal component analysis have made with the theory of multivariate statistical analysis and statistical software SPSS.Research conclusions：Through statistic analysis,the means and 95% confidence interval of each parameter are obtained.It is suggest that means should be used in design,except the complex geological conditions,or special sections.The hierarchical cluster analysis indicates the property of red clay can be divided into three parts,namely the structure,strength and status,and the principal component analysis indicates that the values obtained from principal component analysis can be used to assess the possibility of red clay for road.