中文摘要：

以一高速铁路工程地基泥岩为研究对象,结合高速铁路工程对地基变形的严格要求以及现场情况,对该地区的泥岩样本的膨胀潜势进行判定。对铁路沿线泥岩样本进行了Fisher判别分析,得出地基膨胀土判别与分类的判别函数。对判别函数进行了验证,判别结果与实际情况吻合良好。研究结果表明：Fisher判别函数对此高速铁路地基膨胀土的判别与分类简单可行,正确率高。

英文摘要：

Taking the foundation mudstone of one high speed railw ay as the research object, the discriminant for thesw elling potential of mudstone samples in this area was made by combing with the strict requirements of foundationdeformation for high speed railw ay engineering and site conditions, the fisher discriminant analysis of mudstonesample along the railway line w as implemented,and the discriminant function for foundation expansive soildiscriminant and classif ication was concluded. The discriminant function was verif ied and the discriminant results arein good agreement with the actual situation. The research results show that the Fisher discriminant function is simpleand feasible for the discriminant and classif ication of the foundation expansive soil in this high speed railw ay and hasa high accuracy .