中文摘要：

文章基于区间联系隶属度概念描述实测指标与标准等级间的同、异、反关系，进而构建膨胀土和改良土胀缩性评价新模型，并通过二元联系集对势表达待评样本的胀缩性等级，以克服区间数难以比较的缺陷。实例应用及与其他方法对比分析表明，该模型应用于膨胀土和改良土胀缩性评价是有效可行的，评价结果能充分反映实际数据区间波动特点。

英文摘要：

A novel evaluation model of swelling-shrinkage grade for untreated and treated expansive clays using the interval connectional membership degree is presented to depict the identical-discrepancy-contrary relation- ships between the indexes of measured samples and classification standards of swelling-shrinkage grade. And the swelling-shrinkage grade is further expressed as the set pair potential of two-element connection number to overcome the defect that the interval number is difficult to compare. The results of case study and comparison with other methods show that the proposed model is effective and feasible, and the evaluation results can fully reflect the fluctuation characteristics of actual data.