中文摘要：

膨胀土胀缩性等级评价是膨胀土地区工程治理中的首要问题。本文探讨了基于集对分析的膨胀土胀缩性等级评价模型，以克服膨胀土胀缩性评价指标的不确定性和复杂性。模型以Vague集描述膨胀土胀缩性等级的确定＇1E$0不确定性，并应用集对分析构造Vague集的隶属【丞I数。通过实例应用及与其他方法评价结果的对比分析，表明该模型应用于膨胀土胀缩性等级评价是有效可行的，且具有判断结果准确、易于操作等优点。

英文摘要：

The evaluation of the amount of swelling and shrinkage in expansive clays is a key problem needing to be urgently solved for the purposes of engineering construction in areas of expansive clay. This paper discusses a model for evaluating the amount of swelling and shrinkage of expansive clay based on set pair analysis, which should overcome the uncertainty and complexity of the existing expansive soil swell-shrink evaluation index. The model describes the certainty and uncertainty of the amount of swelling and shrinkage in expansive clay using a vague-sets evaluation model, and generates a vague-set membership function with set pair analysis. On the basis of the application example and an evaluation of other methods, a comparative analysis shows that the model is effective and feasible when applied to the evaluation of the amount of expansive soil swelling and shrinkage. The results of the evaluation are accurate and the model is relatively simple to use.