中文摘要：

从膨胀土裂隙分类方法、裂隙量测方法、裂隙统计分析方法3个方面对已有膨胀土裂隙特征的研究方法和成果进行归纳总结，简要分析目前研究中存在的问题和不足。建议开展裂隙深度量测、统计分析方法、裂隙深度与表面特征关系的研究，以及对裂隙图像信息处理方法等方面进行深入研究。

英文摘要：

As a foundation of crack research, crack features of expansive soils have great significance to the stability of exparksive soil slopes. In this paper, research methods and achievements of crack features of expansive soils are reviewed, with attention to the aspects of classification methods, measurement methods, and statistical analysis methods. The existing problems and defects are briefly analyzed. The authors suggest performing further studies on the measurement of crack depth, statistical analysis methods, relationships between depths and surface characteristics of cracks, crack image acquisition and information processing methods.