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摘要：膨胀土具有胀缩性、裂隙性、超固结性，其工程性质特殊，即使很缓的边坡也可能失稳，南水北调中线工程膨胀岩土渠段长达340km，渠坡的处理技术、分析方法与长期稳定性是关键问题。分析了非饱和膨胀土边坡的破坏特点、破坏机理与影响因素，并对处理措施的作用机理与模拟方法进行了分析，在此基础上探讨了非饱和膨胀土边坡稳定性的分析方法，并对南水北调中线工程新乡段膨胀岩土渠坡进行了分析，得到了初步成果。

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