南水北调中线工程总干渠穿越膨胀土（岩）地段累计长约 386.8 km ，膨胀土（岩）的处理是南水北调中线工程的主要技术问题之一。国家“十一五”科技支撑计划课题“膨胀土地段渠道破坏机理和处理技术研究”项目，通过多种研究手段综合研究了膨胀土（岩）渠坡破坏机理，提出了适合的膨胀土（岩）渠坡稳定性分析方法，并针对性地研究了膨胀土（岩）渠道的处理措施，在试验渠段进行了现场验证比较，提出了经济可行的处理方案。较为系统地综述介绍了该课题的研究内容、技术路线、取得进展和主要结论，研究成果不仅为南水北调中线工程膨胀土（岩）渠坡处理提出更为可靠合理的解决方案，其研究思路和成果也可供类似研究和工程应用参考。

The length of the South-to-North Water-Transfer Project general canal involving the expansive soil (rock) is approximately 386.8 km. The treatment of the expansive soil (rock) is the main technical problem to be tackled. In the project supported by the National Key Technology R&D Program, various research means have been employed to investigate the failure mechanism of the expansive soil (rock) cannel slope comprehensively. The slope stability analysis method for the expansive soil cannel slopes has been proposed, the economic and applicable treatment measures have been put forward. In this paper, the research content, technical route are introduced and the results of the project systemically illustrated. The research results could also provide reference for the relevant research and engineering projects.