重点介绍了土工格栅、土工袋 2 种土工合成材料在南水北调中线工程膨胀岩渠段渠坡处理工程中的应用情况、施工工艺等，结合现场原位试验对 2 种工程处理措施的效果进行了初步的探讨。研究结果认为， 2 种处理措施均对膨胀岩渠坡有一定的保护作用，土工格栅加筋处理措施的防渗性能和抑制膨胀变形的效果更好。

The application of the geosynthetic in expansive rock canal slope treatment of the South-to-North Water Diversion Project is illustrated. The operation methods of the geogrid, soilbag, geomembrance, etc., in the canal treatments are introduced. The field tests are carried out to preliminarily discuss the effect of different reinforcements. The research results show that two treament measures for the canal slope of expansive rock have certain protective effect, of which the geomenbrance with reinforcement possesses much better effect to antiseepage and restricting expansion deformation.