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1前言南水北调中线工程是缓解河南、河北和京津地区水资源危机的特大型跨流域调水工程,该工程线路长1427.17km,渠道沿线地质条件复杂,其中穿越膨胀岩土渠段累计长约340km,膨胀岩土因其特殊的工程性质,易造成渠道边坡失稳,对工程的安全运行产生严重危害,而且其处理难度大、处理措施投资费用高。膨胀岩土的渠坡处理是南水北调中线工程
1 Introduction The Middle Route of South-to-North Water Diversion Project is a special large-scale inter-basin water diversion project that relieves the water resources crisis in Henan, Hebei and Beijing-Tianjin. The route of the project is 1427.17km in length with complex geological conditions along the channels. Due to its special engineering properties, expansive rock and soil easily lead to instability of channel slope and cause serious harm to the safe operation of the project. Moreover, it is difficult to handle and the investment cost of treatment measures is high. Canal slope treatment of expansive rock and soil is the mid-route of South-to-North Water Diversion Project