南水北调中线工程膨胀土渠坡柔性衬砌技术探讨

膨胀土是一个世界范围内的问题，其危害性大，工程建设中应采取有效的工程措施对其进行处理。结合南水北调中线工程输水干渠膨胀土的工程特性深入论证了进行渠坡柔性衬砌的必要性，并提出了系统的设计思路。重点论证膨润土防水毯作为防渗垫层的技术可行性和优越性。对于衬砌面层，重点探讨了混凝土模袋，特别是新型带种植孔混凝土模袋的技术可行性以及使用方法。

Flexible Liner System of Canal Slopes with the Expansive Soil in the Middle Route Project of the South-to-North Water Diversion

Expansive soils are a worldwide problem and have caused considerable damage to buildings,roads,and other structures,thus proper measures should be employed to deal with the problem.The South-to-North Water Diversion Middle Route Project has also encounter the expansive soil problem.The flexible liner system along canal slopes was discussed in detail with respect to the properties of the related expansive soil as well as the design methods.Geo-synthetic Clay Liner(GCL) was proposed as the lower liner layer and its feasibility and advantages were presented.Meanwhile,the paper highlighted the Fariform revetment system as the upper layer of the flexible liner system.Especially,the Revetment Greenification Mat invented by a Japanese company was paid more attentions due to its environmentally friendly compatibility.