基于北部引嫩总干渠分散性黏土特征与治理措施

分散性土是土中含有Na蒙脱石的土，在盐浓度低的水中分散性黏土迅速分散，土粒被带走，产生冲蚀。北部引嫩总干渠沿线均分布有分散土，对北引总干渠产生破坏。文章根据北部引嫩总干渠分散性黏土特征，提出了3个治理措施方案进行比较分析，最后推荐方案1，即采取明渠衬砌的隔离方案，即采用土工膜隔离分散土与低矿化度水，同时为了防止雨水和渠道内水的冲蚀作用，外部加混凝土板进行防冲保护的方案。

Discussion of Dispersive Clay Characteristics and Treatment Measures for Northern Nenjiang River Water Diversion Main Canal

Dispersive clay soil is the soil containing Na montmorillonite clay ,it will be dispersed rapidly at low salt concentrations in water ,soil particles are taken away and soil erosion takes place.There is a distribution of the dispersive clay along the Northern Nenjiang River Water Diversion Main Canal , leading to the damage for the canal.According to the characteristics of the clay along the main canal , three treatment measures are provided and analyzed.At last scheme 1 is recommended ,namely isolation scheme of canal lining.The scheme is to use geo membrane isolating dispersive clay and low salinity water,at the same time to protect the erosion of rainfall and water in the canal ,and to add the concrete slab on the outside of the canal .