中文摘要：

三峡库区滑坡岩土体多以碎石土为主,碎石的存在改变了土壤的渗透特性,进而影响滑坡体浸润线.采用数理统计的方法探讨了碎石含量对土体渗透特性的影响,并将其结果用于模拟不同库水位下降速度下碎石含量对滑坡体浸润线的影响.结果发现,滑坡体浸润线与碎石含量密切相关,碎石含量不同时浸润线表征出来的特点不同.库水位下降速度不同的情况下,相同碎石含量的滑坡体浸润线形状大致相同.库水位下降速度对碎石含量〈30%的滑坡体浸润线几乎无影响,对碎石含量〉55%的滑坡体浸润线影响最大,影响范围主要在远离库水位的滑坡体上部及坡顶.

英文摘要：

The gravel soil is the primary soil in Three Gorges Reservoir area and the existence of gravel will influence on the seepage line of the landslide by influencing on the permeable of the soil. Influence of the content of gravel on the seepage line of the landslide was researched by adopting the analytic mathematic statistics method. With the consequence, the influence of drawdown speed of water level with different hydraulic conductivity on the changing of the seepage line was analyzed by finite element method. As a result the seepage line of the landslide is closely related to the content of gravel. The seepage line shows the different characteristics in different contents of gravel. When the drawdown speed of water level in the reservoir is changed, the shape of seepage line in the same content of gravel is the same and it depends on the content of gravel. It is found that the drawdown speed has no effect on the seepage line in the content of gravel below 30 percent, but it has effect on the seepage line in the content of gravel above 55 percent. The impact area of water level variation on seepage line is on the top of the landslide.