离散单元法在水库库岸滑坡稳定性分析中的应用  

Discrete element method applied to stability analysis of landslides along reservoir shoreline

作　　者：刘礼领[1] 殷坤龙[1] 

机构地区：[1]中国地质大学工程学院土木系,武汉430074

出　　处：《水文地质工程地质》2003年第4期63-66,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金项目(40072084)

摘　　要：在现场勘察和室内试验的基础上,建立了离散单元法的物理力学模型,并且考虑到水库蓄水对地下水渗流场的影响,定量地研究了地下水动水压力对滑坡体稳定性的影响。把该模型应用于三峡库区秭归县下土地岭滑坡的稳定性评价中,计算结果表明,滑坡的失稳主要是由于水库蓄水的影响,滑坡体内的地下水渗流场发生了变化,在自重力、地下水动水压力的共同作用下,滑坡体的后缘和中部滑体首先出现剪切滑移,进而扩展到整个滑坡体,使滑坡产生整体失稳。Based on field investigation and lab tests, this paper establishes the physics mechanism model of discrete element method considering groundwater seepage field when the reservoir is filling. It is studied the definite quantity effect of groundwater dynamic pressure on the landslide stability. Then the approach is applied to the landslide stability analysis in the Xiatudiling, the Three Gorge's reservoir area. The result showed that the failure of landslide is caused by the selfgravity, groundwater dynamic pressure and earthquake force when the reservoir is filling; the groundwater seepage field in the landslide body is changing. At first the shearsliding field appears in the middle and the trailing edge, then it scatters the whole landslide body, the whole landslide destroys together.

关 键 词：离散单元法 库岸滑坡 稳定性分析 物理力学模型 水库蓄水 地下水 动水压力 渗流场 

分 类 号：TV697.3[水利工程—水利水电工程] TV223.31