三马山滑坡渗透系数反演分析  

Study on the Inversion Method of Selecting Seepage Parameter for Sanma Mountain Landslide

作　　者：王凯[1] 汤明高[1] 许强[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《人民黄河》2013年第4期124-126,共3页Yellow River

基　　金：国家自然科学基金资助项目(41002111);三峡库区三期地质灾害防治重大科研项目(SXKY3-1-1-200901)

摘　　要：在水库岸坡渗流场及稳定性分析研究中,渗透系数的取值至关重要。采用Geo-studio二维有限元分析软件中的渗流分析模块Seep/w,对三峡库区三马山滑坡进行了渗透系数反演分析。首先以勘察期的水库稳定水位为水头边界条件,以现场简易渗透试验所得渗透系数为参考,进行地质建模;然后进行各种工况条件下的渗流分析及反演,确定库岸边坡的渗透系数。反演所得的渗透系数与现场试验所得的渗透系数属同一数量级,模拟的浸润线和勘察得到的浸润线基本重合,表明通过渗流反演确定渗透系数的方法是可行的。In the study of the seepage of reservoir slope, it is vital to define the accurate value of the permeability coefficient. In this paper, we set the Seep/w module of Geo-studio 2D finite software as a platform to carry out the parameter inversion for the Sanma Mountain landslide in the Three Gorges Area. First of all, referring to the permeability coefficients got by the field test, we set the steady water got during the prospection as the head boundary condition and built up the geologic model. Secondly, on the basis of the model we built, we solved the problem of seepage parameter inversion for the different conditions of the landslide. Finally, the result shows that the inverted permeability coefficients and the permeability coeffi- cients got by the field test are in the same order of magnitude, the water table computed by the software and the counterpart got by the field investi- gation are overlap, so it＇s proved that method is reasonable.

关 键 词：渗透系数 数值模拟 反演分析 稳定性分析 三马山滑坡 

分 类 号：P642.22[天文地球—工程地质学] S152.72[天文地球—地质矿产勘探]