水-岩耦合三维有限元法在滑坡分析中的应用  

Application of 3-D Finite Element Method with Water and Rock-Soil Coupling in Landslide Research

作　　者：马淑芝[1] 贾洪彪[2] 唐辉明[2] 刘佑荣[2] 

机构地区：[1]武汉理工大学土木工程学院,武汉430070 [2]中国地质大学工程学院,武汉430074

出　　处：《地质科技情报》2006年第6期91-95,共5页Geological Science and Technology Information

基　　金：国家自然科学基金项目(40072085)

摘　　要：赵树岭滑坡是三峡库区大型滑坡之一,其稳定性直接关系着巴东新县城沿江大道的安全和新县城土地的规划利用。在分析赵树岭滑坡基本特征的基础上,运用水-岩耦合三维有限元数值模拟对不同库水位变动状态下的地下水水位变化和滑坡稳定性进行了分析,预测了三峡水库蓄水后滑坡稳定性的发展趋势和地下水渗流特征。模拟结果表明,水库蓄水及水位波动是影响滑坡稳定性的最主要因素,蓄水后滑坡稳定性明显恶化,必须加以治理;水-岩耦合有限元法可以较好地考虑岩土体多相系统内应力场和渗流场的互相影响,能够阐明库水位变动对地下水带来的改变及其与滑坡稳定性的关系,可用于分析、评价受地表水和地下水影响明显的大型滑坡的稳定性。Zhaoshuling landslide is one of the most famous landslides in the Three Gorges Reservoir. Its stability directly affects the safety of the main road along the river and land using of new county-site. Based on the landslide basic characters, the change of groundwater table and the stability of landslide under different water tables of the reservoir are simulated with 3-D finite element method of water and rocksoil coupling, and the development trend and the seepage characters are predicted in this paper. The simulation results show that the change of reservoir＇s water table is mainly responsible for the landslides stability and that this landslide should be taken when the stability becomes worse under control. In this paper, it is testified that the finite element method of water and rock-soil coupling can analyze the infections of stress field and seepage field in the multiphase system of rock-soil body, clarify the connection of landslide stability and the change of groundwater caused by the change of reservoir＇s water table. Hence, it can be used to analyze the landslide＇s stability affected by surface water and ground water.

关 键 词：水-岩耦合 有限元法 滑坡稳定性 

分 类 号：P628.3[天文地球—地质矿产勘探]