Bank Slope Of Groundwater Regime And Stability

With the quick development of our national economy, more and more funds are thrown into hydropower projects. So failures of embankments due to the change of geological environment resulted by people's engineering activity. The major reasons are non-full understanding on embankments stability assessment and treatment, and complexity of interaction between water and embankments. Lots of studies have been done during past years.However,the theories and methods of research have seldom been progressed,as this or that kind of condition confines. The stability of embankments under the change of groundwater level has been discussed as the followings in the paper:1. Based on the previous study, the Boussinesq equation was applied to deduce mathematical model describing groundwater level under steady and transient state. Polynomial fitting method in Excel was used to obtain simple and applicable formula for practice. The formula laid theoretical basis for study on relation between groundwater level and embankments stability, mechanics analysis and numerical simulation.2. Influencing factors of embankments stability are systematically summarized. Based on the above mentioned formula, relation between embankments stability coefficient and factor influencing groundwater level variation was plotted, with aid of Lizheng slope analysis software, AutoCAD and Excel.3. Through study on factors influencing embankment slope stability, main assessment index was selected based on comprehensive study. AHP (Analytic Hierarchy Process) was used to determine weight vector and Fuzzy Comprehensive Judgment Method was applied to practice. Development evolution of stress field and deformation was predicted using Fast Lagrangian Analysis of Continua. Embankments stability was assessed using generalized limit-equilibrium method and engineering geology comprehensive analysis method, avoiding limitation of research application.