涉水岸坡稳定性分析相关问题的研究

Research on some issues related to stability analysis of reservoir banks

大中型水库的兴建形成了大量的涉水岸坡,库水水位的波动将对这些岸坡的稳定性产生影响,可能诱发滑坡甚至形成地质灾害,也将引起岸坡体内地下水的非稳态渗流,因此其稳定性分析变得十分复杂。文章通过实际算例,并结合有限元强度折减法,分析了影响涉水岸坡稳定性的因素,结果表明,有限元边界范围、渗流方向对涉水岸坡的稳定性有明显的影响;概化浸润面位置的差异是造成稳定性分析误差的主要原因。

The completion and construction of large and medium-sized reservoirs naturally form many banks and the water level changes will influence the stability of the banks, which may cause landslides, even geological hazards. Considering that the changes of the water level will lead to unstable seepage of the underground water in the banks, the analysis of stability is very complicated. In the paper, based on the strength reduction finite element method, some practical calculation examples are presented in order to analyze the factors influencing the stability of the banks. The results show that both the boundary scope of finite elements and the seepage direction have a significant impact, and that the difference in the generalized infiltration position is the main reason for the error of stability analysis.