有限元强度折减法在涉水岸坡工程中的应用

随着大中型水库的陆续兴建,形成了大量的涉水岸坡,库水水位的波动将影响这些岸坡的稳定性,可能诱发水库滑坡,甚至形成地质灾害.库水水位的变化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.目前,设计人员大都采用经验概化,或者照搬规范的方法,使设计中主观性和定性的成分比较高.本文重点介绍了作者近几年围绕涉水岸坡的稳定性分析所取得的一些研究成果.其中,包括库水水位变化过程中浸润面位置的求解、有限元强度折减法在涉水岸坡稳定性分析及埋入式抗滑桩治理工程中的应用.

Application of strength reduction FEM in fording slope

With the construction of large and medium sized reservoirs, a lot of fording slopes appear and the change of reservoir water level will influence the slope stability, which would lead to landslides, even geological hazards. The stability analysis becomes very complicated since the fluctuation of water level would cause unstable seepage for the underground water inside the slope. At present, researchers mostly adopt the methods of empirical generalization or copy standards in practical engineering, which will make the design subjective and qualitative. So the researches on the methods of stability analysis are significant to engineering safety, environment protection and hazard prevention both theoretically and practically. In the paper, some achievements of stability analysis by the authors are introduced, including the solution to phreatic surface during the change of water level, the application of strength reduction FEM in stability analysis and the application of embedded anti-slide piles in the controlling engineering.