西南某电厂高填方边坡不稳定变形的数值与物理模拟研究

Study on Numerical and Physical Simulation of Instable Deformation of High Fill Slope at a Power Plant in the Southwest

边坡稳定性问题一直是工程地质专业较突出的问题之一,而在稳定性分析过程中,高填方边坡的不稳定变形是工程设计、治理的最终核心问题。以西南某电厂高填方边坡为例,采用FLAC3D对高填方边坡进行三维实体模拟及变形计算,同时,利用降雨物理模拟试验对边坡变形进行验证分析。通过数值模拟和物理模拟试验,得出以下结论:降雨条件下,土体达到饱和时,边坡变形达到最大值,且产生应力集中现象,致使边坡发生进一步破坏;通过物理模拟验证边坡的具体变形,分析得出降雨对边坡造成变形的作用机理。

Slope stability is a prominent issue in the field of engineering geology, wherein the instable deformation of high fill slopes is a core problem relating to engineering design and treatment in the stability analysis. Taking a high fill slope at a power plant in the southwest as an example, the 3D physical simulation and deformation computation were conducted against it with FLAC3D software ; at the same time, using rainfall simulation experiment, the slope stability was verified. Through numerical and physical simulation, it was concluded that on the condition of rainfall, the soil mass reaches a state of saturation and the slope has a maximum deformation with stress concentration, resulting in further failure arising at the slope; through verification of specific deformation of slope from physical simulation, the mechanism of effect of rainfall on the slope deformation was analyzed.