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建筑在复杂岩基上的拱坝和坝肩的变形、应力和稳定分析是一个涉及面广而且十分复杂的问题,采用传统的常规分析方法难以充分反映不连续面的影响、坝与基础的联合作用以及应力场与渗流场的耦合作用等综合问题。本文简要介绍了笔者在复杂岩基上的拱坝及坝肩的整体三维非线性有限元及拟合分析方法等方面进行的研究工作。研究表明:运用数值分析方法进行拱坝和岩基的整体非线性力学分析与渗流分析,结合原型观测资料进行拟合分析,可以获得比较接近实际的应力场和渗流场。文章最后介绍了上述理论在龙羊峡重力拱坝、东江双曲拱坝与坝肩岩体稳定分析中的应用。
The deformation, stress and stability analysis of arch dam and abutment built on complex rock foundation are a wide and complicated issue. It is difficult to reflect the influence of discontinuity by traditional routine analysis method. The combination of dam and foundation Role and the interaction between stress field and seepage field. This paper briefly introduces the author’s research on the three-dimensional nonlinear finite element method and fitting analysis method of arch dam and abutment on complex rock foundation. The research shows that the numerical analysis can be used to analyze the overall nonlinear mechanical analysis and seepage of arch dams and rockfill basins, and the fitting analysis based on the observation data of the prototype can obtain the stress field and seepage field relatively close to the actual ones. Finally, the article introduces the application of the above theory in the stability analysis of Longyangxia gravity arch dam, Dongjiang double curvature arch dam and abutment rock mass.