堆石混凝土重力坝应力变形及稳定分析

Analysis on Stress Deformation and Stability of Rock-fill Concrete Gravity Dam

摘要:

海内外各类坝体建设工程已大范围使用堆石混凝土筑坝技术，堆石混凝土坝体的受力及稳定分析关乎坝体安全运行。选取某堆石混凝土重力坝非溢流岸坡坝段，采用材料力学法对其典型剖面抗滑稳定性进行计算复核。根据复核结果，采用三维有限元方法对该坝段的变形场及应力场的分布规律进行了深入分析。计算结果表明，材料力学法仅反映了坝段典型剖面的稳定情况，有限元法可考虑空间结构变形协调及库盘变形因素影响，建议结合三维有限元法分析坝体稳定情况。

Abstract:

Rock-fill concrete damming technology has been widely used in various dam construction projects at home and abroad. The analysis on stress and stability of rock-fill concrete dams is crucial for the safe operation of dams. A non-overflow bank slope section of a rock-fill concrete gravity dam is selected, and the anti-sliding stability of its typical profile is calculated and rechecked by using the material mechanics method. Based on the rechecked results, an in-depth analysis on the distribution patterns of deformation and stress fields in this dam section is conducted by using the three-dimensional finite element method. The calculation results indicate that the material mechanics method only reflects the stability of the typical cross-section of the dam section, while the finite element method can consider the influence of spatial structural deformation coordination and reservoir basin deformation factors. It is recommended to combine the three-dimensional finite element method to analyze the stability of the dam body.