六库水电站RCC纵向围堰堰基应力应变及稳定性分析

采用二维和三维非线性有限元分析方法,研究了六库水电站RCC纵向围堰堰基应力应变状态和稳定性。在此基础上对防渗墙各截面的剪力、轴力和弯矩进行计算研究,提出了配筋方案。计算表明,堰体位移大,堰体与防渗墙接头处附近存在应力集中现象,防渗墙的防渗效果显著,分载作用明显,右防渗墙承受的弯矩更大些,应加大其配筋率。

Analysis of stress-strain and stability of RCC longitudinal cofferdam foundation in Liuku hydropower station

The stress-train of longitudinal cofferdam foundation of Linkou hydropower station are studied by 2D and 3D non-liner finite element method. The shear, the axial force and the bending moment of governing section of seepage prevention sections of seepage prevention wall are calculated on this basis and puts forward the scheme of reinforcement. The result indicates that the displacement of cofferdam body is large, the stress concentration exists in the joint of cofferdam by body and seepage prevention wall. The effect of cofferdam is notable. The affect of sharing load is evident, the bending moment of right anti-seepage wall is larger, the reinforcement should be increased.