巴山水电站高折线面板堆石坝运行性状研究

以巴山水电站填筑及运行期的原型观测资料为依据，反演分析了坝体堆石料的非线性邓肯 E-B 模型参数，用观测资料验证了参数的合理性；以反演参数为依据，采用三维黏弹性有限元仿真计算了坝体开始填筑至经历 7.10 洪水后面板的应力变形情况，计算分析了面板连接缝变形和面板脱空、垫层料亏坡情况，分析了三期面板局部挤压破坏和裂缝的原因。分析表明：浇筑面板时堆石体沉降未收敛和初次蓄水时涨水过快是三期面板局部挤压破坏和裂缝的主要原因；经历洪水后连接板附近未出现拉应力区域，面板垂直缝及周边缝变形较小，三期面板顶部出现了轻微的脱空；面板折线处与周围变形协调性好，没有出现应力变形突变现象，设置连接板改善了面板的变形及受力状态，效果良好。

Behaviors of high broken line concrete face rockfill dam of Bashan Hydropower Station

The back analysis of the nonlinear Duncan E-B model parameters is carried out based on the prototype observation data of Bashan concrete face rockfill dam during the filling and operation periods.The observed data are employed to validate the rationality of the parameters.According to the back analysis parameters,three-dimensional viscoelastic finite element simulation is performed to calculate the stress and deformation of faceslab during the period from the filling of the dam to the end of flood 7.10.The ...