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采用非线性有限元分析方法,建立了坝体和坝基的三维有限元模型,通过改变岸坡坡度,对深厚覆盖层上面板堆石坝的坝体及面板变形的变化规律进行计算分析。研究了河谷形状和深覆盖层对面板堆石坝的变形特性的影响。研究结果表明:建在深厚覆盖层上的面板堆石坝,坝基覆盖层对上部坝体的沉降变形有明显的影响,坝体和坝基的沉降数值随着岸坡坡度的逐渐变缓而增大;面板底部的最大挠度较建在基岩上的有所增大,而且随着岸坡坡度的变缓,也呈现出逐渐增大的趋势。
By using the nonlinear finite element analysis method, the three-dimensional finite element model of the dam body and the dam foundation is established. By changing the slope of the slope, the variation rules of the dam body and the panel deformation of the deep overburden rockfill dam are calculated and analyzed. The influence of valley shape and deep overburden on the deformation characteristics of CFRD was studied. The results show that the concrete cover of the dam has a significant influence on the settlement and deformation of the upper dam, and the settlement value of the dam and dam foundation increases with the gradual decrease of the bank slope. The maximum deflection at the bottom of the panel is larger than that built on the bedrock, and tends to increase gradually as the slope of the bank slopes slowly.