西林水库面板堆石坝应力变形的三维非线性静力分析

Three-dimensional Nonlinear Static Analysis of the Stress Deformation of the Face Rockfill Dam of Xilin Reservoir

西林水库扩容工程采用的坝型为混凝土面板堆石坝,坝基砂砾石覆盖层最大厚度32.00 m,低弹模混凝土防渗墙、C25钢筋混凝土趾板和面板构成其防渗体系。采用三维非线性静力有限单元法开展竣工期和蓄水期坝体及防渗体系的应力变形分析,重点分析防渗体系在蓄水期水荷载作用下和竣工期堆石荷载作用下的应力变形以及周边缝、面板垂直缝和防渗墙与趾板接缝的变形。根据计算结果,提出相应的结论和建议,为大坝的科学施工及原型监测设计提供有力支撑。

Xilin reservior expansion project uses concrete face rockfill dam and sand gravel dam layer being 32.00 m. The anti-seepage system is low-modulus concrete anti-seepage wall,C25 reinforced concrete toe board and panel. In this paper,the three-dimensional nonlinear static finite element method is applied to the stress deformation analysis of the dam body and the impervious system during the completion period and the storage period,focusing on analyzing the stress deformation under water load storage period and under the load of the completion period and the deformation of perimetric joint,face clab vertical joint,joint of plinth and anti-seepage wall. According to the calculation,the corresponding conclusions and suggestions are put forward which can provide strong support for the dam＇s scientific construction and prototype monitoring design.