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三峡二期围堰于 1 998年建成挡水 ,运行状况良好 .本文首先根据实际观测资料 ,分析了三峡二期上游围堰双墙的变形机理 ,又通过各种情况的有限元计算 ,包括墙体不同龄期、上游水位变动、墙间水位变动以及改变堰体材料参数对上下防渗墙位移及应力的影响 ,分析了各种可能的应力状态 .所得结果对于防渗墙的安全运行具有指导意义
The Second Stage Cofferdam of the Three Gorges Project was built into a water retaining structure in 1998 and is in good condition. Based on the actual observation data, the deformation mechanism of the double wall of the upstream cofferdam of the Three Gorges Project is analyzed. The finite element method The influence of the different water level, the change of water level in the upper reaches, the change of the water level in the wall and the material parameters of the weir on the displacement and stress of the upper and lower impervious walls were analyzed, and various possible stress states were analyzed.The results obtained were helpful to the safe operation of the impervious wall significance