狭窄河谷中高面板堆石坝应力变形特性研究

结合高179．5m的洪家渡面板堆石坝，采用数值计算分析与大型离心模型试验的方法，深入研究了狭窄河谷中高面板堆石坝的应力变形特性．通过分析计算，给出了狭窄、不对称河谷地形条件下高混凝土面板堆石坝在施工期和蓄水运行期的应力、变形分布规律，以及面板周边缝的变形特点．同时，还对不同填筑干密度对坝体和面板应力变形特性的影响进行了对比分析．研究结果表明：河谷的地形条件对面板应力变形有着显的影响，通过改进碾压施工技术，提高填筑密度，将对坝体和面板的应力变形性状的改善，提高坝体的整体安全性起到重要的作用．

Study on stress and deformation properties of high concrete face rock-fill dam in narrow valley

For the Hongjiadu Dam( a concrete face rock-fill dam with the height of 178. 5 m) ,the numerical analysis and centrifugal modeling are used for analyzing the stress and deformation properties of high CFRD in narrow valley. Based on the analysis concerned, the stress and deformation distribution and the displacement of the facing joints of the dam built in the unsymmetrical narrow valley during the construction and reservoir impounding periods are obtained from the analysis. And then, the impact of the rock-fill density variation on the stress properties of the slab is analyzed as well. The research results show that: the shape of river valley has significant impact on the stress and deformation status of CFRD. By improving the construction technology and increasing filling density, the stress and deformation properties of CFRD could be improved.