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目前针对200m级高面板堆石坝面板脱空机理的研究较少,而国内已建的部分高面板堆石坝均出现不同程度的面板脱空现象。为研究面板脱空影响因素,利用三维非线性有限元对高面板堆石坝进行全方位结构计算,从力学机理上对面板脱空的主要影响因子(堆石流变、施工分期和筑坝材料等)进行深入分析。结果表明,200m级高面板堆石坝面板脱空受多种因素的相互影响,堆石体流变使面板脱空趋势变大,抗剪强度高的堆石体可减小面板脱空范围,优化施工顺序对控制面板脱空有利。
At present, there are few researches on the mechanism of the panel voidage of 200m-high CFRD, while some of the existing high-rise rockfill dams in China have experienced different degrees of panel voidage. In order to study the influencing factors of the panel voidage, the three-dimensional nonlinear finite element method is used to calculate the omnidirectional structure of the high concrete face rockfill dam. From the mechanics, the main influencing factors of the panel voidage (rockfill rheology, construction staging and damming materials Etc.) for in-depth analysis. The results show that the voidage of the 200m high concrete face rockfill dam is influenced by many factors. The rheological behavior of the rockfill body increases the voidage of the faceplate. The rockfill body with high shear strength can reduce the void area of the faceplate, Optimize the construction sequence of the control panel is empty.