论文部分内容阅读
堆石体的变形是长期而复杂的过程,其变形包括瞬时变形和随时间变化的流变变形,过大的长期变形将对大坝的安全运行产生影响.采用长科院幂函数流变本构模型,对双江口300m级心墙堆石坝长期变形进行了三维有限元仿真分析,根据堆石料尺寸效应的流变试验资料,初步探讨尺寸效应对高堆石坝长期变形的影响.分析结果表明:双江口心墙堆石坝在大坝满蓄后3年大坝变形基本趋于稳定,变形量在可控制范围之内;尺寸效应对高堆石坝长期变形影响明显,与实际堆石体相比,缩尺后的室内堆石试样表现出较小的长期变形,对大坝变形的预测精度有一定影响.
The deformation of the rockfill body is a long-term and complex process, the deformation of which includes the instantaneous deformation and the rheological deformation with time, and the long-term deformation of the rockfill body will have an impact on the safe operation of the dam. Dimensional finite element simulation analysis of the long-term deformation of the 300m core rockfill dam in Shuangjiangkou, the preliminary study of the effect of size effect on the long-term deformation of the rockfill dam is made based on the rheological test data of the size effect of rockfill materials. The results show that the dam deformation of Shuangjiangkou core rockfill dam basically stabilizes 3 years after the dam is fully charged and the deformation is within the controllable range. The size effect has a significant effect on the long-term deformation of the rockfill dam, Compared to the body, the small-scale indoor rockfill samples show smaller long-term deformation, which has a certain impact on the prediction accuracy of dam deformation.