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合理确定覆盖层和坝体的本构模型参数对正确预测覆盖层上面板坝应力应变特性十分重要。结合那兰水电站面板堆石坝变形观测资料及覆盖层大型载荷试验结果,采用“南水”双屈服面弹塑性模型反馈分析了坝体和覆盖层的本构模型参数,并采用反馈所得参数进一步分析了坝体的应力变形分布情况。结果表明,采用反馈分析参数计算所得的坝体变形与相应的实测值吻合较好。
It is very important to properly determine the constitutive model parameters of the overburden and the dam to correctly predict the stress and strain characteristics of the overlying dam. Combined with the deformation observation data and the large-scale load test results of the overlay rockfill dam of the Naland Hydropower Station, the constitutive model parameters of the dam body and the overburden layer are fed back using the double-yield surface elasto-plastic model of “Nanshui”, and the feedback parameters Parameters further analysis of the dam deformation and stress distribution. The results show that the calculated deformation of the dam using the feedback analysis parameters is in good agreement with the corresponding measured values.