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本文结合我国东北F大坝32~#坝段的横向扬压力观测资料,用物理推断法和统计相关法选择扬压力统计模型的因子。文中着重对时效因子进行研究,选择三种不同的时效模型与水压因子进行组合,从而用逐步回归分析法求出扬压力的最佳统计模型及回归方程。该模型不仅与当日水头有关,而且与用时效因子表示的坝踵附近的泥沙淤积程度有关。用该统计模型分析实测资料,其分析结果与实测值拟合较好。
In this paper, based on the observation data of lateral uplift pressure in 32 # section of F dam in northeastern China, the factors of uplift pressure statistical model are selected by physical inference method and statistical correlation method. This paper focuses on the aging factor study, select three different aging model and hydraulic factor combination, so as to obtain the best stepwise regression analysis of the best statistical model and regression equation. The model is related not only to the head of the day but also to the degree of sedimentation near the dam heel, which is indicated by the age factor. Using the statistical model to analyze the measured data, the analysis result is fit well with the measured data.