中文摘要：

基于七参数流变模型的堆石料流变分析已在面板堆石坝应力变形分析中得到广泛采用,但目前关于该流变模型参数对于坝体应力变形的敏感性研究还不够深入。为此,本文采用正交试验法,以公伯峡面板堆石坝为依托,以坝体最大沉降位移V、面板挠度δ和面板顺坡向应力σ作为敏感性分析的主要试验指标,进行七参数流变模型参数关于这些试验指标的敏感性分析。结果表明,对指标V、δ、σ来讲,因素m1的影响最大,其次是b和m2,这3个参数的敏感性作用显著;而α、c、d和m3对各指标的影响不够显著,参数敏感性低。因此,在采用七参数流变模型进行面板堆石坝流变分析时,应将m1、b和m2作为流变参数分析与选择的重点。本文研究成果可以为面板堆石坝流变分析时合理选择流变模型参数提供参考依据。

英文摘要：

The seven-parameter rockfill rheological model has been widely applied in the numerical calculation of stress and deformation of the concrete faced rockfill dam, but the sensitivity analysis for the parameters of the rheological model on the dam stress and deformation is not deep enough. Based on the orthogonal test method, the Gongboxia concrete faced rockfill dam is taken as an example in this paper to conduct the sensitivity analysis of seven-parameter rockfill rheological model with major test indexes of the maximum vertical settlement displacement of the dam V, the maximum deflection of the panel δ and the stress isograms of the panel along the slope or. The results show that among the seven-parameters, for the indexes of V, δ and σ, the sensitivity of m1, b, m2 are relatively larger, and m1 is the largest, followed by b and m2; while the parameters of α, c, d and m3 have relatively small influence on each index. Therefore, when using the seven-parameter rockfill theological model to analyse the rheology of concrete faced rockfill dam, m1, b and m2 should be the key point in analyzing and selecting rheological parameters. The research methods and results of this paper can provide a reference for selecting the parameters for the sev- en-parameter rockfill theological model of concrete faced rockfill dam.