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为研究某水库高边坡的节理岩体抗剪强度参数,选取37个调查点进行统计计算,引入GSI地质强度指标,考虑岩体结构、结构面特征、岩块的抗压强度值,岩性的情况四个方面对其评分.采用了普遍适用的Hoek-Brown经验准则对边坡的白云质灰岩和灰岩材料参数进行计算,通过回归分析方法计算出了两种节理岩体的抗剪强度参数.结果表明GSI指标对强度参数值影响较大,尤其是粘聚力,白云质灰岩及灰岩的风化程度越强,粘聚力和内摩擦角及抗压强度值越小,并且得出了两种岩体强度参数的分布规律,其结果可为边坡的稳定性分析及防治提供可靠的依据.
In order to study the shear strength parameters of jointed rock mass in a high slope of a reservoir, 37 survey points were chosen for statistical calculation. The GSI geological strength index was introduced to consider the rock mass structure, structural plane characteristics, compressive strength of rock mass, lithology The Hoek-Brown empirical criteria were used to calculate the dolomitic limestone and limestone parameters of the slope, and the shear strength of two jointed rock masses was calculated by regression analysis The results show that the GSI index has a great influence on the strength parameters, especially the cohesion. The stronger the weathering degree of dolomitic limestone and limestone is, the smaller the cohesion, internal friction angle and compressive strength are and The distribution rules of two kinds of rock mass strength parameters are obtained. The results can provide a reliable basis for slope stability analysis and prevention.