基于Barton-Bandis准则下水力驱动型岩质边坡的稳定性分析

Analysis on Stability of Hydraulic-Driven Rock Slope Based on Barton-Bandis Failure Criterion

为了将水力作用下岩质边坡稳定性的评价方法与Barton-Bandis非线性破坏准则相结合,探讨了Barton-Bandis准则参数到Mohr-Coulomb准则参数转换的两种常用方法,并推导出了不同计算方法下边坡抗滑稳定性的表达式,然后进行算例分析。结果表明:直接利用J_(RC)-J_(CS)模型计算水力作用下边坡的稳定性是可行的;且在单因素影响下,边坡抗滑稳定性系数与裂隙水深h、坡高H和层面倾角α呈负相关,可分别用线性函数、幂函数来描述,而与J_(CS),J_(RC)和φ_b呈正相关,可分别用对数、指数方程来描述;对于裂隙水深h而言,其对等效c,φ值的影响恰好相反,但均可用线性函数拟合,而临界裂隙水深h_(cr)与J_(CS)和J_(RC)的关系分别符合对数、指数特征。

In order to combine evaluation method of rock slope stability under the hydraulic pressure and the Barton-Bandis nonlinear failure criterion,two common transfer methods from Barton-Bandis criterion parameters to the Mohr-Coulomb criterion parameters were explored.Following this idea,the anti-sliding stability formula was deduced by different calculation methods.Ultimately,according to the calculation example analysis,the results show that study on the anti-sliding stability factor of rock slope by J_（RC）-J_（CS） model is feasible;and under the single factor influence,there is a negative correlation among anti-sliding stability factor of fissure water depth in rock slopes,slope height and plane angle.This can be respectively described by linear function and power function,and they show positive correlations among anti-sliding stability factor and J_（CS） and J_（RC）andφ_b,which can be respectively described by Logarithm and exponential equation;as to fissure water depth,the influence that casts upon equivalents of c,φis opponent,but the relationship between them also can be fitted by linear function,and the relationships between critical fissure water depth and J_（CS）,J_（RC） are respectively fitted by logarithmic and exponential.