[最新文献]受Hoek-Brown破坏准则约束的完整岩石边坡三维稳定性评估[12/05/2020]
1 论文
Three-dimensional stability assessment of slopes in intact rock governed by the Hoek-Brown failure criterion 受Hoek-Brown破坏准则约束的完整岩石边坡三维稳定性评估
Abstract: Three-dimensional failure analyses of slopes are rather elaborate, and for rock slopes, where the rock strength is defined by nonlinear failure envelopes, they are particularly intricate. This is why many earlier approaches used a linear approximation of the strength envelope prior to carrying out the stability analysis. This approximation is avoided in this paper, thanks to using the parametric form of the Hoek-Brown failure criterion. The kinematic approach of limit analysis is used as the method of study. An argument is brought forward that even though rocks tend to fracture at low confining stresses, the ductility of deformation prior to a brittle drop in stress during failure may be sufficient for limit analysis theorems to be applicable. Two measures of rock slope stability are evaluated: the stability number and the factor of safety. Numerical results are presented in the form of charts and tables. Because the limit analysis used allows one to evaluate the rigorous bounds on true solutions, it was possible to demonstrate that the method employed in the paper yields more accurate results than the approaches used formerly in the subject literature. A new and efficient mechanism of failure was devised for very narrow rock slopes.
摘要：边坡的三维破坏分析相当复杂，对于岩石边坡来说，由于岩石强度由非线性破坏包络线定义，因此分析特别复杂。这就是为什么许多早期的方法在进行稳定性分析之前使用强度包络的线性近似。在本文中，由于使用了Hoek-Brown破坏准则的参数化形式，避免了这种近似。采用极限分析的运动学方法作为研究方法。提出了一个论点，即即使岩石在低约束应力下倾向于断裂，但在破坏过程中应力脆性下降之前的变形延展性可能足以使极限分析定理适用。评价了岩石边坡稳定性的两个措施：稳定性数和安全系数。数值结果以图和表的形式呈现。由于采用的极限分析可以评价真实解的严格界限，因此可以证明本文采用的方法比以前主题文献中采用的方法得到的结果更准确。对于非常狭窄的岩石边坡，设计了一种新的、有效的破坏机制。
2 相关文献
Note: '相关文献' 是按照Google的排序算法产生出来的.
[1] 3D limit equilibrium method for rock slope stability analysis using generalised anisotropic material model
[2] Three-dimensional analysis of pit slope stability in anisotropic rock masses
[3] Three-dimensional numerical analysis for rock slope stability using shear strength reduction method
[4] Analytical and numerical analyses for rock slope stability using the generalized Hoek-Brown criterion
[5] Probabilistic assessment of rock slopes stability using the response surface approach – A case study
[6] Analytical solutions to assess the stability of rock slopes subject to cracks via limit analysis
[7] Rock slope stability assessment using finite element based modelling
[8] Recent advances in the stability assessment of natural and engineered rock slopes
[9] Numerical modeling of rock-slope instability
[10] Characterisation of High Rock Slopes using an Integrated Numerical Modelling - Remote Sensing Approach
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