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A plane-torsion rockslide with a locked flank: A case study

机译:侧面锁定的平面扭转岩石滑坡:案例研究

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This paper presented a case history of a plane-torsion rockslide occurring on an oblique bankslope where the dip direction of foliated rocks intersects the dip direction of the slope. Because of the varietyof favorable bounding discontinuities,its movement is accompanied by counterclockwise rotation along a fault-controlled plane that dips moderately towards the valley. In this case the local restriction of sliding arisingfrom the locked flank causes a slender rock mass to spin about a hinge at the point where sliding is impeded.As a result,its failure mode can be generalized as a rock cantilever. By means of the Rayleigh-Ritz energymethod,an equation of elastic deflection-load of the rock cantilever with cracks is established,and its ultimatebeating capacity is established using the criterion of stress intensity factors in fracture mechanics. Consequently,a criterion for the stability of the rockslide is deduced. The criterion is proved to be feasible in engineering design.
机译:本文介绍了在斜坡上发生平面扭转岩石滑坡的案例,斜滑坡上叶状岩石的倾角方向与斜坡的倾角方向相交。由于有利的边界不连续性的多样性,它的运动伴随着沿断层控制平面的逆时针旋转,该平面向谷底倾斜。在这种情况下,由锁定侧面引起的局部滑动限制会导致细长的岩体在阻止滑动的点处绕铰链旋转。因此,其破坏模式可以概括为岩石悬臂。利用Rayleigh-Ritz能量法,建立了具有裂缝的岩石悬臂的弹性挠度-载荷方程,并以断裂力学中的应力强度因子为准则,建立了其极限跳动能力。因此,推导出了滑坡稳定性的判据。该标准在工程设计中被证明是可行的。

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