侧翼锁固平面旋转式滑坡变形模式可以概化为横向均布荷载与轴向受压组合变形的悬臂梁模型。基于Rayleigh- Ritz能量法 ,建立了含裂缝悬臂梁的弹性挠度 -荷载曲线方程 ,利用断裂力学中的应力强度因子破坏准则确定悬臂梁极限承载力 ,导出滑坡稳定系数的解析公式 ,从而在理论上定量地论证了这类滑坡的动力学机理及稳定性判据 The deformation mode of the rotating landslide with flank locking plane can be generalized as a cantilever beam model with a combination of lateral uniform load and axial compression. Based on the Rayleigh-Ritz energy method, the elastic deflection-load curve equation of a cracked cantilever beam is established, and the ultimate bearing capacity of the cantilever beam is determined by using the failure criterion of stress intensity factor in fracture mechanics to derive the analytic formula of the stability coefficient of the landslide. The dynamic mechanism and stability criterion of such landslides are quantitatively demonstrated