含软弱夹层库岸复杂滑坡体形成机制

黄土坡复杂滑坡体形成机制研究对滑坡稳定性分析非常重要。通过地层对比并考虑软弱夹层的发育特征建立了巴东城区黄土坡斜坡原岩结构模型，斜坡前缘巴东组第三段上亚段岩体中软弱夹层发育密集，可与黄土坡滑坡深部多级滑带对应。数值模拟计算表明，斜坡在形成演化过程中斜坡前缘巴东组第三段上亚段岩体出现了明显的剪应变集中分布，变形深度与斜坡临江I号崩滑堆积体厚度基本一致，可见斜坡岩体结构和斜坡演化过程的应力应变特征控制了临江I号崩滑堆积体的形成。三峡水库蓄水后会加剧滑坡体的剪切变形，泥化夹层的存在容易诱发深层滑坡。 

Formation mechanism of complex landslide mass with soft interlayers in reservoir bank

The research of the formation mechanism of Huangtupo landslide complex body is very important to analyze the landslide. The original rock structure model of Huangtupo slope was built by strata correlation considering the development of weak intercalations. Weak intercalated layers developed intensively in T₂b3-2 rock mass of slope front corresponded to the deep multistage sliding zone in Huangtupo landslide. Simulation results show there are obvious shear stress and shear strain concentration in T₂b3-2 rock mass of slope front in the slope evolution, and the deformation influence depth can correspond to the thickness of No.1 part slide of Huangtupo landslide. The formation of No.1 part slide of Huangtupo landslide was controlled by rock mass structure of slope and its stress and strain characteristics during the slope evolution. The shear deformation of the landslide body would intensify because of the impounding of Three Gorges Reservoir. The muddy intercalations make the deep-seated landslide more easily slide.