清江水布垭坝址软弱夹层的变形机制为：（１）差异沉积作用造成了软弱夹层物质成分和结构构造上的差别，从本质上决定了软弱夹层的变形强度；（２）软沉积变形加强了软弱夹层物质的分异和软化；（３）构造活动导致软弱夹层发生多期次剪切滑动，使软弱夹层中的软弱物质泥化、叶理化并发生揉皱；使相对坚硬的结核和团块压扁、旋转和圆化 The deformation mechanism of the weak interbed of the Shuibuya dam site in the Qingjiang River is as follows: (1) The differential sedimentation results in the differences in the composition and structure of weak intercalations, which essentially determines the deformation strength of weak intercalations; (2) (3) The tectonic activities lead to multi-stage shear slips in the weak intercalations, muddy the weak ones in the weak intercalations, foliar physicochemical and crumpled leaves, and make the relatively hard tuberculosis and the mass Block crushed, rotated and rounded