一、概要土坝中的隐蔽裂缝,往往因为发生渗流潜蚀,造成严重恶果,甚至发展为垮坝灾祸,必须予以重视。土坝裂缝,是土坝不均匀变形极大发展的结果。这种不均匀变形,可以用短距离内两点间土坝的相对变位来反映。实践证明:在土坝的相对变位中,一般主要是沉降分量,水平位移次之。因此,用倾度γ来粗略地代表这种相对变位,从而判断土坝开裂是可能的。我们提出的上述倾度γ,定义如下: I. Overview Concealed cracks in earth dams often cause serious consequences due to seepage erosion and erosion and even lead to the collapse of disasters and must be taken seriously. Earth dam cracks, earth dam deformation is the result of great development. This inhomogeneous deformation can be reflected by the relative displacement of the earth dam between two points within a short distance. Practice has proved that: in the relative displacement of earth dam, generally the main component of settlement, followed by horizontal displacement. Therefore, it is possible to judge the earth dam cracking by roughly representing this relative displacement with the inclination γ. We propose the above inclination γ, defined as follows: