丹江口大坝后期加高工程现场原位抗剪试验研究

Study on Field Shear Test of Late Heightening Project of Danjiangkou Dam

介绍了丹江口大坝后期加高现场原位抗剪试验研究成果，内容包括：法向应力与峰值抗剪强度的关系；法向应力与残余抗剪强度的关系；法向应力与摩擦抗剪强度的关系；两种水泥混凝土剪切变形特性；剪切面特征及描述。研究成果为设计提供了新老混凝土结合面的抗剪参数，为抗滑移稳定性分析提供了依据，同时论证了大坝加高采用贴坡嵌固的施工方案的可行性。

The results of field shear test of the late heightening project of Danjiangkou Dam are introduced. The main contents include: three kinds of relationships(i.e.relation between normal stress and peak shear strength, relation between normal stress and residual shear strength, and relation between normal stress and frictional shear strength), the shear deformation properties of two kinds of cement concretes, the characteristics and description of shear faces. Based on these results, the shear parameters of cohesion face of new and old concrete and the basis of resisting slide stability analysis are provided. Finally, the construction plan of welting on slope and embedding for heightening dam is feasible.