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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 the in situ shear test at elevated site of Danjiangkou Dam in the later stage are introduced, including the relationship between normal stress and peak shear strength, the relationship between normal stress and residual shear strength, normal stress and frictional shear strength The relationship between the two kinds of concrete shear deformation characteristics; shear surface characteristics and description. The research results provide the design parameters for the shear resistance of the new-old concrete joints, which provide the basis for the analysis of the anti-slip stability. Meanwhile, the feasibility of applying the construction plan of the slope embedding is demonstrated.