拱坝坝基弹模与传力洞增稳效果的相关性分析

Correlation Analysis Between Elastic Modulus of Dam Foundation and Reinforcement Effect of Concrete Plug

当拱坝基础有较大范围的不连续面或断层时,设置传力洞是一种较为有效的加固方案。然而,传力洞与坝肩岩体的相互作用机理却鲜见报道。以葫芦口水电站为工程实例,通过不断修改有限元模型中坝肩岩体的弹性模量,使用刚体极限平衡法分析了坝肩弹模与传力洞增稳效果的相关关系,结果显示坝肩弹模较低的情况下传力洞的增稳效果更好。

Concrete plug will be an effective reinforcement method when the arch dam foundation suffer to large range of discontinuity or fault. However, the interaction mechanism theory between concrete plug and dam foundation is rarely reported.Therefore, based on the case study of Hulukou Hydropower Station,elastic modulus of dam foundation was continuously modified in finite element model, the rigid limit equilibrium method was applied to analyze the relationship between the elastic modulus of dam foundation and the reinforcement effect of concrete plug.The results showed that lower elastic modulus of dam foundation would enhance the effect of concrete plug reinforcement.