传力洞截面对拱坝坝肩稳定的影响

Effect of Concrete Plug Section on Abutment Stability of Arch Dam

传力洞对处理拱坝软弱破碎带基础具有较好的效果,实际工程中应用很普遍.通过建立拱坝及其基础的三维有限元模型,分析了不同半径传力洞对软弱基础中特定滑裂面抗滑稳定安全系数的影响,结果表明:传力洞的设置对软弱破碎带内的特定滑裂面抗滑安全通常是有利的,但当传力洞半径设置不当时,有可能反而不利滑裂面的抗滑稳定.

Concrete plug has a good effect on the treatment of soft fracture zone of arch dams,and it is also widely used in practical engineering.The three-dimensional finite element model of arch dam and its foundation is modeled,and the influence of concrete plugs with different semidiameter on anti-sliding stability of specific sliding surface in soft foundation is also analyzed.The results show that the setting of concrete plugs is often beneficial to the specific sliding surface in soft fracture zone,but when the semidiameter of the concrete plugs is not suitable,there may be disadvantageous to sliding stability,as an added note.