传力洞角度对拱坝坝肩稳定影响分析

Analysis of the Effect of the Concrete Plug Angle on the Abutment Stability of Arch Dam

摘要: 传力洞对处理拱坝软弱破碎带基础具有较好的效果，实际工程中应用也很普遍。本文通过建立拱坝及其基础的三维有限元模型，分析了不同传力洞布置方向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，但当传力洞轴线的布置方向不当时，也有可能反而不利滑裂面的抗滑稳定，这一点在实际工程的设计中尤其应该引起工程师们的重视。

Abstract: Concrete plug has a good effect on the treatment of soft broken of arch dam, and it is also widely used in practical engineering. The paper try to establish three-dimensional finite element model of arch dam and its foundation, and analyzes the different influence of the direction of concrete plug layout. The results show that concrete plug setting of soft fractured zone specific sliding surface sliding security pass is often beneficial, but when the direction of concrete plug axis is not suitable, there may be disadvantageous to sliding stability, which should be paid attention by the engineers in the design of practical engineering in attention.