中文摘要：

在介绍重力坝深层滑动破坏类型和刚体极限平衡分析法的基础上,指出现行混凝土重力坝设计规范（DL5108-1999）关于双斜面抗滑稳定设计表达式存在物理意义不明确及作用力、抗力不分等不合理之处,并给出更合理的设计表达式。算例结果表明,推荐的设计表达式不仅物理意义明确,而且结果也偏于安全,可供工程设计参考和讨论。

英文摘要：

Some problems such as fuzzy physical meaning,imperatively discerption of resistance and action involved in the wedge stability analysis method specified in the Gravity Dam Design Code（DL5108-1999）,are put for ward,based on introducing the destruction types of deep slide of gravity dam and rigid equilibrium limit method.And the reasonable expression of analysis presented in this paper is not only very clear but also the result is apt to safety through a practical engineering example.