重力坝深层抗滑稳定安全系数理论公式的新解法

提出滑块的分合性原则，把双滑块体系的抗滑稳定问题同单滑块的抗滑稳定问题联系起来；提出滑动系数概念，证明了滑动系数符合以重量为权的加权平均原则；以对水平滑面双滑块摩擦模型的研究为过渡，提出了重力坝深层抗滑稳定分析中由K1、K2求K的理论公式；论述了安全系数的介值原则，并以之对现行刚体极限平衡法中的三种方法进行了评判。

New method of the theoretical formula of sliding-resistance stability and safty coefficient in deep foundation layer sliding-resistance system for gravity dam

By putting forward the disparting-combining principal of sliding block,the sliding-resistance stability problem of the two sliding blocks is associated with the single sliding block.By bringing forward the concept of sliding coefficient,it is proved that the sliding coefficient is fitted to the principal of weighted arithmetic average regarding the sliding block as weight.By regarding the research to friction-sliding model of two sliding blocks on a horizontal sliding surface as a transition research,the coefficient K of sliding resistance stability and safty which is ascertained by caculating the weight average value of the coefficient K_1(in upper-stream sliding block)and K_2(in down-stream sliding block)of sliding resistance stability and safty in deep layer foundation of gravity dam is given.The interposing value principal (i.e.K value interpose K_1 and K_2 value)of the stability and safty coefficient is discussed and described in this paper,and the three current methods (i.e. passive resisting-force method,remained pushing-force method,egual K value method)in using rigid body limit balance theory are evaluated.