据上海市标准《地基基础设计规范》DBJ08-11-89和国家标准《建筑地基基础设计规范》GBJ 7-89的规定,挡土墙的抗倾覆稳定安全系数K_o都取1.5,抗滑稳定安全系数K_c都取1.3。本文要讨论的问题是为何规定K_o大于K_c,究意是何意义。讨论中假设各符号的意义如下:ΣH──作用在挡土墙上的全部水平力(kN); According to Shanghai Standard “Code for Foundation Design” DBJ08-11-89 and National Standard “Standard for Design of Building Foundation” GBJ 7-89, the anti-overturning safety factor K_o of the retaining wall is taken as 1.5, anti-sliding stability and safety The coefficient K_c is taken as 1.3. The problem to be discussed in this paper is why K_o is greater than K_c, what is the meaning of the study. In the discussion, it is assumed that the meanings of the symbols are as follows: ΣH - the total horizontal force (kN) acting on the retaining wall;