《建筑地基基础设计规范》（ＧＢＪ７ -８９）（以下简称规范）中给出了单独基础软弱下卧层承载力验算公式。当相邻基础按规范压力扩散角传到软弱下卧层顶的附加压应力不产生重叠时（图１） ,按此进行验算是合适的和正确的。但是 ,实际工程设计时常遇几个相邻基础靠得较近、按? The formula for calculating the bearing capacity of the subsoil beneath a single foundation is given in “Code for Design of Foundation of Building Foundation” (GBJ7 -89) (hereinafter referred to as the code). When the adjacent foundation according to the standard pressure spread angle reached the weak sub-layer of the top of the additional compressive stress does not overlap (Figure 1), according to this check is appropriate and correct. However, the actual engineering design sometimes close to a few neighbors, according to?