在箱形基础下加桩，以满足加强承载力和防止变形要求.桩-箱基础系由底板、顶板外墙、内纵横墙构成箱形结构，把上部荷载分配给桩。本文提出桩-箱分析与计算方法。

Combined with practical engineering example of a synthetic office building for the Shanghai Minitary Police Command School, the pile box foundation was used by adding piles under the box-typed foundation to fulfill the requirements for enhancing the bearing capacity and preventing the deformation. This pile-box foundation is a box-typed .structure which consists of the bottom plate .top plate,outside wall and inside longitudinal and lateral walls ,and by which the upper loadings arc distributed to the piles. The paper proposes the analysis on the pile-box structure, as well as its calculating methods.