在对目前较常用的两种双排桩计算模型及其受力机理分析与探讨的基础上 ,提出了以后排桩桩后土体作为研究对象的新的计算方法。认为双排桩桩间土体对支护桩作用较小 ,土压力以后排桩桩后土压力为主 ,双排桩可视为受水平力的刚架 ,后排桩的存在改变了土体剪切破裂面。最后对土体剪切破裂角的计算进行了推导。 Based on the analysis and discussion of two commonly used two-row pile calculation models and their stress mechanism, a new calculation method of the soil after the row pile is proposed is put forward. It is considered that the soil between the two rows of piles has a small effect on the supporting piles. The earth pressure behind the piles is mainly due to the earth pressure. The double-row piles can be considered as the rigid frame subjected to the horizontal force. The presence of the rear piles changes the soil Shear rupture surface. Finally, the calculation of soil shear fracture angle is deduced.