阐述了后注浆工艺提高承载力的机理 ,根据钻孔桩后注浆工程的施工经验 ,建立了单桩承载力理论计算经验模式 ,并通过实例验证表明 ,该经验模式可满足承载力理论计算要求 ,使钻孔桩后注浆工艺中单桩承载力的计算有据可依 ,具有一定的实用价值 . The mechanism of post-grouting technology to increase bearing capacity is expounded. According to the construction experience of the post-grouting project, a theoretical calculation empirical mode of single pile bearing capacity is established. The empirical results show that the empirical mode can meet the theoretical calculation of bearing capacity Requirements, so that the post-drilling grouting pile bearing capacity calculation is evidence-based, has a certain practical value.