This matrix could be used to analyze both displacement and shear force along the depth of piles in long-short pile group without discretization of the soil or piles.

• 应用该方法时,桩体不需要划分单元,而且对于不同长度的桩组成的群桩基础具有分析过程的不变性和最终刚度矩阵大小的不变性。