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根据建筑物地基的层位关系、土性和力学特征暨上部建筑的结构受力特点，并考虑了造价和施工方法，在对大直径冲击钻孔施工和其它方法进行了分析对比的基础上，论述了选择大直径冲孔灌注桩方案的依据及该类典型摩擦端承桩的设计计算方法。
According to the location relationship, soil properties and mechanical characteristics of the building foundation and structural structural characteristics of the upper building, and considering the construction cost and construction method, based on the analysis and comparison of large-diameter impact drilling and other methods, The basis of selecting the large-diameter punching and pouring piles and the design and calculation method of the typical friction end-bearing piles are discussed.