根据西宁地区泥岩地基中3根大直径钻孔灌注桩的竖向抗压静载试验，通过对基桩的承载力特性、桩身轴力传递以及桩侧和桩端土阻力发挥性状的测试分析，结合施工工艺以及施工过程中出现的异常现象，研究了钻成孔对桩侧阻力和桩身轴力传递的影响、泥浆循环方式对桩端阻力的影响以及混凝土灌注的连续性对桩承载力的影响，得出了一些对相同地区同类基桩的设计、施工具有指导意义的结论

Through the vertical static loading test of 3-large-diameter borehole cast-in-place piles in muddy rock foundation in Xining city, pile bearing properties, pile axis pressure transmission and pile side and tip resistance are studied, various construction factors such as slurry recycling mode and the continuity of concrete placement that influence the pile engineering properties are analyzed. And some instructive conclusions for design, construction and further study of same piles in same regions are provided.