对北京某超高层大楼桩基施工进行了研究，通过分析施工中的重点与难点，总结了钻孔灌注桩试验桩成孔、双套筒加工及安装、后注浆等关键施工技术工艺，可为类似工程提供参考。%A super-high building pile foundation construction of Beijing was studied, through the analysis on key points and difficulties in con-struction, and summarizes the drilling filling pile test pile pore forming, double sleeve machining and installation and post-grouting and other key construction techniques, can provide a reference for similar projects.
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