张星宇
    (机械部第二设计研究院  杭州 310022)

[提要]  某工程桩基采用大直径超长钻孔灌注桩，桩直径为800 ~1  200mm，桩长45.0~100.2m不等，取得了较好的经济效益和实用效果，为今后超长桩的应用提供了一些参考经验。
[关键词]  超长桩  桩顶沉降  桩身压缩

The large-diameter-over-long bored and grouted pile, with diameter 800～1 200mm, and  length 45.0～100.2m, is used in a building. It achieves good economic returns and practical effectiveness, affords some valuable experience about the application of the over-long pile in future.
Keywords: over-Iong pile; pile top settlement; pile body compression