后压浆大直径超长钻孔灌注桩试桩工艺

Pile Testing Process of Large Diameter and Super Long Bored Pile with Post Grouting Technique

以天津某超高层工程为例,介绍了大直径超长钻孔灌注桩试桩方法和工艺,包括试桩成孔工艺、灌注桩施工工艺和试桩工艺。主要介绍了成孔施工过程的要求,双护筒的设计与施工,反力系统的设计与制作,监测系统设置以及加载方式等。

Based on an engineering practice in Tianjin, this paper introduced testing pile process and methods of the large and super-long bored pile, such as testing pile process, pile-forming and testing. The requirement in pore-forming construction, design and construction of double protecting sleeve, reaction system design, monitoring system setting and loading mode were introduced in detail.