基于建筑桩基检测技术对超深混凝土灌注桩移除研究

Research on Removal of Ultra Deep Concrete Cast-in-place Piles based on Building Pile Foundation Detection Technology

为了提高缺陷超深混凝土灌注桩拔桩的完整,避免在拔除灌注桩后对主体结构产生影响,本文在分析灌注桩拔桩难点、总结灌注桩拔桩中途常见问题的基础上制定完整的拔桩工艺流程,提出超声波检测桩身完整、计算桩体极限侧阻、选择创新拔桩设备、实施拔桩、移除后桩孔回填等方法,希望能与同行工作者共同探讨、交流。

In order to improve the integrity of the pile pulling process for ultra deep concrete cast-in-place piles with defects and avoid the impact on the main structure after pulling out the cast-in-place piles,this article analyzes the difficulties of pile pulling and summarizes the common problems during the pile pulling process.Based on this,a complete pile pulling process is developed,and methods such as ultrasonic testing of pile integrity,calculation of pile ultimate lateral resistance,selection of innovative pile pulling equipment,implementation of pile pulling,and backfilling of pile holes after removal are proposed,which could provide discussion and exchange for peers.