泥浆护壁成孔灌注桩混凝土运动过程分析与施工中的问题

Analysis on Concrete Movement of Mud Wall Holing Pouring Pipe and Problems in Construction

通过理论分析、对比观察、工程实例研究,得出桩基水下灌注时混凝土的三种不同运动过程,对常见的断桩、缩径(漏筋)、钢筋笼上浮等桩基质量事故的原因提出了一种全新的解释,并在施工实践中总结出一种导管浅埋推挤法来控制桩基质量事故的发生,取得了良好的效果。

Three underwater pipe pouring movement processes were concluded, accoding to theoretical analysis, comparison, engineering practice and 20 years＇ pipe pouring experience. Different views were given to the causes of common quality accidents. And a method of shallow burying pipe was put forward to avoid engineering accident.