灌注桩导管爆管与瘪管的原因分析

Cause Analysis on Tube Rupture and Collapse of Tremie in Bored Pile

水下混凝土灌注是钻孔灌注桩施工中最关键工序之一,超深孔水下混凝土灌注的导管偶尔会出现爆管与瘪管现象。通过对导管受力分析,从理论上分析了造成爆管和瘪管现象的直接原因,从实践中罗列出可能导致爆管与瘪管的各种因素,并提出预防措施,有利于超深孔水下混凝土灌注质量的控制。

Underwater concrete injection is the most important process in the construction of bored pile. There will be the phenomenon of tube rupture or collapse sometimes for the tremie in underwater concrete injection in ultra-deep hole. The direct reason why the phenomenon would happen was theoretically analyzed through stress analysis. Various factors which may cause tube rupture and collapse were listed based on the practice, and the corresponding preventive measures were put forward, which may be beneficial to the quality management of underwater concrete injection in ultra-deep hole.