大直径超长钻孔灌注桩成孔施工质量控制

Study on construction quality control of large diameter and super long bored pile

从泥浆制备、护筒内钻进、护筒外非岩层钻进、护筒外岩层钻进等方面分析了桩基成孔过程,提出了大直径超长钻孔钻孔施工质量控制措施。

The drilling process of pile foundation is analyzed from the aspects of mud preparation, drilling inside the pile casing, drilling outside the pile casing in non rock strata and drilling outside the pile casing. The construction quality control measures of large diameter and ultra long drilling are put forward.