冲击钻孔灌注桩施工要点及问题处理

Key Construction Technology and Problem Treatment on Impact Bored Pile

根据当地地质情况,采用上部无水地带人工挖孔,下部富水地带机械成孔相结合的施工方案,既避免了全部用人工挖孔无法全部挖到位、危险性大的短处,又避免了全部用机械成孔速度慢、成本高的缺点,明显提高了工程进度,并大幅降低了工程成本。

Based on cast-in-place geological condition,composite method of manual hole digging in upper site with no water and machine hole digging in bottom site with rich water is adopted,which has some advantages such as improving engineering progress,reducing engineering cost.Digging hole with manual cannot dig the pile to bottom and it is very dangerous,and digging whole hole with machine is very slow and high cost.This composite method can avoid these disadvantages.