在基础施工过程中 ,由于不能严格执行规程、规范等原因 ,使灌注桩存在断桩、桩身混凝土严重离析、混凝土疏松、桩底沉渣厚等严重质量缺陷 ,影响了桩的使用价值。通常使用补桩的方法弥补上述缺陷 ,但补桩不仅大幅度增加造价 ,而且桥桩、群桩等工程无补桩空间 ,补桩工作无法实施 In the process of foundation construction, serious defects such as broken pile, serious segregation of concrete, loose concrete and thick sediment bottom affect the value of pile due to the failure to strictly enforce rules and regulations. Often use the method of making up the pile to make up for the above defects, but make up pile not only greatly increase the cost, and bridge piles, group pile and other projects do not make up the pile space, pile up work can not be implemented