1 灌注桩发生质量缺陷的原因灌注混凝土时,导管被提出了混凝土面,或导管灌注混凝土过程中脱落,造成断桩;在进行人工挖孔桩过程中,地下水丰富而未采取有效的水下混凝土灌注施工工艺,孔底沉渣太厚;混凝土搅拌时间极短等原因都会造成一些质量缺陷。2 诊断处理缺陷桩的方法2.1 综合分析资料,初步诊断在充分分析静力荷载试验、高(低)应变试验、工程地质勘 1, the reasons for the quality defects of cast-in-situ concrete piles, the catheter was proposed concrete surface, or catheter pouring concrete fall off during the process, resulting in broken pile; in the process of manual digging piles, rich in groundwater without taking effective underwater concrete Pouring construction process, the hole bottom sediment is too thick; concrete mixing time is very short and other reasons will cause some quality defects. 2 Diagnosis Defective pile method 2.1 Comprehensive analysis of data, preliminary diagnosis Before fully analyzing the static load test, high (low) strain test, engineering geological survey