人工挖孔扩底灌注桩承载力高,在武汉高层建筑中被广泛采用。但在以老粘性土为持力层的人工挖孔扩底灌注桩中,常常由于存在质量问题,导致实测极限承载力不及设计值的一半。本文分析了人工挖孔扩底灌注桩产生质量问题的主要原因,并针对典型的质量问题,提出了有效的预防措施,来保证桩的质量;同时通过选定合适的检测方法,以确保桩检结果的准确性。 The artificial digging hole expanded bottom pile has high bearing capacity and is widely used in high-rise buildings in Wuhan. However, in artificial digging and expanding bored pile with old cohesive soil, the ultimate bearing capacity is often less than half of the designed value due to the quality problems. In this paper, the main reasons for the quality problems of artificial digging hole enlarged bottom bored pile are analyzed, and for the typical quality problems, effective preventive measures are put forward to ensure the quality of the pile. At the same time, by selecting the appropriate testing method, The accuracy of the results.