张学文　（上海市建筑科学研究院　200032）

[提要]  以某实际工程为背景，介绍在用PIT进行常规的低应变检测后，发现较高比例的桩在接头位置都存在缺陷，通过进一步用PDA打桩分析仪进行测试，并结合相关资料进行综合分析，对桩的缺陷性质做出了正确判别，由此杜绝了工程隐患。
[关键词]  预制方桩  检测  波形曲线  PIT PDA沉降

Grounded on an actual project of pile testing, defects are found in relatively high ratio test piles at joints based on PIT test results. By using pile-driving analyzer for further testing on these defective piles and analyzing all these test results comprehensively with other relative materials, we can ascertain the properties of defects of these test piles correctly and avoid potential engineering trouble.
Keywords:  precast concrete square pile; test curves; PIT; PDA; settlement

　　参　考　文　献

1. PDA-W Users Manual.  Pile Dynamics,  Inc. ,2001,7.
2. Webster S D, Teferra W. Pile damage assessments using the pile driving analyzer. Stress wave ' 96 Conference, Orlando, FL, 1996 .