本文讨论了声波各项指标在基桩测试中的应用，分析了原有规范在基桩超声波测试评定中的不足之处，提出了解决的办法。
In the paper, the parameters of ultrasonic are discussed in the pile testing, the lack of previous criterion in the determinant method of ultrasonic are pointed out.
采用双速度测试和分析技术可以解决在既有基础下基桩的完整性、平均波速以及从实测信号中分离出上行波曲线。
Two-velocity analysis method can develop the pile integrity test, average wave speed and wave-up curve separated from measured signal under the condition of existed foundation.
磁梯度探测方法可以高效、高精度探测具有铁磁性的地下障碍物深度，因此在工程基桩长度测试中有良好的效果。
The magnetism gradient test is a highly effective and high accuracy method which used to detect the depth of ferromagnetic obstacle under ground, and it is very suitable to detect the length of pile.
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