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.
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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