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本文根据 ＰＩＴ的工作原理，结合我国公路现场桩基检测的工程实践，对桩身中应力波的传播、波速和桩长的计算，测试结果的分析与处理进行了探讨。在此基础上，对ＰＩＴ反射波法进行桩身结构完整性测试的波形判读中的有关问题进行了讨论，以供桩基检测技术人员参考。
Based on the working principle of PIT and the engineering practice of pile foundation testing in highway, the paper analyzes the propagation of stress wave, the calculation of wave velocity and length of pile, the analysis and treatment of test results. On this basis, the paper discusses the problems in waveform interpretation of pile structure integrity test by PIT reflection wave method for the reference of pile foundation testing technicians.