钻孔灌注桩缺陷声波动态响应特征分析与研究

声波透射法是一种有效的桩基质量检测方法，但检测时存在盲区，易出现漏检现象，且对声波信号进行解释时，存在主观性、随意性较大等问题。基于声波透射法原理，采取有效方法减小检测盲区，对含有不同浅部缺陷的模型桩进行检测，获得声波时域信号。同时，利用快速傅立叶变换（FFT）对测试结果进行频谱分析，获得声波信号频域特征。

Analysis and Study of Acoustic Dynamic Response Characteristics of Bored Pile Defects

Acoustic transmission is an effective method to test the quality of pile foundation, however, the non-detection zone existed therein may lead to omission easily and, there may have subjectivity and arbitrariness in explanation of acoustic signals. Depending on the principle of acoustic transmission, with the non-detection zone reduced by effective methods, the model pile with different shallow defects was detected to obtain the time-domain acoustic signals; meanwhile, Fast Fourier transformation (FFT) was used to carry out spectrum analysis on the testing result to obtain the frequency-domain characteristics of acoustic signals.