基于压电陶瓷的灌浆套筒内壁锈蚀监测研究

为了识别灌浆套筒内壁因氯离子侵蚀后达到的不同锈蚀程度,首先,通过加速锈蚀的相关理论方法推导了套筒内壁达到不同锈蚀率所需要的时长;然后,采用电化学法对套筒内壁进行加速锈蚀,并使用锈蚀监测系统对5组不同锈蚀工况下的试件进行监测,获得各试件在不同激励频率下的时域信号;最后,通过信号峰-峰值和小波包能量值对时域信号进行分析,提出了两种不同的锈蚀指标。结果表明,基于信号峰-峰值和小波包能量的两种锈蚀指标均能够有效、合理地评估灌浆套筒内壁的锈蚀状态,为套筒内壁的锈蚀监测方法提供参考。

Research on Corrosion Monitoring of Grouting Sleeve Based on Piezoelectric Ceramics

In order to identify the different degrees of corrosion on the inner wall of the grouting sleeve due to chloride ion erosion, firstly, the time required for the inner wall of the sleeve to reach different corrosion rates is deduced by the relevant theoretical methods of accelerated corrosion. Then, an electrochemical method is used to monitor 5 groups of test pieces under different corrosion conditions, and the time domain signals of each test piece under different excitation frequencies are obtained. Finally, the time domain signals are analyzed by the signal peak peak value and wavelet packet energy value, and two different corrosion indicators are proposed. The results show that the two corrosion indicators based on signal peak to peak value and wavelet packet energy can effectively and reasonably evaluate the corrosion status of the inner wall of the grouting sleeves, which provides a reference for the corrosion monitoring method of the inner wall of the sleeve.