弹性波CT在混凝土防渗墙无损检测中的应用

Application of elastic wave CT in nondestructive testing of concrete cutoff wall

弹性波CT是对混凝土桩基等岩土工程进行无损检测的重要技术方法。为实现某水库大坝混凝土防渗墙岩体的质量检测,采用弹性波CT技术对坝基进行检测。在对检测得到的原始波形进行校正处理后,采用反投影算法(BPT)进行迭代计算,反演得到其波速分布特征。综合工程现场实际情况表明,该防渗墙整体完整、连续均匀,达到了工程验收标准。本次防渗墙弹性波CT检测为同类工程检测提供了参考价值,具有一定借鉴意义。

Elastic wave CT is an important technique for nondestructive testing of geotechnical engineering such as concrete pile foundation.In order to detect the quality of concrete impervious wall rock mass of a reservoir dam,elastic wave CT technology is used to detect the dam foundation.After the original waveform is corrected,the back projection algorithm(BPT) is used for iterative calculation,and the characteristics of wave velocity distribution are inverted.The results show that the cutoff wall is complete,continuous and uniform,and meets the project acceptance standard.The elastic wave CT detection of cut-off wall provides reference value for similar engineering detection.It has certain reference significance.