The applications of impact-echo method on nondestructive testing for concrete structures are researched in this paper.
本文针对冲击回波法在混凝土无损检测中的应用展开研究。
The measuring results in field show that the impact-echo method is effective in measuring the depth of surface-opening crack.
现场测试表明，该方法对开口裂缝深度的测试是相当有效的。
The traditional non-destructive method of pipe piles and concrete plates is impact-echo technique based on one-dimensional stress wave theory, and it can detect the big defects.
对管桩和混凝土板的传统无损检测方法则是基于一维波动理论的冲击回波方法，这种方法只能检测比较大的缺陷。
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