声波层析成像(CT)技术相比于常规测试手段,在不破坏混凝土结构的情况下,能够对混凝土内部质量状况进行更加准确直观的反映,但目前声波CT在进行现场数据采集时,主要为单击单收模式,检测效率较低。本文在传统声波CT探测技术的基础上,对现场数据采集进行了改进以期实现对混凝土构件进行快速检测的目的。本文所做工作中其一是使用单击多收模式采集数据改进采集方法;其二是利用数值模拟方法,对改进方法有效性进行了;其三是将该技术分别在物理模型和实际隧道仰拱混凝土内部缺陷的探测中进行了应用;最后在实际仰隧道拱检测中采用取芯对声波快捷层析成像的检测结果进行了验证。本文的实验结果表明,声波快捷层析成像技术对混凝土内部缺陷的检测具有高效、无损、高分辨率等特点,在隧道检测方面具有良好的应用前景。
Compared to conventional testing methods, sonic tomography (CT) technology provides a more accurate and intuitive reflection of the internal quality of concrete structures without causing any damage. However, the current use of sonic CT for on-site data collection primarily relies on a single-shot single-receive mode, resulting in low detection efficiency. This paper aims to improve on-site data collection based on traditional sonic CT detection technology to achieve rapid detection of concrete components. Firstly, numerical simulation methods were used to verify the effectiveness of the improvements. Then, the improved technology was applied to both physical models and the detection of internal defects in the concrete invert of an actual tunnel. The results of the rapid sonic tomography were validated against core samples taken from the actual tunnel invert. The findings indicate that the rapid sonic tomography technology is efficient, non-destructive, and provides high-resolution detection of internal defects in concrete, showing great potential for practical applications.