地质雷达技术在地下工程检测中的应用
发布时间：2018-09-12 19:55
【摘要】：随着我国交通事业的快速发展,地质雷达在铁路、公路隧道质量健康检测及其它工程检测中获得了广泛的应用,作为一种高效、先进的无损检测方法,地质雷达法能够对隧道衬砌连续扫描,获得形象直观的探测图像。然而在实际工程中的应用还存在许多问题,例如地质雷达的探测精度,地质雷达图像的辨识依据等。需要不断的探索与研究。本文从地质雷达的工作原理出发,根据雷达电磁波的传播特性,即在不同介质的界面发生反射并伴随异常的这一特点,运用了水槽模型试验探索雷达波起跳点的位置以及钢筋位置在雷达波图像上的表现形式,从而为界面的确定提供了试验依据；通过隧道衬砌模型试验研究总结了隧道衬砌各种特征的雷达图像表现形式,特别对隧道衬砌中单双层钢筋的识别、钢筋混凝土背后拱架的识别、不同形式脱空的识别等进行了试验研究,试验结论对工程检测具有重要的指导意义。结合具体工程,介绍了地质雷达在实际工程中的应用,同时验证了试验结果,找出了试验与实际工程的不同之处,为今后进一步研究试验提供了依据。
[Abstract]:With the rapid development of transportation in China, GPR has been widely used in railway, highway tunnel quality and health detection and other engineering testing, as an efficient and advanced nondestructive testing method. The geological radar method can scan the tunnel lining continuously and obtain the visual detection image. However, there are still many problems in practical engineering, such as the detection accuracy of GPR, the identification basis of GPR image and so on. Need constant exploration and research. Based on the working principle of GPR, according to the characteristics of radar electromagnetic wave propagation, that is to say, the reflection occurs at the interface of different media and is accompanied by anomaly, The location of the take-off point of radar wave and the representation form of steel bar position on radar wave image are explored by using flume model test, which provides the experimental basis for the determination of interface. Through tunnel lining model test, the radar image representation of tunnel lining characteristics is summarized, especially the recognition of single and double reinforcement in tunnel lining, and the recognition of arch frame behind reinforced concrete. Experiments on different forms of void identification are carried out, and the experimental results are of great significance for engineering detection. The application of GPR in practical engineering is introduced, the test results are verified, and the differences between the test and the actual engineering are found out, which provides the basis for further study and test in the future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U456.3
本文编号：2240067
[Abstract]:With the rapid development of transportation in China, GPR has been widely used in railway, highway tunnel quality and health detection and other engineering testing, as an efficient and advanced nondestructive testing method. The geological radar method can scan the tunnel lining continuously and obtain the visual detection image. However, there are still many problems in practical engineering, such as the detection accuracy of GPR, the identification basis of GPR image and so on. Need constant exploration and research. Based on the working principle of GPR, according to the characteristics of radar electromagnetic wave propagation, that is to say, the reflection occurs at the interface of different media and is accompanied by anomaly, The location of the take-off point of radar wave and the representation form of steel bar position on radar wave image are explored by using flume model test, which provides the experimental basis for the determination of interface. Through tunnel lining model test, the radar image representation of tunnel lining characteristics is summarized, especially the recognition of single and double reinforcement in tunnel lining, and the recognition of arch frame behind reinforced concrete. Experiments on different forms of void identification are carried out, and the experimental results are of great significance for engineering detection. The application of GPR in practical engineering is introduced, the test results are verified, and the differences between the test and the actual engineering are found out, which provides the basis for further study and test in the future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U456.3
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