The Application Research Of Ground-Penetrating Radar In Tunnel Construction Quality Testing

Ground-Penetrating Radar (GPR) is a nondestructive detection technology with the development of the high-frequency electromagnetic wave and signal processing technology. GPR has the following advantages in nondestructive detection of Tunnel Engineering Quality: convenient operation、high efficiency to detection%detection for large area、continuity、 repeatability and intuitive image display,etc. But development and application of GPR is not too long,there are some problems in the actual detection, such as detection error、interpretive precision of image. These problems to a certain extent affect the accuracy of GPR.This article firstly introduction the application of GPR in nondestructive detection.The development and content of GPR in nondestructive detection. Basic composition of tunnel’s quality、concept of quality of the tunnel detection and frequently-used means of detection. And the principle f GPR in quality of the tunnel detection.Due to many factors in tunnel detection disturb the corrective judgment of its results, corresponding solutions are put forward and verified in detection of Xing Fen tunnel and Shan Xi Yang Quan outer ring tunnel.what’s more, in order to solve the universal problems in quality detection of tunnel lining such as empty hole、 less empty、no dense、insufficient thickness and over distance of steel etc, LTD Ground-Penetrating radar is used for the on-site detection and analysis of disease image.After the tunnel disease disposed, GPR is reused to check to explain the differences between the former image and the latter one.Based on the theory and combined with the practice of the tunnel’s quality detection, this paper has summed up the related issues. And through analysis of its errors, it can make the detection be more precise and accurate, as well as proper interpretation of tunnel’s defect image, which is of realistic significance to apply Ground-Penetrating radar in quality detection.