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Application of Ground Penetrating Radar in Tunnel Engineering Inspection
Geological radar is currently the main equipment used for detection in various tunnel projects in China. Therefore, the specific working principle and mode of geological radar are analyzed, and the specific application forms of geological radar are discussed. Based on the analysis of specific cases, the role and application of geological radar are further understood, and the conclusion is drawn that geological radar can measure the concrete thickness Accurately detect the degree of cementation and the use of steel bars, and conduct scientific testing while ensuring the integrity of the concrete structure of the tunnel project.
Keywords: tunnel engineering; Ground penetrating radar; Engineering inspection
1. Working principle of geological radar
Ground penetrating radar (GPR) is an important equipment that uses electromagnetic wave emission and refraction to detect and observe underground electrical interfaces. When detecting the underground, ground penetrating radar (GPR) emits high-frequency electromagnetic waves to explore the surrounding environment. Due to the different cross-sections of rocks and soil in the underground, as well as the ability to refract electromagnetic waves, the frequency of the reflected electromagnetic waves varies in different geological conditions. Through the analysis and calculation of relevant data such as the reflected electromagnetic waves, the electromagnetic waves emitted by GPR, and the reflected time, Obtain underground survey data through final processing. Then, using the results of geological radar detection combined with the geological conditions of the construction site and relevant geological exploration data, the final judgment is made on the underground geological situation, spatial location, internal environment, and structure.
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