期刊论文

Zhang, L

英文

Measurement Science And Technology

0957-0233

2024

35

4

10.1088/1361-6501/ad1806

National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809 [52308399]; National Natural Science Foundation of China [2020JJ5588]; Natural Science Foundation of Hunan Province in China [22A0562, 23C0664]; Research Foundation of Education Bureau of Hunan Province, China [202319]; Hunan Provincial Department of Transportation Science and Technology Progress and Innovation Project [TUC2022-02]; Open Fund of Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University

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The hard rocks in the stratum can pose safety risks and hinder the progress of urban underground tunnel construction using shield and jacking methods, thereby reducing construction efficiency and increasing construction costs. This paper utilizes wavelet scale energy spectrum, wavelet packet theory and statistical methods to conduct research on the detection of special geological formations such as hard rocks and voids, as well as the analysis of their signal time-frequency characteristics based on the ground-penetrating radar (GPR) technique. On the basis of calibrating the permittivity of di...