Abstract
Correctly locating the tunnel lining cavity is extremely important tunnel quality inspection. High-accuracy imaging results are hard to obtain because conventional one-way wave migration is greatly affected by lateral velocity change and inclination limitation and because the diffracted wave cannot be accurately returned to the real spatial position of the lining cavity. This paper presents a tunnel lining cavity imaging method based on the ground-penetrating radar (GPR) reverse-time migration (RTM) algorithm. The principle of GPR RTM is described in detail using the electromagnetic wave equation. The finite-difference timedomain method is employed to calculate the backward extrapolation electromagnetic fields, and the zero-time imaging condition based on the exploding-reflector concept is used to obtain the RTM results. On this basis, the GPR RTM program is compiled and applied to the simulated and observed GPR data of a typical tunnel lining cavity GPR model and a physical lining cavity model. Comparison of RTM and Kirchhoff migration results reveals that the RTM can better converge the diffracted waves of steel bar and cavity to their true position and have higher resolution and better suppress the effect of multiple interference and clutter scattering waves. In addition, comparison of RTM results of different degrees of noise shows that RTM has strong anti-interference ability and can be used for the accurate interpretation of radar profile in a strong interference environment.
Similar content being viewed by others
References
Bradford, J. H., 2015, Reverse-time prestack depth migration of GPR data from topography for amplitude reconstruction in complex environments: Journal of Earth Science, 26(6), 791–798.
Chattopadhyay, S., and McMechan, G. A., 2008, Imaging conditions for prestack reverse-time migration: Geophysics, 73(3), S81–S89.
Claerbout, J. F., 1971, Toward a unified theory of reflector mapping: Geophysics, 36(3), 467–481.
Cui, F., Li, S., Yuan, J. X., et al., 2020, GPR based RTM imaging technology for estimating rhizome diameters and application in the western China mining area: Applied Geophysics, 17(1), 154–166.
Deng, X. S., Du, T., Yuan, Q., et al., 2015, Tunnel lining thickness and voids detection by GPR: Electronic Journal of Geotechnical Engineering, 20(7), 2019–2030.
Di, Q. Y., and Wang, M. Y., 2004, Migration of ground-penetrating radar data with a finite element method that includes attenuation and dispersion: Geophysics, 69(2), 472–477.
Feng, D. S., and Dai, Q. W., 2009, Ground penetrating radar reverse time migration processing based on multi-resolution of wavelet: Journal of Tongji University (Natural Science) (in Chinese), 37(4), 560–564.
Feng, D.S., Zhang, H., and Wang, X., 2020, Second-generation wavelet finite element based on the lifting scheme for GPR simulation: Applied Geophysics, 17(1), 143–153.
Fisher, E., Mcmechan, G. A., Annan, A. P., et al., 1992, Examples of reverse-time migration of single-channel, ground-penetrating radar profiles: Geophysics, 57(4), 577–586.
Giannopoulos, A., 2005, Modelling ground penetrating radar by GprMax: Construction and Building Materials, 19(10), 755–762.
Kang, F. Z., Qi, F. L., He, S. H., et al., 2010, Application of ground penetrating radar to disease detection of Kunlun mountain tunnel: Chinese Journal of Rock Mechanics and Engineering (in Chinese), 29(S2), 3641–3646.
Karlovsek, J., Scheuermann, A., and Willimas, D. J., 2012, Investigation of voids and cavities in bored tunnels using GPR: Proceeding of 14th International Conference on Ground Penetrating Radar (GPR), 496–501.
Lai, W. W. L., Derobert, X., and Annan, P., 2018, A review of Ground Penetrating Radar application in civil engineering: A 30-year journey from Locating and Testing to Imaging and Diagnosis: NDT & E International, 96: 58–78.
Lei, L. L., Liu, S. X., Fu, L., et al., 2015, Reverse time migration applied to GPR data based on full wave inversion: Chinese Journal of Geophysics (in Chinese), 58(9), 3346–3355.
Liu, Q. H., 1997, The PSTD algorithm: A time-domain method requiring only two cells per wavelength: Microwave and Optical Technology Letters, 15(3), 158–165.
Prego, F. J., Solla, M., Núñez-Nieto, X., et al., 2016, Assessing the applicability of ground-penetrating radar to quality control in tunneling construction: Journal of Construction Engineering and Management, 142(5), 06015006.
Shen, B., Sun, Z. L., and Qu, X. L., 1994, A study of wave equation theory for ground penetrating radar and forward modelling: Journal of Southeast University (in Chinese), 24(2), 114–117.
Shu, L. Z., Liu, X. R., Liu, B. X., et al., 2013, GPR three-dimensional forward modeling of defects in tunnel lining and engineering verification: China Railway Science (in Chinese), 34(4), 46–53.
Wang, H. H., Lv, Y. Z., Wang, M. L., et al., 2019, A perfectly matched layer for second order electromagnetic wave simulation of GPR by finite element time domain method: Chinese J. Geophys (in Chinese), 62(5), 1929–1941.
Wu, B. H., Bai, X. B., and Kong, X. C., 2008, Application of ground penetrating radar in tunnel liner quality detection: Geophysical and Geochemical exploration (in Chinese), 32(2), 229–231.
Wu, F. S., and Hua, X. M., 2017, Study of High precision forward recognition of cavities behind tunnel lining based on ground penetrating radar: Tunnel Construction (in Chinese), 37(S1), 13–19.
Xiang, L., Zhou, H., Shu, Z., et al., 2013, GPR evaluation of the Damaoshan highway tunnel: A case study: NDT & E International, 59, 68–76.
Xue, G. X., Deng, S. K., and Liu, X. J., 2004, An application of reverse-time migration in the ground-penetrating radar data processing: Coal Geology & Exploration (in Chinese), 32(1), 55–57.
Zhang, F. S., Xie, X. Y., and Huang, H. W., 2010, Application of ground penetrating radar in grouting evaluation for shield tunnel construction: Tunnelling and Underground Space Technology, 25(2), 99–107.
Zhong, S. H., and Wang, R., 2002, Some problems concerning the application of ground penetrating radar to the inspection of tunnel lining: Geophysical and Geochemical Exploration (in Chinese), 26(5), 403–406.
Zhu, W. Q., Huang, Q. H., Liu, L. B., 2020, Three-dimensional reverse time migration of Ground-Penetrating signals: Pure and Applied Geophysics, 177(2), 853–865.
Acknowledgments
The research work was supported by the National Natural Science Foundation of China (Nos. 41764005, 41604039, 41604102, and 41574078), Guangxi Natural Science Foundation of China (Nos. 2016GXNSFBA380082 and 2016GXNSFBA380215), Guangxi Young and Middle-aged Teacher Basic Ability Improvement Project (No. KY2016YB199), Guangxi Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials Project (No. GXYSXTZX2017-II-5), and Guangxi Scholarship Fund of Guangxi Education Department.
Author information
Authors and Affiliations
Corresponding author
Additional information
Lv Yuzeng graduated with a PhD from the Institute of Applied Geophysics, Central South University, in 2008. He is now an Associate Professor at the College of Earth Sciences, Guilin University of Technology. His research interest is electromagnetic numerical simulation and inversion imaging. Email: Lyz@glut.edu.cn
Rights and permissions
About this article
Cite this article
Lv, Yz., Wang, Hh. & Gong, Jb. Application of GPR reverse time migration in tunnel lining cavity imaging. Appl. Geophys. 17, 277–284 (2020). https://doi.org/10.1007/s11770-020-0815-9
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11770-020-0815-9