Application of the ground penetrating radar (GPR) method in the detection of underground utilities above the Kobilja Glava Tunnel
DOI:
https://doi.org/10.7494/geol.2026.52.1.53Keywords:
GPR-GNSS integration, sewer pipeline detection, electromagnetic wave velocity, hyperbolic reflections, tunnel zoneAbstract
Accurate detection and mapping of underground utilities in complex urban environments, particularly in intensive construction zones such as tunnel sites, presents a significant engineering challenge. This paper investigates the application of ground penetrating radar (GPR) integrated with high-accuracy real-time kinematic (RTK) GNSS positioning to identify and spatially define a damaged sewer pipeline above the Kobilja Glava tunnel construction site in Sarajevo, Bosnia and Herzegovina. Non-destructive investigation was required due to the lack of reliable underground utility documentation and wastewater ingress into the tunnel during construction. The study was conducted under complex urban and geotechnical conditions, including asphalt pavement, high soil moisture, heterogeneous subsurface layers, and proximity to the tunnel. GPR surveys were performed using a dual- channel Leica DS2000 system with 250 MHz and 700 MHz antennas, combining grid-based and free-profile measurements. Spatial georeferencing was achieved with a Topcon Hiper HR RTK GNSS receiver, which provides centimeter-level positioning of identified reflectors within the national coordinate system of Bosnia and Herzegovina. Data processing and interpretation followed standard GPR procedures. Results show that the sewer pipeline was reliably identified through hyperbolic reflections, with the depth of the pipe crown ranging from 1.1 to 1.7 m. Integration of GPR and GNSS data enabled precise reconstruction of the pipeline’s position and depth, supporting the design of a new pipeline and reducing construction risks. The study demonstrates the high effectiveness of the integrated GPR-GNSS approach in complex urban environments near tunnel structures. These findings suggest that the integration of GPR and GNSS technologies serves not only for object detection but also provides a critical methodological framework for real-time risk assessment during underground construction. The study demonstrates how precise spatial definition of damaged infrastructure can prevent broader geotechnical instabilities, elevating the work from a local case study to a universal model for monitoring urban infrastructure under stress.
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References
Al-Nuaimy W., Huang Y., Nakhkash M., Fang M.T.C., Nguyen V.T. & Eriksen A., 2000. Automatic detection of buried utilities and solid objects with ground-penetrating radar using neural networks and pattern recognition. Journal of Applied Geophysics, 43(2–4), 157–165. https://doi.org/10.1016/S0926-9851(99)00055-5.
Al-Qadi I. & Lahouar S., 2005. Measuring layer thicknesses with GPR – theory to practice. Construction and Building Materials, 19(10), 763–772. https://doi.org/10.1016/j.conbuildmat.2005.06.005.
Annan A.P., 2005. GPR methods for hydrogeological studies. [in:] Rubin Y. & Hubbard S.S. (eds.), Hydrogeophysics, Water Science and Technology Library, 50, Springer, Dordrecht, 185–213. https://doi.org/10.1007/1-4020-3102-5_7.
Bakir H.B., 2017. Assessment of vertical and horizontal ground penetrating radar resolution for typical models of different targets. University of Baghdad, College of Science, Department of Geology, Baghdad 2017 [PhD thesis]. https://doi.org/10.13140/RG.2.2.18658.73927.
Barzaghi R., Cazzaniga N.E., Pagliari D. & Pinto L., 2016. Vision-based georeferencing of GPR in urban areas. Sensors, 16(1), 132. https://doi.org/10.3390/s16010132.
Bektašević E., Filipović S., Gutić K. & Musa N., 2024. Defining the optimal distance between technological sequences during tunnel excavation in poor rock mass. e-Zbornik: Electronic Collection of Papers, Faculty of Civil Engineering, University of Mostar, 14(28), 45–55. https://doi.org/10.47960/2232-9080.2024.28.14.47.
Bektašević E., Filipović S., Gutić K., Hodžić D. & Musa N., 2025a. Analysis of surface deformations during excavation of a small overburden tunnel in weak rock masses. Journal of the Faculty of Civil Engineering and Architecture, 40(1), 35–48. https://doi.org/10.62683/ZRGAF40.3.
Bektašević E., Filipović S., Crnogorac L., Gutić K., Požegić Z. & Tokalić R., 2025b. Challenges of tunnel support in low overburden zones in urban areas – case study. Applied Sciences, 15(22), 12094. https://doi.org/10.3390/app152212094.
Bektašević E., Filipović S., Hurlov E. & Gutić K., 2025c. Application of a non-destructive method in the analysis of the homogeneity of a concrete foundation in a tunnel structure. e-Zbornik: Electronic Collection of Papers, Faculty of Civil Engineering, University of Mostar, 15(30), 71–83. https://doi.org/10.47960/2232-9080.2025.30.15.71.
Benedetto A. & Pajewski L. (eds.), 2015. Civil Engineering Applications of Ground Penetrating Radar. Springer, Cham. https://doi.org/10.1007/978-3-319-04813-0.
Benedetto A., Tosti F., Bianchini Ciampoli L. & D’Amico F., 2016. An overview of ground-penetrating radar signal processing techniques for road inspections. Signal Processing, 132, 201–217. https://doi.org/10.1016/j.sigpro.2016.05.016.
Bristow C.S. & Jol H.M., 2003. An introduction to ground penetrating radar (GPR) in sediments. [in:] Bristow C.S. & Jol H.M. (eds.), Ground Penetrating Radar in Sediments, Geological Society Special Publications, 211, Geological Society, London, 1–7. https://doi.org/10.1144/GSL.SP.2001.211.01.01.
Catapano I., Gennarelli G., Ludeno G., Soldovieri F. & Persico R., 2019. Ground-penetrating radar: Operation principle and data processing. [in:] Webster J.G. (ed.), Wiley Encyclopedia of Electrical and Electronics Engineer-ing, Wiley, Hoboken, NJ, 1–23. https://doi.org/10.1002/047134608x.w8383.
Conyers L.B., 2013. Ground-Penetrating Radar for Archaeology (3rd ed.). AltaMira Press, Lanham.
Costello S.B., Chapman D.N., Rogers C.D.F. & Metje N., 2007. Underground asset location and condition assessment technologies. Tunnelling and Underground Space Technology, 22(5–6), 524–542. https://doi.org/10.1016/j.tust.2007.06.001.
Daniels D.J., 2004. Ground Penetrating Radar (2nd ed.). IET Radar, Sonar and Navigation Series, 15, The Institution of Engineering and Technology, London.
Davis J.L. & Annan A.P., 1989. Ground-penetrating radar for high-resolution mapping of soil and rock stratigraphy. Geophysical Prospecting, 37(5), 531–551. https://doi.org/10.1111/j.1365-2478.1989.tb02221.x.
Domitrović J., Dukić M., Bezina Š., Stančerić I. & Rukavina T., 2024. Reliability of GPR data interpretation methods for determining the thickness of asphalt layer. [in:] Lakušić S. (ed.), Road and Rail Infrastructure VIII: Proceedings of the 8th International Conference on Road and Rail Infrastructures – CETRA 2024, 15–17 May 2024, Cavtat, Croatia, University of Zagreb, Zagreb, 717–723. https://doi.org/10.5592/CO/CETRA.2024.1652.
Filipović S., Bektašević E., Gutić K., Musa N. & Sakić N., 2025. Research on the phenomenon of increasing borehole diameter at the installation of rod anchors in marl using wet technology compared to dry drilling procedure. Global Journal of Engineering and Technology Advances, 22(2), 001–014. https://doi.org/10.30574/gjeta.2025.22.2.0019.
Gabryś M. & Ortyl Ł., 2020. Georeferencing of multi-channel GPR – accuracy and efficiency of mapping of underground utility networks. Remote Sensing, 12(18), 2945. https://doi.org/10.3390/rs12182945.
Ghanbari S., Hafizi M. K., Bano M., Ebrahimi A. & Hosseinzadeh N., 2022. An enhanced GPR-based data processing approach for detecting subsurface utilities in urban distribution networks. Journal of Applied Geophysics, 207, 104831. https://doi.org/10.1016/j.jappgeo.2022.104831.
Goodman D., 1994. Ground-penetrating radar simulation in engineering and archaeology. Geophysics, 59(2), 224–232. https://doi.org/10.1190/1.1443584.
Goodman D. & Piro S., 2013. GPR Remote Sensing in Archaeology. Springer, Berlin–Heidelberg. https://doi.org/10.1007/978-3-642-31857-3.
He T. & Shang H., 2020. Direct-wave denoising of low-frequency ground-penetrating radar in open pits based on empirical curvelet transform. Near Surface Geophysics, 18(2), 451–462. https://doi.org/10.1002/nsg.12095.
Hislop G., 2016. Limitations of characterizing layered earth with off-ground GPR. Journal of Geophysics and Engineering, 13(2), S1–S8. https://doi.org/10.1088/1742-2132/13/2/S1.
Huurne R.B.A., ter, Olde Scholtenhuis L.L., Dorée A.G., 2024. Ground penetrating radar at work: A realistic perspective on utility surveying in the Netherlands through a comprehensive ground-truth dataset. Data in Brief, 54, 110329. https://doi.org/10.1016/j.dib.2024.110329.
ImpulseRadar GPR Team., 2021. GPR antenna frequency vs. depth penetration vs. resolution. ImpulseRadar. https://impulseradargpr.com/gpr-antenna-frequency-vs-depth-penetration-vs-resolution/ [access: 4.07.2025].
Jol H.M. (ed.), 2009. Ground Penetrating Radar: Theory and Applications. Elsevier.
Jol H.M. & Bristow C.S., 2006. Ground-penetrating radar profile spacing and orientation for subsurface resolution of linear features. Geophysical Prospecting, 54(1), 63–72. https://doi.org/10.1111/j.1365-2478.2006.00516.x.
Kim S.S., 2022. Assessment of pavement structural conditions using a ground-penetrating radar. Engineering Proceedings, 17(1), 1. https://doi.org/10.3390/engproc2022017001.
Kruk J., van der, Slob E.C. & Fokkema J.T., 1998. Background of ground penetrating radar measurements. Geologie en Mijnbouw, 77(2), 177–188.
Luo T.X.H. & Lai W.W.L., 2020. GPR pattern recognition of shallow subsurface air voids. Tunnelling and Underground Space Technology, 99, 103355. https://doi.org/10.1016/j.tust.2020.103355.
Massarelli C., Campanale C. & Uricchio V.F., 2021. Ground penetrating radar as a functional tool to outline the presence of buried waste: A case study in South Italy. Sustainability, 13(7), 3805. https://doi.org/10.3390/su13073805.
Neal A., 2004. Ground penetrating radar and its use in sedimentology: Principle, problem and progress. Earth-Science Reviews, 66, 261–330. https://doi.org/10.1016/j.earscirev.2004.01.004.
Pajewski L., Benedetto A., Loizos A., Slob E., Tosti F. & Roberts S., 2014. Civil engineering applications of ground penetrating radar: First-year activities and results. Geophysical Research Abstracts, 16, EGU2014_16933.
Poluha B., Porsani J.L., Almeida E.R., dos Santos V.R.N. & Allen S.J., 2017. Depth estimates of buried utility systems using the GPR method: Studies at the IAG/USP Geophysics Test Site. International Journal of Geosciences, 8(5), 726–742. https://doi.org/10.4236/ijg.2017.85040.
Rangole A., De S., Kuchekar N. & Bazil Raj A.A., 2024. A comprehensive review of ground penetrating radar: Techniques, applications and future directions. International Journal of Engineering Research and Reviews, 12(3), 30–53. https://doi.org/10.5281/zenodo.13842586.
Rasol M., Perez-Gracia V. & Santos-Assunçao S., 2021. Development of new GPR methodologies for soil and cement concrete pavement assessment. Universitat Politècnica de Catalunya, Barcelona [PhD thesis]. https://doi.org/10.13140/RG.2.2.32976.74242.
Rasol M., Perez-Gracia V., Fernandes F., Pais J., Santos-Assunçao S. & Roberts S., 2022. Ground penetrating radar system: Principles. [in:] D’Amico S. & Venuti V. (eds.), Handbook of Cultural Heritage Analysis, Springer, Cham, 705–738. https://doi.org/10.1007/978-3-030-60016-7_25.
Reynolds J.M., 2011. An Introduction to Applied and Environmental Geophysics (2nd ed.). Wiley-Blackwell.
Rhee J.-Y., Park K.-T., Cho J.-W. & Lee S.-Y., 2021. A study of the application and the limitations of GPR investigation on underground survey of the Korean expressways. Remote Sensing, 13(9), 1805. https://doi.org/10.3390/rs13091805.
Robinson M., Bristow C., McKinley J. & Ruffell A., 2013. Ground-penetrating radar guidelines: Survey design and implementation. Geomorphological Techniques, 1(5.5). https://pure.qub.ac.uk/en/publications/431bd8bd-279f-4d95-8434-84b38c63a9d5.
Sukhenko A., Meirambekuly N., Syzdykov A., Mukhamedgali A. & Mellatova Y., 2025. GNSS for high-precision and reliable positioning: A review of correction techniques and system architectures. Applied Sciences, 15(22), 12304. https://doi.org/10.3390/app152212304.
Travassos X., Ida N., Avila S.L. & Adriano R., 2018. A review of ground penetrating radar antenna design and optimization. Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 17(3), 385. https://doi.org/10.1590/2179-10742018v17i31321.
Vilventhan A., 2016. Interrelationships of factors causing delays in the relocation of utilities: A cognitive mapping approach. Engineering, Construction and Architectural Management, 23(3), 349–368. https://doi.org/10.1108/ECAM-10-2014-0127.
Wang S., Liu G., Jing G., Feng Q., Liu H. & Guo Y., 2022. State-of-the-art review of ground penetrating radar (GPR) applications for railway ballast inspection. Sensors, 22(7), 2450. https://doi.org/10.3390/s22072450.
Xie X., Zeng C. & Wang Z., 2013. GPR signal enhancement using band-pass and K–L filtering: A case study for the evaluation of grout in a shielded tunnel. Journal of Geophysics and Engineering, 10(3), 034003. https://doi.org/10.1088/1742-2132/10/3/034003.
Zembillas N., 2010. Subsurface utility engineering: A proven solution. [in:] FIG Congress 2010: Facing the Challenges – Building the Capacity: Sydney, Australia, 11–16 April 2010, International Federation of Surveyors, 1–9. https://www.fig.net/resources/proceedings/fig_proceedings/fig2010/papers/fs04g/fs04g_zembillas_4659.pdf.
Zhang J., Hu Q., Zhou Y., Zhao P. & Duan X., 2024. A multi-level robust positioning method for three-dimensional ground penetrating radar (3D GPR) road underground imaging in dense urban areas. Remote Sensing, 16(9), 1559 https://doi.org/10.3390/rs16091559.
Zhou Y., Wong P.T. W., Li Y., Lai W.W.L. & Wang J., 2026. Enhancing multichannel ground penetrating radar (MCGPR) positioning using cross-channel data. Measurement, 257(Part B), 118715. https://doi.org/10.1016/j.measurement.2025.118715.
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