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Volume 15, Issue 3 (Autumn 2025)
Disaster Prev. Manag. Know. 2025, 15(3): 344-363 |
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Esmaeili S, Bolbolvand M, Ahmadzadeh Irandoust M, Talebi M. Identifying Subsurface Cavities and Fractures in Roads Using the Ground Penetrating Radar With Two 170-and 600-MHz Central Antennas: A Case Study in Iran. Disaster Prev. Manag. Know. 2025; 15 (3) :344-363
URL: http://dpmk.ir/article-1-809-en.html
URL: http://dpmk.ir/article-1-809-en.html
1- Department of Sciences, Faculty of Physics, Razi University, Kermanshah, Iran.
2- Tehran Disaster Mitigation and Management Organization (TDMMO), Tehran, Iran.
3- Department of Earth and Space Sciences, Southern University of Science and Technology (SUSTech), Shenzhen, China.
4- Tehran Disaster Mitigation and Management Organization (TDMMO), Tehran, Iran. & International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran.
2- Tehran Disaster Mitigation and Management Organization (TDMMO), Tehran, Iran.
3- Department of Earth and Space Sciences, Southern University of Science and Technology (SUSTech), Shenzhen, China.
4- Tehran Disaster Mitigation and Management Organization (TDMMO), Tehran, Iran. & International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran.
Abstract: (476 Views)
Background and Objective This study aimed to investigate the effectiveness of ground-penetrating radar
(GPR) for identifying subsurface cavities and fractures in roads.
Method Data were collected using a GPR system (model 1760, ImpulseRadar Co., Sweden), which had two central antennas with frequencies of 170 and 600 MHz. Data acquisition was carried out in three areas: A road under construction in the Gachsaran Formation, a section of an asphalt-paved street in Ilam province, and an area including an old, small, buried tunnel in Kermanshah City. The geology of these areas is different and ranges from the Gachsaran Formation to Holocene sediments. The distance determined for the data acquisition step was 4 centimeters. The wave penetration depth in both antennas varied by geology type in these areas. The data after different processing steps were examined using wave-spectrum analysis, characteristics, and evidence of anomalies to distinguish cavities and fractures.
Results After performing all the processing steps, the results confirmed the presence of cavities and fractures. Also, the high agreement in the overlapping areas between the two antennas was clearly visible.
Conclusion Since choosing the appropriate antenna frequency for GPR plays a key role in the ability to properly detect the electrical properties of materials, the results show the proper efficiency of the GPR method with the aforementioned antennas in identifying subsurface cavities and fractures in roads.
(GPR) for identifying subsurface cavities and fractures in roads.
Method Data were collected using a GPR system (model 1760, ImpulseRadar Co., Sweden), which had two central antennas with frequencies of 170 and 600 MHz. Data acquisition was carried out in three areas: A road under construction in the Gachsaran Formation, a section of an asphalt-paved street in Ilam province, and an area including an old, small, buried tunnel in Kermanshah City. The geology of these areas is different and ranges from the Gachsaran Formation to Holocene sediments. The distance determined for the data acquisition step was 4 centimeters. The wave penetration depth in both antennas varied by geology type in these areas. The data after different processing steps were examined using wave-spectrum analysis, characteristics, and evidence of anomalies to distinguish cavities and fractures.
Results After performing all the processing steps, the results confirmed the presence of cavities and fractures. Also, the high agreement in the overlapping areas between the two antennas was clearly visible.
Conclusion Since choosing the appropriate antenna frequency for GPR plays a key role in the ability to properly detect the electrical properties of materials, the results show the proper efficiency of the GPR method with the aforementioned antennas in identifying subsurface cavities and fractures in roads.
Keywords: Georadar, Subsurface drilling, Multi-frequency antenna, Signal processing, Roads and passages
Type of Study: Research |
Subject:
Special
Received: 2025/08/10 | Accepted: 2025/09/18 | ePublished: 2025/10/1
Received: 2025/08/10 | Accepted: 2025/09/18 | ePublished: 2025/10/1
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