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Volume 15, Issue 3 (Autumn-In Press 2025)
Disaster Prev. Manag. Know. 2025, 15(3): 7-7 |
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Esmaeili S, Bolbolvan M, Ahmadzadeh Irandoust M, Talebi M. Identifying Subsurface Cavities and Fractures in Roads and Passages Using GPR and Using 170 and 600 MHz Central Antennas. Disaster Prev. Manag. Know. 2025; 15 (3) :7-7
URL: http://dpmk.ir/article-1-809-en.html
URL: http://dpmk.ir/article-1-809-en.html
1- Razi University, Kermanshah, Iran
2- Tehran Disaster Prevention 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 Prevention and Management Organization (TDMMO), Tehran, Iran & International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran
2- Tehran Disaster Prevention 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 Prevention and Management Organization (TDMMO), Tehran, Iran & International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran
Abstract: (28 Views)
This study investigated the effectiveness of the GPR method in identifying subsurface cavities and fractures in roads and passageways. In order to collect data, the Impulse-Radar Model 1760 GPR device, which has antennas with central frequencies of 170 and 600 MHz, was used. Data acquisition was carried out in three areas, including a road under construction, part of a street, and an area including an old, small-sized subsurface tunnel. The geology of these areas is different and ranges from the Gachsaran Formation to sediments of the present era. The distance determined for the data acquisition step was also considered to be 4 centimeters. The depth of wave penetration in both antennas in these areas is different according to the type of geology. The considered areas had outcrops of cavities and subsurface fractures, and they were used as evidence to confirm or reject the results. The data obtained after performing various processing steps were examined in terms of wave spectrum analysis and characteristics and evidence of the existence of anomalies to distinguish cavities and fractures. After performing all the processing and interpretation steps of the data, the results revealed the presence of cavities and fractures in the data. Also, the high agreement of the overlapping areas of the data in both antennas is clearly visible. Since choosing the appropriate antenna frequency plays a key role in the ability to properly detect the electrical properties of materials in the GPR method, the results show the appropriate efficiency of this method with the aforementioned antennas in identifying subsurface cavities and fractures in roads and passageways.
Keywords: Georadar, subsurface drilling, multi-frequency antenna, signal processing, roads and passageways
Type of Study: Applicable |
Subject:
Special
Received: 2025/09/1 | Accepted: 2025/10/18 | ePublished: 2025/12/21
Received: 2025/09/1 | Accepted: 2025/10/18 | ePublished: 2025/12/21
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