Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar
Identification of slope subsurface strata for natural soil slopes is essential to assess the stability of potential landslides. The highly variable strata in a slope are hard to characterize by traditional boreholes at limited locations. Ground-penetrating radar (GPR) is a non-destructive method tha...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/16/2/415 |
| _version_ | 1797342602143465472 |
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| author | Tiancheng Wang Wensheng Zhang Jinhui Li Da Liu Limin Zhang |
| author_facet | Tiancheng Wang Wensheng Zhang Jinhui Li Da Liu Limin Zhang |
| author_sort | Tiancheng Wang |
| collection | DOAJ |
| description | Identification of slope subsurface strata for natural soil slopes is essential to assess the stability of potential landslides. The highly variable strata in a slope are hard to characterize by traditional boreholes at limited locations. Ground-penetrating radar (GPR) is a non-destructive method that is capable of capturing continuous subsurface information. However, the accuracy of subsurface identification using GPRs is still an open issue. This work systematically investigates the capability of the GPR technique to identify different strata via both laboratory experiments and on-site examination. Six large-scale models were constructed with various stratigraphic interfaces (i.e., sand–rock, clay–rock, clay–sand, interbedded clay, water table, and V–shaped sand–rock). The continuous interfaces of the strata in these models were obtained using a GPR, and the depths at different points of the interfaces were interpreted. The interpreted depths along the interface were compared with the measured values to quantify the interpretation accuracy. Results show that the depths of interfaces should be interpreted with the relative permittivity, back-calculated using on-site borehole information instead of empirical values. The relative errors of the depth of horizontal interfaces of different strata range within ±5%. The relative and absolute errors of the V–shaped sand–rock interface depths are in the ranges of [−9.9%, 10.5%] and [−107, 119] mm, respectively. Finally, the GPR technique was used in the field to identify the strata of a slope from Tanglang Mountain in China. The continuous profile of the subsurface strata was successfully identified with a relative error within ±5%. |
| first_indexed | 2024-03-08T10:35:39Z |
| format | Article |
| id | doaj.art-a51b831580fd4743be661e3bd2fb124c |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-08T10:35:39Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-a51b831580fd4743be661e3bd2fb124c2024-01-26T18:20:09ZengMDPI AGRemote Sensing2072-42922024-01-0116241510.3390/rs16020415Identification of Complex Slope Subsurface Strata Using Ground-Penetrating RadarTiancheng Wang0Wensheng Zhang1Jinhui Li2Da Liu3Limin Zhang4Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Shenzhen 518055, ChinaDepartment of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, ChinaGuangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Shenzhen 518055, ChinaChina Construction Science & Technology Co., Ltd., Shenzhen 518118, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong KongIdentification of slope subsurface strata for natural soil slopes is essential to assess the stability of potential landslides. The highly variable strata in a slope are hard to characterize by traditional boreholes at limited locations. Ground-penetrating radar (GPR) is a non-destructive method that is capable of capturing continuous subsurface information. However, the accuracy of subsurface identification using GPRs is still an open issue. This work systematically investigates the capability of the GPR technique to identify different strata via both laboratory experiments and on-site examination. Six large-scale models were constructed with various stratigraphic interfaces (i.e., sand–rock, clay–rock, clay–sand, interbedded clay, water table, and V–shaped sand–rock). The continuous interfaces of the strata in these models were obtained using a GPR, and the depths at different points of the interfaces were interpreted. The interpreted depths along the interface were compared with the measured values to quantify the interpretation accuracy. Results show that the depths of interfaces should be interpreted with the relative permittivity, back-calculated using on-site borehole information instead of empirical values. The relative errors of the depth of horizontal interfaces of different strata range within ±5%. The relative and absolute errors of the V–shaped sand–rock interface depths are in the ranges of [−9.9%, 10.5%] and [−107, 119] mm, respectively. Finally, the GPR technique was used in the field to identify the strata of a slope from Tanglang Mountain in China. The continuous profile of the subsurface strata was successfully identified with a relative error within ±5%.https://www.mdpi.com/2072-4292/16/2/415slopeground-penetrating radarstrata identificationsite investigationrelative permittivity |
| spellingShingle | Tiancheng Wang Wensheng Zhang Jinhui Li Da Liu Limin Zhang Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar Remote Sensing slope ground-penetrating radar strata identification site investigation relative permittivity |
| title | Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar |
| title_full | Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar |
| title_fullStr | Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar |
| title_full_unstemmed | Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar |
| title_short | Identification of Complex Slope Subsurface Strata Using Ground-Penetrating Radar |
| title_sort | identification of complex slope subsurface strata using ground penetrating radar |
| topic | slope ground-penetrating radar strata identification site investigation relative permittivity |
| url | https://www.mdpi.com/2072-4292/16/2/415 |
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