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http://dx.doi.org/10.9720/kseg.2019.3.251

Application of Terrestrial LiDAR to Monitor Unstable Blocks in Rock Slope  

Song, Young-Suk (Geo-Environmental Hazard Research Center, Korea Institute of Geoscience and Mineral Resources, Geologic Environment Division)
Lee, Choon-Oh (Korea Institute of Geoscience and Mineral Resources, Geologic Environment Division)
Oh, Hyun-Joo (Korea Institute of Geoscience and Mineral Resources, Geologic Environment Division)
Pak, Jun-Hou (Korea National Park Service, Korea National Park Research Institute)
Publication Information
The Journal of Engineering Geology / v.29, no.3, 2019 , pp. 251-264 More about this Journal
Abstract
The displacement monitoring of unstable block at the rock slope located in the Cheonbuldong valley of Seoraksan National Park was carried out using Terrestrial LiDAR. The rock slopes around Guimyeonam and Oryeon waterfall where rockfall has occurred or is expected to occur are selected as the monitoring section. The displacement monitoring of unstable block at the rock slope in the selected area was performed 5 times for about 7 months using Terrestrial LiDAR. As a result of analyzing the displacement based on the Terrestrial LiDAR scanning, the error of displacement was highly influenced by the interpolation of the obstruction section and the difference of plants growth. To minimize the external influences causing the error, the displacement of unstable block should be detected at the real scanning point. As the result of analyzing the displacement of unstable rock at the rock slope using the Terrestrial LiDAR data, the amount of displacement was very small. Because the amount of displacement was less than the range of error, it was difficult to judge the actual displacement occurred. Meanwhile, it is important to select a section without vegetation to monitor the precise displacement of unstable rock at the rock slope using Terrestrial LiDAR. Also, the PointCloud removal and the mesh model analysis in a vegetation section were the most important work to secure reliability of data.
Keywords
rock slope; unstable block; rockfall monitoring; terrestrial LiDAR; displacement analysis;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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