https://scholars.lib.ntu.edu.tw/handle/123456789/576091
標題: | Application of geological mapping using airborne-based lidar dem to tunnel engineering: Example of dongao tunnel in northeastern Taiwan | 作者: | Lo P.-C Lo W Wang T.-T Hsieh Y.-C. TAI-TIEN WANG |
公開日期: | 2021 | 卷: | 11 | 期: | 10 | 來源出版物: | Applied Sciences (Switzerland) | 摘要: | The use of digital elevation models (DEMs) that use airborne-based light detection and the ranging technique (airborne-based LiDAR) to understand large-scale geological structures has be-come important in geological surveying and mapping. Taking the Dongao Tunnel area in northeastern Taiwan as the study area, this study used the airborne-based LiDAR DEM and related value-added maps to interpret the topographic and geomorphic features of the area and identify locations for geological investigation. The characteristics of the rock mass were observed on-site and revealed by excavation of the highway tunnel in the study area; they were compared with the interpreted topographic and geomorphic features to determine the potential of using 1 m-resolution LiDAR DEM in geological surveys and in the evaluation of engineering characteristics of underground rock masses. The results of this study demonstrated that the DEM accurately captured geomorphic features: the strata composed of slate and schist had distinct appearances in both the clinometric map and the hillshade map; the locations of faults, lineaments, and drainage were consistent with those observed on-site, and the positions of these features were captured more accurately than those on conventional maps. Evident microrelief features, including the distribution of scarps, erosion gullies, and mini-drainage systems provide an effective basis for interpreting a deep-seated gravitational deformation slope and for an on-site inspection for validation. The use of high-resolution LiDAR DEM to interpret geomorphic features along with geological surveys provides a more comprehen-sive understanding of the survey area, supporting surveys and geological mapping, revealing the locations of potential slope failures, and enabling the assessment of tunnel engineering risks. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85106654249&doi=10.3390%2fapp11104404&partnerID=40&md5=433e845c54c418fbb28c00478411e1cc https://scholars.lib.ntu.edu.tw/handle/123456789/576091 |
ISSN: | 20763417 | DOI: | 10.3390/app11104404 |
顯示於: | 土木工程學系 |
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