Monitoring instability steep slope using three-dimension point clouds at multiple time

T. Kikuchi, K. Sakita, S. Nishiyama, T. Hatano



Recent years have seen reports of rock collapses and rock-falls from steep slopes, even if such points have not been extracted as those requiring inspection. In the maintenance of steep slopes, it is important to confirm the presence of rock-falls and source rocks corresponding to the outlined survey; however, it can be difficult to investigate from the target structure to the vicinity of the ridge because of cost concerns and vegetation overgrowth. It is important to obtain detailed geographical information for an efficient overview survey; therefore, laser measurement technologies with significant performance improvements have been used in the field of slope disasters including public surveys and the study of landslides, and it is expected that the utility of these technologies will further increase. Herein, multiple combinations of airborne and ground-based laser measurement technologies were used to study steep slopes facing a river. Fluctuation analysis was performed using three-dimensional (3D) point cloud data obtained via laser measurements. As a result, airborne laser measurements deciphered 1.5-m high scarplets. Furthermore, by conducting displacement vector analysis, we grasped the tendency of fluctuation that gradually increased from the mountain to the river. In addition, for the overhanging blocks closest to the river, we detected an average variation of 141 mm via displacement vector analysis using a terrestrial laser scanner (TLS) with a 2-m mesh. We report the evaluated behavior of steep slopes depending on the type of topography and geology and the effectiveness of the technology as a periodic measurement method for maintenance purposes.

ホスト出版物のタイトルISRM International Symposium - EUROCK 2020
編集者C.C. Li, H. Odegaard, A.H. Hoien, J. Macias
出版社International Society for Rock Mechanics
出版ステータスPublished - 2020
イベントISRM International Symposium - EUROCK 2020 - Trondheim, Virtual
継続期間: 6月 14 20206月 19 2020


名前ISRM International Symposium - EUROCK 2020


ConferenceISRM International Symposium - EUROCK 2020
CityTrondheim, Virtual

ASJC Scopus subject areas

  • 地球化学および岩石学


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