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2024 Vol.34, Issue 4 Preview Page

Research Article

Kinematic Analysis of a Rock Slope Using Terrestrial LiDAR Data and Three Dimensional Semi-Automatic Extraction

지상 LiDAR 자료의 3차원 반자동 추출기법을 이용한 암반사면의 운동학적 해석

Young-Suk Song1*
,
Catani Filippo2
송 영석1*
,
Filippo Catani2
1Principal Researcher, Geologic Hazards Division, Korea Institute of Geoscience and Mineral Resources
2Professor, Department of Geosciences, University of Padua
1한국지질자원연구원 지질재해연구본부 책임연구원
2파도바대학교 지구과학과 교수
*Corresponding Author
31 December 2024. pp. 529-547
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Abstract

A semi-automatic extraction technique applied to terrestrial LiDAR data was used to identify discontinuities on the surface of a rock slope. Subsequent three-dimensional kinematic analysis was used to determine various failure modes and their locations. First, applying the semi-automatic extraction technique to terrestrial LiDAR data identified 480 poles to the planar structure from the discontinuity sets associated with a rock slope at Guimyeonam. The predominant aspects of the slope are west-northwest and east-southeast as well as north-northeast to south-southwest and northwest to southeast. The three-dimensional kinematic analysis used DiAna3D software, which enabled the automatic calculation of the number of poles satisfying failure criteria while intersecting the primary discontinuities and topography. This analysis enabled an estimation of various kinematic indices for planar failure (PF), wedge failure (WF), toppling failure (FT), block toppling (BT), and free falling (FF). The estimated ranges for the three-dimensional kinematic indices were as follows: PF 0 to 34.38%, WF 0 to 24.35%, BT 0 to 0.41%, FT 0 to 38.84%, and FF 0 to 40.00%. PF and FT are likely to occur over wide areas of the Guimyeonam rock slope, while WF and FF are likely to occur in specific sections. The results were validated by field investigations at Guimyeonam.

Keywords
rock slope
terrestrial LiDAR data
semi-automatic extraction technique
three-dimensional kinematic index
failure mode

암반사면을 대상으로 지상 LiDAR 자료에 대한 반자동 추출기법을 이용하여 암반 표면의 불연속면을 선정하고, 3차원 운동학적 해석을 적용하여 다양한 파괴형태와 발생위치를 파악할 수 있다. 먼저 지상 LiDAR 자료에 대한 반자동 추출기법을 통하여 설악산국립공원의 귀면암 암반사면에 대한 불연속면 군에서 총 480개의 극점을 선정하였다. 귀면암 암반사면의 경사 방향은 서북서와 동남동의 방향이 우세하지만 북북동-남남서 및 북서-남동의 방향도 명확하게 나타났다. 3차원 운동학적 해석을 위하여 DiAna3D 프로그램을 이용하였으며, 주요 불연속면과 지형이 교차되면서 파괴기준을 만족하는 극점의 수를 자동으로 계산하였다. 이를 토대로 평면파괴(PF), 쐐기파괴(WF), 휨전도(FT), 블록전도(BT), 자유낙석(FF)에 대한 운동학적 지수를 산정하였다. 3차원 운동학적 지수에 대한 산정결과 평면파괴(PF)는 0~34.38%, 쐐기파괴(WF)는 0~24.35%, 블록전도(BT)는 0~0.41%, 휨전도(FT)는 0~38.84%, 자유낙석(FF)은 0~40.00%의 범위에 있는 것으로 계산되었다. 귀면암 암반사면의 경우 전체적으로 평면파괴(PF)와 휨전도(FT)가 넓게 분포되어 있으며, 쐐기파괴(WF)와 자유낙석(FF)이 특정구간에서 발생될 가능성이 높은 것으로 나타났다. 또한 파괴가능성이 높은 구간에 대하여 실제 현장조사를 통한 확인을 수행하였다.

키워드
암반사면
지상 LiDAR
반자동 추출기법
3차원 운동학적 지수
파괴형태
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 34
  • No :4
  • Pages :529-547
  • Received Date : 2024-10-07
  • Revised Date : 2024-11-20
  • Accepted Date : 2024-11-21
  • DOI :https://doi.org/10.9720/kseg.2024.4.529
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