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2024 Vol.34, Issue 5 Preview Page

Technical Note

A Study on Applicability Evaluation on Portable 3D Scanner for Measurement of Rock Joint Roughness

암반 절리면 거칠기 측정을 위한 휴대용 3D스캐너의 적용성 평가 연구

Hyun-Sik Kim1
,
Seungbeom Choi2
,
Seong Jun Ha2
,
Hoyoung Jeong3*
김 현식1
,
최 승범2
,
하 성준2
,
정 호영3*
1BS Course, Department of Energy Resources Engineering, Pukyong National University
2Senior Researcher, Korea Atomic Energy Research Institute(KAERI)
3Assistant Professor, Department of Energy Resources Engineering, Pukyong National University
1부경대학교 에너지자원공학과 학사과정
2한국원자력연구원 선임연구원
3부경대학교 에너지자원공학과 조교수
*Corresponding Author
31 October 2024. pp. 449-460
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Abstract

The roughness of rock joint surfaces is considered a critical factor in determining the stability of underground spaces and tunnels, leading to attempts to measure it using various devices. This study explored the applicability of portable 3D scanner for measuring rock joint roughness in comparison to laser scanner. By constructing various one-dimensional roughness profiles using laser scanner and portable 3D scanner, and calculating the Z2(statistical roughness parameter) for comparison, it was found that the portable 3D scanner tends to underestimate roughness compared to the laser scanner. The variations in roughness and Z2 showed very similar patterns between the two devices. Through Direct shear tests that induced wear on the specimens, differences in roughness and Z2 due to wear were compared using the portable 3D scanner, confirming variations in roughness height and Z2 related to wear.

Keywords
Joint roughness
Portable 3D scanner
Laser scanner
Z2

암석 절리면의 거칠기는 지하공간 및 터널 주변 암반의 안정성을 결정하는 중요한 인자로 고려되는 만큼 정량적으로 평가하는 것이 중요하다. 본 연구는 암석 절리면의 거칠기를 경제적으로 측정하기 위한 휴대용 3D 스캐너의 적용 가능성을 기존의 레이저스캐너와 비교하여 고찰하였다. 레이저스캐너 및 휴대용 3D 스캐너를 통해 동일한 암석 절리면에 대한 일차원 거칠기, Z2(통계적 거칠기 파라미터)를 산정하여 비교하였다. 전반적으로 두 기기를 통해 측정된 암석 절리면의 거칠기 형상은 매우 유사한 것으로 평가되었으며, 측정된 거칠기의 변화양상도 유사하였다. 그러나 특정지점에서 거칠기를 다소 과소평가하는 것으로 나타나, 이를 보완하기 위한 연구가 필요할 것으로 판단되었다. 또한 직접전단시험을 통해 거칠기를 단계적으로 감소시켜가며 휴대용 3D 스캐너를 통해 거칠기의 변화 양상을 관찰하였다. 반복적인 전단시험에 의해 일차원거칠기와 Z2가 지속적으로 감소하는 양상을 휴대용 3D 스캐너를 통해 명확하게 확인할 수 있었다.

키워드
절리면 거칠기
휴대용 3D 스캐너
레이저스캐너
Z2
References
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Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 34
  • No :5
  • Pages :449-460
  • Received Date : 2024-10-08
  • Revised Date : 2024-10-16
  • Accepted Date : 2024-10-16
  • DOI :https://doi.org/10.7474/TUS.2024.34.5.449
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