Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Generation of a 3D Artificial Joint Surface and Characterization of Its Roughness

삼차원 인공 절리면의 생성과 이에 대한 거칠기 특성 평가

  • 최승범 (서울대학교 공과대학 에너지시스템공학부) ;
  • 이수득 (서울대학교 공과대학 에너지시스템공학부) ;
  • 전석원 (서울대학교 공과대학 에너지시스템공학부)
  • Received : 2016.12.13
  • Accepted : 2016.12.27
  • Published : 2016.12.31
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Abstract

Roughness of a joint surface is one of the most important parameters that affects the mechanical and hydraulic behavior of rock mass. Therefore, various studies on making constitutive model and/or roughness quantification have been conducted in experimental and empirical manners. Advances in recent 3D printing technology can be utilized to generate a joint surface with a specific roughness. In this study, a reliable technique to generate a rough joint surface was introduced and its quantitative assessment was made. Random midpoint displacement method was applied to generate a joint surface and the distribution of $Z_2$ was investigated to assess its roughness. As a result, a certain roughness can be embodied by controlling input parameters and furthermore it was able to generate a joint surface with specific roughness anisotropy.

절리면의 거칠기는 암반의 역학적, 수리적 거동에 중요한 영향을 미치는 요인이다. 따라서 이를 해석하기 위한 여러 가지 구성 모델 및 거칠기 정량화 연구가 실험적, 경험적으로 수행되어 왔다. 최근 3D 프린팅 기술의 발전은 특정 거칠기를 갖는 절리면을 생성하는 데 활용될 수 있으며 본 논문에서는 이에 적합한 절리면 생성기법을 소개하고 정량적 평가를 수행하였다. 프랙탈 이론에 따른 랜덤중점변위법을 적용하였으며 생성된 절리면의 거칠기 평가는 $Z_2$의 분포를 계산하여 수행하였다. 그 결과 입력변수 제어를 통하여 목표로 한 거칠기를 구현할 수 있었으며 더 나아가 특정 거칠기 이방성비를 갖는 절리면을 생성할 수 있음을 확인하였다.

Keywords

References

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  1. Development of a New Method for the Quantitative Generation of an Artificial Joint Specimen with Specific Geometric Properties vol.11, pp.2, 2019, https://doi.org/10.3390/su11020373