터널과지하공간 (Tunnel and Underground Space)

  • 제31권6호
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  • Pages.549-560
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  • 2021
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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개별요소법 및 유한차분법 연계 모델을 활용한 복합지반 TBM 굴진 시 TBM에 작용하는 힘의 수치해석적 분석

Numerical Evaluation of Forces on TBM during Excavation in Mixed Ground Condition by Coupled DEM-FDM

  • 최순욱 (한국건설기술연구원 지하공간안전연구센터) ;
  • 이효범 (고려대학교 미래건설환경융합연구소) ;
  • 최항석 (고려대학교 건축사회환경공학부) ;
  • 장수호 (한국건설기술연구원 건설산업진흥본부) ;
  • 강태호 (한국건설기술연구원 지하공간안전연구센터) ;
  • 이철호 (한국건설기술연구원 지하공간안전연구센터)
  • Choi, Soon-Wook (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Hyobum (Future and Fusion Lab of Architectural, Civil and Environmental Engineering, Korea University) ;
  • Choi, Hangseok (School of Civil Environmental and Architectural Engineering, Korea University) ;
  • Chang, Soo-Ho (Construction Industry Promotion Department, Korea Institute of Civil Engineering and Building Technology) ;
  • Kang, Tae-Ho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Chulho (Underground Space Safety Research Center, Korea Institute of Civil Engineering and Building Technology)
  • 투고 : 2021.12.01
  • 심사 : 2021.12.15
  • 발행 : 2021.12.31
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초록

쉴드 TBM(Tunnel Boring Machine) 굴진 시 TBM에 작용하는 커터헤드 토크, 추력, 챔버압, 상향력 등은 TBM의 굴진성능을 결정하는 데 매우 중요한 요소들이다. 그러나 균질한 지반 조건에 비해 복합지반을 굴진할 때 TBM에 작용하는 힘들은 그 경향이 달라 TBM 굴진성능을 저해할 수 있다. 따라서 본 연구에서는 복합지반 굴진이 TBM에 작용하는 토크, 추력, 챔버압, 상향력에 미치는 영향을 수치해석적으로 모사하고자 하였다. 해석 모델은 개별요소법(DEM, discrete element method)과 유한차분법(FDM, finite difference method)을 연계하는 방안을 적용한 TBM 굴진 모델을 사용하였다. 본 연구에서는 상부 화강풍화토와 하부 풍화암으로 구성된 복합지반을 굴진하는 것을 가정하여 굴진을 모사하였으며, 복합지반 경계면의 위치, 경사에 따라 TBM에 작용하는 힘에 대한 영향을 해석적으로 분석하였다.

Forces exerted on a shield TBM (tunnel boring machine) such as cutter head torque, thrust force, chamber pressure, and upward force are key factors determining TBM performance. However, the forces acting on the TBM when tunnelling the mixed ground have different tendencies compared to that of the uniform ground, which could impair TBM performance. In this study, the effect of mixed ground tunnelling was numerically investigated with torque, thrust force, chamber pressure, and upward force. A coupled discrete element method (DEM) and finite difference method (FDM) model for TBM driving model was used. This numerical study simulates TBM tunnelling in mixed ground composed of upper weathered granite soil and lower weathered rock. The effect on the force acting on the TBM according to the location and slope of the boundary of the mixed ground was numerically examined.

키워드

과제정보

본 연구는 국토교통부 국토교통과학기술진흥원의 건설기술연구사업(과제번호: 21SCIP-C129646-05)인 "TBM 커터헤드 설계 자동화 및 운전·제어시스템 개발"의 지원으로 수행되었습니다.

참고문헌

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