Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Manufacturing of an earth pressure balanced shield TBM cutterhead for a subsea discharge tunnel and its field performance analysis

해저 배출관로 건설을 위한 토압식 쉴드TBM 커터헤드의 설계·제작 및 현장 굴진성능의 분석

  • Bae, Gyu-Jin (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Chang, Soo-Ho (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Park, Young-Taek (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Choi, Soon-Wook (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Lee, Gyu-Phil (Geotechnical Engineering Research Division, Korea Institute of Construction Technology) ;
  • Kwon, Jun-Yong (Plant Team, DongAh Geological Engineering Co., Ltd.) ;
  • Han, Kyoung-Tae (Engineering 1 Department, DongAh Geological Engineering Co., Ltd.)
  • 배규진 (한국건설기술연구원 Geo-인프라연구실) ;
  • 장수호 (한국건설기술연구원 Geo-인프라연구실) ;
  • 박영택 (한국건설기술연구원 Geo-인프라연구실) ;
  • 최순욱 (한국건설기술연구원 Geo-인프라연구실) ;
  • 이규필 (한국건설기술연구원 Geo-인프라연구실) ;
  • 권준용 ((주)동아지질 플랜트팀) ;
  • 한경태 ((주)동아지질 엔지니어링 1부)
  • Received : 2014.02.24
  • Accepted : 2014.03.07
  • Published : 2014.03.30
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Abstract

An earth pressure balanced shield TBM with the diameter of 4.4 m was designed and manufactured for a subsea discharge tunnel excavation. Its cutterhead was designed to be optimized for the strongest rock mass condition in the tunnel alignment, and then the applicability of the refurbished shield TBM was validated for its maximum capacity. Especially, the maximum cutter penetration depth for the strongest rock mass condition should be kept to be below 7 mm/rev in order to satisfy the allowable capacities of the shield TBM. From the analysis of TBM advance data, approximately 95% of field data showed the cutter penetration depth below 7 mm/rev. In addition, it was certified that the acting forces of every disc cutter, TBM thrust and torque during TBM driving were within the allowable capacities of the shield TBM and its disc cutters. When real acting forces of the disc cutters in the field were compared with those predicted by the CSM model, they showed the close relationships with each other even though the predictions by the CSM model were approximately 22~25% higher than field data.

본 연구에서는 해저 배출관로 건설을 위한 직경 4.4 m 토압식 쉴드TBM을 설계 제작하였다. 압축강도가 가장 큰 구간을 대상으로 커터헤드를 설계하고 쉴드TBM의 핵심 사양을 검토하였다. 쉴드TBM의 최대 용량을 만족하기 위해서는 디스크커터의 관입깊이를 7 mm/rev 이하로 적용해야 하는 것으로 나타났다. 설계 제작된 재활용 쉴드TBM의 현장 굴진자료를 분석한 결과, 약 95%의 현장 관입깊이가 7 mm/rev이하였으며, 디스크커터와 TBM 최대 용량 이내로 굴진이 이루어졌음을 확인하였다. 또한 CSM모델에 의한 커터 작용력과 현장의 커터 작용력을 비교한 결과, CSM모델로 예측한 커터 적용력이 약 22~25% 크게 나타났으나 대체로 현장의 커터 작용력과 유사한 경향을 나타내었다.

Keywords

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Cited by

  1. Refurbishment of a 3.6 m earth-pressure balanced shield TBM with a domestic cutterhead and its field verification vol.17, pp.4, 2015, https://doi.org/10.9711/KTAJ.2015.17.4.457