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2014 Vol.16, Issue 2 Preview Page
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

Gyu-Jin Bae1
,
Soo-Ho Chang2*
,
Young-Taek Park3
,
Soon-Wook Choi4
,
Gyu-Phil Lee3
,
Jun-Yong Kwon6
,
Kyoung-Tae Han7
배 규진1
,
장 수호2*
,
박 영택3
,
최 순욱4
,
이 규필3
,
권 준용6
,
한 경태7
1Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Senior Research Fellow
2Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Research Fellow
3Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Senior Researcher
4Geotechnical Engineering Research Division, Korea Institute of Construction Technology, Researcher
6Plant Team, DongAh Geological Engineering Co., Ltd., General Manager
7Engineering 1 Department, DongAh Geological Engineering Co., Ltd., General Manager
1한국건설기술연구원 Geo-인프라연구실 선임연구위원
2한국건설기술연구원 Geo-인프라연구실 연구위원
3한국건설기술연구원 Geo-인프라연구실 수석연구원
4한국건설기술연구원 Geo-인프라연구실 전임연구원
6㈜동아지질 플랜트팀 부장
7㈜동아지질 엔지니어링 1부 부장
*교신저자. *Corresponding Author. 
31 March 2014. pp. 161-172
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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.

Keywords
TBM
Cutterhead
Disc cutter
Cutter acting force
Excavation performance

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.

키워드
TBM
커터헤드
전기비저항
디스크커터
커터 작용력
굴진성능
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Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 16
  • No :2
  • Pages :161-172
  • Received Date : 2014-02-24
  • Revised Date : 2014-03-04
  • Accepted Date : 2014-03-07
  • DOI :https://doi.org/10.9711/KTAJ.2014.16.2.161
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