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2017 Vol.16, Issue 4 Preview Page
Numerical Study of Face Plate-Type EPB Shield TBM by Discrete Element Method

개별요소법을 활용한 면판형 토압식 쉴드TBM의 수치해석 연구

Chulho Lee1*
,
Soo-Ho Chang2
,
Soon-Wook Choi3
,
Byungkwan Park4
,
Tae-Ho Kang5
,
Jung Kil Sim6
이 철호1*
,
장 수호2
,
최 순욱3
,
박 병관4
,
강 태호5
,
심 정길6
1Member, Research Specialist, Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology
2Nonmember, Senior Research Fellow, Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology
3Member, Research Specialist, Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology
5Member, Budding Researcher, Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology
6Nonmember, Senior Research Engineer, Next Engineering & Service
*교신저자. *Corresponding Author. 
30 December 2017. pp. 163-176
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Abstract

The Discrete Element Method (DEM) has been widely used in civil engineering as well as various industrial fields to simulate granular materials. In this study, DEM was adopted to predict the performance of the face plate-type earth pressure balance (EPB) shield TBM (Tunnel Boring Machine). An analysis of the TBM excavation performance was conducted according to two pre-defined excavation conditions with the different rotation speeds per minute (RPM) of the cutterhead. The TBM model which was used in this study has a 6.64 m of diameter and six spokes. Also, 37 precutters and 98 scrapers at an each spoke were modeled with a real-scale specification. From the analysis, compressive forces at the cutterhead face, shield and cutting tools, resistant torques at the cutterhead face, muck discharge rate and accumulated muck discharge by the screw auger were measured and compared.

Keywords
EPB Shield TBM
TBM
Excavation
DEM
Face plate-type

개별요소법(Discrete Element Method, DEM)은 토목공학 등 입자형태의 재료를 다루는 분야에서 다양하게 이용된다. 본 연구 에서는 DEM 기법에 근거한 입자 역학 전용 해석 상용 소프트웨어를 사용하여 면판형 토압식 쉴드TBM 굴착성능을 평가하기 위한 수치 해석을 수행하였다. TBM에 대한 해석은 커터헤드의 회전속도가 다른 두 가지 조건에 대해 수행되었다. 해석 모델의 직경은 6.64m이며 6개의 스포크를 갖는 것으로 작성되었다. 또한, 37개의 프리커터와 98개의 스크래퍼가 각 스포크에 모델링 되었다. 해석결과를 통해, 커터헤드면과 쉴드, 절삭 도구에 작용하는 압축력과 커터헤드면에서 발생하는 저항 토크의 크기를 검토하였으며 스크루 오거를 통해 배출되는 토사량에 대해서는 각각 단위 시간당 배토량과 누적 배토량을 검토하였다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :4
  • Pages :163-176
  • Received Date : 2017-11-19
  • Revised Date : 2017-12-14
  • Accepted Date : 2017-12-18
  • DOI :https://doi.org/10.12814/jkgss.2017.16.4.163
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