Geomechanics and Engineering

  • 제15권3호
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  • Pages.823-831
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Critical face pressure and backfill pressure in shield TBM tunneling on soft ground

  • Kim, Kiseok (Department of Civil and Environmental Engineering, University of Illinois) ;
  • Oh, Juyoung (Samsung C&T Corporation) ;
  • Lee, Hyobum (School of Civil, Environmental and Architectural Civil Engineering, Korea University) ;
  • Kim, Dongku (School of Civil, Environmental and Architectural Civil Engineering, Korea University) ;
  • Choi, Hangseok (School of Civil, Environmental and Architectural Civil Engineering, Korea University)
  • 투고 : 2017.05.08
  • 심사 : 2018.03.23
  • 발행 : 2018.06.30
⟨ 이전 논문 다음 논문 ⟩

초록

The most important issue during shield TBM tunneling in soft ground formations is to appropriately control ground surface settlement. Among various operational conditions in shield TBM tunneling, the face pressure and backfill pressure should be the most important and immediate measure to restrain surface settlement during excavation. In this paper, a 3-D hydro-mechanical coupled FE model is developed to numerically simulate the entire process of shield TBM tunneling, which is verified by comparing with real field measurements of ground surface settlement. The effect of permeability and stiffness of ground formations on tunneling-induced surface settlement was discussed in the parametric study. An increase in the face pressure and backfill pressure does not always lead to a decrease in surface settlement, but there are the critical face pressure and backfill pressure. In addition, considering the relatively low permeability of ground formations, the surface settlement consists of two parts, i.e., immediate settlement and consolidation settlement, which shows a distinct settlement behavior to each other.

키워드

과제정보

연구 과제 주관 기관 : Korea Agency for Infrastructure Technology Advancement

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피인용 문헌

  1. Ground Settlement of High-Permeability Sand Layer Induced by Shield Tunneling: A Case Study under the Guidance of DBN vol.2020, pp.None, 2018, https://doi.org/10.1155/2020/6617468
  2. 개별요소법과 유한차분법 연계 해석을 이용한 EPB TBM 굴진해석 Part I : 모델링 vol.30, pp.5, 2018, https://doi.org/10.7474/tus.2020.30.5.484
  3. 개별요소법과 유한차분법 연계 해석을 이용한 EPB TBM 굴진해석 Part II: 매개변수 해석 vol.30, pp.5, 2020, https://doi.org/10.7474/tus.2020.30.5.496
  4. Numerical Simulation of EPB Shield Tunnelling with TBM Operational Condition Control Using Coupled DEM-FDM vol.11, pp.6, 2018, https://doi.org/10.3390/app11062551
  5. Three-dimensional finite element analysis of urban rock tunnel under static loading condition: Effect of the rock weathering vol.25, pp.2, 2018, https://doi.org/10.12989/gae.2021.25.2.099