Geomechanics and Engineering

  • 제27권2호
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  • Pages.151-165
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  • 2021
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR Code

Comparative effects of adjacent loaded pile row on existing tunnel by 2D and 3D simulation models

  • Heama, Narunat (Department of Civil Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang) ;
  • Jongpradist, Pornkasem (Construction Innovations and Future Infrastructures Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi) ;
  • Lueprasert, Prateep (Department of Civil Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang) ;
  • Suwansawat, Suchatvee (Department of Civil Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang) ;
  • Jamsawang, Pitthaya (Soil Engineering Research Center, Department of Civil Engineering, King Mongkut's University of Technology North Bangkok)
  • 투고 : 2021.03.11
  • 심사 : 2021.10.06
  • 발행 : 2021.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

Selecting suitable simulation methods for complex problems requires a careful balance between the predicted accuracy and computational effort. This research comparatively investigated the effects of adjacent loaded pile row on an existing tunnel in terms of tunnel deformation and lining force, displacement of soil surrounding between tunnel and pile and load transfer of the pile. Simulations were carried out by eight simulation models consisting of 3D finite element (FE) full models (model 1-2); 3D FE symmetry models (model 3-4); and a pile wall in 2D FE models (models 5-8). In loaded pile row simulation, simulations were performed with two pile types: volume pile and embedded pile. In 2D simulation, the 3D pile row was converted into 2D pile wall under plane strain condition by using three transformation methods. The results show that the predicted tunnel responses are adequately accurate as long as the reasonable soil movement behavior can be reproduced. The 2D equivalent dimensions and 2D equivalent axial rigidity are recommended since they provide conservative estimation on both tunnel deformation and lining forces. The 2D equivalent flexural rigidity is not recommended if the pile response is also of concern. The novelty of this research lies in the use and discussion on the applicability of various 2D and 3D models to simulate the effects of adjacent loaded pile row on the existing tunnel, as opposed to previous studies which focused on one or two simulation models.

키워드

과제정보

The authors gratefully acknowledge financial support by the 1D2 Group Co. Ltd., Thailand Research Fund (TRF) and King Mongkut's Institute of Technology Ladkrabang through Grant PHD60I0032 and Grant KREF035001. The support from National Research Council of Thailand (NRCT) and King Mongkut's university of Technology Thonburi under Contract no. NRCT5-RSA63006 and Thailand Science Research and Innovation (TSRI) under Fundamental Fund 2022 (Project: Advanced Construction Towards Thailand 4.0) are also acknowledged.

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