Geomechanics and Engineering

  • 제34권1호
  • /
  • Pages.69-86
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  • 2023
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A secondary development based on the Hoek-Brown criterion for rapid numerical simulation prediction of mountainous tunnels in China

  • Jian Zhou (Department of Civil Engineering, Hangzhou City University) ;
  • Xinan Yang (The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University) ;
  • Zhi Ding (Department of Civil Engineering, Hangzhou City University)
  • 투고 : 2022.11.14
  • 심사 : 2023.05.16
  • 발행 : 2023.07.10
⟨ 이전 논문 다음 논문 ⟩

초록

To overcome the dilemma of the [BQ] method's inability to predict mountain tunnel support loads, this study is based on the Hoek-Brown criterion and previous results to obtain the connection equations from GSI scores to each parameter of the Hoek-Brown criterion and the link between the [BQ] scores and the GSI system. The equations were embedded in the Hoek-Brown criterion of FLAC6.0 software to obtain tunnel construction forecasts without destroying the in-situ stratigraphy. The feasibility of the secondary development of the Hoek-Brown criterion was verified through comparative analysis with field engineering measurements. If GSI > 45 with a confining pressure of less than 10 MPa, GSI has little effect on the critical softening factor while we should pay attention to the parameter of confining pressure when GSI < 45. The design values for each parameter are closer to the FLAC3D simulation results and the secondary development of the Hoek-Brown criterion meets the design objectives. If the Class V surrounding rock is thinned with shotcrete or the secondary lining is installed earlier, the secondary lining may act as the main load-bearing structure. The study may provide ideas for rapid prediction of mountainous tunnels in China.

키워드

과제정보

The authors acknowledge the Scientific Research Project of Zhejiang Provincial Transportation Department (2021050) for the preparation of this manuscript. This financial support is greatly appreciated.

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