Geomechanics and Engineering

  • 제16권6호
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  • Pages.569-575
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

3D stability of shallow cavity roof with arbitrary profile under influence of pore water pressure

  • Luo, W.J. (School of Civil Engineering and Architecture, East China Jiaotong University) ;
  • Yang, X.L. (School of Civil Engineering, Central South University)
  • 투고 : 2018.04.22
  • 심사 : 2018.10.11
  • 발행 : 2018.12.30
⟨ 이전 논문 다음 논문 ⟩

초록

The stability of shallow cavities with an arbitrary profile is a difficult issue in geotechnical engineering. This paper investigates this problem on the basis of the upper bound theorem of limit analysis and the Hoek-Brown failure criterion. The influence of pore pressure is taken into consideration by regarding it as an external force acting on rock skeleton. An objective function is constructed by equating the internal energy dissipation to the external force work. Then the Lagrange variation approach is used to solve this function. The validity of the proposed method is demonstrated by comparing the analytical solutions with the published research. The relations between shallow and deep cavity are revealed as well. The detaching curve of cavity roof with elliptical profile is obtained. In order to facilitate the application of engineering practice, the numerical results are tabulated, which play an important role in tunnel design and stability analysis of roof. The influential factors on potential collapse are taken into consideration. From the results, the impact of various factors on the extent of detaching is seen intuitively.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation

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피인용 문헌

  1. Influences of Saturation and Wetting-Drying Cycle on Mechanical Performances of Argillaceous Limestones from Liupanshan Tunnel, China vol.2019, pp.None, 2018, https://doi.org/10.1155/2019/9236172
  2. 3D Rotational Failure Mechanism of Tunnel Face in Weathered and Saturated Hoek-Brown Rock Masses vol.23, pp.6, 2019, https://doi.org/10.1007/s12205-019-1048-4