Geomechanics and Engineering

  • 제21권2호
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  • Pages.215-226
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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An investigation on tunnel deformation behavior of expressway tunnels

  • Chen, Shong-Loong (Department of Civil Engineering, National Taipei University of Technology) ;
  • Lee, Shen-Chung (Department of Civil Engineering, National Taipei University of Technology)
  • 투고 : 2019.12.11
  • 심사 : 2020.03.02
  • 발행 : 2020.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

The magnitude and distribution of tunnel deformation were widely discussed topics in tunnel engineering. In this paper, a three-dimensional (3D) finite element program was used for the analysis of various horseshoe-shaped opening expressway tunnels under different geologies. Two rock material models - Mohr-Coulomb and Hoek-Brown were executed in the process of analyses; and the results show that the magnitude and distribution of tunnel deformation were close by these two models. The tunnel deformation behaviors were relevant to many factors such as cross-sections and geological conditions; but the geology was the major factor to the normalized longitudinal deformation profile (LDP). If the time-dependent factors were neglected, the maximum displacements were located at the distance of 3 to 4 tunnel diameters behind the excavation face. The ratios of displacement at the excavation face to the maximum displacement were around 1/3 to 1/2. In general, the weaker the rock mass, the larger the ratio. The displacements in front of the excavation face were decreased with the increasement of distance. At the distance of 1.0 to 1.5 tunnel diameter, the displacements were reduced to one-tenth of the maximum displacement.

키워드

참고문헌

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피인용 문헌

  1. Hoek-Brown failure criterion for damage analysis of tunnels subjected to blast load vol.26, pp.1, 2021, https://doi.org/10.12989/gae.2021.26.1.041