Journal
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
Volume 51, Issue -, Pages 164-174Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tust.2015.10.042
Keywords
Creep model; Internal state variables; FLAC(3D); Long-term stability; Tunnels
Funding
- National Basic Research Program of China [2015CB057904]
- National Natural Science Foundation of China [11172150, 51479097]
- State key Laboratory of Hydroscience and Engineering [2013-KY-2]
Ask authors/readers for more resources
The creep model based on thermodynamics with internal state variables theory can simulate complex time-dependent deformation of rock mass, describe process of energy dissipation of material system, and can be used to evaluate the long-term stability of underground structures quantitatively. In this paper, the creep model proposed by author is improved further and recast to be central difference equation. The redevelopment interface of FLAC(3D) is used to develop a new calculation program, which is based on thermodynamics for vsico-plasticity (PTV-P). Program validation has been conducted by comparing the results from FLAC(3D) and Matlab software under uniaxial compression condition. Then the developed program has been applied to analyze the time-dependent behavior of deep-buried double tunnels. The integral values of energy dissipation rate and its time derivative in domain can be calculated and are used to evaluate the long-term stability of tunnels quantitatively, and the evaluation criterion is also proposed. Moreover, the contour map of energy dissipation rate is used to exhibits the local non-equilibrium region clearly. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available