Details
| Original language | English |
|---|---|
| Pages (from-to) | 1199-1216 |
| Number of pages | 18 |
| Journal | International Journal for Numerical and Analytical Methods in Geomechanics |
| Volume | 42 |
| Issue number | 11 |
| Early online date | 25 Apr 2018 |
| Publication status | Published - 2 Jul 2018 |
Abstract
For tunnel constructed by New Austrian Tunnelling Method, the crown is the upper part of tunnel section, constructed during excavation process and supported by shotcrete. The stability of the crown has great influence on the safety of tunnel itself and the buildings above, which correlates, among others, with geometrical setup of tunnel and material properties of shotcrete and soil/rock. In this paper, aiming at analyzing the stability of shotcrete supported crown, a recently presented numerical method discontinuity layout optimization is adopted, which introduces a great amount of potential discontinuities cross over one another and provides a wide search space for efficient upper limit analysis. In the analysis, a well-established hydration model of cementitious material is implemented for accounting the hydration of shotcrete. Then assumptions based on convergence-confinement method are used for accounting the 3-dimensional effect in 2-dimensional analysis, finally providing time-space–dependent assessments of stability of shotcrete supported crown.
Keywords
- discontinuity layout optimization (DLO), factor of safety, failure mechanism, Mohr-Coulomb failure criteria, stability analysis
ASJC Scopus subject areas
- Engineering(all)
- Computational Mechanics
- Materials Science(all)
- General Materials Science
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Engineering(all)
- Mechanics of Materials
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In: International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 42, No. 11, 02.07.2018, p. 1199-1216.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Stability analysis of shotcrete supported crown of NATM tunnels with discontinuity layout optimization
AU - Zhang, Yiming
AU - Zhuang, Xiaoying
AU - Lackner, Roman
N1 - Publisher Copyright: Copyright © 2018 John Wiley & Sons, Ltd. Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/7/2
Y1 - 2018/7/2
N2 - For tunnel constructed by New Austrian Tunnelling Method, the crown is the upper part of tunnel section, constructed during excavation process and supported by shotcrete. The stability of the crown has great influence on the safety of tunnel itself and the buildings above, which correlates, among others, with geometrical setup of tunnel and material properties of shotcrete and soil/rock. In this paper, aiming at analyzing the stability of shotcrete supported crown, a recently presented numerical method discontinuity layout optimization is adopted, which introduces a great amount of potential discontinuities cross over one another and provides a wide search space for efficient upper limit analysis. In the analysis, a well-established hydration model of cementitious material is implemented for accounting the hydration of shotcrete. Then assumptions based on convergence-confinement method are used for accounting the 3-dimensional effect in 2-dimensional analysis, finally providing time-space–dependent assessments of stability of shotcrete supported crown.
AB - For tunnel constructed by New Austrian Tunnelling Method, the crown is the upper part of tunnel section, constructed during excavation process and supported by shotcrete. The stability of the crown has great influence on the safety of tunnel itself and the buildings above, which correlates, among others, with geometrical setup of tunnel and material properties of shotcrete and soil/rock. In this paper, aiming at analyzing the stability of shotcrete supported crown, a recently presented numerical method discontinuity layout optimization is adopted, which introduces a great amount of potential discontinuities cross over one another and provides a wide search space for efficient upper limit analysis. In the analysis, a well-established hydration model of cementitious material is implemented for accounting the hydration of shotcrete. Then assumptions based on convergence-confinement method are used for accounting the 3-dimensional effect in 2-dimensional analysis, finally providing time-space–dependent assessments of stability of shotcrete supported crown.
KW - discontinuity layout optimization (DLO)
KW - factor of safety
KW - failure mechanism
KW - Mohr-Coulomb failure criteria
KW - stability analysis
UR - http://www.scopus.com/inward/record.url?scp=85045910031&partnerID=8YFLogxK
U2 - 10.1002/nag.2775
DO - 10.1002/nag.2775
M3 - Article
AN - SCOPUS:85045910031
VL - 42
SP - 1199
EP - 1216
JO - International Journal for Numerical and Analytical Methods in Geomechanics
JF - International Journal for Numerical and Analytical Methods in Geomechanics
SN - 0363-9061
IS - 11
ER -