[Home ] [Archive]   [ فارسی ]  
:: Main About Current Issue Archive Search Submit Contact ::
:: Volume 7, Issue 2 (3-2014) ::
2014, 7(2): 1787-1810 Back to browse issues page
Face Stability Analysis of Tunnel (A case study: Karaj Subway Line 2 )
P Headarian *, S. M. Fatemi Aghda, Ali Noorzad
Abstract:   (10076 Views)
Tunneling in complex geological and geotechnical conditions is often inevitable, especially in urban areas. The stability analysis and the assessment of ground surface settlement of a shield tunneling are of major importance in real shield tunneling projects. The objective of this research is to determine the collapse pressure of a shallow circular tunnel driven by a Tunnel Boring Machine (TBM) of the Earth Pressure Balance (EPB) type.  In this study, analytical methods and three-dimensional numerical modeling with ABAQUS software were implemented to examine the effect of face pressure on the behavior of the tunnel. The parameters were calculated using data from Karaj subway-line 2 as a case study. The analytical method used in this study is Leca-Dormiex which is based on limit analysis theory.  The method is based on a translational multiblock failure mechanism.  Also, elastic and Mohr-Coulomb constitutive model have been used for soil behavior. The results of analytical method and numerical modeling were then compared. Based on the obtained results, face pressure assessed from the analytical method of Leca-Dormiex (upper bound) is the minimum pressure that can be implemented on the face tunnel. It also indicates that with implementation of suggested pressure of analytical method, Karaj subway face tunnel is stable and consequently execution of pre-consolidation methods in this section of the tunnel does not seem to be necessary
Keywords: face tunnel, upper bound, method numerical, method analytical, face displacement, Karaj subway-line2, ABAQUS
Full-Text [PDF 1294 kb]   (2652 Downloads)    
Type of Study: s | Subject: En. Geology
Accepted: 2016/10/5 | Published: 2016/10/5
Add your comments about this article
Your username or Email:

CAPTCHA


XML   Persian Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Headarian P, Fatemi Aghda S M, Noorzad A. Face Stability Analysis of Tunnel (A case study: Karaj Subway Line 2 ). Journal of Engineering Geology. 2014; 7 (2) :1787-1810
URL: http://jeg.khu.ac.ir/article-1-422-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 7, Issue 2 (3-2014) Back to browse issues page
نشریه زمین شناسی مهندسی Journal of Engineering Geology
Persian site map - English site map - Created in 0.07 seconds with 30 queries by YEKTAWEB 4419