Stability assessment of tunnel face in a layered soil using upper bound theorem of limit analysis

Khezri, N; Mohamad, H; Fatahi, B

Stability assessment of tunnel face in a layered soil using upper bound theorem of limit analysis

Khezri, N Mohamad, H Fatahi, B

Permalink

Publication Type:: Journal Article
Citation:: Geomechanics and Engineering, 2016, 11 (4), pp. 471 - 492
Issue Date:: 2016-10-01

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download Published VersionAdobe PDF (1.89 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Khezri, N	en_US
dc.contributor.author	Mohamad, H	en_US
dc.contributor.author	Fatahi, B https://orcid.org/0000-0002-7920-6946	en_US
dc.date.available	2020-05-25T19:16:53Z
dc.date.issued	2016-10-01	en_US
dc.identifier.citation	Geomechanics and Engineering, 2016, 11 (4), pp. 471 - 492	en_US
dc.identifier.issn	2005-307X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/53606
dc.description.abstract	© 2016 Techno-Press, Ltd. Underground tunnelling is one of the sustainable construction methods which can facilitate the increasing passenger transportation in the urban areas and benefit the community in the long term. Tunnelling in various ground conditions requires careful consideration of the stability factor. This paper investigates three dimensional stability of a shallow circular tunnel in a layered soil. Upper bound theorem of limit analysis was utilised to solve the tunnel face stability problem. A three dimensional kinematic admissible failure mechanism was improved to model a layered soil and limiting assumptions of the previous studies were resolved. The study includes calculation of the minimum support pressure acting on the face of the excavation in closed-face excavations. The effects of the characteristics of the layers on the minimum support pressure were examined. It was found that the ratio of the thickness of cover layers particularly when a weak layer is overlying a stronger layer, has the most significant influence on the minimum tunnel support pressure. Comparisons have been made with the results of the numerical modelling using FLAC3D software. Results of the current study were in a remarkable agreement with those of numerical modelling.	en_US
dc.relation.ispartof	Geomechanics and Engineering	en_US
dc.relation.isbasedon	10.12989/gae.2016.11.4.471	en_US
dc.title	Stability assessment of tunnel face in a layered soil using upper bound theorem of limit analysis	en_US
dc.type	Journal Article
utslib.citation.volume	4	en_US
utslib.citation.volume	11	en_US
utslib.for	0905 Civil Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	open_access
pubs.issue	4	en_US
pubs.publication-status	Published	en_US
pubs.volume	11	en_US

Abstract:

© 2016 Techno-Press, Ltd. Underground tunnelling is one of the sustainable construction methods which can facilitate the increasing passenger transportation in the urban areas and benefit the community in the long term. Tunnelling in various ground conditions requires careful consideration of the stability factor. This paper investigates three dimensional stability of a shallow circular tunnel in a layered soil. Upper bound theorem of limit analysis was utilised to solve the tunnel face stability problem. A three dimensional kinematic admissible failure mechanism was improved to model a layered soil and limiting assumptions of the previous studies were resolved. The study includes calculation of the minimum support pressure acting on the face of the excavation in closed-face excavations. The effects of the characteristics of the layers on the minimum support pressure were examined. It was found that the ratio of the thickness of cover layers particularly when a weak layer is overlying a stronger layer, has the most significant influence on the minimum tunnel support pressure. Comparisons have been made with the results of the numerical modelling using FLAC3D software. Results of the current study were in a remarkable agreement with those of numerical modelling.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/53606