Professor Ashraf Osman ashraf.osman@durham.ac.uk
Professor
Stability of unlined twin tunnels in undrained clay
Osman, A.S.
Authors
Abstract
This note presents solutions for the problem of the stability of twin tunnels excavation in soft ground. A compatible displacement field has been derived to idealise ground deformations around shallow, unlined, twin tunnels embedded within an undrained clay layer.Within the boundaries of this displacement field, the soil is required to shear compatibly and continuously with no relative sliding at the boundaries. Upper bounds on the loads required to resist collapse are derived and presented in the form of dimensionless stability graphs that account for the variation of shear strength with depth, the embedded depth of tunnels, and spacing between tunnels.
Citation
Osman, A. (2010). Stability of unlined twin tunnels in undrained clay. Tunnelling and Underground Space Technology, 25(3), 290-296. https://doi.org/10.1016/j.tust.2010.01.004
Journal Article Type | Article |
---|---|
Publication Date | May 1, 2010 |
Deposit Date | Jan 13, 2016 |
Journal | Tunnelling and Underground Space Technology |
Print ISSN | 0886-7798 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 25 |
Issue | 3 |
Pages | 290-296 |
DOI | https://doi.org/10.1016/j.tust.2010.01.004 |
Keywords | Tunnels, Undrained clay, Stability, Upper bound limit analysis, Design |
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