Laver, RG and Soga, K (2012) Numerical simulation of long-term twin-tunnel behaviour at St James's park. In: UNSPECIFIED pp. 395-402..Full text not available from this repository.
The twin-tunnel construction of the Jubilee Line Extension tunnels beneath St James's Park was simulated using coupled-consolidation finite-element analyses. The effect of defining different permeabilities for the final consolidation stage was investigated, and the performance of a fissure softening model was also evaluated. The analyses suggested an unexpectedly high permeability anisotropy for soil around the tunnel crown, possibly due to stress-induced permeability changes, or low-permeability laminations. Also, the permeability profile and lining conductivity were found to differ between the tunnels. Inclusion of the fissure model gave a narrower settlement trough, more alike that in the field, by preferentially softening simple shear behaviour. Long-term settlements at the site continue to increase at an unexpectedly high rate, suggesting the possibility of creep or unexpected soil softening during excavation. © 2012 Taylor & Francis Group.
|Item Type:||Conference or Workshop Item (UNSPECIFIED)|
|Divisions:||Div D > Geotechnical and Environmental|
|Depositing User:||Unnamed user with email email@example.com|
|Date Deposited:||16 Jul 2015 14:09|
|Last Modified:||28 Nov 2015 08:39|