3D numerical analysis of the interaction between the Jubilee and Northern Line tunnels at Waterloo
3D numerical analysis of the interaction between the Jubilee and Northern Line tunnels at Waterloo
A competent 3D numerical analysis is required for the detailed assessment of the potential damage of existing tunnels resulting from new tunnel construction. However, few case studies, particularly in London Clay, have been considered in the literature and the validity of 3D numerical analyses for the interaction between new and existing tunnels is yet to be established. In this paper, the construction of the Jubilee Line twin tunnels beneath the existing Northern Line tunnels at Waterloo is simulated numerically. A parametric study has been carried out to investigate the role of K0 in modelling perpendicular twin tunnel interaction, considering both high and reduced K0 conditions, with comparisons made against the empirical framework. To account for the presence of the joints, the existing tunnels adopted a reduced anisotropic lining stiffness. The numerical results were in good agreement with settlement measurements taken along the invert of the existing tunnels, with estimates being more accurate than the empirical framework.
M. A. Stewart; Agustin Ruiz Lopez; Aikaterini Tsiampousi
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
10. Tunnelling and mining applications
https://doi.org/10.53243/NUMGE2023-321
Contact Information
- Secretary General - Dr A M McNamara
- Email: [email protected]
- Phone: +44 20 7040 8154
- City, University of London
- Northampton Square
- London EC1V 0HB. United Kingdom