The dynamic interaction of twin tunnels embedded in a homogeneous half-space
The dynamic interaction of twin tunnels embedded in a homogeneous half-space
Vibration generated by underground railways can be a major source of disturbance to occupants of nearby buildings. The numerical prediction of ground-borne vibration is a complicated problem that has received extensive research attention in the past decades. However, simplifying assumptions are always required in state-of-the-art numerical models in order to reduce computational effort and resources. A common simplifying assumption is to neglect the presence of a neighbouring tunnel, despite the fact that many underground railway lines around the world consist of two tunnels. This paper investigates the dynamic interaction of two parallel tunnels embedded in a homogeneous half-space. Two different methods are used to tackle the problem. The first is a fully coupled approach, where two cavities are generated in the halfspace to which the tunnels are coupled. The second adopts a superposition approach, where two sub-models each consisting of a single tunnel are superposed to calculate the vibration response of the twin tunnels. In both modelling approaches, the tunnel wall is modelled using the thick-shell theory, while the boundary element method is used to simulate the half-space of the ground. The vibration response of the twin-tunnel system on the ground surface due to a harmonic point load at one tunnel invert is studied and compared to that of a single tunnel. The efficacy of the superposition method in modelling the dynamic interaction of the twin tunnels is assessed against the fully coupled approach at different points on the surface. The results reveal the significance of the interaction between the twin tunnels and also demonstrate the accuracy of the superposition method. The feasibility of the superposition method in modelling the dynamic interaction between tunnels and piled-foundations is also highlighted.
railway, ground-borne vibration, soil-structure interaction, twin tunnels
Hamad, Waleed I.
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Hunt, Hugh E.M.
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Talbot, James P.
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Hussein, Mohammed F.M.
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Thompson, David J.
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May 2015
Hamad, Waleed I.
0a480d1e-7f1f-48b7-a3f1-668826e39b6c
Hunt, Hugh E.M.
5da5953f-aeb6-4af6-bb80-1b9f84ba2ddf
Talbot, James P.
060b672f-edf9-405d-aca3-a4a9db79790a
Hussein, Mohammed F.M.
5a0b49af-1ef1-46f4-8e25-aa87162216c4
Thompson, David J.
bca37fd3-d692-4779-b663-5916b01edae5
Hamad, Waleed I., Hunt, Hugh E.M., Talbot, James P., Hussein, Mohammed F.M. and Thompson, David J.
(2015)
The dynamic interaction of twin tunnels embedded in a homogeneous half-space.
COMPDYN 2015, Crete, Greece.
25 - 27 May 2015.
13 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Vibration generated by underground railways can be a major source of disturbance to occupants of nearby buildings. The numerical prediction of ground-borne vibration is a complicated problem that has received extensive research attention in the past decades. However, simplifying assumptions are always required in state-of-the-art numerical models in order to reduce computational effort and resources. A common simplifying assumption is to neglect the presence of a neighbouring tunnel, despite the fact that many underground railway lines around the world consist of two tunnels. This paper investigates the dynamic interaction of two parallel tunnels embedded in a homogeneous half-space. Two different methods are used to tackle the problem. The first is a fully coupled approach, where two cavities are generated in the halfspace to which the tunnels are coupled. The second adopts a superposition approach, where two sub-models each consisting of a single tunnel are superposed to calculate the vibration response of the twin tunnels. In both modelling approaches, the tunnel wall is modelled using the thick-shell theory, while the boundary element method is used to simulate the half-space of the ground. The vibration response of the twin-tunnel system on the ground surface due to a harmonic point load at one tunnel invert is studied and compared to that of a single tunnel. The efficacy of the superposition method in modelling the dynamic interaction of the twin tunnels is assessed against the fully coupled approach at different points on the surface. The results reveal the significance of the interaction between the twin tunnels and also demonstrate the accuracy of the superposition method. The feasibility of the superposition method in modelling the dynamic interaction between tunnels and piled-foundations is also highlighted.
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Published date: May 2015
Venue - Dates:
COMPDYN 2015, Crete, Greece, 2015-05-25 - 2015-05-27
Keywords:
railway, ground-borne vibration, soil-structure interaction, twin tunnels
Organisations:
Dynamics Group
Identifiers
Local EPrints ID: 388634
URI: http://eprints.soton.ac.uk/id/eprint/388634
PURE UUID: a4a87952-83f1-468d-9bf1-7134a308d835
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Date deposited: 02 Mar 2016 15:18
Last modified: 15 Mar 2024 02:53
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Contributors
Author:
Waleed I. Hamad
Author:
Hugh E.M. Hunt
Author:
James P. Talbot
Author:
Mohammed F.M. Hussein
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