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| Viscoelastic analysis of the stress and displacement in tunnel surrounding rock and support during the process of tunnel construction |
| Li Zhida |
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Abstract In this paper, combined with the design and construction of a tunnel, and using viscoelasticity, time-dependence stress and displacement in tunnel surrounding rock and support have been studied. Firstly, to stress analysis of the surrounding rock and support as a boundary value problem with the initial stress under the action of the displacement in the tunnel surrounding rock after tunnel excavation, the time-dependence stress and displacement in tunnel surrounding rock and support have been derived, these depend on the interaction between tunnel surrounding rock and support. Then, the interaction between tunnel surrounding and support has been derived by compatibility of deformation, the interaction is not only dependence on material property and size of tunnel surrounding and support, but also the time of making supports. Finally, combined with the design and construction of a special tunnel, and using the time-dependence stress in this paper, the stress release of the tunnel surrounding rock and load distribution ratio and the stress in support have been calculated, and the displacement and stress in the second lining under different load distribution ratio have been given. These can be provided a reference for the construction and design of the tunnel.
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Received: 18 September 2012
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Corresponding Authors:
Li Zhida
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2013, Vol. 34 
