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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic stability of a mountain tunnel portal section lining
This paper presents an analytical solution of the fortification length in tunnel portal section lining, which has been performed under seismic circumstance, to instigate the factors influencing on the stability of the tunnel lining structure. Analyses have been carried out by the analytical method to study that the tunnel depth, shear wave velocity and incident angle have significant influence on the stress of the tunnel portal section lining. The analytical solution is verified by the three-dimensional finite difference element methods. The numerical results show that the stability of the tunnel portal section lining can perform worse than other parts of tunnel lining structure, and the rock mass rating has also an important influence on the stability of the tunnel portal section lining. Both analytical solution and numerical results indicated that the seismic fortification length of tunnel portal section is determined to be not more than 3 times of tunnel span. It has been seen that the strength of the seismic fortification length of tunnel portal section lining must be highlighted. This study will provide a theoretical basis for the design of the seismic fortification length of tunnel lining.
Seismic stability of a mountain tunnel portal section lining
This paper presents an analytical solution of the fortification length in tunnel portal section lining, which has been performed under seismic circumstance, to instigate the factors influencing on the stability of the tunnel lining structure. Analyses have been carried out by the analytical method to study that the tunnel depth, shear wave velocity and incident angle have significant influence on the stress of the tunnel portal section lining. The analytical solution is verified by the three-dimensional finite difference element methods. The numerical results show that the stability of the tunnel portal section lining can perform worse than other parts of tunnel lining structure, and the rock mass rating has also an important influence on the stability of the tunnel portal section lining. Both analytical solution and numerical results indicated that the seismic fortification length of tunnel portal section is determined to be not more than 3 times of tunnel span. It has been seen that the strength of the seismic fortification length of tunnel portal section lining must be highlighted. This study will provide a theoretical basis for the design of the seismic fortification length of tunnel lining.
Seismic stability of a mountain tunnel portal section lining
Junwei, Zhang (Autor:in) / Wan, Yang (Autor:in) / Chenling, Zhao (Autor:in) / Tuo, Chen (Autor:in)
International Journal of Geotechnical Engineering ; 14 ; 376-394
18.05.2020
19 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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