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- W4386826032 abstract "Tunnel face stability has received increasing research interest over the past few decades. However, computing time-efficient and safe three-dimensional solutions under seismic loading is still an unsolved problem, while case studies indicate that seismic loading can be one critical destabilizing factor affecting tunnel stability. The primary objective of this work is to fill this gap in knowledge by providing compromising and computationally efficient solutions, along with their respective lower and upper bounds, to compute face stability under seismic conditions. The analyses employ the finite element limit analysis method to evaluate the limit support pressure in undrained clay, considering horizontal pseudo-static seismic forces pointing outwards from the face. Moreover, the analyses employ both constant and linearly increasing shear strengths with depth. The results are summarized as dimensionless stability charts and tables to facilitate their interpretation and future use for tunnel design. A new design equation has been developed to evaluate the stability of the tunnel face considering the effect of seismic forces. Additionally, the effects of different parameters on the shape of the failure mechanism have been investigated by analysing the distribution of shear dissipation." @default.
- W4386826032 created "2023-09-19" @default.
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- W4386826032 date "2023-09-01" @default.
- W4386826032 modified "2023-10-18" @default.
- W4386826032 title "Three-dimensional seismic face stability of shield tunnels in undrained clay" @default.
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- W4386826032 doi "https://doi.org/10.1016/j.undsp.2023.08.007" @default.
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