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- W4311804879 abstract "Tunnel face stability is critical for tunneling safety, especially in constructing a tunnel adjacent to another. In tunnel construction, if there is an adjacent existing tunnel and the active failure of the tunnel face happens, there will be severe consequences. Therefore, the active stability of shield tunnel face should be studied considering existing tunnels nearby. In this work, a series of transparent clay model tests were conducted to investigate the active stability of a shield tunnel face adjacent to an existing tunnel based on the development process, failure mode, influence range and support force. In addition, discrete element method was used to study the shield tunnel face stability under various conditions. The role of existing tunnels on the shield tunnel face stability was discussed. The failure mode of the shield tunnel face is an overall failure mode and similar to a wedge shape and ladder shape along the longitudinal and transverse section, respectively. The critical support force ratio is approximately 4.5%. The relative vertical and horizontal distance have significant influences on failure mode, while the influence of burial depth and overlapping angles are not significant." @default.
- W4311804879 created "2022-12-28" @default.
- W4311804879 creator A5035530788 @default.
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- W4311804879 date "2023-06-01" @default.
- W4311804879 modified "2023-10-16" @default.
- W4311804879 title "Active stability of the shield tunneling face crossing an adjacent existing tunnel: transparent clay model test and DEM simulation" @default.
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- W4311804879 doi "https://doi.org/10.1139/cgj-2022-0294" @default.
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