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- W3176461318 endingPage "104312" @default.
- W3176461318 startingPage "104312" @default.
- W3176461318 abstract "Tunneling induced excess pore water pressure (EPWP) is crucial to face stability, time-dependent ground deformation and structural performance of tunnel lining. This paper numerically investigates the short-term spatial–temporal distribution of EPWP induced by large diameter slurry shield tunneling in saturated soils. A refined 3D finite element model is developed to consider the construction process including tunnel advance, segment installation, tail void grouting and grout material hardening. The commonly neglected shield conicity is fully considered in the refined modelling. The proposed fluid–solid coupled numerical model is well validated by the field monitoring data of Shanghai Yangtze River Tunnel after considering shield conicity. Temporal distribution of EPWP is equivalent to a certain spatial distribution in the longitudinal direction. Longitudinal distribution of EPWP is separated into five parts (Δua ~ Δue) induced by different construction process. The fives of EPWP are largely influenced by shield conicity induced overcut, soil compressibility, grouting pressure and tunnel diameter. The distribution of EPWP ahead of tunnel face is mainly determined by slurry support pressure and is hardly influenced by other factors." @default.
- W3176461318 created "2021-07-05" @default.
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- W3176461318 date "2021-09-01" @default.
- W3176461318 modified "2023-10-17" @default.
- W3176461318 title "Refined 3D modelling of spatial-temporal distribution of excess pore water pressure induced by large diameter slurry shield tunneling" @default.
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- W3176461318 doi "https://doi.org/10.1016/j.compgeo.2021.104312" @default.
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