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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Tunnel Stability against Uplift Single Fluid Grout
verfasst von : Fangqin Yang, Jiaxiang Lin, Yong Yuan, Chunlong Yu
Erschienen in: Computational Structural Engineering
Verlag: Springer Netherlands
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During shield tunnelling, as segments are cleared off by the shield, annular void occurs between shield tail inner side and lining outer side. The void must be back-filled with grout subsidence to ensure compacted filling, the grout subsidence caused the tunnel uplift. This paper studies the relationship between early strength of grout subsidence and tunnel stability upon shield tunneling. Influence of the rate of tunneling on tunnel stability against uplift is also studied. A longitudinal and transverse calculation model is established to investigate tunnel uplift, which results in grout strength increase. In analysis, safety criteria of structural lining are verified. Finally, relevant construction technological measures are suggested against tunnel uplift for shield tunneling.