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Dynamic Response and Long-Term Settlement of Four Overlapping Tunnels Subject to Train Load
With continued development of urban rail transit networks, the quantity of overlapping metro tunnels is increasing. Long-term service performance of the tunnel structure can be threatened a lot by complicated dynamic response of tunnel–ground system under train load, especially in the overlapping cases. Based on a case of four overlapping tunnels in soft clay region, dynamic response of the tunnel–ground system and long-term settlement of the tunnels are investigated with finite element method (FEM) and empirical method. It is shown that, maximum acceleration and dynamic principal stress of the lining in overlapping zone are 48.2% and 19.8%, respectively, larger than that in non-overlapping zone. The ten-year accumulation settlement of the tunnel in overlapping zone is 173.7% larger than that in non-overlapping zone. Uneven settlement occurs in the overlapping zone, and the radius of curvature of the tunnel (12,461 m) exceeds the requirements of the specification (15,000 m). Grouted reinforcement can control the uneven settlement well. Radius of curvature of the tunnel can be refined to 33,967 m, which meets the requirements of the specification.
Dynamic Response and Long-Term Settlement of Four Overlapping Tunnels Subject to Train Load
With continued development of urban rail transit networks, the quantity of overlapping metro tunnels is increasing. Long-term service performance of the tunnel structure can be threatened a lot by complicated dynamic response of tunnel–ground system under train load, especially in the overlapping cases. Based on a case of four overlapping tunnels in soft clay region, dynamic response of the tunnel–ground system and long-term settlement of the tunnels are investigated with finite element method (FEM) and empirical method. It is shown that, maximum acceleration and dynamic principal stress of the lining in overlapping zone are 48.2% and 19.8%, respectively, larger than that in non-overlapping zone. The ten-year accumulation settlement of the tunnel in overlapping zone is 173.7% larger than that in non-overlapping zone. Uneven settlement occurs in the overlapping zone, and the radius of curvature of the tunnel (12,461 m) exceeds the requirements of the specification (15,000 m). Grouted reinforcement can control the uneven settlement well. Radius of curvature of the tunnel can be refined to 33,967 m, which meets the requirements of the specification.
Dynamic Response and Long-Term Settlement of Four Overlapping Tunnels Subject to Train Load
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Nazarian, Soheil (editor) / Al-Qadi, Imad (editor) / Qamhia, Issam I.A. (editor) / Zhou, Xiangliang (author) / Gong, Quanmei (author) / Tian, Zhiyao (author) / Shan, Yao (author)
2021-09-17
16 pages
Article/Chapter (Book)
Electronic Resource
English
Long-term settlement prediction over Shanghai metro tunnels
| British Library Conference Proceedings | 2005
| British Library Online Contents | 2017