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Review and Prospect of Structure Research of Underwater Shield Tunnel with Large Cross-Section

2011; Science Press; Linguagem: Inglês

1005-2429

Kun Feng,

Civil and Geotechnical Engineering Research

With the construction of underwater shield tunnels with large cross-section in China,some structural problems become more prominent,and the structure safety is a new challenge to face.The structure of underwater shield tunnels with large cross-section is becoming a research hotspot.Structural issues of large river-crossing or sea-crossing shield tunnels have inseparable relation to national preparedness and public safety.For the structural issues in design,construction and long-term operation,the recent developments in related fields were reviewed,including the analysis method and mechanical characteristics of segmental lining structures,the longitudinal stability of structure,the seismic behavior and vibration-absorption measures for shield tunnels and their secondary structures.In addition,the recent research results and new progress were summarized,including the analysis method and mechanical characteristics of segmental lining structures,the behavior of joints,the longitudinal stability of structure,the effect of coupling seepage and stress fields,and the upward movement of shield tunnel,the influence of abnormal loads in construction,the impact and evaluation of a fire in a tunnel,and the long-term durability and evaluation of segmental lining structures under a water environment.Moreover,a development tendency of the structural issues and problems to be solved were discussed.