Differential Settlement Control Technologies of the Long Submarine Tunnel Covered by Municipal Road

Differential settlement control technologies for the long submarine tunnel covered by municipal road under complex geological condition are studied by depending upon a typical composite tunnel called the Western Corridor Connecting Project from Shenzhen to Hong Kong. Based on the analysis and generalization of the geological conditions of the research area, the computation sections and their corresponding parameters are selected, the differential settlement of all the selected sections in the tunnel area are calculated by the specification method and the nonlinear finite element method, the differential settlement isoline map of the tunnel box and the overlaying municipal road are obtained, the secondary consolidation settlements after construction are predicted. The optimization design and control schemes to the key control bids are proposed. And the results provide useful references for the design, construction and decision making of the project.