A Research of Deformation Rules of Metro Deep Foundation Pit in Ningbo

During metro excavation construction,impacted by the geological conditions and the project surroundings,the retaining structure will vary widely.Taking South East-ring Rd.Station excavation project,Bid TJ-Ⅷ of Ningbo Urban Rail Transit L1(Phase I) for example,the deformation rules are obtained by analyzing the site monitoring data.The research results may show that a high positive correlation exists between the maximum deformation and excavation depth,the deformation at different depths is bow-shaped with greater impact on the near soil of the same depth.