Research on Deformation Control Technology of Large Diameter Shield Tunneling Under Existing High-Speed Railway Line
Shield tunnel construction will inevitably disturb the surrounding soil,and when a new shield crosses an existing high-speed railway line,ensuring the safety of high-speed railway operation is one of the key issues in the construction process.Taking the shield crossing of Shanghai-Nanjing intercity high-speed railway in Suzhou Tongjing Road North Extension Project as an example,we analyze the impact of large-diameter shield tunnel construction on the deformation of high-speed railway pile foundation by establishing a three-dimensional numerical model,and realize rapid prediction of construction deformation by combining with field monitoring data.In addition,we study the deformation control technology of shield crossing existing high-speed railway lines,and propose that the control of shield tunneling,synchronous grouting and secondary grouting parameters should be strengthened while taking composite isolation and reinforcement measures inside and outside the tunnel.
shield underpassinghigh-speed railway lineisolation pilenumerical analysisfield monitoringdeformation control
NETL
NSTL
万方数据
