Analysis&Research on the Impact of Shield Passing through Complex Railway Groups
Based on the research background of a section tunnel of Tianjin Rail Transit passing through the complex nodes of normal speed railway and high-speed railway,the railway subgrade settlement and viaduct bridge pile deformation caused by shield construction are analyzed through finite element numerical simulation.The research shows that the deformation of railway subgrade and bridge pile calculated by finite element numerical analysis is basically consistent with the theoretical analysis,which can be used to analyze the impact of shield tunnel crossing conditions.For railway lines with high protection requirements,isolation piles can be used to effectively reduce the impact of crossing construction.The addition of grouting hole segments and the secondary deep hole grouting can play a very good role in the protection of the crossing construction stage and the operation stage.
railway lineshield tunnelfinite element methodisolation pilesecondary deep hole grouting
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