Deformation Influence and Control Technology of Shield Tunnels in Soft Flow Plastic Strata Passing through Operating Lines at Close Range
Based on the shield tunnel project in a section of Nanjing Metro passing through an operating tunnel at close range,the deformation characteristics of the operating tunnel in soft flow plastic strata during the whole process of newly-built shield tunneling are studied by theoretical analysis,model test,numerical calculation and field monitoring.The results show that after the completion of the left line shield tunneling,the deformation curve of the operating tunnel is in a"V"shape,while after the completion of the right line shield tunneling,the deformation curve of the operating tunnel changes from a"V"shape to a"W"shape.The settlement law of numerical calculation is basically consistent with that of field monitoring,and the maximum settlement values are-4.36,-3.47 mm respectively.The combined reinforcement measures of steel ring in the tunnel and micro-disturbance grouting can effectively control the settlement deformation of the operating tunnel caused by the shield tunneling through in soft flow plastic strata.
万方数据
维普
