Influence Analysis and Monitoring of Super-diameter Shield Tunnel Crossing Existing Pier Group Piles
Based on the engineering background of the Shenzhen Chunfeng Tunnel crossing the existing pier group piles of the Buji River,the deformation law of pier group piles in shield tunneling is studied by means of numerical simulation and field monitoring.Both the calculation results and the monitoring results show that the final settlement of the ground surface in the pile foundation area is obviously larger than that in the other areas.The shield tunneling has a great influence on the vertical deformation of the bridge pile,however,it has little influence on horizontal deformation of the bridge pile.The measured maximum settlement and maximum uplift of the bridge pile foundation are 0.93 mm and 2.94 mm,respectively,which meet the safety control standards formulated according to the calculation results,and verify the rationality of the standard formulation and the reliability of the numerical calculation results.In addition,the monitoring results show that the shield tunneling has a great influence on the deformation of the pile foundation in the range of 15 m before the pile to 40 m behind the pile,and the change of the tunneling parameters also has a certain influence on the deformation of the bridge pile.
万方数据
维普
