Deformation Influence Analysis Of Pile Of Bridge Piers Of High-Speed Railway Affected By Adjacent Deep Foundation Pit

With the local government infrastructure investment is increasing, in the construction process due to geographical and other reasons had to wear under(or on the cross) high-speed railway underground pipe or cable, Therefore, to ensure the safe operation of high-speed railway bridge, basis on an engineering example, this paper have done the following work:First, deep excavation supporting structure of frame protection 220 KV cable wear under PuTian bridge was designed; Through this investigation, develop a reasonable monitoring program; analysis based on field monitoring data obtained steel pile horizontal displacement, horizontal displacement of pile top, surface subsidence, settlement and pier pier tilt variation; Then using the finite element software abaqus build deep excavation numerical model, compare and analysis the calculating result and monitoring results, Second, in the case of the calculation results are reasonable and changed working conditions, analysis of the pier from the pit different distances, different supporting structure stiffness and excavation during different geological conditions near pier pile; Finally, basis on the site monitoring data, calculations and results of previous studies, this project is proposed pier Settlement control value, it can provide a reference for high-speed rail near the deep excavation work.