Analysis Of The Influence Of Deep Excavation On Adjacent Bridge Piles In Construction Of Subway Station

In recent years,China's rapid economic development,the demographic dividend and a limited supply of land the city is becoming increasingly crowded,and limited ground space cannot satisfy the human traffic construction projects and growing demand for urban construction,people began to seek development of urban underground space Development and application of Metro can take advantage of a,it's become the inevitable trend of the development of big cities,but also became an important symbol of urban modernization.Subway construction problems in first is the problem of deep Foundation pit of Metro station,and General construction of the subway station in a relatively prosperous area of the city,surrounding complex,dense building,many of underground pipelines,and viaducts and other structures,which makes the surrounding of the building(structure),and surface protection of the pipeline to have higher requirements.Therefore,the study of deformation of deep Foundation pit of Metro station construction on adjacent bridge effect is of great significance.By using in-situ monitoring and numerical simulation analysis method,line in 10 North Street station in Shenyang Subway excavation of deep Foundation pit engineering background,analysis and study of deep Foundation pit excavation on surrounding surface,deformation of the pile and pile,and the design and construction of deep Foundation pit for future similar guidance explores are as follows:1)According to the location of deep Foundation pit and excavation depth,familiar with the project construction plan and the supporting structure form of the foundation pit,carry on the On-the-spot monitoring.Based on the field monitoring results,the changes of pile deformation,support axial force,ground subsidence and bridge deformation are analyzed.2)Using Midas GTS finite element simulation software,three dimensional finite element models,make it with the actual project situation as similar to pit branch of the study of structure and bridge as a whole,in engineering simulation of excavation of deep Foundation pit under actual operating conditions,and comparative analysis of numerical simulation results and monitoring data,Numerical simulation model of rationality,provide a reference for similar projects.4)By changing axial force,stiffness,from the Foundation pit supporting system different from,different geological conditions,retaining depth and depth of bridge pile design parameters,such as,analysis of different condition of horizontal displacement of deep Foundation pit excavation on adjacent pile effect and analysis of main factors affecting the deformation of adjacent pile.According to the analysis results,the protection measures for the adjacent pile foundation during excavation are provided for reference to the construction work of the adjacent Bridge Deep Foundation pit.