| ChengGuan rapid railway YingBinLu station foundation pit engineering is taken as the object of study in this paper. Aimed at the monitoring datas of the pile deformation, the strut-axial forces of steel supports and the internal force of pile rebar and so on analysis. Numerical simulation analysis the pit supporting structure combining analysis results. Adopted the way of the theoretical analysis and numerical simulation method combining site monitoring, analyzed the pile deformation factors of foundation pit.1.Summarized the development history of excavation engineering, the current situation of the development of the excavation engineering and its development trend.2.System analyzed the foundation pit deformation characteristics of the types and control mechanism.3.Introduced the engineering monitoring of landform and design principles, Sorted out and analyzed the monitoring data, Researched the piles'displacement in the construction process, surface subsidence and the change rule of reinforced internal force in pile body, compared with the monitoring datas and the warning values, guide the future construction safely.4.PLAXIS,an huge geotechnical engineering finite element program,has been introduced. 2d finite element analysised the excavation process of the station using PLAXIS, comparative analysised the theory of the deformation curve and the measured deformation curves and found out that the both change trend was consistent.Analysis illustrated the measured value and theoretical value of the causes of the differences.Verified the reliability and rationality of building model.5.Modeling analysised affecting rapid railway station excavation support structure deformation factors,mainly discussed and analyzed in construction factors,design factors and natural soil condition factors'influence.Got a general conclusion. and finally put forward the control measures of deep foundation pit deformation,to provide the reference for Later similar project construction. |
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