Study On Optimization Design Of Foundation Pit Support Of Metro Station

In order to better alleviate the current traffic congestion in big cities,the construction of subway is an effective way to solve this problem.Subway can also promote the benign development of urban traffic,in recent years,subway has entered a rapid development stage,but the foundation pit construction safety of metro station is more outstanding,from the point of the current situation of the construction of the subway station foundation pit,revealed a very significant characteristics of "large,deep and close",so in the foundation pit construction process will often appear some unexpected circumstances,usually brings to the national direct economic losses and adverse effects on the society,therefore,to carry out the foundation pit supporting structure in the process of construction safety research is very necessary.The construction of foundation pit engineering is more complex,involving in geotechnical engineering,structural engineering,computational mechanics,such as the multidisciplinary cross and integration,this paper takes the security of foundation pit and the stability of the supporting structure optimization control parameters as the goal,to carry out theoretical research work on the foundation pit supporting,and rail line/R2 a station to Jinan project as the background,the finite element modeling and numerical analysis.PLAXIS 2D / 3D program is a series of powerful universal geotechnical finite element calculation software launched by PLAXIS B.V.of the Netherlands,which has been widely used in the finite element analysis of various complex geotechnical engineering projects,such as:Large foundation pit and the surrounding environment influence each other,the shield tunnel construction and the surrounding the pile raft foundation interaction between adjacent buildings,large(bridge pier foundation)and the mutual influence of adjacent foundation pit,the deformation and stress of the sheet pile wharf analysis,rising and dropping drastically water effect on the stability of the dam body,consolidation analysis of soft soil foundation,foundation pit precipitation seepage analysis and complete fluid-structure interaction analysis,building free vibration and dynamic analysis under earthquake load,slope stability analysis after excavation and reinforcement and so on.PLAXIS modeling was applied to analyze the stability and optimization of the foundation pit support system,and a reasonable support system was obtained to ensure the safety in the construction process and the smooth completion of the construction period,which can also provide some reference significance for similar projects.