Study On Construction Monitoring And Numerical Simulation Of Deep Foundation Pit Of A Subway Station In Shenzhen

With the continuous acceleration of the new urbanization process in China,the development and utilization of urban underground space resources has become the key to promote the development of urban economy.Generally,the underground space of the city is developed,such as underground garage,underground square,rail transit and so on.Among them,with the development of underground space structure,deep foundation pit engineering will continue to increase,so that inevitably,there will be some problems,for example,the slope failure of deep foundation pit and the settlement of foundation surface.The emergence of these problems will not only cause serious economic losses,but also cause casualties.Therefore,this paper has important cognitive significance on the monitoring of a certain foundation pit,and the use of numerical simulation.In this paper,the Shenzhen metro line ten station as the engineering background,and based on the monitoring of the actual situation of the project,the software FLAC 3D to establish the model of the three-dimensional finite difference analysis of foundation pit.Simulate the whole process of deep excavation and shoring engineering of Fumin station,analyses the deep foundation pit engineering under different working conditions of the wall under the horizontal displacement,pit bottom uplift of foundation pit,ground settlement and internal bracing axial force,the foundation pit supporting structure and surrounding soil in foundation pit engineering the changes in the law,at the same time,the difference of monitoring data of foundation pit engineering and finite difference software simulation,the difference and trend of numerical simulation results and monitoring results found on the little that applied soil deformation finite difference,the parameters used by software FLAC 3D in the numerical simulation process are correct and reliable.