Analysis Of Excavation Of Deep Foundation Pit And Its Influence On Adjacent Railway

In the process of deep foundation pit engineering,how to control the deformation of the foundation pit scientifically and effectively,and make the project have a certain guarantee in the aspects of safety and economy at the same time,which is a people have been in-depth study of the important issues.In this thesis,the deep foundation pit engineering in the process of road construction is studied in the case of Changdawu Road(Dongxin East Road-Shiqiao Road).The deformation of the supporting frame structure during the process of deep foundation pit is analyzed and studied using finite element software(MIDAS / GTS)to analyze the internal force or displacement in the frame structure of the project,and analyze the deformation and the predisposing factors of the supporting structure,and draw the conclusion as follows:(1)Taking the project as the background,this paper analyzes the deformation mechanism of deep excavation and the relevant data of on-site monitoring,which adopts the ways of the theoretical analysis and site monitoring,to get the deformation of the deep foundation pit supporting structure and deduce the law of the deformation,thus can optimize for the whole project supporting structure.(2)This paper uses Midas/GTS software to establish a three-dimensional numerical model which takes numerical simulation to the implementation of the deep foundation and simulation analysis of the force of each construction process,including brick pile internal force,axial force of steel support and so on.The establishment of the three-dimensional data model can play a certain role in the stability of the foundation pit,as well as all aspects of statistical data research in the construction process,at same time can avoid errors.(3)The influence of foundation pit excavation on the adjacent railway can be carried out dynamic simulation to data through the three-dimensional data model mentioned above,and the results of simulation are basically consistent with the actual situation.Through the calculation and analysis of the simulated data,the multiple deformation situations may be occurred in the implementation of the foundation pit project,there should reduce the rate for the occurrence in the actual construction process.And the simulation analysis shows that when excavates the deep foundation pit,it can’t ensure the deformation will not occur,thus can cause the displacement of railway track,so should minimize the impact on the adjacent railway track,and takes the specific measures for analysis and design.