The Finite Element Analysis Of The Interaction Between Subway Underground Structure And Soil

In recent years,the subway has become an important part of city traffic,and traffic tension in big cities has become increasingly apparent,the development of the subway as the backbone of large capacity rapid public transportation system is the basic way to solve the traffic congestion.At present our country has a lot of big city subway has already become one of the main mode of transportation.Because the subway construction technology and cross,complexity and particularity of the construction,how to reduce the risk in the subway built and run has been an urgent problem,this article is based on an actual case to carry on the numerical simulation of the subway tunnel,analysis the construction in the process of tunnel-soil interaction,through the theoretical analysis and finite element simulation,the master under the subway vehicle load effect and soil interaction in soil tunnel-the dynamic response characteristics of the structure.The main content of this paper include:(1)from two aspects of the research background and significance,this paper expounds the research direction of value,and the accumulation of train vibration load at home and abroad are summarized and the propagation law research,train vibration response analysis of the current state of research study and the development direction of this series of research,for subsequent analysis provides the effective guidance and reference.(2)Base the basic theory of dynamic analysis,unit movement equation and the system dynamic response and so on tunnel-soil structure was introduced in detail the theoretical basis of dynamic response analysis.Introduces the constitutive model of the dynamic analysis and establish the geometric equations,and the unit is deduced from the basic equations of mathematical analysis.(3)The large general finite element software ABAQUS finite element analysis model of shield construction,from the finite element analysis model of unit,the constitutive relation selection way and death unit implementation method in ABAQUS,detailed introduces the finite element analysis model of process modeling analysis,including geometry information and boundary conditions and parameter Settings.And analysis of shield tunnel during the construction of soil deformation,stress and lining stress changes.(4)from the incentive theory of metro trains,in detail elaborated the subway train wheel/rail interaction,and the finite element analysis model based on shield construction and the analysis conclusion,by setting up the dynamic load,dynamic incentive simulation train driving load,the subway tunnel under the action of vehicle load-soil is studied under the structure of the surface soil response and train vibration on the influence of lining.Finally,summarizes the full text research results,and puts forward the subsequent need to continue to study the problem.