Research On Actual Measurement And Numerical Simulation Of The Influence Of Subway Train Running On Environment Near The Subway Rout

The impact of subway train operation on the vibration of its adjacent building structure has become one of the outstanding problems in the development of urban underground rail transportation and its construction facilities along the line.In this paper,actual engineering projects are used to study the engineering cases of typical subway adjacent building structures that are affected by the vibration of subway trains,analyzing the regular influence of subway train operation on the vibration of neighboring building structures,by means of real-time measurements and numerical simulations.Aiming at the specific engineering demand,the vibration impact assessment of subway train operation has been carried out and the study on reducing the vibration of subway train operation has been studied.The main research work in this paper includes:(1)The actual measurement of the vibration,which was generated by the soil and building structure pile foundations in a commercial and residential building project site caused by the operation of Guangzhou Metro Line 6,was used to study the main behavioral rules and characteristics,including the vibration caused by the subway train running along the soil and building structure of the foundation of the project.The evaluation and suggestions are given on the vibration effects of the Guangzhou Metro Line 6 train operation on the underground commercial plaza adjacent to the commercial and residential buildings.(2)The actual vibration of the vibration caused by the train operation of the Shenzhen Metro Line 9 at the platform of a subway Station was measured to conduct the correlation analysis between the dominant frequency band of the vibration generated by the subway train operation and the train operation status,concluding that the characteristics of the vibration of the platform floor caused by the vibration of subway trains.(3)Based on the actual measurement and assessment of the vibration impact of a commercial and residential building project caused by the train operation of Guangzhou Metro Line 6,a three-dimensional finite element model of the train-tunnel-soil-building structure was constructed by using the finite element software MIDAS GTS NX.The finite element software was used to simulate the three-dimensional finite element model of a similar engineering project,to perform the dynamic time history analysis of the moving train load.The vibration response value obtained from the model calculation was compared with the vibration response value of the measured data.The reason analysis of the deviation between the actual measurement results and the calculation results was conducted to verify the feasibility and correctness of the simulation method.(4)According to the method of three-dimensional finite element model numerical simulation above,this study acts as an example of application analysis,predicting the vibration response of the planned construction of Guangzhou-Foshan Loop subway train on the building structure in a research center in Guangzhou,and studying the influence of subway train operation on the vibration of the building structure in the research center.Aiming at the simulation results,the vibration impact evaluation was carried out in conjunction with the relevant specifications and the normal working requirements of the experimental equipment.(5)Aiming at the impact of the subway train running on the Guangzhou-Foshan Loop on the vibration of the frame structure building in the research center,by changing the parameters of the three-dimensional finite element model,the author studies on the response to vibration of frame structure building caused by subway train operation,comparing the results of dynamic time history analysis with the results of standard model calculations.The study comes up with suggestions for reducing the vibration response of building structures.