The Prediction And Evaluation Of Environmental Vibration Caused By The Vibration Of Rail Traffic

With the development of society,the number of vehicles has been gradually increasing,and the number of national transport networks has been on the increase.The coverage area has been constantly increasing,and the problem of rail transit has become increasingly evident.In many areas,elevated traffic largely relieves traffic pressure due to its unique advantages.However,the problems accompanying it are constantly emerging.The noise caused by train operation and the environmental problems such as ground vibration have great impacts on the quality of life and work of buildings and people along the traffic and surrounding areas,the safety of buildings and The normal use of precision instruments has had a serious impact,causing many researchers to attach great importance.This paper studies the environmental vibration model and the environmental impact assessment method caused by urban elevated orbit,and discusses the rules and various influencing factors of different types of railways causing vibration in the site and surrounding buildings.The details are as follows:(1)The vibration model of the site and surrounding buildings caused by the trains on the ground,underground and overhead lines was established.The specific steps of the model are as follows.The first step is to establish the vibration source model of the train track structure.After obtaining motivation force,the related results are applied to the three-dimensional model established by ANSYS.Analysis of various influencing factors on model vibration system,including track irregularity,speed,train type,passenger capacity,train type,soil properties,foundation depth,span of bridge,bearing stiffness,building height and so on.(2)Through the establishment of a comprehensive analysis model,combined with different working conditions,analysis of the impact of different factors on the site and surrounding buildings vibration.Through the analysis of the system,on this basis,the forecasting model of the vibration of the elevated rail transit is established,which can predict the vibration of surrounding sites and buildings caused by elevated rail transit.(3)Through the evaluation criteria of environmental vibration and the summary of the process of evaluation,the assessment method of acceleration peak vibration level is summarized,and the practicability of environmental vibration prediction model caused by orbital vibration is further studied.