Research On Prediction Of Shijiazhuang Metro Train Vibration Environment

With the continuous expansion of the city population in Shijiazhuang City,traffic congestion is generally serious,so the establishment of urban subway in the capital is imperative,the subway’s construction of the provincial capital is also subject to the enthusiasm of the general public.The study of subway vibration dynamic response,propagation attenuation law and vibration evaluation also attracted the attention of experts and scholars.In this paper,I learned a large number of paper and articles,this paper analyzes the vibration of this series,and makes a three-dimensional numerical simulation of the North Song station to Tangu station of the Shijiazhuang Metro Line 1.This paper is divided into single line and double lines,and different train speed.The dynamic response analysis and the vibration propagation attenuation prediction are carried out on the horizontal and vertical surfaces,and their variation rules are summarized.Secondly,the recovery point of the house at the horizontal distance of 20 m from the edge of the lining of the tunnel is evaluated.Finally,the vibration and noise reduction effect of the filling groove is studied.The main contents and conclusions of this paper are as follows:(1)To summarize the research status of the prediction of the environmental impact of the train vibration at home and abroad.Introduce the measures of vibration and noise reduction;Explain the two kinds of forecasting methods of train vibration,summarize the evaluation index and standard of train vibration;Check the railway vibration related literature;This paper calculates and summarizes the soil parameters and train parameters.(2)Using the Midas GTS NX to establish the three-dimensional finite element model of the track-tunnel-soil.The dynamic response and propagation attenuation law of the vibration wave in the soil are studied by single-line and different speed.(3)To evaluate the residential area with a horizontal distance of 20 m from the edge of the right tunnel lining on a surface,and checks whether it meets the relevant vibration standards in China.(4)Finally,this paper analyzes and calculates the damping and noise reduction effect of filling ditch.