Low Frequency Vibration Of The Support System Of Tielu Subway Station Response Research

With the traffic congestion in major cities,in order to alleviate traffic pressure and improve people's quality of life,subway rail transit has developed rapidly,and the pits of subway stations have also been characterized by “deep,large,near,tight”.The effects of low-frequency vibration caused by subway operation on surrounding buildings are becoming more and more obvious,and the scope of influence is increasingly wide.Some low-frequency vibrations may even cause permanent damage to the structure.For this big problem,experts and scholars at home and abroad have started research,so they are aimed at subway trains.Low frequency vibration research and accurate predictive evaluation are necessary.This paper takes the Tielu station of Zhengzhou Metro Line 14 as the engineering background,combined with the concrete pit structure and support system of the Tielu station,the foundation pit of the 14 th line Tielu station of Zhengzhou Metro and the 6.54 m separation wall soil of the existing No.1 line.Body and Tielu station continuous wall and column.The Midas-GTS numerical simulation software is used to simplify the static and dynamic loads of the subway train respectively.The foundation pit and retaining structure,the supporting system,the foundation pit of the 14-line Tielu station of Zhengzhou Metro and the existing 6.54 m separation wall of the existing Line 1 The load simulation calculation is carried out on the continuous wall and column of the soil and Tielu station.The system explores the effect of single train load on the foundation pit support system and the load response effect of the Tielu station station under the combined train load.At the same time,combined with the actual monitoring structure displacement monitoring value and supporting axial force monitoring value and the numerical simulation of the foundation pit retaining structure value and the supporting axial force value,the train load and foundation pit of the existing train No.1 line are obtained.The relationship between the structure and the support system.According to the mechanical parameters and properties of the actual materials on the site,the variation of stress and displacement of the retaining structure and supporting system of the foundation pit under the low-frequency vibration disturbance of the No.1 line train is obtained through numerical simulation;The variation of stress and displacement of the station structure of the iron furnace station under low frequency vibration disturbance.This will provide reference for the operation and optimization of the station at the later stage,and provide reference experience for similar engineering construction.The paper has 74 figures,12 tables and 76 references.