The Study About Dynamic Behavior Of Underground Tunnels Space And Vibration Reduction Under The Condition Of Close Contact Basing On Train-tunnel Coupled System

With development of the national economy and the improvement of the peopleliving standards。In recent years, Metro Rail Transit in China were vigorously used,However, at present the study of the vehicle, tunnel, and the interaction between thetwo dynamic problems are still small. With the environmental vibration Probleminduced by rail transit has become increasingly serious, so to carry out vehicle-tunnel under the subway tunnel coupled dynamic response analysis and assessmentof the impact on the surrounding environment research has important practicalsignificance.In this paper, on the basis of the vehicle-track-tunnel interaction relationshipCompatible by the displacement of the vehicle and the track conditions, Analyzesand calculates a variety of different influencing factors, subway train operationcaused by the vibration of the building law, And take a different vibration isolationmeasures to reduce train-induced vibration in buildings. Article main contentsummarized as follows:①Consided the body vertical vibration, vertical vibration of a suspension andwheel under vertical vibration of the vehicle vibration model was established andvibration equation. Vehicle and track through the compatibility condition ofdisplacement, and discrete equations of the vehicle’s orbit-the tunnel linking thevibration equation of form reflecting the vehicle-track the systematic couplingmodel and equations.②Developed a numerical simulation program for vehicle-tunnel coupleddynamic analysis. Detailed analysis of the vehicle-track-tunnel interaction process,Numerical analysis of the vibration of the building when the subway train operation。③Under the influencing factors of the rail surface irregularity, differentdistances, different train speed, And proposed the countermeasures and measures todeal with the train vibration.