Research On Environmental Vibration Induced By Trains On Bridge Section Of Cheng-Guan Rapid Railway

High-speed railway brings the negative effect mainly includes the vibration of pollution, noise pollution, and electromagnetic radiation. Vibration pollution has been identified as one of the seven environmental hazards, and become the focus of people’s attention.Inter-city railway is designed to meet the Large passenger flows between cities in a region. Inter-city railway need to get through crowded place,inevitably.Therefore environmental vibration pollution deserves more attention. this thesis is based on the domestic and foreign study about rail transit system environment vibration.To measure the environment vibration induced by the Cheng-guan high-speed railway,and research on environmental vibration characteristics induced by trains moving on bridge section of Cheng-guan rapid railway.First, to measure vibration at the point A of bridge section,analysis the ground environmental vibration characteristics,and fit attenuation equation.Then, to measure vibration at the point B of bridge section and point C of bridge transition section as comparison test. Through this study,we can get the following conclusions:1. By trains running faster, environmental vibration intensity become more stronger, and having more high-frequency vibration component.2. When the local surface conditions remain unchanged, with increasing distance from the center line, vibration intensity are constantly decay.The main frequency become narrow.High frequency decrease fast,mainly to low-frequency 15-30Hz. When the local surface conditions change, with increasing distance from the center line, vibration intensity rebound damping phenomenon.3. Ground Environmental vibration induced by trains moving on bridge transition section is higher than the bridge section.So bridges form is more favorable for reducing the vibration environment impact of the railway system.