Study Of City Subway Traffic Vibration And Strong Ground Movement Observation

This paper studies mainly the mechanism of subway traffic generatingvibration, the linear model of wheel-railway system and the vibration wavespread; Taking the replacement of an odeum building near subway as an example,this paper studies effects of subway on the building and vibration insulationbased on 80 measure files. This paper introduces design and realization of strong ground movement observation system of city, and expatiates the core software of the system which is compiled with VC++ language and Windows platform. In addition, the special features on technology of the software are emphasized.The whole thesis consists of five chapters. The essential content of each chapter is outlined as follows:Chapter one: Introduction. The study background of this paper is expatiated. The importance and necessity of this paper are pointed out. The traditional thought-ways and achievements of study of city subway traffic vibration and strong ground movement observation are introduced. Finally, the main contents of the paper are summarized briefly.Chapter two: The study general situation and study model and methods of city subway traffic vibration are introduced. The linear models of wheel-railway system are analyzed. The spread and attenuate of vibration wave caused by the city subway traffic system are analyzed. From instance analyses several conclusions are arrived at: the vibration amplitude attenuates with distance ; the vibration wave frequency caused by the city subway traffic system is abundance, the main component is from 50Hz to 80Hz; the high frequency attenuates quickly than low frequency.Chapter three: Taking the replacement of an odeum building near subway as an example, this chapter studies the effects of subway traffic vibration on building. Human response to vibration and noise caused by subway traffic system are analyzed. According to spectral analysis and contrast analysis of measure data, this chapter draws conclusions as follows: the vibration caused by the city railway traffic system further cause the buildings vibration; vibration effects on building depend on the structure of the building to a great extent and its bearing and angular rigidity. Finally, the control measures of vibration caused by subway traffic are put forward.Chapter four: design and realization of the system of strong ground movement observation and its core software are introduced. The core software is compiled with VC++ language and Windows platform. The framework and functionrealization of the data collect, the real-time observation system, the network transmission system and the control centre system are expatiated. Finally, the special features on technology of the software such as multi-thread, share-EMS and message mechanism and so on are emphasized.Chapter five: conclusion. The character, achievements and terse conclusions of this paper are summarized; shortcomings of this paper and future research orientations are put forward.