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Xi'an as one of the four ancient capitals of the world , splendid culture and long history of Xi'an left a rich historical and cultural sites . Xi'an City Wall has been UNESCO as world cultural heritage , has a very high historical and cultural value . Due to its special geographical location, is planning the construction of Xi'an subway lines beneath the walls of as many as eight . Although the subway vibration tiny but continued in the adjacent building , due to the ancient age of the building , the strength is reduced , damage accumulation , which is slightly more sensitive to vibration . How to make ancient artifacts in harmony with the modern means of transportation , is the inevitable question of Xi'an subway construction and operation of the process . Xi'an Metro Line engineering background , to the South Gate section of the ancient walls of the research objectives through the establishment of three-dimensional finite element model of the walls and foundation soil , analyzed the effects of vibration generated by the upcoming operation of the second line the walls . Wall -powered full transient analysis, the paper first introduces the current profile of the Metro Line engineering background and Xi'an City Walls , pointed out the significance of the protection of the ancient city walls . The same time, on the walls of the constituent material of the dynamic parameters of the analysis . Second, to establish the finite element model of the walls of the foundation soil , the model range , cell size , time step , and artificial boundary are discussed . Finally, the method of application transient Urn walls and the walls of the Urn in different train speed under the action of the response , and pointed out that the most unfavorable speed of action , and under the most adverse effects of vibration velocity and specifications contrast , provide reference materials for the protection of the city walls .
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