Abstract：
This paper aimed at the problem of Line 4 of Xi'an Metro relates to the protection of cultural relics, proposed heritage preservation targeted principles. Utilization of surface subsidence model to predict the subway tunnel surface subsidence, to assess the impact of Ming City Wall relates to Line 4 of Xi'an Metro, and to propose the principle of the protection of culture relics of the tunnel section beneath the Ming City Wall in the subway construction process. Evaluate the impact on the city walls during subway operation and propose protective measures to minimize the impact of the subway construction, to achieve the transportation and the environment friendly development.
