ABSTRACT
In order to alleviate the pressure of the ground transportation, urban subway has been programmed or built in big cities. As a kind of modern transportation facilities, subway has shown us the advantages of safety, speediness, low power consumption, low pollution etc. It has been the main part of the Beijing’s high-capacity public traffic system. Along with the development of city in Beijing, more and more civil engineering construction must lead to the deformation of the adjacent subway tunnel. It causes the severe influences to the stabilization and safety of the tunnel, thus endanger the whole urban transportation system. During the construction of periphery foundation ditch engineering and tunnel engineering, how to guarantee the safety of the subway tunnel has been the severe difficulty needed to be solved.
