Abstract
This paper is a new crossing of a certain city through existing project based on the highway, the 3D numerical simulation is used to the new crossing the roads longitudinal effects of vertical scope, the settlement of surrounding rock and the road, the stress value, as well as the lining of the stress state of. Research shows that six excavation can effectively control the road and the new tunnel surrounding rock displacement and stress by using CRD method in construction; the existing road longitudinal impact area from both ends of road about 6m; lining structure in a safe state, but the wall removed, effect on the internal force of lining is larger, should give attention to construction.
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