Analysis of Vibration Characteristics of New Subway Tunnel Undercrossing the Existing Highway Under Blasting Construction

Abstract

During urban subway tunnel construction, the blasting inevitably has an impact on the ground structure. If it’s energy is not controlled, the surface of existing structures would be easily causing damage. So, according to one subway tunnel undercrossing the existing highway, based on the numerical simulation, three different levels of surface orientation at distances of surface vibration velocity are obtained. And, the propagation and characteristics of vibration are investigated under the effect of blasting vibration velocity control measures.