Research on Damping Blasting Technology of Subway Station Foundation Pit

To optimize the design of blasting excavation and construction of the subway station in Chongqing, FEM dynamics research was carried out based on ANSYS/LS-DYNA. It analyzed the vibration velocity of the etaining pile, air shaft and tunnel structure caused by blasting during the excavation process, and proposed a reasonable scheme to reduce blasting vibration. Both numerical simulation values and the field monitoring data illustrate the same attenuation law. That is, the blasting impact on the structure can be effectively reduced by optimized design. Setting a damping isolation belt is a relatively effective method for damping blasting impact. The achievements of numerical analysis and construction scheme could be references for the similar deep pit excavation design in urban area.