Research On Dynamic Response Of Tunnel Lining Structure Under Explosion

Research on dynamic response of tunnel lining structure under explosion.Background is the tunnel in the new special passenger line from Beijing to Shenyang.Applying the blasting parameters and measuring point.Making the blasting vibration monitoring of tunnel.Analysis the discipline of the peak particle vibration velocity.Adopting the method of the fluctuant area and equivalent area.Studing the cumulative effect of tunnel structure.Concluding the maximum blasting vibration cumulative effect of tunnel is Z direction.Using the numerical simulative method of LS-DYNA.Analysis the discipline of the stress and displacement on the tunnel lining structure.Concluding the maximum stress in skew and the maximum displacement in haunch.Increasesing the strength of the lining.Stress showing a trend of increasing.Displacement showing a trend of falling.