Numerical simulation of dynamic response of deep buried tunnel lining under adjacent blasting load
In order to study the dynamic response of the deep buried tunnel with small net distance under blasting load and ensure the safety and stability of the tunnel,under the background of three-hole separation tunnel blasting excavation,ANSYS/LS-DYNA was used to analyze the dynamic response of deep-buried tunnel with small net distance.The vibration velocity and displacement of the same section of the tunnel are analyzed at different measuring points of the vault,arch waist and arch foot.The results show that the inner arch foot of the lining(the side in contact with the free surface)vibrates first,and the vibration velocity of the outer lining(the side in contact with the rock)reaches the peak after blasting discharge.There is great difference in vibration velocity at longitudinal section.The effect of horizontal displacement is greater than that of vertical displacement.The maximum displacement occurs at the arch top,followed by the side arch waist on the side facing the explosion.The vibration acceleration of the measuring point at the arch foot of the section is the largest and the detonation is also the largest.
deep buried tunnel small spacingtunnel liningANSYS/LS-DYNAdynamic response
万方数据
维普
