Blasting Vibration Effects and Simulation Analysis of Large Section Ultra Shallow Buried Bias Pressure High Speed Railway Tunnel
To study the surface vibration effect caused by blasting construction of large-section ultra-shallow buried bias tunnels and improve the safety of tunnel blasting construction,combined with a high-speed railway tunnel project,Midas GTS software was used to simulate and analyze the vibration effect of an ultra-shallow buried bias tunnel under blasting load.The results show that there is a cavity effect in the tunnel blasting area within 16m,and the effect will disappear beyond this range.There is a phenomenon where the vibration velocity of the shallow buried side is greater than that of the deep buried side in the unexcavated area from the hole area to 6m away from the explosion source.The peak arrival time in the T2 direction on the shallow buried side is faster than that on the deep buried side,while in the T1 direction,it is the opposite.The initial peak velocity in the T2 direction of the shallow buried side is greater than the second peak.As the buried depth increases,the initial peak will be less than the second peak.
万方数据
维普
