The Interaction Research between Large Span Road Tunnels Acted by the Blast Load

The interaction between close tunnels has important role to the stability of the adjacent tunnels,especially,when the road tunnel is developing to the large span region,the significance of the interaction between adjacent tunnels is more outstanding.Because the blast working is the main method for general road tunnels to construct,which is the cause that makes the interaction between close tunnels is significantly different from the static load acted on the tunnel.This paper use the midas GTS to analyze the interaction between large span road tunnels acted by the self-weight and blast load under the different locations in the vertical plane,and have got the conclusions that the interaction between adjacent tunnels and the transportation feature of dynamic displacement and velocity in the surrounding rock and the shot-concrete lining.