Zhou Y., Wang S., Wang J., 2016, Vibration Response of an Existing Tunnel to Adjacent Blasting Construction, Chemical Engineering Transactions, 55, 31-36.
With tunnels as the engineering background, we established a mathematic model between an existing tunnel and the adjacent tunnel under construction at different values of spacing. Analysis was conducted on the vibration response of the existing tunnel to adjacent blasting construction. Accordingly, we obtained the vibration velocity point layout scheme and the corresponding explosive loading optimization scheme: measurement points for the existing tunnel should be distributed over the middle-top front straight wall. The measurement point of fastest vibration is 4m before the tunnel face counterpart. Key monitoring should be done on the interval of -4m~10m from the tunnel face. By comparing the numerical simulation result with the measured data, we conclude that the measured peak vibration velocity and the numerical results basically share the same change trend. Proper control over explosive loading is crucial to diminishing blasting-induced vibration response and realizing normal operation of existing tunnels.
