爆破振动对既有隧道影响的数值模拟分析

Numerical analysis of the effect of blasting vibration on existing tunnels

以深圳地铁6号线银湖站至八卦岭站矿山法施工区间隧道为背景,通过数值模拟,研究了爆破振动作用对既有隧道的影响,得到与现场监测近似的振动速度,验证了数值模型参数的准确性。同时,发现:掏槽孔爆破对既有隧道迎爆侧左拱脚处的影响最大。

Taking the mining method construction interval tunnel from Yinhu station to Bagualing station of Line 6 of Shenzhen metro as the background, through numerical simulation, the effect of blasting vibration on the existing tunnel is studied. The vibration velocity similar to that of field monitoring is obtained, which verifies the accuracy of numerical simulation. At the same time, it is found that cut hole blasting has the greatest influence on the left arch foot of the side of the existing tunnel.