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在目前的隧道掘进过程中,多采用的是爆破开挖法。以武汉地铁二号线工程为背景,采用现场爆破振动监测与数值模拟相结合的方法,对隧道掘进爆破过程中产生的地表振动效应进行研究。结果表明:数值计算所获得的地表振速峰值与现场监测结果吻合较好,其变化规律和特征与实测结果基本一致,证明采用数值模拟方法研究隧道掘进爆破产生的振动效应是可行的。成形隧道对地表振动速度存在不同程度的放大作用,在后续的施工中应该注意控制爆破振动速度,保护成形隧洞上方建筑物的安全。
In the current tunneling process, the use of blasting excavation method. Taking the project of Wuhan Metro Line 2 as a background, the effect of surface vibration caused by tunneling blasting is studied by the combination of on-site blasting vibration monitoring and numerical simulation. The results show that the peak value of surface vibration obtained by numerical calculation is in good agreement with the on-site monitoring results. The variation regularity and characteristics are consistent with the measured results. It is proved that it is feasible to study the vibration effect of tunnel boring blasting by numerical simulation. Formed tunnels can amplify the vibration speed of the ground to some extent. In the following construction, the vibration speed of blasting should be controlled to protect the safety of the buildings above the forming tunnel.