【摘要】 为通过简单加荷方法了解爆破振动对周围结构的影响,针对某大型地下洞库,在利用数值模拟方法分析开挖爆破对临近衬砌的影响中,根据柱状药包爆破情况和爆破振动的传播特点,利用衰减后的波动模拟爆破振动加载,形成作用于开挖面上的动荷载形式。通过数值模拟结果和现场测定结果的对比分析,得到较好的模拟效果。可以用此简化加荷方法进行类似动荷载对结构的振动影响分析。更多还原

【Abstract】 To study the effects of blast vibration on the adjacent structure,the method of numerical simulation was used to analyze the effect of blast vibration on the adjacent concrete liner in a certain large-scale tunnel.Based on the attenuation law of the blast waves in rock of the cylinder charge,the dynamical load added on the excavation face after the attenuation was used to simulate the excavation explosion vibration.The numerical simulation results agree well with the experimental observation.更多还原