【摘要】 以广东省揭惠高速公路小北山1号隧道为研究背景,采用理论分析、现场爆破试验和数值分析相结合的手段,简化小北山隧道爆破荷载,确定等效边界、开挖轮廓面上的荷载情况.围绕爆破荷载对隧道的影响及相关问题,研究隧道在承受爆破荷载时的动力响应特性和不同爆破参数对减振爆破的影响.针对爆破振动影响因素进行模拟分析,讨论相关影响因素和邻近隧道衬砌在不同间距下沿隧道轴向的振速分布分析及截面峰值振速分布的规律.更多还原

【Abstract】 Based on Xiaobeishan NO.1 tunnel of Jie Hui highway in Guangdong province,combining with the methods of theoretical analysis,field blasting test and numerical analysis,the blasting load of Xiaobeishan tunnel is simplified and the load situations on the equivalent boundary and the excavated contour surface are determined.The dynamic response characteristics of tunnel under blasting load and the influence of different blasting parameters on reducing blasting vibration are researched considering the influence of blasting load on tunnel and the related problems.Based on the simulation analysis of the factors influencing blasting vibration,the related factors and the vibration velocity distribution along the tunnel under different spacing and the rule of the peak velocity distribution in section are discussed.更多还原