Research on Influence of Drilling and Blasting Method on Structures Nearby During Tunnel Excavation
- 建筑土木－已发表论文 
采用钻爆法开挖隧道时,爆破振动将不可避免地对临近构筑物产生影响。文章以贵州盘兴高速上坡地隧道为研究背景,对该隧道施工方案及爆破振动计算原理进行了分析,通过LS-DYNA建立了该隧道的计算模型,模拟了隧道中药包爆炸过程,计算分析出岩体的受力及位移情况;研究爆炸产生的振动冲击波下输电塔的响应特征,提出隧道不同区段的爆破开挖优化设计方案,为类似工程提供参考和技术支撑。Drilling and blasting method are widely used in the excavation of tunnel, vibration induced by blasting inevitably influences the structures nearby. Taking Shangpodi tunnel of Panxing highway in Guizhou province as research background, this paper analyzes the tunnel construction scheme and calculation model of blasting vibration, and creates finite element model of the tunnel by LS-DYNA to simulate the explosion process of tunnel. Stress and displacement field of the surrounding rock arecalculated and analyzed. The response characteristics of transmission tower under vibration shock wave are studied, and the optimum design scheme of blasting excavation in different sections of tunnel is obtained, which could provide reference and technical support for similar projects.