摘要
文章以兰渝线关子岭隧道为依托,针对特大断面隧道V级围岩段采取光面爆破与预裂爆破两种爆破方案进行对比分析。结果表明:大断面隧道爆破开挖施工中最大位移出现在拱顶部位,施工中应加强对拱顶部位及其他关键点的监测;最大主应力出现在仰拱中点和拱腰部位,施工中须加强对仰拱中点和拱腰部位的支护。
Based on the Lan-yu line, Guanzlling tunneh the article conducts a comparative analysis on smoothing blasting method and or pre-splitting blasting method targeting V-level large cross-section rock wall.The results have shown that the largest replacement occurs at vault session during blasting construction, which needs extra monitoring as well as many other key locations.As for the main stress force, it occurs at the center of the inverted arch and hance,which also need special support.
出处
《西部交通科技》
2010年第4期50-57,共8页
Western China Communications Science & Technology
关键词
特大断面隧道
光面爆破
预裂爆破
数值分析
Large cross-section tunnel
Smooth blasting
Presplitting blasting
Numerical analysis
