摘要
以青岛地铁2号线某区间隧道近接建筑物爆破施工为背景,采用大段别雷管孔外延期技术,对上下台阶爆破网路进行优化,实现隧道快速掘进施工。结果表明:大段别雷管孔外延期技术可以实现上下台阶一次起爆,使每爆破循环节约用时1.5h,大大加快了隧道施工进度。
With the blasting construction of the buildings neighboring the tunnel of a certain section of the 2nd Line of the Qingdao Metro as the background,the blasting network for both the lower and upper benches is optimized by using the outside-hole delay technique for large-segment detonators,with the rapid excavation of the tunnel realized.The result proves that the outsidehole delay technique for large-segment detonators can make it possible to blast both the lower and upper benches by one-time blasting,as a result of which 1.5hours of the time of each blasting cycle is saved and the tunneling progress is greatly quickened.
作者
何闯
HE Chuang(Key Laboratory of Mine Disaster Prevention and Control,Shandong University of Science ＆ Technology,Qingdao 266590,Chin)
出处
《国防交通工程与技术》
2017年第1期75-76,10,共3页
Traffic Engineering and Technology for National Defence
基金
山东科技大学研究生科技创新基金项目(YC150304)
关键词
大段别雷管
掘进
爆破用时
爆破网路
一次起爆
large-segment detonator
excavation
blasting time
blasting network
one-time blasting
