微振爆破技术在复杂环境下硬岩隧道施工中的应用  

Application of Micro-Vibration Blasting Techniques for Hard Rock Tunnel Construction in Complex Environments

作　　者：陈文尹 

机构地区：[1]中铁四局集团第七工程分公司,合肥230032

出　　处：《现代隧道技术》2017年第2期207-212,共6页Modern Tunnelling Technology

摘　　要：青岛地铁3号线青人区间隧道处于微风化花岗岩地层,浅埋下穿国家级文物保护建筑和中山路人防裸洞室群,周边环境复杂。为确保古建筑群的安全和防止裸洞室群坍塌,文章通过现场试验,验证爆破安全判据;采用大直径超前掏槽空孔、直眼掏槽逐孔延时起爆、分区孔内外毫秒延迟起爆网络、周边预钻减振孔、周边孔隔孔装药、时空降振等综合减振技术措施,成功穿越文物保护建筑和人防裸洞室群,形成的微振爆破技术研究成果可为类似工程提供参考。The Qingren running tunnel of Qingdao metro line 3 is located in a slightly weathered granite formation and passes underneath some preserved national historic buildings and an civil defense cavern group, with a very complex surrounding environment. To guarantee the safety of the ancient buildings and prevent the cavern group from collapsing, the safety criterion for blasting is verified by field tests; the tunnel may safely pass beneath the historic buildings and cavern group by using such measures as a large-diameter hollow cut hole, delayed ignition with a parallel cut, a millisecond delayed detonating network with different zones and pre-bored vibration attenuation holes.

关 键 词：微振爆破 硬岩隧道 大直径超前掏槽空孔 毫秒延迟起爆网络 时空降振 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]