硬质岩地层下隧道近接施工逐孔微差爆破效果研究  

STUDY ON THE EFFECTIVENESS OF HOLE-BY-HOLE MICRO-DIFFERENTIAL BLASTING FOR TUNNEL PROXIMITY CONSTRUCTION UNDER HARD ROCK FORMATION

作　　者：陈可刚 Chen Ke-gang

机构地区：[1]中铁二十二局集团第三工程有限公司,福建厦门361000

出　　处：《建筑技术开发》2023年第2期88-90,共3页Building Technology Development

摘　　要：以硬质岩地层下小净距接近工程为依托,结合国内外研究成果,展开对接近工程中新建隧道逐孔微差爆破施工效果研究。以动态化反馈施工理念为依据,充分利用监控量测,爆破设计参数完善,爆破方案优化,及时对新建隧道爆破产生的振动速度、位移和二次衬砌应力增量进行监测分析,减小新建隧道爆破影响效应;现场监测结果表明,采用逐段优化后逐孔微差爆破等爆破参数,设计合理,新建隧道下穿爆破未对既有隧道安全产生较大影响。以期为类似工法隧道工程爆破掘进施工提供参考和借鉴。Based on the small-clearance approach project under hard rock stratum,the study on the construction effect of hole-by-hole differential blasting for new tunnels in the approach project is carried out by combining the domestic and international research results.Based on the concept of dynamic feedback construction,we make full use of monitoring and measurement to modify the blasting design parameters,optimize the blasting plan,and monitor and analyze the vibration speed,displacement and stress increment of secondary lining in the existing tunnel after blasting in the new tunnel.The research results provide reference for similar tunnel projects in terms of theory and construction methods.

关 键 词：硬质地层 微差爆破 合理爆破间隔 施工效果 

分 类 号：U25[交通运输工程—道路与铁道工程]