城市浅埋隧道下穿密集建筑群控制爆破技术  

Controlled Blasting Technology of Shallow Tunnels Crossing Underneath Intensive Existing Buildings in Urban Area

作　　者：付晓强 雷振 刘幸 张仁巍[1] FU Xiao-qiang;LEI Zhen;LIU Xing;ZHANG Ren-wei(School of Civil Engineering,Sanming University,Sanming 365004,China;Institute of Mining Engineering,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]三明学院建筑工程学院,三明365004 [2]贵州理工学院矿业工程学院,贵阳550003

出　　处：《科学技术与工程》2019年第2期223-227,共5页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(51664007);三明学院引进高层次人才科研启动经费(18YG13)资助

摘　　要：城市浅埋隧道下穿密集建筑群时,如何在保证掘进效率的前提下,控制爆破振动对地表建筑物安全的影响是关键。现以贵阳观山西路至兴筑西路段隧道施工下穿金阳步行街为工程背景,通过中心大空孔二阶复式掏槽形式,设计合理的装药结构和爆破参数;采用雷管跳段使用对起爆网路进行优化,成功地将地表振动速度控制在2. 0 cm/s范围内。通过地表振动监测与爆破信号分析,证明了该爆破方案的可行性,具有良好的经济和社会效益。When shallow tunnels are excavated underneath intensive existing buildings in urban area,how to control the impact of blasting vibration on the safety of surface buildings under the premise of ensuring tunneling efficiency is the key.Taking the tunnel construction of Guiyang Guanshan west road to Xingzhu west which crossing Jinyang pedestrian street as the project background,the center of large empty hole combined with double cut form is used,reasonable charge structure and blasting parameters are designed,the detonator jump timing is used to optimize the detonator network,the ground vibration velocity is successfully controlled within 2.0 cm/s.The feasibility of the blasting scheme is proved by the monitoring of ground vibration and the analysis of blasting signal,which has good economic and social benefits.

关 键 词：浅埋隧道 毫秒爆破 振动监测 时频分析 

分 类 号：TD235.1[矿业工程—矿井建设]