青岛地铁太延区间爆破振动控制及影响评价  

Blasting Vibration Control Techniques and Influence Assessment on Qingdao Metro Line

作　　者：王仁涛[1] 王成虎[1] 江英豪 宋凯 周宜[3] 

机构地区：[1]中国地震局地壳应力研究所地壳动力学重点实验室,北京100085 [2]青岛第一市政工程有限公司,青岛266033 [3]山东科技大学矿山灾害预防控制国家重点实验室培育基地,青岛266590

出　　处：《爆破》2015年第3期139-145,共7页Blasting

基　　金：国家自然科学基金重点项目(51038009);国家自然科学基金面上项目(41274100);中央级科研院所基本科研业务专项资助项目(ZDJ2012-20)

摘　　要：城市浅埋隧道下穿建筑物的爆破施工应加强爆破振动控制。针对青岛地铁3号线太延区间段隧道下穿青岛疗养区供应公司,埋深为7.4 m、围岩IV^V级、地下水丰富等特点,结合先前其他区间段隧道施工经验,对该区段隧道施工进行专项爆破振动控制设计。通过采用大直径中空直眼掏槽和减小单段最大起爆药量,合理布置炮孔间排距、优化爆破网路,对爆破振动速度进行控制。对地上建筑物振动实时监测,爆破振速满足2 cm/s的爆破振速控制标准,振动峰值速度在砖混结构建筑物顶层存在放大效应。此爆破振动控制方案取得了良好的爆破振速控制效果和工程、社会效益,可为类似城市浅埋隧道施工提供参照意义。The blasting vibration of shallow-buried urban tunnel during a blasting operation should be controlled when the tunnel passes underneath existing buildings. The project of Qingdao Metro crosses underneath the Express. The surrounding rock mass of the tunnel was buried in 7.4 m deep, ranked as IV to V, with abundant underground water in the rock mass. Based on the previous blasting excavation experiences, the specific blasting vibration control countermeasures were taken. By drilling large-diameter pilot hole to release the surplus energy and controlling the maximum detonation dose for per priming charge during the blasting operation, the blasting vibration was controlled. Combined with the appropriate blast borehole arrangements and the optimized blasting network, surface blasting vi- bration velocity was controlled below 2 cm/s. The research on peak blasting vibration velocity was carried out by mo- nitoring the brick-concrete structure. The peak vibration velocity reached a maximum value at the roof of the house, which indicated a top-level amplification effect on the top structure.

关 键 词：浅埋隧道 爆破开挖 振动控制 振动监测 

分 类 号：U231.3[交通运输工程—道路与铁道工程] U455.41[建筑科学—桥梁与隧道工程]