城市硬岩隧道下穿砖木结构建筑爆破控制技术  

Blasting Control Techniques for an Urban Hard-Rock Tunnel Passing Under Brick-Wood Buildings

作　　者：杨庆[1] 王海亮[1] 王军涛 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建教育部重点实验室,青岛266590 [2]中铁隧道局二处,河北三河065201

出　　处：《现代隧道技术》2014年第1期199-202,共4页Modern Tunnelling Technology

摘　　要：青岛地铁一期工程3号线03标段区间隧道下穿济军第一疗养院口腔科医院,隧道埋深14m。为了将爆破震动的影响程度降低到最小,开挖过程中采用了大直径中空直眼掏槽、控制单段最大起爆药量的方法,将地表震动速度控制在1.5cm/s以内,确保了地面建筑物、附近交通干道的安全;同时应用孔外延期技术对爆破网路进行优化设计,减少了因雷管段别限制而增加的爆破次数,降低了爆破所需时间,取得了良好的经济与社会效益。A running tunnel of lot 3 of the Qingdao metro line 3 passed under a dental hospital of the First Sanitarium of the Jinan Military Region at a depth of 14m. To minimize the impact from blasting vibrations, large diameter hollow-cylinder cutting and controlled maximum priming charge per delay were used as countermeasures in the excavation. In this way, the vibration velocity of the ground surface was controlled within 1.5cm/s and the safety of the ground buildings and main roads nearby was guaranteed. Meanwhile, using the outer-hole delaying technique, the optimized blasting network reduced the blasting times induced by the detonator segments and shortened the blasting duration, resulting in social and economic benefits.

关 键 词：硬岩隧道 下穿施工 爆破震动 爆破控制 

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]