摘要
在城市建筑和地下管线密集区域浅埋地铁隧道矿山法掘进施工中,控制爆破所产生的地震效应对地表建筑和地下管线的危害是关键。通过施工分析和方案优化,采用0.7 m短循环进尺、3 m长度小台阶、50 ms时间间隔延期起爆的松动爆破方法和合理爆破参数体系,在保证水平距离仅3.7 m砖混房屋和隧道上方各类地下管线安全情况下加快了施工进度。通过大量仪器监测和实际观察,提出闹市区隧道爆破时地表砖混结构建筑物允许安全振速1.5 cm/s为宜。
Through the construction analysis and scheme optimization, desided take the method of loosening bias- ring--the 50ms delay blasting of 0.7 m short circulation drilling footage and 3 m low-bench and reasonable blasting parameters system, in the construction of shallow-buried tunnel driving blasting under the area of dense urban architecture and under-ground utilities, the point is control the damage of earthquake effect of controlled blasting to the above-ground structures and under-ground utilities. At the circumastance of ensure the brick-cement building （ the horizon range to the right above of tunnel is 3.7 m） and various under-ground utilities safe. Througe many instrument monitoring and real course, put forward the allowed safety vibration velocity of the above-ground brick structure buildlug under the circumstance of the tunnel driving blasting in downtown should bellow 1.5 cm/s.
出处
《爆破》
CSCD
北大核心
2014年第3期91-95,共5页
Blasting
关键词
地铁隧道
复杂环境
爆破震动
短进尺
小台阶
subway tunnel
complicated environment
blasting bibration
short drilling footage
low-bench
