2014, Volume 16, Issue 11
Strategic Study of CAE >> 2014, Volume 16, Issue 11
Blasting Technologies of Decreasing Vibration in Subway Tunnel Underpass Adjacent Upper Buildings
China Railway Tunnel Stock Co. Ltd.，Luoyang，Henan 471009，China
Next Previous
Abstract
Reduce the blasting vibration is important for blasting excavation in subway tunnel construction. Take the 3rd bid section of Line 3 of Qingdao subway project for example, the distance between tunnel vault and ground is 5~8m, in order to insure the safety of the upper buildings, technologies of parallel cut with big empty hole, one-time initiation and delay by parts, and multiply short holes were adopted in the project. The results show that the maximum value of vertical vibration limited in the criterion allowance, and the upper buildings was intact. Besides, problems of shock conducting tube detonator delay number difficulty to meet large cross-section tunnel blasting excavation requirements, multiple cross-section can’t initiation simultaneous, and low construction efficiency were solved, which ensure the construction safety and schedule.
Keywords
blasting design ; parallel cut ; big empty hole ; delay- time initiation ; short- hole blasting
Figures
图1
图2
图3
图4
图5
图6
图7
References
[ 1 ] 李现森，付迎春，孙星亮. 青黄海底隧道接线工程近接地面建筑 物段爆破震动控制数值分析[J]. 石家庄铁道学院学报（自然科 学版），2007，20（4）：71-74. link1
[ 2 ] 赵继增. 青岛地铁隧道掘进的爆破控制及减振方法[J]. 地铁与 轻轨，1998（5）：25-30. link1
[ 3 ] 李 萍. 渐进式大直径空孔螺旋掏槽爆破参数的研究[D]. 武 汉：武汉理工大学，2010. link1
[ 4 ] 周春锋. 城市浅埋隧道开挖减震控制爆破技术[J]. 工程爆破， 2001，7（1）：57-61. link1
[ 5 ] 国家质量监督检验检疫总局. 中华人民共和国国家标准：爆破 安全规程[S]. GB 6722—2003.
[ 6 ] 邹定祥. 复杂环境下的地铁隧道爆破技术[C]// 第七届全国工程 爆破学术会议论文集工程爆破文集. 北京，2001. link1
[ 7 ] 罗厚金，方俊波. 青岛胶州湾海底隧道陆域段近距下穿地表建 筑物爆破震动控制技术[J]. 隧道建设，2011，31（3）：375-380. link1
京公网安备 11010502051620号
