摘要
深圳地铁5号线和7号线在太安站—怡景站区间为浅埋暗挖隧道,地表建筑物密集,按规范规定必须在爆破施工的同时进行震动监测,以保证施工环境的安全。文章选取了有代表性的监测断面,对其监测数据进行了分析,得出了沿隧道径向和法向的震动规律:径向上,在掌子面(0测点)两侧对称的测点的震动速度规律反映为成洞区大于开挖区;法向上,以掌子面(0测点)为中心,往两个方向呈现震速下降的趋势,而且近似线性下降。分析结果表明,采用密集减震孔和竹节的减震方法能够起到明显的减震效果,径向的减震效果比法向的要好。
The Tai＇an Station to Yijing Station running tunnel section of the Shenzhen Metro lines 5 and 7 is designed as a shallow-buried tunnel. Considering that there are many surface buildings, and following the requirements of tech- nical standards, blasting vibration should be monitored to ensure construction safety. This paper analyzes the moni- toring data obtained from some typical monitoring sections and determines the vibration law in radial and normal di- rections. In the radial direction, the vibration velocity in the excavated area is greater than that of the unexcavated area; in the normal direction, the vibration velocity reduces linearly from the working face to two sides with the center at the working face （zero test point）. The results show that shock absorption is evident by drilling intensive damping holes and stemming the bottom holes with bamboo, and the shock-absorption effect in the radial direction is better than that in the normal direction.
出处
《现代隧道技术》
EI
北大核心
2013年第3期142-146,共5页
Modern Tunnelling Technology
关键词
浅埋隧道
震动监测
减震效应
Shallow-buried tunnel
Vibration monitoring
Shock-absorption effect
