摘要
在对地铁隧道开挖时的爆破地震效应和参数分析的基础上,针对地面建筑结构对爆破振动的响应进行了理论分析。通过对深圳地铁隧道开挖爆破在地面产生的爆破地震波的现场监测和分析,得到了爆破振动在地表建筑物中产生的质点振动速度和频率等参数,拟合出了振动速度、药量大小与爆源距离之间关系式。研究结果表明,在近地表的地铁隧道爆破产生的振动频率远大于天然地震的频率,一般在100～150Hz,这对地面建筑结构的安全是有利的,以爆破振动速度标准作为地面建筑物的安全判据是合理和可行的。
Based on analyzing seismic effects and wave parameters of the excavation blasting in metro tunnel,the seismic response of building structure under the seismic effects of blasting were analyzed theoretically.According to the seismic wave parameters measured on the surface buildings in Shenzhen Metro tunnel blasting,the velocity and frequency of explosion seismic wave in building were determined,and the relation formula among the seismic velocity and the charge quantity and the distance to the explosive source was also obtained.The research results indicate that the vibration frequency of the surface buildings in tunnel blasting is about 100～150 Hz,which is much larger than natively seismic frequency of the bulidings,therefore taking the seismic velocity as a safe criterion of the building sturture in tunnel blasting is rational and effective.
出处
《四川建筑科学研究》
北大核心
2010年第3期154-157,共4页
Sichuan Building Science
基金
国家自然科学基金资助项目(50874039)
关键词
地铁隧道
开挖爆破
建筑结构
地震效应
metro tunnel
excavation blasting
bulding structure
seismic effects of explosion
