深圳赤湾停车场石方开挖爆破振动安全控制研究

Research on Blasting Vibration Control during Rock Excavation of Chiwan Metro Parking Lot,Shenzhen

在城区复杂施工条件下开展的深圳赤湾停车场石方爆破开挖工程,爆破振动对周围建筑物的安全影响不容忽视。为了分析爆破振动对周围重要建筑物的影响,在石方爆破开挖过程中开展了爆破振动监测,基于监测数据,对爆破振动衰减规律进行了回归分析。根据爆破振动衰减规律计算了最大允许单响药量,为有效控制爆破振动的危害提供了参考。爆破振动监测及衰减规律分析结果表明:爆区后冲向的衰减参数均大于对应爆区侧冲向的衰减参数,采用控制最大单响药量、合理调整爆破开挖推进方向以及减小前排抵抗线等措施,能有效控制爆破振动对周围重要建筑物的影响。

During rock excavation of Chiwan Metro Parking Lot,Shenzhen,in order to analyze the influence of blasting vibration on the surrounding important buildings,blasting vibration monitoring work was carried out.The vibration attenuation parameters K andαwere obtained based on the monitored data through the least square method,and then the maximum single charging weight was calculated according to the attenuation law,which offers a reference for effectively controlling blasting vibrations.The results of blasting vibration monitoring and attenuation law analysis show that the impact of blasting vibration on important buildings can be effectively controlled by limiting maximum single charging weight,adjusting blasting excavation direction and reducing front-row burden.