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洞身地质为岩体的隧道目前主要采用矿山法爆破开挖施工,而城市地铁隧道往往修建于人口密集街区,隧道埋深浅,且周边建筑物密集、地下管线复杂,如何进行爆破开挖与振动控制成为地市地铁爆破施工的关键。分析了爆破产生破坏的机理、爆破地震波的形成和特征,结合工程实践,从爆破设计中炮眼布置、装药量、振速等的计算方法、施工过程中的控制,阐述了城市地铁隧道爆破开挖与振动控制技术要点。
At present, tunnels with underground geology as rock mass are mainly used for excavation and excavation by means of mining method. However, urban subway tunnels are often built in densely populated neighborhoods, with shallow depths of tunnels, dense surrounding buildings and complicated underground pipelines. How to carry out blasting excavation and vibration Control to become the city subway blasting construction key. The mechanism of blasting failure and the formation and characteristics of blasting seismic wave are analyzed. Combining with engineering practice, the blasting design of blasthole layout, charge, vibration velocity and control during construction are described. Dug and vibration control technology points.