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城市内基坑开挖或区间隧道施工,采用爆破开挖的应用日趋广泛。文章分析了爆破产生破坏的机理、爆破地震波的形成和特征,提出了城市地铁爆破开挖方案选择的要点,介绍了爆破设计中炮眼布置、装药量、振速等的计算方法,对爆破开挖设计和施工的注意事项进行了说明。
In the city excavation or interval tunnel construction, the use of blasting excavation is increasingly widespread. This paper analyzes the mechanism of blasting destruction, the formation and characteristics of blasting seismic wave, puts forward the key points of blasting excavation scheme in urban subway, introduces the calculation method of blasthole design, charge, vibration velocity and so on. Dug design and construction of the note was described.