肖文芳;李宇珅;方凯明;徐明飞;
XIAO Wen-fang;LI Yu-sheng;FANG Kai-ming;XU Ming-fei;College of Urban-rural Planning and Civil Engineering of Guiyang University;

• 1:贵阳学院城乡规划与建筑工程学院

摘要(Abstract)：

为了研究地铁隧道爆破振动规律并有效地控制爆破振动危害,对贵阳地铁二号线一期工程隧道爆破开挖进行实时监测,然后对监测数据进行回归分析,计算出爆破地震波衰减系数α和k值,并利用大型有限元软件LS-DYNA对爆破施工进行数值模拟,结果表明:用萨道夫斯基公式对地铁隧道掘进的地表振动速度进行拟合时,隧道掘进前方比掘进后方的相关性较好,数值模拟计算所获得的地表振动速度规律与现场监测结果基本一致,地铁隧道掌子面后方已开挖区的地表振动速度存在放大现象。因此,在进行爆破施工方案设计时,必须考虑已开挖区的地表振动速度放大的影响,保障掌子面后方地表建筑物的安全。
To study the law of blasting vibration of metro tunnel construction and effectively reduce the harm,real-time monitoring is conduct on the blasting excavation for the first-stage project of line 2 of Guiyang metro.The next procedure is to conduct regression analysis on the monitoring data,from which the coefficient for blasting wave attenuation could be figured out.Then the finite element software LS-DYNA is used to carry out numerical simulation on the blasting construction.Results have showed when the Sadaovsk formula is used to fit vibration velocity of ground surface during tunnel construction,the correlation works better in the front tunneling than the back one.The law for vibration velocity of ground surface in numerical simulation is basically the same from the on-site monitoring results.Amplification effect exists in the rear tunneling area of the tunnel face.For this reason,during the construction design,the amplification effect of vibration velocity at the ground surface should be taken into account to ensure the safety of the buildings above the surface of the tunnel face.

关键词(KeyWords)： 钻爆施工;数值模拟;放大效应;地表振速
drilling and blasting construction;numerical simulation;amplification effect;vibration velocity of ground surface

Abstract:

Keywords:

基金项目(Foundation): 贵州省联合基金资助项目(黔科合LH字[2014]7199号)

作者(Authors): 肖文芳;李宇珅;方凯明;徐明飞;
XIAO Wen-fang;LI Yu-sheng;FANG Kai-ming;XU Ming-fei;College of Urban-rural Planning and Civil Engineering of Guiyang University;

参考文献(References)：

• [1]祝文化,宋成梓,陈卫雄,等.复杂环境下地铁车站基坑爆破振动效应的试验研究[J].爆破,2009,26(2):99-101,107.ZHU W H,SONG C Z,CHEN W X,et al.Experimental research on blasting vibration effect in excavation of subway station under complex environment[J].Blasting,2009,26(2):99-101,107.
• [2]张继春,曹孝君,郑爽英,等.浅埋隧道掘进爆破的地表震动效应试验研究[J].岩石力学与工程学报,2005(22):4 158-4 163.ZHANG J C,CAO X J,ZHENG S Y,et al.Experimental study on vibration effects of ground due to shallow tunnel blasting[J].Chinese Journal of Rock Mechanics and Engineering,2005(22):4 158-4 163.
• [3]阳生权,周健,李雪健.小净距公路隧道爆破震动观测与分析[J].工程爆破,2005,11(3):66-69.YANG S Q,ZHOU J,LI X J.Blasting vibration analysis of little-space road tunnel[J].Engineering Blasting,2005,11(3):66-69.
• [4]唐曌,路世伟,龚彦峰,等.隧道下穿运营机场跑道的爆破振动安全判据研究[J].铁道标准设计,2017,61(4):100-104.TANG Z,LU S W,GONG Y F,et al.Blasting vibration safety criterion for tunnel under-passing airport runway[J].Railway Standard Design,2017,61(4):100-104.
• [5]卢文波,周俊汝,陈明,等.爆破振动主频衰减公式研究[J].工程爆破,2015,21(6):1-6,24.LU W B,ZHOU J R,CHEN M,et al.Study on attenuation formula of dominant frequency of blasting vibration[J].Engineering Blasting,2015,21(6):1-6,24.
• [6]国家安全生产监督管理总局.爆破安全规程:GB 6722-2014[S].北京:中国标准出版社,2015.State Administration of Work Safety.Safety regulations for blasting:GB 6722-2014[S].Beijing:China Standards Press,2015.
• [7]陈俊桦,李新平,张家生.基于爆破损伤的岩台保护层开挖爆破参数研究[J].岩石力学与工程学报,2016,35(1):98-108.CHEN J H,LI X P,ZHANG J S.Study on blasting parameters of protective layer excavation of rock bench based on blasting-induced damage[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(1):98-108.
• [8]肖文芳.地铁隧道掘进爆破振动测试与数值模拟研究[D].武汉:武汉理工大学,2011:22-34.XIAO W F.Study of vibration testing and numerical simulation on metro tunnel excavation blasting[D].Wuhan:Wuhan University of Technology,2011:22-34.