宋鑫华;吴港;姜殿科;李成;闫鸿浩;
SONG Xin-hua;WU Gang;JIANG Dian-ke;LI Cheng;YAN Hong-hao;Department of Engineering Mechanics, Dalian University of Technology;Dalian Power Supply Co., Ltd.;

• 1:大连理工大学工程力学系
• 2:国网辽宁省电力有限公司大连供电公司

摘要(Abstract)：

为了适应城市密集建筑物下浅埋隧道爆破对振动的高安全要求,设计了一种基于孔内外对称分布的延时控爆技术。以大连恒隆广场地下通道的施工为背景,利用导爆管雷管延时特征,对掌子面进行孔内外对称分布,预留核心土和拱顶非爆层,对测得的振动速度进行傅里叶分析。结果表明,3个时域有振动图谱,持续800 ms,从地面测得的振动合速度为4.846 cm/s,振动主频为47 Hz,设计的孔内外对称分布延时控爆方法可以提升主频范围,降低对周围建筑物的影响;发明的孔内外对称分布延时控爆方法,可以利用导爆管雷管的毫秒延时功能合理控制延时时间,使得3段信号的振动特性相近,降低振动效应显著。本方法可以为城市浅埋隧道爆破提供一种借鉴模式。
In order to meet the requirements of high-safety blasting vibration of shallow tunnel in the city of high-density structure, a delay controlled blasting technology of symmetrical inside and outside of shallow tunnel was designed. Taking the construction of Dalian Henglong Square underground passage as the background, using the delay characteristics of nonel detonator, the tunnel face is symmetrically distributed inside and outside the hole, and the core soil and non-blasting layer on the vault are reserved. The measured vibration velocity is analyzed by Fourier transform. The results show that there are vibration spectra in three-time domain, lasting for 800 ms, the combined velocity of vibration measured from the ground is 4.846 cm/s, and the main frequency of vibration is 47 Hz. The designed millisecond-controlled blasting method with symmetrical distribution inside and outside the hole can improve the main frequency range and reduce the impact on the surrounding buildings. The symmetrical distribution delay control blasting method inside and outside the hole is invented. By using the millisecond delay function of nonel detonator can control the reasonable millisecond time. The vibration characteristics of the three sections of signals are similar and the vibration effect is significantly reduced. This method can provide a reference mode for the city shallow tunnel blasting.

关键词(KeyWords)： 对称分布;延时控爆;爆破振动;浅埋隧道
symmetrical distribution;delay-controlled blasting;blasting vibration;shallow tunnel

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司科技资助项目(No.2019YF-44)

作者(Authors): 宋鑫华;吴港;姜殿科;李成;闫鸿浩;
SONG Xin-hua;WU Gang;JIANG Dian-ke;LI Cheng;YAN Hong-hao;Department of Engineering Mechanics, Dalian University of Technology;Dalian Power Supply Co., Ltd.;

参考文献(References)：

• [1] 闫鸿浩,王小红.城市浅埋隧道爆破原理及设计[M].北京:中国建筑工业出版社,2013:55-58.YAN H H,WANG X H.Principle and design of urban shallow buried tunnel blasting [M].Beijing:China Building Industry Press,2013:55-58.
• [2] 姜鸿.城市地下隧道掘进减震爆破方案评价研究[J].科技通报,2017(33):257.JIANG H.Evaluation research on mitigation blasting scheme forurban underground tunnel tunneling [J].Science and Technology Bulletin,2017(33):257.
• [3] 李夕兵,凌同华,张义平.爆破震动信号分析理论与技术[M].北京:科学出版社,2009:244-246.LI X B,LING T H,ZHANG Y P.Theory and technology of blasting vibration signal analysis [M].Beijing:Science Press,2009:244-246.
• [4] 黄勇军,刘春成,彭逸辉.控制爆破在高速公路尾矿库区施工中的运用[J].公路工程,2012,37(2):101-105.HUANG Y J,LIU C C,PENG Y H.Application of controlled blasting in construction of highway tailings pond area [J].Highway Engineering,2012,37(2):101-105.
• [5] 龚敏,吴昊骏,孟祥栋,等.密集建筑物下隧道开挖微振控制爆破方法与振动分析[J].爆炸与冲击,2015,35(3):350-358.GONG M,WU H J,MENG X D,et al.Methods and vibration analysis of micro-vibration controlled blasting in tunnel excavation under dense buildings [J].Explosion and Shock Waves,2015,35(3):350-358.
• [6] 胡葵.城镇闹市区地铁车站基坑的控制爆破[J].爆破器材,2016,45(6):51-56.HU K.Controlled blasting of foundation pit in urban downtown subway station [J].Explosive Materials,2016,45(6):51-56.
• [7] 袁文华,马芹永,黄伟.楔形掏槽微差爆破模型试验与分析[J].岩石力学与工程学报,2012,31(S1):3 352-3 356.YUAN W H,MA Q Y,HUANG W.Model experiment and analysis of wedge-shaped cutting millisecond blasting[J].Journal of Rock Mechanics and Engineering,2012,31(S1):3 352-3 356.
• [8] SHI X Z,QIU X Y,ZHOU J,et al.Application of Hilbert-Huang transform based delay time identification in optimization of short millisecond blasting[J].Transactions of Nonferrous Metals Society of China,2016,26(7):1 965-1 974.
• [9] 陈士海,燕永峰,戚桂峰,等.微差爆破降震效果影响因素分析[J].岩土力学,2011,32(10):3 003-3 008.CHEN S H,YAN Y F,QI G F,et al.Analysis of influencing factors of millisecond-delay blasting damping effect [J].Rock and Soil Mechanics,2011,32(10):3 003-3 008.
• [10] 国家安全生产管理总局.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.
• [11] 李晓杰,齐凯文,闫鸿浩,等.金马大厦折叠爆破拆除塌落与爆破振动分析[J].工程爆破,2012,18(2):60-64.LI X J,QI K W,YAN H H,et al.Analysis on collapse and blasting vibration offolding blasting demolition of Jinma Building [J].Engineering Blasting,2012,18(2):60-64.
• [12] 赵铁军,徐佩洪,陈翔,等.城市隧道竖井爆破振动控制研究[J].西北水电,2017(5):47-49.ZHAO T J,XU P H,CHEN X,et al.Research on vibration control of urban tunnel shaft blasting [J].Northwest Hydropower,2017(5):47-49.
• [13] 倪文婧.径向不耦合装药爆破效果的数值研究[J].工程爆破,2019,25(3):12-16.NI W J.Numerical study on the effect of radial uncoupled charge blasting [J].Engineering Blasting,2019,25(3):12-16.
• [14] BRIGHAM E O,YUEN C K.The fast fourier transform[J].Acoustics Speech & Signal Processing,2007,4(12):63-70.